CN103243819B - Assembly concrete post-girder steel energy-dissipating type nodal connection device - Google Patents
Assembly concrete post-girder steel energy-dissipating type nodal connection device Download PDFInfo
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Abstract
The invention discloses a kind of assembly concrete post-girder steel energy-dissipating type nodal connection device, be made up of beam beam bolt link and friction energy consuming device, comprise precast concrete column, pre-buried girder steel, middle girder steel and the steel part that is connected, the cross section of pre-buried girder steel and middle girder steel is H type, pre-buried girder steel is connected by web cover plate with the web of middle girder steel, and pre-buried girder steel connects by being connected cover plate with the edge of a wing of middle girder steel.Utilize the friction plate that combination steel part is included, by friction energy-dissipating mechanism dissipation seismic energy.Compared with prior art, the linkage in the present invention can reduce the adverse effect to floor; The beam hinge surrender mechanism of strong column and weak beam is realized by plastic hinge; Energy-dissipating device can improve fabricated construction power consumption, alleviates the damage of primary structural member; Connecting portion and girder steel can be changed and dismounting recycling by convenient for maintaining; Meanwhile, the present invention adopts entirely prefabricated industrialized standard to produce, and on-the-spot full bolt is installed, and has very strong engineering practicability.
Description
Technical field
The present invention relates to a kind of fully-prefabricated assembled combination frame structure, be specifically related to a kind of assembly concrete post-girder steel energy-dissipating type nodal connection device.
Background technology
For prefabricated assembled concrete frame construction, node often becomes link the weakest in total system with being connected.Because node connecting portion plays transmission in the frame, distributes the important function of internal force and guarantee structural integrity, it destroys and whole framework may be caused to lose bearing capacity, causes structural collapse.China's most area is in earthquake-prone region, fabricated construction node connection reliability is poor, be difficult to meet the performance requirement under geological process, it is comparatively large to repair difficulty after the shake of node area in addition, node and be connected the bottleneck thus becoming and restrict fabricated construction and use in earthquake zone.In the development of the prefabricated assembly structural system of a new generation, the research and development for beam column novel joint and connected mode have very important significance.
In traditional cast-in-place and assembling frame, structure consumes energy mainly through the plastic strain of self, and damaged and destruction brings difficulty to reparation and follow-up use, more and more can not adapt to the new demand of people to structural seismic performance.In recent years, develop on a large scale very much to adopt cushion technique that passive energy-consumption damper is representative to obtain.For fabricated construction system, existing research and development concentrate on node, deficiency researched and developed by the linkage relevant to fully-prefabricated assembled technique, the connection that exploitation damage is controlled, form the non-resilient reaction structure system of high damage threshold based on this, become the important channel that is improved node and structural system anti-seismic performance.For this reason, need a kind of novel energy-consumption assembling type node of research and development badly, make it have following characteristics:
1. use structures with semi-rigid joints, this node is rigidity in normal conditions of use, and under rarely occurred earthquake effect, can rotate according to reliable hysteretic characteristic, once rarely occurred earthquake stops, node shows as behavioral inelasticity again.
2., when suffering earthquake shock, can not increase owing to occurring during malformation beam-ends, disadvantageous drawing crack effect is produced to floor.In a lot of concrete and precast concrete framework, beam-ends increases and will have a negative impact, possible drawing crack floor, even owing to adding the antidetonation demand of coupled columns, thus may reduce the anti-fall performance of collapsing of structure.
3. the space requirement placing damping unit is that damper application needs issues that need special attention, need reduce the impact of damping unit on building using function as far as possible.
4. damage less under violent earthquake effect, in providing, after large shake can repair function.
5. plastic hinge can be realized.The newest research results of steel structure node shows, adopts the method for plastic hinge to improve ductility of joint, thus avoids column beam joint generation brittle fracture under severe earthquake action.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention proposes a kind of assembly concrete post-girder steel energy-dissipating type nodal connection device, rigidity during normal use, structure is made to have good energy dissipation capacity by the energy-dissipating device arranged at connecting portion, in providing, after large shake can repair function, thus ensure the resistance to overturning of structure and reduce the cost of repairing after calamity, among the assembling frame structure that can be widely used in earthquake zone.
Technical scheme: for solving the problems of the technologies described above, a kind of assembly concrete post-girder steel energy-dissipating type nodal connection device of the present invention, comprise precast concrete column, be embedded into precast concrete column and stretch out the pre-buried girder steel of precast concrete column cylinder and be connected the middle girder steel of pre-buried girder steel outward, the cross section of described pre-buried girder steel and middle girder steel is H type, pre-buried girder steel is connected by web cover plate with the web of middle girder steel, and pre-buried girder steel connects by being connected cover plate with the edge of a wing of middle girder steel.
