CN108487490B - The composite protection structure of explosion-proof impact - Google Patents
The composite protection structure of explosion-proof impact Download PDFInfo
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- CN108487490B CN108487490B CN201810337815.7A CN201810337815A CN108487490B CN 108487490 B CN108487490 B CN 108487490B CN 201810337815 A CN201810337815 A CN 201810337815A CN 108487490 B CN108487490 B CN 108487490B
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- honeycomb
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/04—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against air-raid or other war-like actions
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- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a kind of composite protection structure of explosion-proof impact, which mainly passes through the point purlin honeycomb fashion monoblock type safeguard structure that solder joint and connecting key are formed by cellular tensile layer and dot matrix truss-like resistance to compression layer, and in outer layer additional foam absorbing energy layer.The structure carries out innovative optimization to the Path of Force Transfer of shelter structure under detonation, can increase substantially the drag grade of safeguard structure, improves structure ductility；And the dispersion of broken concrete in energy restraining structure, eliminates the explosion shock collapse phenomenon of similar conventional concrete safeguard structure.
Description
Technical field
The invention belongs to protection works field, the composite protection structure of specifically a kind of explosion-proof impact.
Background technique
Explosion wave is a kind of strong compressional wave, in instant of detonation, explosive substance in a limited space with the extremely short time
Big energy is inside released, a large amount of high temperature and pressure products of generation squeeze rapidly surrounding medium, make pressure, the density, temperature of medium
The rapid jumping of the physical quantitys such as degree rises to form shock wave.Explosion wave can have very big injury to structure and personnel, prevent
The effect of protection structure is exactly the safety of protection building and personnel, and peak value of shock wave overpressure is effectively reduced.
Most of military architectures can not use underground protective engineering structure at this stage, and more key buildings are exposed to more
Ground.However as the update of advanced precision strike munitions, ground protection works all suffer from the threat repeatedly directly hit at any time,
The defect that traditional defense structure is exposed is more obvious.The protective capacities for how improving the type building just seems especially
Important, defect existing for safeguard structure layer common at present mainly has following four classes:
1, protective layer itself can not load-bearing, can only depend on base layer presence.For example, by using the multilayer sandwich of energy-absorbing material
Hardened structure, lighter weight, antiknock work well, but individually battenboard is difficult to meet load-bearing requirements, while holding to dead load
Loading capability is poor.
2, safeguard structure is difficult to bear multiple blast impulse.Such as fiber cloth reinforced armoured concrete slab, this type structure
Under Blast Loads, easily aggravate the destruction of concrete cover, causes falling off for fiber cloth and lose to multiple explosion punching
The protection hit.
3, protective layer is easily burst apart by blast impulse and secondary injury occurs.In order to improve the shock resistance energy of concrete structure
Power, designer often take the method for increasing thickness and improving concrete strength, and safeguard structure is blocked up so that existing most
Safeguard structure is easy that whole cracking occurs when by blast impulse and block falls off, these fragment high-speed flights peeled off,
To in safeguard structure personnel and facility can bring biggish threat.
4, safeguard structure is from great and be difficult to quickly repair.Such as the antiknock ability of the hardened structure of steel fibre reinforced concrete compared with
By force, but its be applied to construction safety structure often there is biggish thickness and self weight, to seriously limit its scope of application.
Summary of the invention
The invention aims to solve existing for the existing safeguard structure layer of building field can not load-bearing, be difficult to bear repeatedly
Blast impulse, being hit easily to burst apart occurs secondary injury and safeguard structure is difficult to the problems such as quickly repairing, proposition it is a kind of with
Fiber concrete is the cellular compound bursting layer structure in point purlin of main load material.
The purpose of the present invention is achieved through the following technical solutions:
A kind of composite protection structure of explosion-proof impact, including absorbing energy layer, truss-like resistance to compression layer and cellular tensile layer.
The honeycomb fashion tensile layer includes honeycomb, and fill concrete in the honeycomb forms structural base mould
Plate.
The truss-like resistance to compression layer includes truss structure；The truss structure is welded on composition monoblock type mould on honeycomb
Hardened structure；15cm height above mandril of the casting concrete to truss structure, forms the structure surface layer above the honeycomb.
