CN108894321A - Quadrate steel pipe column-K shape bracing members the connecting node and construction method of T-steel connection - Google Patents
Quadrate steel pipe column-K shape bracing members the connecting node and construction method of T-steel connection Download PDFInfo
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- CN108894321A CN108894321A CN201810818387.XA CN201810818387A CN108894321A CN 108894321 A CN108894321 A CN 108894321A CN 201810818387 A CN201810818387 A CN 201810818387A CN 108894321 A CN108894321 A CN 108894321A
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2406—Connection nodes
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Abstract
The invention discloses the quadrate steel pipe column-K shape bracing members connecting nodes and construction method of a kind of connection of T-steel, it is supported including I-steel, the end of the I-steel support is fixedly connected with support plate, the other end of the support plate is fixedly connected with connecting plate, the connecting plate is fixedly connected with T-steel connector, and the T-steel connector is fixedly connected with quadrate steel pipe column.The present invention is connected using one-way bolt with high-strength bolt, can guarantee that connection is safe and reliable, and scene is without welding, a possibility that being also more convenient the reparation and replacement of T-steel connector, provide and increase node repair ability, reduce cost, improve sustainable use.Rehabilitation cost after expensive shake is preferably minimized.To meet steel building industrialization, the requirement of assembling.
Description
Technical field：
The invention patent relates to building structure interconnection technique fields, and in particular to the quadrate steel pipe column-K shape steel of T-steel connection
Support connecting node and construction method.
Background technique：
Assembling type steel structure builds the fast development for pushing building industry, because its is easy for installation, resource is renewable
It the advantages such as utilizes, is known as being a kind of environmentally protective building structure mode, is the research that China will realize industrialized development from now on
Direction.
Assembling type steel structure house then has the following advantages that：1. steel construction energy conservation and environmental protection.Steel are recyclable to be recycled；2. resisting
Shock stability is good.Geological process can be effectively reduced in steel construction high-strength light；3. industrialization degree is high.Steel construction major part component exists
It produces and completes in factory, conducive to realizing China to the demand for development of industrialized building；4. construction pollution is small.Component produces in work
Prefabricated completion in factory, on-site hoisting, connection；5. space layout is flexible and convenient.
Steel frame-Bracing Systems are one of the primary structure forms of current steel building research, which has
The advantages such as structure flexible arrangement, anti-side rigidity is big, and structure Path of Force Transfer is reasonable, and anti-seismic performance is good, thus at home and abroad in engineering
It is widely used.At present between bracing members and Steel Frame Column, most common connection type be mostly by cantilever lever or
Gusset plate connection, wherein support and cantilever lever or gusset plate be using welding or be bolted, cantilever lever or gusset plate and steel frame
Column passes through welded connecting.If I-steel support and the cantilever lever of same cross-sectional are connected by screw bolts, cantilever lever and column welding connect
It connects；I-steel support and the cantilever lever of same cross-sectional are welded to connect using welded connecting, cantilever lever and column；I-steel support
It is connect with the cantilever lever of same cross-sectional, cantilever lever and column are welded to connect, and are connected by screw bolts with diagonal brace web, are adopted with the diagonal brace edge of a wing
With welded connecting；I-steel support is connected by screw bolts with gusset plate, gusset plate and column welded connecting etc..
Although above several connection types are more common, there are some problems.The globality of this node is fine, constraint
Ability is stronger, can reduce the computational length of knighthead to a certain extent, also has certain contribution to the overall stiffness of structure,
In China's civil buildings, such node is all used substantially.But there is stronger restriction ability just because of this node, make to prop up
Support will generate parasitic moment when unstability occurs at node, and only design of node does not bring trouble, and will affect support
Low-cycle fatigue life.It is also simultaneously production, construction brings certain trouble with installation.Often because of node section institute when construction
The installation of structure is taken up too much space and influences, it is not only time-consuming but also uneconomical.
In addition, the connection of cantilever lever or gusset plate and Steel Frame Column is that the welding used connects in above several connection types
Mode is connect, the edge at two member welding joints can generate identical internal force and deformation under external force, and bonding strength is poor, uses
Steel amount is larger and construction speed is slow, accordingly, it is desirable to provide a kind of new Joining Structure, avoids carrying out site welding work, really
Realize overall assembled structure.
Patent of invention content：
Quadrate steel pipe column-K shape bracing members the connecting node and construction party that the purpose of the invention patent is connected there is provided T-steel
Method.