Described connection cover plate comprises slotted hole connection cover plate and is connected cover plate with circular hole, and slotted hole connects cover plate and is provided with Long Circle hole, and circular hole connects cover plate and is provided with circular port; Described slotted hole connects cover plate and is provided with friction plate between pre-buried girder steel and middle girder steel; The outside of web cover plate is placed with web extra flap, is provided with web friction between web extra flap and web cover plate.
Described web cover plate is provided with circular port and Long Circle hole, and web cover plate is connected with pre-buried girder steel with the cooperation of circular port by bolt, and web cover plate is connected with middle girder steel by the cooperation of bolt with the circular port on top, the Long Circle hole of bottom; Described connection cover plate is provided with Long Circle hole or circular port, connects cover plate and is connected with pre-buried girder steel and middle girder steel respectively by the cooperation of bolt with Long Circle hole or circular port.
In the present invention, concrete column carries out prefabricated in factory, is wherein embedded into the pre-buried girder steel that a section is stretched out cylinder outward.What beam column adopted is the through connection of beam, prefabricate concrete column and pre-buried girder steel, after on-site hoisting is in place, adopt frictional high-strength bolts, connect cover plate and with friction plate, pre-buried for node area girder steel is connected with middle girder steel, precast concrete column and between adopt sleeve to starch anchor technology to be connected to form general frame structure.
The friction plate of brass or this kind of material of aluminium put into by above-mentioned pre-buried girder steel and middle girder steel between web and flange surfaces, by the prestressing force on frictional high-strength bolts, normal pressure perpendicular to rubbing surface is provided, when normally using, connection shows as rigidity, slippage hinge is formed, by Friction dissipation seismic energy under severe earthquake action.
It is relatively rotating of center of rotation that above-mentioned precast concrete column connecting portion is produced by the slippage of bottom flange place and web bottom bolts with top flange, thus reduces the drawing crack adverse effect to floor.
Above-mentioned pre-buried girder steel is connecting away from cylinder place employing frictional high-strength bolts, connection cover plate, by reasonably arranging bolt on connection cover plate, plastic hinge (slippage hinge) is controlled at connecting portion, thus not only make plastic hinge away from cylinder, significantly reduce the shearing suffered by joint cores, reduce for core space or cancel stirrup and create conditions, and turning power and the shear behavior of plastic hinge region can be improved, improve ductility and the energy dissipation capacity of plastic hinge region, finally realize the surrender energy consume mechanism of general frame strong column and weak beam.
In view of concrete frame being widely used in China, and the earthquake of frame joint is very general and the difficulty of reinforcement and repair is larger, meanwhile, building standardization, industrialization are the development trends of current industry, and therefore the present invention has positive social effect and scientific meaning.
Beneficial effect: compared with prior art, the present invention overcomes the deficiency of traditional assembly concrete and the through concrete column reinforcing joint of girder steel, emphasis solves the problem that the through Joint's connection fabrication of girder steel is complicated and consume energy, by damaging the rotational slip that controlled node connecting portion produces, the energy dissipation of ductility is provided, the node antidetonation principle of strong node, strong anchoring can be met, improve the damage threshold of structure, make primary structural member not damaged or damage very little.The present invention can obtain following excellent performance:
(1) adopt the passive energy-dissipating device that the friction plate of the material such as brass, aluminium flake is formed, after the repeatedly circulation of excessive deformation, still can provide stable non-resilient drag; In the elastic stage later stage, structure still ensures enough large anti-side rigidity, makes P-△ effect minimum; When external action diminishes, structure can recover enough rigidity again.
(2) shortening connecting length by arranging multilayer shearing friction face, reducing number of bolts, avoiding bolt fracture phenomenon.When frange plate ruptures, the axial action that the web bolt on the horizon of the contiguous edge of a wing can cause for beam moment of flexure provides horizontal Path of Force Transfer, under height rotation demand, still can keep rational bending resistance;
(3) by arranging the linkage of bottom flange multilayer slippage, not only reducing the impact of energy-dissipating device on building using function, and moving to top flange due to center of rotation, avoiding the common drawing crack to concrete floor and damage;
(4) plastic hinge moves from cylinder, thus reduces the damage to joint cores, easily realizes the beam hinge surrender mechanism of strong column and weak beam;
(5) girder steel and concrete column are after prefabrication, and scene adopts unjointed full bolt to connect, and Contraction in Site is few, is conducive to reducing human cost, accelerating construction progress and ensuring the quality of products, and make the expense of the low damage connection of fabrication and installation be connected close with tradition;
(6) in, under large shake effect, damagedly concentrate on energy-consuming parts and connecting portion, main body beam column component almost can not damage under the displacement level of design, and integral node can be avoided to lose efficacy, and connecting portion and girder steel can be changed and dismounting recycling by convenient for maintaining.