The structure topping laying absorbing energy layer of the truss-like resistance to compression layer.
The absorbing energy layer main function is energy-absorbing buffering.It is produced after absorbing impact, explosion by the large deformation of material itself
Raw energy blocks the shock wave with extremely strong destruction.The material of absorbing energy layer can use polyurethane foam, foamed aluminium, foam
The foamed materials such as concrete.Thickness can define according to demand.
Truss-like resistance to compression layer main function is resistance to compression load, is primarily subjected to impact, the pressure wave that explosion generates.Dot matrix truss
It is formed using reinforcement fabrication, bar diameter can be selected according to the size of pressure wave.Point purlin structural detail figure as shown in Fig. 2,
And point purlin structure can be sized with the need or thickness.The outer fiberfill fibers concrete of the truss structure, the fiber concrete material
Fiber in material uses steel fibre, stainless steel fibre, carbon fiber, basalt fibre, glass fibre, polyethylene fibre, polypropylene
One or more of fiber, vinal, aramid fiber.
Fill concrete inside cellular tensile layer, main function are tension loads and prevent structure back concrete from bursting apart
Caused by secondary injury.In the honeycomb fill microlith aggregate fiber concrete, the microlith aggregate fiber concrete it is thin
Stone aggregate is natural rubble, and particle size range is 8 ~ 25mm；Fiber is fine using steel fibre, stainless steel fibre, carbon fiber, basalt
One or more of dimension, glass fibre, polyethylene fibre, polypropylene fibre, vinal, aramid fiber.
The honeycomb hole cross sectional shape of the honeycomb is regular polygon or irregular polygon, honeycomb hole pore wall thickness
It is the 1/100 to 1/10 of honeycomb unit cell side length.
The circumradius r of the single Cellular structure of honeycomb, the thickness L of integral honeycomb structure, can be according to impact force
The size of degree carries out customized.As shown in Figure 1, honeycomb is two honeycomb holes and a spaced composition of honeycomb hole, bee
The height ratio of the height with a thickness of two honeycomb holes of nest structure, honeycomb and truss structure is 1:2 ~ 1:5.
Multiple shear keies are provided in each honeycomb slot of the honeycomb upper surface, the spacing of shear key is honeycomb
2 times to 5 times of unit cell side length.Shear key is set for guaranteeing the two-way collaboration between truss-like resistance to compression layer and cellular tensile layer
Deformation.
The material of the honeycomb and truss structure is mild steel or high ductile alloy steel.
This purlin honeycomb fashion composite protection structure can be applied to the wall body structure of important building, such as military correlation is built
Build the protection of object, such as military commanding center；Applied to nuclear power facility, civil air defense constructions and installations, it is allowed to from bomb in the attack of terrorism
It destroys.Be applied to explosion-proof industrial building, as chemical industry, petroleum, drug class production, storage during have explosion danger
Property workshop, once occur Explosive Energy people, object damage be preferably minimized.
The present invention has rational design, and the composite protection structure of explosion-proof impact is mainly by cellular tensile layer and dot matrix truss
Formula resistance to compression layer forms point purlin honeycomb fashion monoblock type safeguard structure by solder joint and fill concrete, and in surface layer additional foam energy-absorbing
Layer.The structure carries out innovative optimization to the Path of Force Transfer of shelter structure under detonation, can increase substantially anti-
The drag grade of protection structure improves structure ductility；And similar traditional coagulation is eliminated in the dispersion of broken concrete in energy restraining structure
The explosion shock collapse phenomenon of native safeguard structure.
Detailed description of the invention
Fig. 1 shows the schematic cross-sections of composite protection structure of the present invention.
Fig. 2 indicates the stereochemical structure signal of truss-like resistance to compression layer and cellular tensile layer in composite protection structure of the present invention
Figure.
In figure: 1- honeycomb fashion tensile layer, 2- truss-like resistance to compression layer, 3- absorbing energy layer.
Specific embodiment
Specific embodiments of the present invention are described in detail below.
