CN109811681A - A kind of highway barrier and its manufacturing method - Google Patents
A kind of highway barrier and its manufacturing method Download PDFInfo
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- CN109811681A CN109811681A CN201910053050.9A CN201910053050A CN109811681A CN 109811681 A CN109811681 A CN 109811681A CN 201910053050 A CN201910053050 A CN 201910053050A CN 109811681 A CN109811681 A CN 109811681A
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Abstract
The present invention provides a kind of highway barrier and its manufacturing methods, wherein highway barrier includes column, obstruction block and waveform beam slab, the lower end of column is arranged in ground, column is vertically arranged and inner hollow, the upper end of column is connect by fixing piece with obstruction block, and the one end of obstruction block far from column is connect by fixing piece with waveform beam slab；Column and obstruction block are not less than the hot-strip of 420MPa using elongation after fracture not less than 21%, lower yield strength, and waveform beam slab is not less than the hot-strip of 540MPa using elongation after fracture not less than 19.5%, lower yield strength；The difference of the lower yield strength for the hot-strip that the lower yield strength and obstruction block for the hot-strip that waveform beam slab uses use is greater than 60MPa and is less than 200MPa.Highway barrier of the invention can be effectively reduced vehicle and head-on hit the indexs such as the vehicle maximum dynamic flare equivalent value after guardrail, cushion performance is preferable, preferably guarantees the safety of passengers inside the car under the premise of effectively control cost.
Description
Technical field
The invention belongs to transportation facilities technology more particularly to a kind of highway barrier and its manufacturing methods.
Background technique
In recent years, China especially payes attention to the development of the Class II highways such as national highway, provincial highway, and has become the weight of the comprehensive system of transport
Want component part.Now, highway in China construction progresses into peak period, and the demand of highway guardrail material constantly increases, product
Kind is also constantly updated.The highway system of building security is to promote the important means of highway traffic safety therefore constructing from actively
Measure then cannot especially ignore the protective performance upgrading of highway barrier to " during the traffic safety defence line " of passive protection.
The waveform beam slab of the highway barrier of two (B) grade degree of protection that the Class II highways such as China's national highway, provincial highway use at present
Using Medium And Low Strength Steels as raw material, general Medium And Low Strength Steels select Q235 common carbon structural steel, and with all kinds of automobiles in recent years
Possess the rapid growth of quantity, the highway rate that is open to traffic also greatly improves, and requires accordingly the protective performance of highway barrier also more next
It is higher.In order to meet the protective performance of highway barrier requirements at the higher level, column, obstruction block and the waveform cantilever thickness needed is larger,
Waveform cantilever thickness is typically designed to 3.0mm~4.0mm, column and obstruction block with a thickness of 4.5mm, therefore the dosage of steel is larger,
So higher cost.
Summary of the invention
In order to solve the above technical problems, the present invention proposes a kind of highway barrier and its manufacturing method.When the vapour run at high speed
When vehicle collides guardrail, there is higher protective performance, while cost is relatively low.
In order to achieve the above object, the technical solution of first aspect present invention is as follows: a kind of highway barrier, including column,
The lower end of obstruction block and waveform beam slab, the column is arranged in ground, and the column is vertically arranged and inner hollow, described vertical
The upper end of column is connect by fixing piece with obstruction block, and the one end of the obstruction block far from column is connected by fixing piece and waveform beam slab
It connects；The column and obstruction block are not less than the hot-strip of 420MPa using elongation after fracture not less than 21%, lower yield strength,
The waveform beam slab is not less than the hot-strip of 540MPa using elongation after fracture not less than 19.5%, lower yield strength；The wave
The difference of the lower yield strength for the hot-strip that the lower yield strength and the obstruction block for the hot-strip that ellbeam plate uses use
Greater than 60MPa and it is less than 200MPa；The column minimum thickness is 3mm, and the obstruction block minimum thickness is 3mm, the wave
Ellbeam plate minimum thickness is 2mm.
Preferably, the elongation after fracture for the hot-strip that the waveform beam slab uses is less than the heat that the obstruction block uses
Roll the elongation after fracture of strip.