To achieve the above object, the invention patent uses following technical scheme：
Quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection, including I-steel support 1, the I-steel
The end of support 1 and the side of support plate 2 are affixed, and the other side of the support plate 2 is connect with 3 one end of connecting plate, the connection
Plate 3 is connect with T-steel connector 4, and the T-steel connector 4 is connect with quadrate steel pipe column 5.
Preferably, the T-steel connector 4 includes one end and the web 4- of edge of a wing 4-1 and web 4-2, the edge of a wing 4-1
2 side is mutually connected vertically.
Preferably, through-hole there are four opening up on the connecting plate 3, the upper and lower position web 4-2 of T-steel connector 4 is opened
Equipped with four through-holes corresponding with connecting plate 3, high-strength bolt 6 passes through through-hole and is fixedly connected with connecting plate 3 with T-steel connector 4,
Angle between two connecting plates 3 is 30 °~60 °.
Preferably, the quadrate steel pipe column 5 offers corresponding six through-holes with the edge of a wing 4-1 of T-steel connector 4, unidirectionally
Bolt 7 passes through through-hole and is fixedly connected with T-steel connector 4 with quadrate steel pipe column 5.
Preferably, the center for the first exhausting hole that the web 4-2 of the T-steel connector 4 is opened up connects apart from T-steel
The web 4-2 edge length L2 of fitting 4 is more than or equal to 28mm, the center of the first exhausting hole opened up on the connecting plate 3
Length L1 apart from 3 edge of connecting plate is more than or equal to 28mm.
Preferably, 6 diameter of high-strength bolt is 12-30mm.
Preferably, the one-way bolt 7 is at least six, diameter 12-30mm.
Preferably, the through-hole diameter opened up on the connecting plate 3 and the web 4-2 of T-steel connector 4 is equal, is 14-
32mm。
Preferably, it is equal that the diameter of through-hole is opened up on the quadrate steel pipe column 5 and the edge of a wing 4-1 of T-steel connector 4, is
14-32mm。
The construction method of the quadrate steel pipe column-K shape bracing members connecting node of T-steel connection, specific step is as follows：
Step 1：Support plate 2 is welded on to the end of I-steel support 1 in factory, four are opened up on connecting plate 3
The connecting plate 3 is welded on the end of support plate 2 by through-hole, respectively opens up four in the two sides web 4-2 or more of T-steel connector 4
A through-hole, while six through-holes are opened up on the edge of a wing 4-1 of T-steel connector 4, by web 4-2 fixed company vertical with edge of a wing 4-1
It connects, six through-holes is opened up on quadrate steel pipe column 5, the through-hole is corresponding with the edge of a wing 4-1 lead to the hole site of T-steel connector 4, and diameter
It is identical, it is transported to construction site；
Step 2：The through-hole opened on the edge of a wing 4-1 and quadrate steel pipe column 5 of T-steel connector 4 is passed through by one-way bolt 7, is made
T-type connector 4 is fixedly connected with quadrate steel pipe column 5, and the web 4-2 of connecting plate 3 and T-steel connector 4 is passed through by high-strength bolt 6
On the through-hole that opens up, be fixedly connected with T-steel connector 4 with connecting plate 3.
Quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection of the present invention and the beneficial effect of construction method：Node
Power transmission is clear, structural form is simple, and component is easy to make and facilitate construction, it is easy to accomplish standardization, modularization production, and root
Reasonable design and arrangement are carried out according to construction specific requirement, main structure deformation can either be well adapted to, guarantee connection safety
Reliably, but can saving steel, thus meet steel building industrialization, the requirement of assembling.Structure produces under permanent deformation
Raw component damage usually requires to carry out expensive reparation, connects more convenient T-steel connection with high-strength bolt using one-way bolt
A possibility that reparation and replacement of part provide and increase node repair ability, reduce cost, improve sustainable use.It will be expensive
Shake after rehabilitation cost be preferably minimized.
It is easy, quick to be bolted site operation, but when carrying out the connection of some closed sections, no image of Buddha opening section that
Sample is easily operated on bolt both sides, tightens bolt.Blind bolt can be complete under the premise of not destroying other positions of steel pipe
At being bolted, the problem of conventional stud connection is unable to both sides operation can be evaded and reduce welding capacity as far as possible, thus
Construction volume and labour cost are saved, has the characteristics that site operation is simple and convenient, welding capacity is minimum.Meanwhile under certain condition its
Mechanical property can accomplish to compare favourably with traditional high-strength bolt, be highly suitable for the connection of square steel tube structure.