Accompanying drawing explanation
Fig. 1 is that the concrete frame joint after adopting apparatus of the present invention connects elevational schematic view;
Fig. 2 is the rotational deformation schematic diagram of embodiment 1 in the present invention;
Fig. 3 is the elevational schematic view of embodiment 2 in the present invention;
Fig. 4 is the elevational schematic view of embodiment 3 in the present invention;
Fig. 5 is the frame construction elevational schematic view after adopting apparatus of the present invention;
In figure: 1 precast concrete column; 2 Belleville packing rings; 3 middle girder steels; 4 pre-buried girder steels; 5 high-strength bolts; 6 circular holes connect cover plate; 7 slotted holes connect cover plate; 8 web cover plates; 9 friction plates; 10 web extra flap; 11 Long Circle holes; 12 circular ports; 13 high-strength friction-type bolts; 14 web friction plates.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Fig. 1 to 5, assembly concrete post of the present invention-girder steel energy-dissipating type nodal connection device, comprise precast concrete column 1, be embedded into precast concrete column 1 and stretch out the pre-buried girder steel 4 of precast concrete column 1 cylinder and the middle girder steel 3 being connected pre-buried girder steel 4 outward, the cross section of described pre-buried girder steel 4 and middle girder steel 3 is H type, pre-buried girder steel 4 is connected by web cover plate 8 with the web of middle girder steel 3, and pre-buried girder steel 4 connects by being connected cover plate with the edge of a wing of middle girder steel 3.
Wherein, connection cover plate comprises slotted hole connection cover plate 7 and is connected cover plate 6 with circular hole, and slotted hole connects cover plate 7 and is provided with Long Circle hole 11, and circular hole connects cover plate 6 and is provided with circular port 12; Slotted hole connects cover plate 7 and is provided with friction plate 9 between pre-buried girder steel 4 and middle girder steel 3; The outside of web cover plate 8 is placed with web extra flap 10, is provided with web friction plate 14 between web cover plate 8 and web extra flap 10; Web cover plate 8 is provided with circular port 12 and Long Circle hole 11, and web cover plate 8 is connected with pre-buried girder steel 4 with the cooperation of circular port 12 by bolt, and web cover plate 8 is connected with middle girder steel 3 by the cooperation of bolt with the circular port 12 on top, the Long Circle hole 11 of bottom; Connect cover plate and be provided with Long Circle hole 11 or circular port 12, connect cover plate and be connected with pre-buried girder steel 4 and middle girder steel 3 respectively by the cooperation of bolt with Long Circle hole 11 or circular port 12.Connection cover plate comprises circular hole connection cover plate 6 and is connected cover plate 7 with slotted hole; Bolt comprises high-strength bolt 5 and high-strength friction-type bolt 13.
Specifically, assembly concrete post of the present invention-girder steel energy-dissipating type nodal connection device is primarily of beam beam bolt link and friction energy consuming device two parts composition.As shown in Figure 1, comprise precast concrete column 1, middle girder steel 3, overhanging pre-buried girder steel 4, high-strength bolt 5, circular hole connects cover plate 6, slotted hole connects cover plate 7, web cover plate 8, friction plate 9, web extra flap 10, high-strength friction-type bolt 13, web friction plate 14, wherein high-strength bolt 5 and high-strength friction-type bolt 13 is equipped with Belleville packing ring 2.
Pre-buried girder steel 4 to be embedded in precast concrete column 1 and to stretch out the cylinder of precast concrete column 1, and between pre-buried girder steel 4 and middle girder steel 3, leave space, middle girder steel 3 is placed circular hole with the top of pre-buried girder steel 4 termination and is connected cover plate 6; Web cover plate 8 is placed in web both sides or the side of middle girder steel 3 and pre-buried girder steel 4, and web extra flap 10 is placed in the outside of web cover plate 8; Slotted hole connects cover plate 7 and is placed on the below upper of middle girder steel 3 and pre-buried girder steel 4 bottom flange respectively.Middle girder steel 3 is connected by high-strength bolt 5 with web place with the top flange of pre-buried girder steel 4, high-strength friction-type bolt 13 is installed in the bottom flange and web extra flap 10 of middle girder steel 3 and pre-buried girder steel 4 and is connected.Circular port 12 all offered by the top flange adopting high-strength bolt 5 to connect and web, offers Long Circle hole 11 at the bottom flange place of the web extra flap 10 adopting high-strength friction-type bolt 13 to connect and middle girder steel 3, pre-buried girder steel 4.