Preferably, the lower yield strength for the hot-strip that the obstruction block uses is 420MPa ~ 580MPa；The wave
The lower yield strength for the hot-strip that ellbeam plate uses is 540MPa ~ 780MPa.
Preferably, the column with a thickness of 3 ~ 3.5mm, the obstruction block with a thickness of 3 ~ 3.5mm, the wave beams
Plate with a thickness of 2.0 ~ 3.0mm.
Preferably, the diameter of the column is 114mm, length 1960mm；The length of the obstruction block be 130mm,
Width is 100mm, is highly 200mm；The length of the waveform beam slab is 4300mm, width 335mm, is highly 95mm, wave
Spacing is 167.5mm, is the plane area of 28mm at the trough of the waveform beam slab.
The technical solution of the second aspect of the present invention is as follows: a kind of manufacturing method of highway barrier includes the following steps,
Step 1: using hot rolled steel plate as raw material, using the straight seam welded pipe after hot rolled steel plate welding processing as column；
Step 2: using hot rolled steel plate as raw material, hot rolled steel plate being made after mold cold roll forming and welding processing and is deterred
Block；
Step 3: using hot rolled steel plate as raw material, waveform beam slab will be made after hot rolled steel plate roll-in or punch forming；
Step 4: the column in step 1, the waveform beam slab in the obstruction block and step 3 in step 2 are assembled by fixing piece and made
At highway barrier.
Preferably, the raw material of the column and obstruction block hot-strip composition includes: 0.04 according to weight percent
~0.10% C, 0.19~0.50% Si, 1.3~1.80% Mn, 0.024~0.040% Al, 0.012~0.050%
Ti, 0.025~0.030% Nb, the S of≤0.01wt% ,≤0.025% P ,≤0.005% N and the Fe of surplus and impurity；
The raw material of the column and obstruction block hot-strip is smelted through converter and LF furnace and to form molten steel, using completely without head sheet billet
The hot-strip is prepared in casting and rolling process.
Wherein, described completely without head continuous casting and rolling technique of sheet bar successively includes continuous casting, roughing, induction heating, finish rolling, laminar flow
Cooling and coiling process；The roughing is put into inlet temperature >=770 DEG C, and the outlet temperature of the induction heating is 900 DEG C~980
DEG C, the outlet temperature of the finish rolling is 615 DEG C~645 DEG C, and the temperature batched is 370 DEG C~480 DEG C；The drawing of the continuous casting
Speed is 4.0m/min~6.0m/min.
Preferably, the raw material of the column and obstruction block hot-strip composition includes: 0.04 according to weight percent
~0.10% C, 0.22~0.50% Si, the Mn of 1.3~1.8t%, 0.030~0.040% Al, 0.040~0.050%
Ti, 0.025~0.030% Nb ,≤0.01% S ,≤0.025% P ,≤0.005% N and the Fe of surplus and impurity；Institute
It states column and obstruction block and is smelted through converter and LF furnace with the raw material of hot-strip and to form molten steel, connect using completely without head sheet billet
The hot-strip is prepared in casting continuous rolling process.
Wherein, described completely without head continuous casting and rolling technique of sheet bar successively includes continuous casting, roughing, induction heating, finish rolling, laminar flow
Cooling and coiling process；Inlet temperature >=780 DEG C of the roughing, the outlet temperature of the induction heating are 900 DEG C~980
DEG C, the outlet temperature of the finish rolling is 640 DEG C~680 DEG C, and the temperature batched is 440 DEG C~490 DEG C；The drawing of the continuous casting
Speed is 4.0m/min~6.0m/min.
Beneficial effects of the present invention:
Highway barrier provided by the invention can effectively reduce vehicle and head-on hit the vehicle after guardrail when by Vehicular impact
Maximum dynamic flare value (VI) and vehicle maximum dynamic flare equivalent value (VIn), it may be assumed that more steady posture after Vehicular impact, and energy
It is enough meet station wagon as defined in " highway barrier security performance evaluation standard " (B05-01-2013 JTG), middle bus and in
Type lorry real vehicle full size crash requirements under the conditions ofs providing gross mass, impact velocity, collision angle and collision energy etc., have excellent
Different cushion performance preferably guarantees the safety of passengers inside the car.
Highway barrier provided by the invention and its manufacturing method while improving security protection performance index, keep steel plate thick
Degree has obtained appropriate optimization, comparison China's national highway, provincial highway Class II highway generally use with Medium And Low Strength Steels (Q235 normal carbon knot
Structure steel) be raw material, and wave beams with a thickness of 3.0mm or 4.0mm and column and obstruction block with a thickness of the wave beams of highway of 4.5mm
Steel guard rail, every kilometer of highway save 30% or more sheet stock dosage, and there is no raising or even certain journeys for cost
Guardrail manufacturing cost is reduced on degree, and there is significant economic benefit.And reduce social iron and steel resource consumption, it is also just corresponding
Granular material discharged, the SO for reducing steel and iron manufacturing2Discharge, NOXDischarge, have significant social benefit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of highway barrier of the invention；
Fig. 2 is the driving trace top view that the primary collision of middle bus is tested；
Fig. 3 is the driving trace top view that the primary collision of station wagon is tested；
Fig. 4 is the driving trace top view that the primary collision of medium truck is tested；
Wherein: 1. columns, 2. obstruction blocks, 3. waveform beam slabs, 4. fixing pieces.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments, to help those skilled in the art
There is more complete, accurate and deep understanding to inventive concept of the invention, technical solution.
Inexpensive highway barrier vehicle maximum dynamic flare value (VI) and vehicle cannot be solved for existing in the prior art
Maximum dynamic flare equivalent value (VIn) higher (that is: posture is unstable after Vehicular impact) and collide that post-acceleration is higher etc. to ask
Topic, provides a kind of two (B) grade degree of protection highway barriers with excellent protective performance.The present invention has abandoned only main consideration
The design solution of corrugated beam barrier material or structural behaviour, and propose a kind of light weight of hot rolled steel plate based on steel alloy
Change highway barrier, the present invention has comprehensively considered the material performance requirement of column, obstruction block, waveform beam slab, especially Optimum Synthesis
Consider the material property of obstruction block, waveform beam slab, and verifies to have obtained technical solution of the present invention by simulation and actual collision.
In addition, weathering steel used by steel alloy employed in the present invention, especially waveform beam slab is by the base in the prior art
On plinth, improvement to material and technique, and reached required fracture elongation and intensity requirement.
As shown in Figure 1, two (B) grade degree of protection highway barriers of the invention include column 1, obstruction block 2 and waveform beam slab
3, the lower end of the column 1 is arranged in ground, and the column 1 is vertically arranged and inner hollow, and the upper end of the column 1 passes through
Fixing piece 4 is connect with obstruction block 2, and the one end of the obstruction block 2 far from column 1 is connect by fixing piece 4 with waveform beam slab 3.For
Meet and meets two (B) grade standard as defined in JTG/T D81-2017 standard, in the present invention, column minimum thickness is 3mm,
The obstruction block minimum thickness is 3mm, and the waveform beam slab minimum thickness is 2mm；Column and obstruction block use elongation after fracture
Not less than the hot-strip that 21%, lower yield strength is not less than 420MPa, waveform beam slab using elongation after fracture not less than 19.5%,
Lower yield strength Re1 is not less than the hot-strip of 540MPa；And the lower yield strength Re1 for the hot-strip that waveform beam slab uses
The difference of the lower yield strength Re1 of the hot-strip used with obstruction block is greater than 60MPa and is less than 200MPa, further,
The difference is to be not more than 185MPa not less than 90MPa.In the present invention, by will be used by waveform beam slab and obstruction block
The elongation at break of hot-strip is met the above range, and when lower yield strength relationship is met the above range, even if by column
And the thickness of obstruction block is thinned to 3.0mm, the thickness of waveform beam slab, which is thinned to 2mm also, can obtain optimal blocking, lead
To function, and collisional stabilization is good.If under the hot-strip that the lower yield strength Re1 of hot-strip and obstruction block use
The difference of yield strength Re1 is less than 60MPa, it is impossible to good cushion performance is obtained, so that collisional stabilization declines；In addition,
If the difference of the two, which is greater than 200MPa, equally also results in collisional stabilization variation.Additionally preferably, meeting above-mentioned fracture
Under conditions of elongation, the elongation after fracture for the hot-strip that waveform beam slab uses is less than the hot-strip that the obstruction block uses
Elongation after fracture, better effect can be obtained.