Detailed description of the invention：
Fig. 1 is quadrate steel pipe column-K shape bracing members connecting node structural schematic diagram of T-steel connection；
Fig. 2 is quadrate steel pipe column-K shape bracing members connecting node side schematic view of T-steel connection；
Fig. 3 is quadrate steel pipe column-K shape bracing members connecting node partial structural diagram of T-steel connection；
Fig. 4 is the length signal for the first row through hole center positional distance web edge that the web of T-steel connector opens up
Figure；
Length schematic diagram of the first row through hole center opened up on Fig. 5 connecting plate apart from connecting plate edge.
Fig. 6 is quadrate steel pipe column sectional view in embodiment two；
Fig. 7 is I-steel supporting section figure in embodiment two；
Fig. 8 is connecting plate dimensional drawing in embodiment two；
Fig. 9 is T-steel flange dimensions in embodiment two；
Figure 10 is the web size of T-steel connector in embodiment two；
Figure 11 is Q345 steel constitutive model in embodiment two；
Figure 12 is bolt constitutive model in embodiment two；
Figure 13 is Q235 steel constitutive model in embodiment two；
Figure 14 is two interior joint grid dividing schematic diagram of embodiment；
Figure 15 is bolt grid dividing in embodiment two；
Figure 16 is the edge of a wing of T-steel connector and web grid dividing in embodiment two；
Figure 17 is that the web lattice of T-steel connector in embodiment two divide；
Figure 18 is that schematic diagram is arranged in boundary condition and loading scheme in embodiment two；
Figure 19 is data point schematic diagram in embodiment two；
Figure 20 is two interior joint A load(ing) point load-displacement curve figure of embodiment；
Figure 21 is two interior joint B load(ing) point load-displacement curve of embodiment；
Figure 22 is that two interior joint of embodiment loads pre-stress cloud charts；
Figure 23 is that moment each component stress cloud atlas is surrendered in embodiment two；
Figure 24 is ultimate bearing capacity moment each component stress cloud atlas in embodiment two；
Figure 25 is that two interior joint of embodiment destroys moment each component stress cloud atlas；
In figure：I-steel support -1, support plate -2, connecting plate -3, T-steel connector -4, quadrate steel pipe column -5, high-strength spiral shell
Bolt -6, one-way bolt -7, length-L1 of the first row through hole center opened up on connecting plate apart from connecting plate edge, T-steel web
On the length-L2, the edge of a wing -4-1, web -4-2 of the first row through hole center that opens up apart from web edge.
Specific embodiment：
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one：
With reference to Fig. 1-5, the quadrate steel pipe column-K shape bracing members connecting node of T-steel connection, including I-steel support 1, work
The top flange of font bracing members 1 and the side of support plate 2 are affixed, and the other side and 3 one end of connecting plate of the support plate 2 connect
It connects, connecting plate 3 is vertical with the web of I-steel support 1, the plate face of the connecting plate 3 and the web 4-2 of T-steel connector 4
Connection, the edge of a wing 4-1 of the T-steel connector 4 are connect with quadrate steel pipe column 5, edge of a wing one end 4-1 of T-steel connector 4 and web
The side of 4-2 is mutually connected vertically.
It is opened up on the connecting plate 3 there are four through-hole, the upper and lower position web 4-2 of T-steel connector 4 offers and connects
3 corresponding four through-holes of fishplate bar, high-strength bolt 6 pass through through-hole and are fixedly connected with connecting plate 3 with T-steel connector 4, two connections
Angle between plate 3 is 30 °~60 °.
The quadrate steel pipe column 5 offers corresponding six through-holes with the edge of a wing 4-1 of T-steel connector 4, and one-way bolt 7 is worn
It crosses through-hole and is fixedly connected with T-steel connector 4 with quadrate steel pipe column 5.
Web of the first row through hole center opened up on the web 4-2 of the T-steel connector 4 apart from T-steel connector 4
4-2 edge length is more than or equal to 28mm.
Length of the first row through hole center opened up on the connecting plate 3 apart from 3 edge of connecting plate is more than or equal to 28mm.
6 diameter of high-strength bolt is 12-30mm, and the diameter of the one-way bolt 7 is 12-30mm.
The through-hole diameter opened up on the connecting plate 3 and the web 4-2 of T-steel connector 4 is equal, the quadrate steel pipe column 5
It is equal with the diameter of through-hole is opened up on the edge of a wing 4-1 of T-steel connector 4, it is 14-32mm.
The one-way bolt 7 is at least six.
The construction method of the quadrate steel pipe column-K shape bracing members connecting node of T-steel connection, specific step is as follows：
Step 1：Support plate 2 is welded on to the end of I-steel support 1 in factory, four are opened up on connecting plate 3
The connecting plate 3 is welded on the end of support plate 2 by through-hole, respectively opens up four in the two sides web 4-2 or more of T-steel connector 4
A through-hole, while six through-holes are opened up on the edge of a wing 4-1 of T-steel connector 4, by web 4-2 fixed company vertical with edge of a wing 4-1
It connects, six through-holes is opened up on quadrate steel pipe column 5, the through-hole is corresponding with the edge of a wing 4-1 lead to the hole site of T-steel connector 4, and diameter
It is identical, it is transported to construction site；
Step 2：The through-hole opened on the edge of a wing 4-1 and quadrate steel pipe column 5 of T-steel connector 4 is passed through by one-way bolt 7, is made
T-type connector 4 is fixedly connected with quadrate steel pipe column 5, and the web 4-2 of connecting plate 3 and T-steel connector 4 is passed through by high-strength bolt 6
On the through-hole that opens up, be fixedly connected with T-steel connector 4 with connecting plate 3.
Embodiment two：
With reference to Fig. 1-5, in factory, by the top flange of the one side of the board weldering and I-steel support 1 of the support plate 2
Welding, during the welding process, pays attention to the influence of welding residual stress, should follow first single-sided welding, the rear principle for welding another side.
It also needs to check the welding quality of weld seam, while carrying out quality examination record.It is opened up in the plate face of the connecting plate 3
The length L1 of four through-holes, through-hole diameter 18mm, and the center of the first exhausting hole apart from 3 edge of connecting plate is 40mm,
One end of connecting plate 3 and the other side of the support plate 2 are welded, the I-steel is supported into 1, support plate 2, connecting plate 3
It is connected to one.Four through-holes are respectively opened up in the two sides up and down of the web 4-2 of the T-steel connector, through-hole diameter is
18mm, position is corresponding with four lead to the hole site of connecting plate 3, and the center of the first exhausting hole is apart from the edge web 4-2
Length L2 is 45mm, and six through-holes, through-hole diameter 22mm, by the wing are opened up on the edge of a wing 4-1 of the T-steel connector
Edge 4-1 and web 4-2 welds together composition T-steel connector 4, on the quadrate steel pipe column 5 with the T-steel connector 4
Edge of a wing 4-1 through-hole corresponding position opens up six through-holes of same diameter, transport to construction site.
At the construction field (site), the one-way bolt 7 that diameter is 20mm is passed through to the edge of a wing 4-1 and quadrate steel pipe column 5 of T-steel connector
On the through-hole that opens up, and tightened by spanner, the one-way bolt 7 locked, is fixed on the T-steel connector 4 described
On quadrate steel pipe column 5, the I-steel support 1 that two are welded with support plate 2 and connecting plate 3 is overlapped on T-steel connector respectively
At web 4-2 or more two, the angle between two connecting plates 3 is 30 °~60 °.Diameter is passed through into institute for the high-strength bolt 6 of 16mm
The through-hole opened up on the web 4-2 of connecting plate 3 and the T-steel connector is stated, and is tightened nut by spanner, by high-strength spiral shell
Bolt 6 is locked, and completion K shape bracing members are fixedly connected with quadrate steel pipe column.
Embodiment three：
Have using finite element analysis software ABAQUS to the quadrate steel pipe column-K shape bracing members connecting node that T-steel connects
Finite element analysis, analyzes load-displacement curve of such connecting node under Monotonic Load and analyzes the stress of each component and become
Change.Purpose is the stress performance whether verifying connecting node of the present invention can be realized anticipation.
In this node, quadrate steel pipe column 5 is connect with T-steel connector 4 by one-way bolt 7, and 7 diameter of one-way bolt is
20mm, T-steel connector 4 are connect with connecting plate 3 by 10.9 grades of M16 high-strength bolts, and connecting plate 3 and support plate 2 pass through welding
Connection, the detailed dimensions of each component such as Fig. 6-10.
1, the selection of material constitutive model：
The stress-strain relation of material uses bilinear pairings model in the present embodiment, and the yield criterion of material chooses Von
Mises yield criterion, the hardening rule select isotropism (Isotropic) the hardening rule, do not consider Bauschinger
(Bauschinger) effect.I-steel support 1 and support plate 2 use Q235 steel, quadrate steel pipe column 5, connecting plate 3 and T-steel
The edge of a wing 4-1 and web 4-2 of connector 4 use Q345 steel, and high-strength bolt 6 uses 10.9 grades of M16 high-strength bolts, unidirectional spiral shell
Bolt 7 uses 10.9 grades of M20 one-way bolts, and elastic modulus E takes 2.06 × 105MPa, Poisson's ratio take 0.3.Q235 steel, bolt with
And the strengthening segment straight slope of Q345 steel is respectively 0.01E, 0.05E, 0.01E (E is steel elasticity modulus), each material constitutive
Model such as Figure 11-13.
1 steel mechanics performance index of table
2, Unit selection and grid dividing：
The finite element analysis model of the quadrate steel pipe column-K shape bracing members connecting node of T-steel connection is made of 7 parts in total：
I-steel supports 1, support plate 2, connecting plate 3, high-strength bolt 6, T-steel connector 4, one-way bolt 7, quadrate steel pipe column 5.In order to
Simplifying and calculates, high-strength bolt 6 and one-way bolt 7 are all made of Holistic modeling, have ignored the influence of screw thread and bolt washer on bolt,
According to nodal analysis method feature, all components in finite element model select eight node hexahedron linear decrement integral units
(C3D8R) it simulates.It is only provided with thinner grid around nodes domains and bolt hole, guarantees the intermediate portions tool of finite element analysis
Standby higher precision.The grid dividing of nodal analysis method is as shown in figures 14-17.
3, the setting of model contact relation and constraint：
In order to which the contact before each component of quadrate steel pipe column-K shape bracing members connecting node of real simulation T-steel connection is closed
It is that following contact surface is provided in model：
(1) I-steel supports the end on 1 edge of a wing to be welded with support plate 2, and one end of connecting plate 3 is welded in support plate 2,
Binding constraints is all made of between I-steel support 1 and support plate 2, support plate 2 and connecting plate 3.
(2) I-steel support 1 passes through connecting plate 3 and T-steel connector 4 by high-strength bolt 6 with T-steel connector 4
Web 4-2 corresponding through-hole connection, on the through-hole wall, connecting plate 3 on the web 4-2 of high-strength bolt 6 and T-steel connector 4
Through-hole wall between setting have normal direction attribute plane-plane contact, be arranged between connecting plate 3 and the web 4-2 of T-steel connector 4
Tangentially, the plane-plane contact of normal direction attribute.
(3) by the through-hole that one-way bolt 7 passes through edge of a wing 4-1 and quadrate steel pipe column 5 make the edge of a wing 4-1 of T-steel connector 4 with
Quadrate steel pipe column 5 is fixed, and establishing between the nut of one-way bolt 7 and the edge of a wing 4-1 of T-steel connector 4 has tangential, normal direction attribute
Plane-plane contact, be arranged between the hole wall on the edge of a wing 4-1 of one-way bolt 7 and hole wall, T-steel connector 4 on quadrate steel pipe column 5
The plane-plane contact of normal direction attribute.
(4) tangential, normal direction attribute plane-plane contact is set between the edge of a wing 4-1 and quadrate steel pipe column 5 of T-steel connector 4.
(5) Rigid Constraints is arranged in lower section on 1 load end section of I-steel support, quadrate steel pipe column 5, prevents load(ing) point
Deformation, which occurs, in the face at place influences load application, guarantees its local stability.
Normal direction contact attribute is set as contacting (" Hard " contact) firmly.Contact pressure can be transmitted between contact surface, when
When contact pressure becomes " 0 " or negative value, separated between two contact surfaces；Tangential contact attribute is set as Coulomb friction, i.e., with rubbing
Coefficient μ is wiped to indicate the frictional behavior between contact surface, μ takes 0.35.
4, boundary condition and Protonation constant：
Pretightning force in high-strength bolt 6 and one-way bolt 7 is the necessary condition for guaranteeing effectively to connect between component, formal
Before load, the pretightning force and capital axle power of high-strength bolt 6 and one-way bolt 7, which need to apply in advance, to be finished.The present embodiment choosing
It selects using the method for applying bolt power (Bolt Force).The pretightning force acting surface of bolt is cross section in shank of bolt.To make
Model is easy convergence, applies pretightning force in two steps, applies in third step and completes (Fix at current length).For
The f of 10.9S boltu1140MPa is taken, the pretightning force of M20 bolt is 155kN in embodiment, and the pretightning force of M16 bolt is 100kN.
The convergence of the FEM calculation of exerting one's influence of boundary condition.Pass through release 5 apical axis of quadrate steel pipe column in the present embodiment
Line direction displacement freedom, simulates the boundary condition of column.Due to the mode for using displacement to load, then need by I-steel
1 end setting boundary condition is supported to realize, rotation, displacement freedom in release I-steel 1 end load plane of support, about
Beam I-steel supports the out-of-plane rotation of 1 end load and displacement, synchronous to upper and lower two sides I-steel support 1 to load, and protects
Card node is drawn a pressure stress by one simultaneously and suffered value of thrust is equal with pressure value.The perimeter strip of nodal finite element model
As shown in figure 18, wherein power controls for part and loading scheme setting：U1=U2=0, UR1=UR3=0；Bit andits control 1：U1=U2
=0, UR1=UR3=0；Bit andits control 2：U1=U2=0, UR1=UR3=0；Boundary condition：U1=U2=U3=0, UR1=
UR3=0.U1, U2, U3 respectively represent X, the displacement of the lines in tri- directions Y, Z, UR1, UR2, UR3It respectively represents around X, Y, tri- sides Z
To the corner of rotation.This displacement is represented equal to 0 or corner is 0.
5, the load-displacement curve of node:
Square tubular column-K shape bracing members the connecting node of T-steel connection, due to the complexity and steel and spiral shell of stress performance
The reasons such as collaborative work ability difference of the bolt in loading process take load(ing) point to make in the case where applying monodisplacement load
The loading process of node is analyzed for the data point of load-displacement curve, section of the research node in the different stress stages
Point performance.
The load Coupling point A for taking node compression-side shown in Figure 19 to support is data point, obtains load-displacement curve such as Figure 20
It is shown.The load Coupling point B for taking node tension side shown in Figure 19 to support is data point, obtains load-displacement curve such as Figure 21 institute
Show.It can be seen from the figure that bent by the load-displacement that node compression-side supporting loading point and tension side supporting loading point obtain
Line tendency is roughly the same, and the loading process of node is roughly divided into three phases：Elastic stage, elastic-plastic phase, failure stage.For
The stress condition and process for facilitating observation node mark O, B, C point on Figure 20 curve and mark O, E, F on Figure 21 curve
Point respectively represents the characteristic point of node compression-side and tension side three different stress stages.
(1) the OB section of Figure 20 and the OE section of Figure 21 correspond to the elastic stage of node, generally linear in this stage curve
Form.At A point and D point, the fluctuation of minimum amplitude occurs, this is because the initial time of load, I-steel supports 1 end
Connecting plate 3 and T-steel connector 4 web 4-2 between load transmitted by frictional force reach with continuing growing for load
When to threshold friction, there is different degrees of sliding in bolt, does not influence whole stress performance.B point and E point are in the wrong
It takes a little, node is surrendered at this moment, into elastic-plastic phase, yield displacement 5.156mm, the corresponding surrender of compression-side
Load is 588.802kN, and the corresponding yield load of tension side is 558.58kN.
(2) the BC section of Figure 20 and the EF section of Figure 21 correspond to the elastic-plastic phase of node.When being loaded into B point and E point
It waits, I-steel, which supports, to be started to generate modeling at the bolt hole of 4-2 on the connecting plate 3 of 1 end and the web of T-steel connector 4
Property deformation, as load is continuously increased, plastic deformation persistently increases, and the distribution of the web 4-2 upper stress of T-steel connector 4 is gradually
From bolt hole position to diffusion in the middle part of the web 4-2 of T-steel connector 4, I-steel supports 3 plasticity of connecting plate of 1 end to become
Shape is gradually increased.
(3) stage corresponds to the failure stage of node after the F of stage and Figure 21 point after the C point of Figure 20.Displacement load
When to C point and F point, the ultimate bearing capacity that node compression-side reaches is：908.1kN, the ultimate bearing capacity that node tension side reaches
For 848.08kN, I-steel supports the 3 bolt hole position of connecting plate of 1 end that total cross-section occurs and destroys, T-steel connector 4
Web 4-2 upper bolt hole position plastic deformation is obvious, and connection stiffness is degenerated.The C point of Figure 20 and the F point of Figure 21 correspond to node
Failing load.
6, the mechanical performance index of Monotonic Load lower node：
According to《Building aseismicity test method regulation》Calculation method in (JGJ/T 101-2015), obtains nodal analysis method
The performance indicators such as yield load, yield displacement, ductility factor.In nodal analysis method, I-steel supports 1, high-strength bolt 6, T-steel
The different components such as connector 4 use the steel of different surrender grades, and in loading procedure, there is no simultaneously for these components and steel
Reach yield strength, also without apparent yield point on the load-displacement curve of nodal analysis method.Using geometrograph
(Geometric Graphic Method) determines the yield load and yield displacement of node.The ductility of component or structure is usually adopted
It is indicated with ductility factor, the initial stiffness K of nodeiThe as load-displacement curve tangent line of crossing origin.According to obtained surrender
Bearing capacity Fy, yield displacement Δy, ultimate bearing capacity Fu, extreme displacement Δu, ductility factor and initial stiffness Ki, by data into one
Step processing, the mechanical property for obtaining node are shown in Table 2.
2 nodal finite element analogue data processing result of table
It can be seen from calculated result in table 2 node tension side it is close compared with the mechanical property that compression-side connects but still
There are some differences.From the data in the table, the yield displacement that connect with tension side of node compression-side connection is closer to, node by
Press the initial stiffness of side connection higher than the initial stiffness that tension side connects by about 47.7%；Surrender bearing capacity is high by about 5.4%, and the limit is held
Load power is high by about 7%, and the ductility factor of tension side and compression-side is close, and is all satisfied Ductility Requirement, has embodied good deformation
Ability.
7, the key area stress analysis of node
It is answered by the Mises that the Visualization module in ABAQUS finite element software extracts nodal finite element model
Power cloud atlas can observe the stress distribution and the rule of development in nodes domains each stress stage, so that the mode of transfer force to node has
Deeper into understanding.As shown in Figure 20 and Figure 21 according to the load-displacement curve of node, emphasis inquires into load initial stage elastic stage
(OB and OE sections), node surrender when (B point and E point), node calculation when (C point and F point) stress distribution situation.
(1) initial stage is loaded
The stress distribution cloud atlas of load initial stage each component, as shown in figure 22.The OB section of Figure 20 and the OE section node of Figure 21 are each
Component is in elastic stage, and after high-strength bolt 6 and 7 pretightning force of one-way bolt apply, nodes domains are in stressless shape
State only squeezes at the bolt hole that the edge of a wing 4-1, web 4-2 and I-steel of T-steel connector 4 support 1 end connecting plate 3
Generate stress.When end supported on both sides starts load, each connector of nodes domains gradually starts stress occur, and stress is more concentrated
Region be I-steel support at the bolt hole of 1 end connecting plate 3, at the bolt hole of the web 4-2 of T-steel connector 4 with
And the connection corner of web 4-2 and edge of a wing 4-1.
(2) yielding stage
With being pressurized, support and tension supporting base end portion continue to load, and node progressivelyes reach yield point (B point and E point), surrender
The stress distribution cloud atlas of moment each component, as shown in figure 23.The I-steel that load pre-stress is more concentrated supports 1 end to connect
Surrender is initially entered at fishplate bar and at the bolt hole of the web 4-2 of T-steel connector 4, and stress distribution region starts to branch
It is extended in the middle part of the middle part of the end connecting plate 3 of fagging 2, the web 4-2 of T-steel connector 4 with edge of a wing 4-1, T-steel connector 4
The edge of a wing part 4-1 stress distribution it is more uniform, connect for I-steel support 1 with the web 4-2 of T-steel connector 4
The stress of high-strength bolt is relatively large, will consequently reach surrender.Connect for the edge of a wing 4-1 of quadrate steel pipe column 5 and T-steel connector 4
The stress of the one-way bolt 7 connect is relatively small, is substantially at elastic stage.
(3) elastic-plastic phase
As load continues growing, reach the ultimate bearing capacity (C point and F point) of node, at this time each component stress distribution clouds
Figure is as shown in figure 24.I-steel supports the connecting plate 3 of 1 end to reach capacity first bearing capacity, and at 3 upper bolt hole of connecting plate
Stress expand to the Full connected face of connecting plate 3, support 1 end also to produce biggish stress in I-steel.T-steel connection
Stress diffuses to web 4-2 and the junction edge of a wing 4-1 along Impact direction at bolt hole on the web 4-2 of part 4, and makes T-type
The edge of a wing 4-1 of steel fastener 4 produces apparent plastic deformation, and the edge of a wing 4-1 upper bolt hole position of T-steel connector 4 generates
Apparent stress is concentrated.It is answered for I-steel support 1 with the web 4-2 of T-steel connector 4 high-strength bolt 6 connecting
Power is already close to ultimate strength.Stress for quadrate steel pipe column 5 and the edge of a wing 4-1 of T-steel connector 4 one-way bolt 7 connecting
It is also up to its yield strength.
(4) destruction of a node
Node, which reaches capacity, to be continued to load after bearing capacity, until node destroys, each component stress of node divides at this time
Cloth is as shown in figure 25.Destruction of a node form is that I-steel supports the connecting plate 3 of 1 end to reach failing load, while being used for work
Font bracing members 1 and the stress of the web 4-2 of T-steel connector 4 high-strength bolt 6 connecting reach capacity intensity.At this point, T-type
The edge of a wing 4-1 and web 4-2 weld of steel fastener 4 generate larger stress, and the edge of a wing 4-1 of T-steel connector 4 produces larger
Plastic deformation.It has also been reached for quadrate steel pipe column 5 with the stress of the edge of a wing 4-1 of T-steel connector 4 one-way bolt 7 connecting
To the ultimate strength of its material.It produces apparent stress at the bolt hole of 5 nodes domains part of quadrate steel pipe column to concentrate, quadrate steel pipe column
It is whole not generate obvious plastic deformation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
- Quadrate steel pipe column-K shape bracing members the connecting node of 1.T fashioned iron connection, including I-steel support (1), it is characterised in that：Institute The end for stating I-steel support (1) and the side of support plate (2) are affixed, the other side and connecting plate (3) of the support plate (2) One end connection, the connecting plate (3) connect with T-steel connector (4), and the T-steel connector (4) and quadrate steel pipe column (5) are even It connects.
- 2. quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection according to claim 1, which is characterized in that institute Stating T-steel connector (4) includes the edge of a wing (4-1) and web (4-2), one end and the side of web (4-2) of the edge of a wing (4-1) It is mutually connected vertically.
- 3. quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection according to claim 1, which is characterized in that institute Through-hole there are four opening up on connecting plate (3) is stated, upper and lower position web (4-2) of T-steel connector (4) offers and connecting plate (3) corresponding four through-holes, high-strength bolt (6) pass through through-hole and are fixedly connected with connecting plate (3) with T-steel connector (4), and two Angle between connecting plate (3) is 30 °~60 °.
- 4. quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection according to claim 2, which is characterized in that institute It states quadrate steel pipe column (5) and offers corresponding six through-holes with the edge of a wing (4-1) of T-steel connector (4), one-way bolt (7) passes through T-steel connector (4) is fixedly connected by through-hole with quadrate steel pipe column (5).
- 5. quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection according to claim 3, which is characterized in that institute State web of the center for the first exhausting hole that the webs (4-2) of T-steel connector (4) opens up apart from T-steel connector (4) (4-2) edge length (L2) is more than or equal to 28mm, and the center distance of the first exhausting hole opened up on the connecting plate (3) is even The length (L1) at fishplate bar (3) edge is more than or equal to 28mm.
- 6. quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection according to claim 3, which is characterized in that institute Stating high-strength bolt (6) diameter is 12-30mm.
- 7. quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection according to claim 4, which is characterized in that institute It states one-way bolt (7) and is at least six, diameter 12-30mm.
- 8. quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection according to claim 3, which is characterized in that institute It is equal to state the through-hole diameter opened up on the web (4-2) of connecting plate (3) and T-steel connector (4), is 14-32mm.
- 9. quadrate steel pipe column-K shape bracing members the connecting node of T-steel connection according to claim 4, which is characterized in that institute State opened up on the edge of a wing (4-1) of quadrate steel pipe column (5) and T-steel connector (4) through-hole diameter it is equal, be 14-32mm.
- 10. quadrate steel pipe column-K shape the bracing members of the connection of T-steel described in -9 any claim items connect section according to claim 1 The construction method of point, specific step is as follows：Step 1：Support plate (2) is welded on to the end of I-steel support (1) in factory, opens up four on connecting plate (3) The connecting plate (3) is welded on the end of support plate (2) by a through-hole, the web (4-2) up and down two in T-steel connector (4) Side respectively opens up four through-holes, while six through-holes are opened up on the edge of a wing of T-steel connector (4) (4-1), by web (4-2) with (4-1) is vertically fixedly connected on the edge of a wing, and six through-holes, the wing of the through-hole and T-steel connector (4) are opened up on quadrate steel pipe column (5) Edge (4-1) lead to the hole site is corresponding, and diameter is identical, is transported to construction site；Step 2：It is opened on the edge of a wing (4-1) of T-steel connector (4) and quadrate steel pipe column (5) by one-way bolt (7) logical Hole is fixedly connected with T-type connector (4) with quadrate steel pipe column (5), passes through connecting plate (3) by high-strength bolt (6) and T-steel connects The through-hole opened up on the web (4-2) of fitting (4), is fixedly connected with T-steel connector (4) with connecting plate (3).
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