Assembly concrete post of the present invention-girder steel energy-dissipating type nodal connection device, be prepared from by following steps: first make precast concrete column 1 and middle girder steel 3 at pre-fabricated factory, be prefabricated in the factory concrete column 1 time pre-buried girder steel 4 and post concrete one-time-concreting are completed, the longitudinal reinforcement of every root precast concrete column 1 stretches out from capital, reserved slurry anchor sleeve at the bottom of post.After prefabricated post transports to job site, adopt slurry anchor mode to complete the connection of lower prop, the vertical muscle that namely hoisting prefabricated concrete column 1 makes lower prop stretch out is aimed at and is inserted its slurry anchor sleeve, is in the milk after the rectify perpendicular of post to slurry anchor sleeve.
Each beam-to-column joint position is formed friction energy consuming device to combine steel part, energy-consuming parts comprises the bottom wing listrium of middle girder steel 3, pre-buried girder steel 4, slotted hole connects cover plate 7, web extra flap 10 and friction plate 9, web friction plate 14, frictional high-strength bolts 13 and supporting spring washer.Wherein slotted hole connects cover plate 7 totally four pieces, is separately positioned on the upper and lower limit of middle girder steel 3 and pre-buried girder steel 4 bottom flange; Web extra flap 10 totally two pieces, is symmetricly set on steel beam web plate both sides; Four pieces of friction plates 9 are arranged on middle girder steel 3, the bottom flange of pre-buried girder steel 4 and slotted hole and connect between cover plate 7, are attached to the inner side that slotted hole connects cover plate 7; Two pieces of web friction plates 14 are identical with the planar dimension of web extra flap 10, are arranged between web cover plate 8 and web extra flap 10, are attached to the inner side of web extra flap 10; Frictional high-strength bolts 13 is fixed together comprising middle girder steel 3 with each parts of pre-buried girder steel 4 at the scene.By the prestressing force on frictional high-strength bolts 13, normal pressure perpendicular to rubbing surface is provided, when beam-to-column joint position produces relative displacement under severe earthquake action, the contact surface of friction plate 9, web friction plate 14 and girder steel bottom flange and web cover plate 8 will by Friction dissipation seismic energy.
Namely prefabricated beam column forms overall combination frame structure after completing assembly connection by high-strength bolt 5 and high-strength friction-type bolt 13.
According to the difference of friction energy consuming device set-up mode, assembly concrete post of the present invention-girder steel energy-dissipating type nodal connection device can be divided into three kinds of different performances.
Embodiment 1:
The present embodiment is asymmetrical friction connected mode.Type of attachment as shown in Figure 1, friction plate 9 is only arranged on bottom flange place, and web friction plate 14 is arranged on the web place near bottom flange, and friction plate 9, web friction plate 14 lay respectively at the inner side that slotted hole connects cover plate 7 and web extra flap 10.Node shows as behavioral inelasticity when normal use, under macroseism, beam column connecting portion is produced by the slippage of friction-type bolt 13 high-strength bottom bottom flange place and web with top flange is relatively rotating of center of rotation, as shown in Figure 2, thus the impact that can reduce floor.During the contact surface generation slippage of friction plate 9 and girder steel bottom flange and web cover plate 8, by Friction dissipation seismic energy, form slippage hinge.By arranging beam-ends gap, offering Long Circle hole 11 and meeting the requirement of node to turning power.
Embodiment 2:
The present embodiment is symmetrical frictional connection mode.As shown in Figure 3, be symmetrical arranged slotted hole in upper bottom flange and connect cover plate 7, between slotted hole connection cover plate 7 and upper bottom flange, friction plate 9 is set respectively, friction plate 9 is positioned at the inner side that slotted hole connects cover plate 7, the bolt hole connecting cover plate is Long Circle hole 11, the bolt hole that web cover plate 8 is connected with pre-buried girder steel 4 is opened as circular port 12, and the bolt hole that web cover plate is connected with middle girder steel 3 is opened as Long Circle hole 11.
Embodiment 3:
The present embodiment is without friction plate connected mode.As shown in Figure 4, be symmetrical arranged circular hole connect cover plate 6 in upper bottom flange, but do not establish friction plate between circular hole connection cover plate 6 and the edge of a wing, web place does not establish web extra flap 10 and web friction plate 14 yet.Circular port 12 all offered by the edge of a wing and web, adopts high-strength bolt 5 to connect, form the connection close to rigidity.