The design requirement of explosion impact energy rank, and the reason based on blast impulse can be resisted according to composite protection structure
By parameters such as material, the number of plies and each thickness degree ratios for calculating and testing the determining safeguard structure of test, and structure is carried out excellent
Change design.
Embodiment 1
A kind of novel point purlin honeycomb fashion concrete composite protection structure, including absorbing energy layer 3, truss-like resistance to compression layer 2 and honeycomb
Formula tensile layer 1.
Cellular tensile layer 1 includes honeycomb, and fill concrete in honeycomb forms structural base template.
Truss-like resistance to compression layer 2 includes truss structure；Truss structure is welded on composition monoblock type formwork structure on honeycomb；
The 15cm height above mandril of the casting concrete to truss structure above the honeycomb.
The structure topping laying absorbing energy layer 3 of truss-like resistance to compression layer 2.
When it is implemented, absorbing energy layer is foamed aluminium material, with a thickness of 20mm.
Truss-like resistance to compression layer is dot matrix truss structure, truss depth 120mm, bar diameter C10, inside filling intensity
Grade is the glass reinforced concrete glass of C40.
Cellular tensile layer is hexahedron honeycomb, and thickness (two cell element height) is 100mm, inside filling intensity etc.
Grade is the microlith aggregate glass reinforced concrete glass of C30.
Embodiment 2
A kind of novel point purlin honeycomb fashion concrete composite protection structure, including absorbing energy layer 3, truss-like resistance to compression layer 2 and honeycomb
Formula tensile layer 1.
Cellular tensile layer 1 includes honeycomb, and fill concrete in honeycomb forms structural base template.
Truss-like resistance to compression layer 2 includes truss structure；Truss structure is welded on composition monoblock type formwork structure on honeycomb；
The 15cm height above mandril of the casting concrete to truss structure above the honeycomb.
The structure topping laying absorbing energy layer 3 of truss-like resistance to compression layer 2.
When it is implemented, absorbing energy layer is foamed concrete material, with a thickness of 10mm.
Truss-like resistance to compression layer is dot matrix truss structure, truss depth 150mm, bar diameter C22, inside filling intensity
Grade is the Basalt fiber concrete of C60.
Cellular tensile layer is hexahedron honeycomb, and thickness (two cell element height) is 120mm, inside filling intensity etc.
Grade is the microlith aggregate steel fiber reinforced concrete of C60.
Embodiment 3
A kind of novel point purlin honeycomb fashion concrete composite protection structure, including absorbing energy layer 3, truss-like resistance to compression layer 2 and honeycomb
Formula tensile layer 1.
Cellular tensile layer 1 includes honeycomb, and fill concrete in honeycomb forms structural base template.
Truss-like resistance to compression layer 2 includes truss structure；Truss structure is welded on composition monoblock type formwork structure on honeycomb；
The 15cm height above mandril of the casting concrete to truss structure above the honeycomb.
The structure topping laying absorbing energy layer 3 of truss-like resistance to compression layer 2.
When it is implemented, absorbing energy layer is foamed concrete material, with a thickness of 50mm.
Truss-like resistance to compression layer is point purlin structure, and point purlin height is 340mm, bar diameter C25, inside filling strength grade
For the steel fiber reinforced concrete of C60；
Cellular tensile layer is the double-deck hexahedron honeycomb, and for each layer with a thickness of 240mm, the double-deck tension honeycomb is vertical
Arranged crosswise, the microlith aggregate carbon fiber reinforced concrete that inside filling strength grade is C60.
The manufacturing process of composite protection structure is as follows in embodiment:
1, according to actual size demand, metal corrugated plate (the high-strength steel or metal alloy etc.) welding or pressure of equidimension are intercepted
Molding making honeycomb processed；
2, using reinforcement fabrication point purlin bracket, by purlin bracket being welded on honeycomb orderly；
3, it is connected at the top of point purlin using reinforcing bar；
4, concrete is poured into honeycomb pipe and is consolidated；
5, point purlin supporting structure layer casting concrete forms resistance to compression layer；
6, maintenance 3-5 days is completed；
7, resistance to compression layer top pours certain thickness foam concrete or pastes foamed aluminium board as buffering energy-absorbing layer.
Test: before practical application, a purlin honeycomb fashion shelter structure is optimized except through theoretical calculation
Design is outer, and the safeguard structure should be also constructed according to actual ratio, and PVDF piezoelectric transducer is pasted at the interface of layers of material,
Impact failure experiment is carried out to structure using high speed dynamic test instrument, tests the structure items capability of antidetonance index.By right
The dynamic impulsion of the structure emulates discovery, put the stress wave that explosion is generated in purlin honeycomb fashion concrete composite protection structure have compared with
Strong attenuation effect has good buffering energy-absorbing effect, improves the security performance of the structure of building, can meet civilian and national defence
Military requirement.
It should be pointed out that for the those skilled in the art of the art, without departing from the principle of the present invention,
Several improvement and application can also be made, these are improved and application is also considered as protection scope of the present invention.
Claims (8)
1. a kind of composite protection structure of explosion-proof impact, it is characterised in that: including absorbing energy layer (3), truss-like resistance to compression layer (2) and
Cellular tensile layer (1)；
The honeycomb fashion tensile layer (1) includes honeycomb, and fill concrete in the honeycomb forms structural base mould
Plate；
The truss-like resistance to compression layer (2) includes truss structure；The truss structure is welded on composition monoblock type mould on honeycomb
Hardened structure；The 15cm height above mandril of the casting concrete to truss structure above the honeycomb；
The structure topping laying absorbing energy layer (3) of the truss-like resistance to compression layer (2), the absorbing energy layer (3) is using polyurethane foam, bubble
Foam aluminium or foam concrete.
2. the composite protection structure of explosion-proof impact according to claim 1, it is characterised in that: filled out in the honeycomb
Fill microlith aggregate fiber concrete.
3. the composite protection structure of explosion-proof impact according to claim 1, it is characterised in that: filled out outside the truss structure
Fill fiber concrete.
4. the composite protection structure of explosion-proof impact according to claim 3, it is characterised in that: truss-like resistance to compression layer (2)
In fiber concrete material in fiber using steel fibre, stainless steel fibre, carbon fiber, basalt fibre, glass fibre, poly-
One or more of vinyl fiber, polypropylene fibre, vinal, aramid fiber.
5. the composite protection structure of explosion-proof impact according to claim 2, it is characterised in that: cellular tensile layer (1)
In microlith aggregate fiber concrete microlith aggregate be natural rubble, particle size range be 8 ~ 25mm；Fiber is using steel fibre, no
Become rusty steel fibre, carbon fiber, basalt fibre, glass fibre, polyethylene fibre, polypropylene fibre, vinal, aramid fiber fibre
One or more of dimension.
6. the composite protection structure of explosion-proof impact according to claim 1, it is characterised in that: table on the honeycomb
Multiple shear keies are provided in each honeycomb slot in face, the spacing of shear key is 2 times to 5 times of honeycomb unit cell side length.
7. the composite protection structure of explosion-proof impact according to claim 1, it is characterised in that: the bee of the honeycomb
Socket bore cross sectional shape be regular polygon or irregular polygon, honeycomb hole pore wall thickness be honeycomb unit cell side length 1/100 to
1/10。
8. the composite protection structure of explosion-proof impact according to claim 1, it is characterised in that: the honeycomb and purlin
The material of frame structure is mild steel or high ductile alloy steel.
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| CN109252442A (en) * | 2018-11-14 | 2019-01-22 | 青海大学 | A kind of energy-absorbing honeycomb aluminum Basalt fiber concrete block |
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| CN114412262A (en) * | 2022-02-14 | 2022-04-29 | 中国人民解放军军事科学院国防工程研究院 | Ultrahigh-strength fragmentation protection layer |
| CN114536888B (en) * | 2022-03-11 | 2023-06-30 | 太原理工大学 | Anti-penetration composite protective structure with ballistic deflection and preparation method thereof |
| CN117288606B (en) * | 2023-11-27 | 2024-01-23 | 太原理工大学 | Large impact load loading device |
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