Column, obstruction block and wave beams as specific application example, in following embodiments of the invention and comparative example
Sample number into spectrum and the performance difference of hot-strip used by plate are as follows:
The mechanical property of column hot-strip is as shown in table 1:
Table 1
The number and mechanical property of obstruction block hot-strip are as shown in table 2:
Table 2
The number and mechanical property of waveform beam slab hot-strip are as shown in table 3:
Table 3
The present invention also provides a kind of manufacturing methods of highway barrier, include the following steps, step 1: using hot rolled steel plate conduct
Raw material, using the straight seam welded pipe after hot rolled steel plate welding processing as column；Step 2: using hot rolled steel plate as raw material, by hot rolling
Obstruction block is made after mold cold roll forming and welding processing in steel plate；Step 3: using hot rolled steel plate as raw material, by hot-rolled steel
Waveform beam slab is made after plate roll-in or punch forming；Step 4: will be in the column in step 1, the obstruction block and step 3 in step 2
Waveform beam slab by fixing piece assembling highway barrier is made.
In a preferred embodiment of the invention, the raw material of column and obstruction block hot-strip is formed are as follows: 0.04~
The C of 0.10wt%, the Si of 0.19~0.50wt%, the Mn of 1.3~1.80wt%, the Al of 0.024~0.040wt%, 0.012~
The N of the Ti of 0.050wt%, the Nb of 0.025~0.030wt%, the S of≤0.01wt%, the P of≤0.025wt% ,≤0.005wt%, with
And the Fe and inevitable impurity of surplus；It smelts to form molten steel through LF furnace, using completely without head continuous casting and rolling technique of sheet bar
Hot-strip is prepared.Described completely without in head continuous casting and rolling technique of sheet bar, molten steel successively passes through continuous casting, roughing, induction
Heating, finish rolling, section cooling and coiling process finally obtain hot-strip；And roughing inlet temperature >=770 DEG C, induction heating
Outlet temperature is 900 DEG C~980 DEG C, and exit temperature at finishing is 615 DEG C~645 DEG C, and coiling temperature is 370 DEG C~480 DEG C；Continuous casting
Pulling rate is 4.0m/min~6.0m/min.The lower yield strength of above-mentioned hot-strip is 420MPa ~ 559MPa, and tensile strength is
489 ~ 625MPa, elongation at break are 21% or more.
In another preferred embodiment of the invention, the raw material of waveform beam slab hot-strip is formed are as follows: 0.04~
The C of 0.10wt%, the Si of 0.22~0.50wt%, the Mn of 1.3~1.80wt%, the Al of 0.030~0.040 wt%, 0.040~
The N of the Ti of 0.050wt%, the Nb of 0.025~0.030 wt%, the S of≤0.01wt%, the P of≤0.025wt% ,≤0.005wt%, with
And the Fe and inevitable impurity of surplus；Raw material is smelted through converter and LF furnace and to form molten steel, using completely without head sheet billet
The hot-strip is prepared in casting and rolling process.It is described completely without in head continuous casting and rolling technique of sheet bar, molten steel successively passes through
Continuous casting, roughing, induction heating, finish rolling, section cooling and coiling process obtain hot-strip；And roughing inlet temperature >=780
DEG C, induction heating outlet temperature is 900 DEG C~980 DEG C, and exit temperature at finishing is 640 DEG C~680 DEG C, and coiling temperature is 440 DEG C
~490 DEG C；Pulling speed of continuous casting is 4.0m/min~6.0m/min.By to constituent content and technological parameter (degree of superheat and company
Cast pulling rate) lower yield strength of the hot-strip is 546MPa ~ 726MPa, tensile strength is 594 ~ 786MPa, extension at break
Rate is 19.5% or more.
The specific application example non-limiting as one, in following embodiment or comparative example of the invention, column
Spacing is 4000mm, and the overall height after guardrail installation is the above height component in the bottom surface 750mm ± 20mm().Steel column diameter is
φ 114mm, with a thickness of 3mm, length 1960mm；The length of obstruction block is 130mm, width 100mm, is highly 200mm, thickness
Degree is 3mm, and the one side that obstruction block contacts steel column is the cambered surface of R57 radius；The length of waveform beam slab is 4300mm, width is
335mm, be highly 95mm, with a thickness of 2mm, wave spacing is 167.5mm, at the plane area that is 28mm at trough, wave crest is smooth
The cambered surface area of transition, connection bolt are the standard component of M16 material.
For highway barrier of the invention, according to " highway barrier security performance evaluation standard " (JTGB05-01-2013)
Defined middle bus, station wagon and medium truck are in items such as regulation gross mass, impact velocity, collision angle and collision energies
Real vehicle full size crash requirements carry out collision experiment under part, and Fig. 2 ~ 4 respectively illustrate middle bus, station wagon and medium truck
The top view of collision experiment.
Embodiment one
The column of the present embodiment is vertically arranged and is hollow form, and the spacing of fence upright is 4000mm, total after guardrail installation
Body height is 950mm.Steel column diameter is φ 114mm, with a thickness of 3mm, length 1960mm；The length of obstruction block is
130mm, width 100mm, be highly 200mm, with a thickness of 3mm, obstruction block contact steel column be on one side R57 radius arc
Face, the length of waveform beam slab is 4300mm, width 335mm, be highly 95mm, with a thickness of 2mm, wave spacing be 167.5mm, wave
Be at paddy the plane area of 28mm, at wave crest be smooth transition cambered surface area, connection bolt is the standard component of M16 material.This implementation
The column of example is that number is the hot-strip welded straight seam welded pipe that is process of the L1 with a thickness of 3mm.Obstruction block is that number is
F2 forms with a thickness of the hot-strip of 3mm through mold cold-bending forming machine roll-forming and welding processing.Waveform beam slab is that number is
B2 with a thickness of 2mm hot-strip through molding machine roll-in or punch forming.
The highway barrier of the present embodiment is 1495kg, impact velocity 60.5km/h, touches in station wagon vehicular gross combined weight
The collision of real vehicle full size is carried out under conditions of breakhead degree is 20.2 °, collision energy is 25kJ, vehicle does not pass through, do not cross and do not ride
Across guardrail, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheelmark after vehicle collision
Meet guiding be driven out to frame requirement, occupant crash's speed longitudinal direction x is 2.8(m/s), occupant crash's speed transverse direction y be 3.6(m/s), multiply
Member collision post-acceleration longitudinal direction x be 52.2(m/s2), occupant crash's post-acceleration transverse direction y be 81.3(m/s2), guardrail maximum cross
It is 0.61m to dynamic displacement extension value (W).
The highway barrier of the present embodiment, middle bus vehicular gross combined weight be 10035kg, impact velocity 40.0km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.5 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.57m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 0.99m.
The highway barrier of the present embodiment, medium truck vehicular gross combined weight be 10075kg, impact velocity 40.1km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.2 °, collision energy is 74kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.80m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 1.05m.
Embodiment two
Other parts are identical as in 1 structure of embodiment, the difference is that only obstruction block and waveform beam slab thickness and heat used
Roll the mechanical property of strip.Obstruction block be number be F1 with a thickness of 3mm hot-strip through mold cold-bending forming machine roll-forming
And welding processing forms.Waveform beam slab be number be B1 with a thickness of 2.2mm hot-strip through molding machine roll-in or punch forming.
The highway barrier of the present embodiment is 1492kg, impact velocity 61.5km/h, touches in station wagon vehicular gross combined weight
The collision of real vehicle full size is carried out under conditions of breakhead degree is 20.1 °, collision energy is 26kJ, vehicle does not pass through, do not cross and do not ride
Across guardrail, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheelmark after vehicle collision
Meet guiding be driven out to frame requirement, occupant crash's speed longitudinal direction x is 2.78(m/s), occupant crash's speed transverse direction y be 3.59(m/s),
Occupant crash's post-acceleration longitudinal direction x is 52.1(m/s2), occupant crash's post-acceleration transverse direction y be 81.2(m/s2), guardrail is maximum
Lateral dynamic displacement extension value (W) is 0.58m.
The highway barrier of the present embodiment, middle bus vehicular gross combined weight be 10036kg, impact velocity 40.1km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.4 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.59m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 0.98m.
The highway barrier of the present embodiment, medium truck vehicular gross combined weight be 10076kg, impact velocity 40.2km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 19.8 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.79m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 1.02m.
Embodiment three
Other parts are identical as in 1 structure of embodiment, the difference is that only obstruction block and waveform beam slab thickness and heat used
Roll the mechanical property of strip.Obstruction block with a thickness of 3mm, waveform beam slab with a thickness of 2.3mm.Obstruction block is the heat that number is F4
Strip is rolled through mold cold-bending forming machine roll-forming and welding processing forms.Waveform beam slab is the hot-strip that number is B3 thickness
Through molding machine roll-in or punch forming.
The highway barrier of the present embodiment is 1490kg, impact velocity 61.2km/h, touches in station wagon vehicular gross combined weight
The collision of real vehicle full size is carried out under conditions of breakhead degree is 20.2 °, collision energy is 25.5kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meet guiding is driven out to frame requirement, occupant crash's speed longitudinal direction x is 2.75(m/s), occupant crash's speed transverse direction y be 3.42(m/
S), occupant crash's post-acceleration longitudinal direction x is 51.4(m/s2), occupant crash's post-acceleration transverse direction y be 79.6(m/s2), guardrail is most
Big transverse direction dynamic displacement extension value (W) is 0.65m.
The highway barrier of the present embodiment, middle bus vehicular gross combined weight be 10034kg, impact velocity 40.2km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.3 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.60m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 1.12m.
The highway barrier of the present embodiment, medium truck vehicular gross combined weight be 10075kg, impact velocity be 40.3 km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.1 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.75m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 0.98m.
Example IV
Other parts are identical as in 1 structure of embodiment, the difference is that only obstruction block and waveform beam slab thickness and heat used
Roll the mechanical property of strip.Obstruction block with a thickness of 3mm, waveform beam slab with a thickness of 2.5mm.Obstruction block is the heat that number is F3
Strip is rolled through mold cold-bending forming machine roll-forming and welding processing forms.Waveform beam slab be number be B4 hot-strip through at
The roll-in of type machine or punch forming.
The highway barrier of the present embodiment is 1494kg, impact velocity 60.6km/h, touches in station wagon vehicular gross combined weight
The collision of real vehicle full size is carried out under conditions of breakhead degree is 20.3 °, collision energy is 25kJ, vehicle does not pass through, do not cross and do not ride
Across guardrail, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheelmark after vehicle collision
Meet guiding be driven out to frame requirement, occupant crash's speed longitudinal direction x is 2.64(m/s), occupant crash's speed transverse direction y be 3.32(m/s),
Occupant crash's post-acceleration longitudinal direction x is 51.2(m/s2), occupant crash's post-acceleration transverse direction y be 79.3(m/s2), guardrail is maximum
Lateral dynamic displacement extension value (W) is 0.75m.
The highway barrier of the present embodiment, middle bus vehicular gross combined weight be 10035kg, impact velocity 40.1km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.3 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.62m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 1.12m.
The highway barrier of the present embodiment, medium truck vehicular gross combined weight be 10073 kg, impact velocity 40.2km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.3 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.75m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 0.93m.
Comparative example one
Other parts are identical as in 1 structure of embodiment, the difference is that only obstruction block and waveform beam slab thickness and heat used
Roll the mechanical property of strip.Obstruction block be number be F3 with a thickness of 3mm hot-strip through mold cold-bending forming machine roll-forming
And welding processing forms.Waveform beam slab be number be B2 with a thickness of 2.2mm hot-strip through molding machine roll-in or punch forming.
The highway barrier of this comparative example, middle bus vehicular gross combined weight be 10035kg, impact velocity 40.1km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.4 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.61m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 1.04m.
Comparative example two
Other parts are identical as in 1 structure of embodiment, the difference is that only obstruction block and waveform beam slab thickness and heat used
Roll the mechanical property of strip.Obstruction block be number be F2 with a thickness of 3mm hot-strip through mold cold-bending forming machine roll-forming
And welding processing forms.Waveform beam slab be number be B1 with a thickness of 2.3mm hot-strip through molding machine roll-in or punch forming.
The highway barrier of this comparative example, middle bus vehicular gross combined weight be 10034kg, impact velocity 40.2km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.3 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.62m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 1.12m.
Comparative example three
Other parts are identical as in 1 structure of embodiment, the difference is that only obstruction block and waveform beam slab thickness and heat used
Roll the mechanical property of strip.Obstruction block be number be F1 with a thickness of 3mm hot-strip through mold cold-bending forming machine roll-forming
And welding processing forms.Waveform beam slab be number be B3 with a thickness of 2.4mm hot-strip through molding machine roll-in or punch forming.
The highway barrier of this comparative example, middle bus vehicular gross combined weight be 10035kg, impact velocity 40.1km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.2 °, collision energy is 75kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.63m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 1.14m.
Comparative example four
Other parts are identical as in 1 structure of embodiment, the difference is that only obstruction block and waveform beam slab thickness and heat used
Roll the mechanical property of strip.Obstruction block be number be F3 with a thickness of 3mm hot-strip through mold cold-bending forming machine roll-forming
And welding processing forms.Waveform beam slab is the hot-strip with a thickness of 2.5mm through molding machine roll-in or punch forming, the hot-rolled strip
The lower yield strength of steel is 782MPa, tensile strength 846MPa, elongation at break 16.5%.
The highway barrier of this comparative example, middle bus vehicular gross combined weight be 10165kg, impact velocity 60.2km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.2 °, collision energy is 175kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 0.98m, and vehicle maximum dynamic flare is worked as
Magnitude (VIn) is 1.33m.
Comparative example five
Other parts are identical as in 1 structure of embodiment, the difference is that only obstruction block and waveform beam slab thickness and heat used
Roll the mechanical property of strip.Obstruction block is to add with a thickness of the hot-strip of 3mm through mold cold-bending forming machine roll-forming and welding
Work forms, and the lower yield strength of the hot-strip is 658MPa, tensile strength 723MPa, elongation at break 18.0%.Waveform
Beam slab be number be B3 with a thickness of 2.5mm hot-strip through molding machine roll-in or punch forming.
The highway barrier of this comparative example, middle bus vehicular gross combined weight be 10162kg, impact velocity 60.5km/h,
The collision of real vehicle full size is carried out under conditions of collision angle is 20.1 °, collision energy is 176kJ, vehicle do not pass through, does not cross and not
Guardrail is ridden, guardrail component and its disengaging fragment do not invade vehicle passenger compartment, do not overturn after vehicle collision, the wheel after vehicle collision
Mark meets guiding and is driven out to frame requirement, and guardrail maximum transversal dynamic displacement extension value (W) is 1.0m, vehicle maximum dynamic flare equivalent
Being worth (VIn) is 1.35m.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (10)
1. a kind of highway barrier, which is characterized in that including column, obstruction block and waveform beam slab, the lower end setting of the column exists
In ground, the column is vertically arranged and inner hollow, and the upper end of the column is connect by fixing piece with obstruction block, described anti-
The one end of stop block far from column is connect by fixing piece with waveform beam slab；The column and obstruction block be not small using elongation after fracture
Be not less than the hot-strip of 420MPa in 21%, lower yield strength, the waveform beam slab using elongation after fracture not less than 19.5%,
Lower yield strength is not less than the hot-strip of 540MPa；The lower yield strength for the hot-strip that the waveform beam slab uses with it is described
The difference of the lower yield strength for the hot-strip that obstruction block uses is greater than 60MPa and is less than 200MPa；The column is minimum thick
Degree is 2mm, and the obstruction block minimum thickness is 3mm, and the waveform beam slab minimum thickness is 2mm.
2. highway barrier according to claim 1, which is characterized in that the hot-strip that the waveform beam slab uses is had no progeny
Elongation is less than the elongation after fracture for the hot-strip that the obstruction block uses.
3. highway barrier according to claim 1, which is characterized in that the lower surrender for the hot-strip that the obstruction block uses
Intensity is 420MPa ~ 580MPa；The lower yield strength for the hot-strip that the waveform beam slab uses is 540MPa ~ 780MPa.
4. highway barrier according to claim 1, which is characterized in that the column with a thickness of 3 ~ 3.5mm, it is described to deter
Block with a thickness of 3 ~ 3.5mm, the waveform beam slab with a thickness of 2.0 ~ 3.0mm.
5. highway barrier according to claim 1, which is characterized in that the diameter of the column is 114mm, length is
1960mm；The length of the obstruction block is 130mm, width 100mm, is highly 200mm；The length of the waveform beam slab is
4300mm, width 335mm, be highly 95mm, wave spacing it is 167.5mm, is the flat of 28mm at the trough of the waveform beam slab
Face area.
6. the manufacturing method of highway barrier described in any one of claim 1 to 5, which is characterized in that include the following steps,
Step 1: using hot rolled steel plate as raw material, using the straight seam welded pipe after hot rolled steel plate welding processing as column；
Step 2: using hot rolled steel plate as raw material, hot rolled steel plate being made after mold cold roll forming and welding processing and is deterred
Block；
Step 3: using hot rolled steel plate as raw material, waveform beam slab will be made after hot rolled steel plate roll-in or punch forming；
Step 4: the column in step 1, the waveform beam slab in the obstruction block and step 3 in step 2 are assembled by fixing piece and made
At highway barrier.
7. the manufacturing method of highway barrier according to claim 6, which is characterized in that the column and obstruction block hot rolling
It includes: 0.04~0.10% C, 0.19~0.50% Si, 1.3~1.80% that the raw material of strip, which is formed according to weight percent,
Mn, 0.024~0.040% Al, 0.012~0.050% Ti, 0.025~0.030% Nb ,≤0.01wt% S ,≤
0.025% P ,≤0.005% N and the Fe of surplus and impurity；The raw material of the column and obstruction block hot-strip is through turning
Furnace and LF furnace are smelted to form molten steel, and the hot-strip is prepared using completely without head continuous casting and rolling technique of sheet bar.
8. the manufacturing method of highway barrier according to claim 7, which is characterized in that described to connect completely without head sheet blank continuous casting
Roll process successively includes continuous casting, roughing, induction heating, finish rolling, section cooling and coiling process；The roughing is put into inlet temperature
>=770 DEG C, the outlet temperature of the induction heating is 900 DEG C~980 DEG C, and the outlet temperature of the finish rolling is 615 DEG C~645
DEG C, the temperature batched is 370 DEG C~480 DEG C；The pulling rate of the continuous casting is 4.0m/min~6.0m/min.
9. the manufacturing method of highway barrier according to claim 6, which is characterized in that the column and obstruction block hot rolling
It includes: 0.04~0.10% C, 0.22~0.50% Si, 1.3~1.8t% that the raw material of strip, which is formed according to weight percent,
Mn, 0.030~0.040% Al, 0.040~0.050% Ti, 0.025~0.030% Nb ,≤0.01% S ,≤0.025%
P ,≤0.005% N and the Fe of surplus and impurity；The raw material of the column and obstruction block hot-strip through converter and
LF furnace is smelted to form molten steel, and the hot-strip is prepared using completely without head continuous casting and rolling technique of sheet bar.
10. the manufacturing method of highway barrier according to claim 9, which is characterized in that described completely without head sheet blank continuous casting
Continuous rolling process successively includes continuous casting, roughing, induction heating, finish rolling, section cooling and coiling process；The inlet temperature of the roughing
>=780 DEG C, the outlet temperature of the induction heating is 900 DEG C~980 DEG C, and the outlet temperature of the finish rolling is 640 DEG C~680
DEG C, the temperature batched is 440 DEG C~490 DEG C；The pulling rate of the continuous casting is 4.0m/min~6.0m/min.
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| CN115141973A (en) * | 2022-06-08 | 2022-10-04 | 莱芜钢铁集团银山型钢有限公司 | Steel belt for expressway guardrail and manufacturing method thereof |
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