In sum, assembly concrete post of the present invention-girder steel energy-dissipating type nodal connection device, primarily of beam beam bolt link and friction energy consuming device two parts composition.The present invention is intended to develop the linkage with fully-prefabricated assembled process matching, reduces the adverse effect to floor, improves the energy dissipation capacity of fabricated construction.Precast concrete column 1 is undertaken prefabricated by factory, node adopts beam through, the pre-buried girder steel 4 stretched out by cylinder and middle girder steel 3 by being connected cover plate and high-strength bolt connects, respectively arrange friction plate 9 and web friction plate 14 at web extra flap 10 place of bottom flange and close bottom flange at the edge of a wing and web place.It is relatively rotating of center of rotation that beam-to-column joint position is produced by the slippage of bottom flange place and web bottom bolts with top flange, thus reduces impact that is stressed on floor and that use.Slippage hinge is formed, by friction energy-dissipating mechanism dissipation seismic energy during the contact surface generation slippage of friction plate 9 and girder steel bottom flange and web friction plate 14 and web cover plate 8.Compared with prior art, in the present invention, node shows as behavioral inelasticity when normal use; Friction energy consuming device provides good energy dissipation capacity; Plastic hinge easily realizes the beam hinge surrender mechanism of strong column and weak beam; Damagedly concentrate on dissipative cell and connecting portion, can alleviate the damage of the main members such as beam column, connecting portion and girder steel can be changed and dismounting recycling by convenient for maintaining.Assembly concrete post of the present invention-girder steel energy-dissipating type nodal connection device adopts entirely prefabricated industrialized standard to produce, and on-the-spot full bolt is installed, and construct workable, joint structure is simple, has very strong engineering practicability.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. assembly concrete post-girder steel energy-dissipating type nodal connection device, it is characterized in that: comprise precast concrete column (1), be embedded into precast concrete column (1) and stretch out the pre-buried girder steel (4) of precast concrete column (1) cylinder outward and be connected the middle girder steel (3) of pre-buried girder steel (4), the cross section of described pre-buried girder steel (4) and middle girder steel (3) is H type, pre-buried girder steel (4) is connected by web cover plate (8) with the web of middle girder steel (3), pre-buried girder steel (4) connects by being connected cover plate with the edge of a wing of middle girder steel (3), it is relatively rotating of center of rotation that precast concrete column (1) connecting portion is produced by the slippage of bottom flange place and web bottom bolts with top flange.
2. assembly concrete post according to claim 1-girder steel energy-dissipating type nodal connection device, it is characterized in that: described connection cover plate comprises slotted hole connection cover plate (7) and is connected cover plate (6) with circular hole, slotted hole connects cover plate (7) and is provided with Long Circle hole (11), and circular hole connects cover plate (6) and is provided with circular port (12); Described slotted hole connects cover plate (7) and is provided with friction plate (9) between pre-buried girder steel (4) and middle girder steel (3).
3. assembly concrete post according to claim 1-girder steel energy-dissipating type nodal connection device, it is characterized in that: the outside of described web cover plate (8) is placed with web extra flap (10), is provided with web friction plate (14) between web extra flap (10) and web cover plate (8).
4. assembly concrete post according to claim 1-girder steel energy-dissipating type nodal connection device, is characterized in that: described web cover plate (8) is provided with circular port (12) and Long Circle hole (11); Web cover plate (8) is connected with pre-buried girder steel (4) with the cooperation of circular port (12) by bolt; Web cover plate (8) to be coordinated with the circular port (12) on top, the Long Circle hole (11) of bottom by bolt and is connected with middle girder steel (3).
5. assembly concrete post according to claim 2-girder steel energy-dissipating type nodal connection device, is characterized in that: described slotted hole is connected cover plate (7) and is connected with pre-buried girder steel (4) and middle girder steel (3) respectively with the cooperation of Long Circle hole (11) by bolt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310203024.2A CN103243819B (en) | 2013-05-27 | 2013-05-27 | Assembly concrete post-girder steel energy-dissipating type nodal connection device |
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| CN201310203024.2A CN103243819B (en) | 2013-05-27 | 2013-05-27 | Assembly concrete post-girder steel energy-dissipating type nodal connection device |
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| CN103243819B true CN103243819B (en) | 2015-07-29 |
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Effective date of registration: 20200429 Address after: 215634 south side of Zhonghua Road, Jingang town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: Jiangsu Defeng Construction Group Construction Technology Co., Ltd Address before: 212003, No. 2, Mengxi Road, Zhenjiang, Jiangsu Patentee before: JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY |