CN103243819A - Fabricated concrete column-steel beam energy dissipation type panel point connecting device - Google Patents

Fabricated concrete column-steel beam energy dissipation type panel point connecting device Download PDF

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Publication number
CN103243819A
CN103243819A CN2013102030242A CN201310203024A CN103243819A CN 103243819 A CN103243819 A CN 103243819A CN 2013102030242 A CN2013102030242 A CN 2013102030242A CN 201310203024 A CN201310203024 A CN 201310203024A CN 103243819 A CN103243819 A CN 103243819A
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China
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girder steel
steel
cover plate
web
buried
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CN2013102030242A
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Chinese (zh)
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CN103243819B (en
Inventor
潘志宏
张义保
李爱群
周智彬
朱延章
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江苏科技大学
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Priority to CN201310203024.2A priority Critical patent/CN103243819B/en
Publication of CN103243819A publication Critical patent/CN103243819A/en
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Abstract

The invention discloses a fabricated concrete column-steel beam energy dissipation type panel point connecting device. The fabricated concrete column-steel beam energy dissipation type panel point connecting device is composed of a beam-beam bolt connection component and a friction energy dissipation device, and comprises a prefabricated concrete column, a pre-buried steel beam, a middle steel beam and a combination connection steel piece, wherein transversal surfaces of the pre-buried steel beam and the middle steel beam are both H-shaped, webs of the pre-buried steel beam and the middle steel beam are connected through a web cover plate, and flanges of the pre-buried steel beam and the middle steel beam are connected through a connection cover plate. Earthquake energy is dissipated by using friction plates attached inside a combination steel piece and through a friction energy dissipation mechanism. Compared with the prior art, the connecting device can reduce adverse effects on a floor and achieve a beam hinge yielding mechanism by moving a plastic hinge outward, the energy dissipation device can improve fabricated structure energy dissipation and reduce damages of main structural members, connection parts and the steel beams can be conveniently maintained, replaced and dismantled for reuse, and simultaneously, the fabricated concrete column-steel beam energy dissipation type panel point connecting device is produced by using a whole prefabricated industrialization standard, and installed only through bolts on site, and has strong engineering practicability.

Description

Assembly concrete post-girder steel energy-dissipating type nodal connection device
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 the weakest link in the total system with being connected.Because the node connecting portion plays transmission, distributes the important function of internal force and assurance structural integrity in framework, it destroys and may cause whole framework forfeiture bearing capacity, causes structural collapse.The most of area of China is in earthquake-prone region, fabricated construction node connection reliability is poor, be difficult to satisfy the performance requirement under the geological process, the reparation difficulty is bigger after the shake of node area in addition, and node restricts the bottleneck that fabricated construction uses in the earthquake zone with being connected thereby becoming.In the development of prefabricated assembly structural system of a new generation, have very important significance at the research and development of beam column novel joint and connected mode.
In traditional cast-in-place and assembling framework, structure mainly consumes energy by the plastic strain of self, and damaged and destruction brings difficulty for reparation and follow-up use, more and more can not adapt to people to the new demand of structural seismic performance.In recent years, be that the cushion technique of representative has obtained very great development to adopt passive energy-consumption damper.For the fabricated construction system, existing research and development concentrate on the node, the linkage research and development relevant with fully-prefabricated assembled technology are not enough, the connection that the exploitation damage is controlled, form the non-resilient reaction structure system of high damage threshold based on this, become an important channel of improving 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 semi-rigid node, this node is rigidity under regular service conditions, and under the rarely occurred earthquake effect, can rotate according to reliable hysteretic characteristic, in case rarely occurred earthquake stops, node shows as the rigidity behavior again.
2. when suffering earthquake shock, beam-ends takes place in the time of can be owing to malformation increase, floor is produced disadvantageous drawing crack effect.In a lot of concrete and precast concrete framework, beam-ends increases and will have a negative impact, possible drawing crack floor, even may be owing to increased the antidetonation demand of coupled columns, thereby the anti-performance of collapsing of reduction structure.
3. the space requirement of placing damping unit is that damper is used the problem that need pay close attention to, need reduce damping unit to the influence of building function of use as far as possible.
4. damage is less under the violent earthquake effect, but the repair function in providing, after the big shake.
5. can realize that plastic hinge moves outward.The newest research results of steel structure node shows that the method that adopts plastic hinge to move can improve node ductility, thereby avoids column beam joint generation brittle fracture under severe earthquake action outward.
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, be rigidity during normal the use, make structure have good energy dissipation capacity by the energy-dissipating device in the connecting portion setting, but the repair function in providing, after the big shake, thereby guarantee the resistance to overturning of structure and reduce the cost of repairing after the calamity, can be widely used among the assembling frame construction of earthquake zone.
Technical scheme: for solving the problems of the technologies described above, a kind of assembly concrete post of the present invention-girder steel energy-dissipating type nodal connection device, comprise precast concrete column, be embedded into precast concrete column and the outer pre-buried girder steel and the middle girder steel that is connected pre-buried girder steel that stretches out the precast concrete column cylinder, the cross section of described pre-buried girder steel and middle girder steel is the H type, the web of pre-buried girder steel and middle girder steel is connected by the web cover plate, and the edge of a wing of pre-buried girder steel and middle girder steel connects by being connected cover plate.
Described connection cover plate comprises that slotted hole connects cover plate and is connected cover plate with circular hole, and slotted hole connects cover plate and is provided with the Long Circle hole, and circular hole connects cover plate and is provided with circular port; Be provided with friction plate between described slotted hole connection cover plate and pre-buried girder steel and the middle girder steel; The outside of web cover plate is placed with the web extra flap, is provided with the web friction between web extra flap and the web cover plate.
Described web cover plate is provided with circular port and Long Circle hole, and the web cover plate is connected with pre-buried girder steel with the cooperation of circular port by bolt, and the cooperation in the Long Circle hole of the circular port of web cover plate by bolt and top, bottom is connected with middle girder steel; Described connection cover plate is provided with Long Circle hole or circular port, and the connection cover plate is connected with middle girder steel with pre-buried girder steel respectively by the cooperation of bolt and Long Circle hole or circular port.
In the present invention, concrete column carries out prefabricated in factory, wherein is embedded into one section pre-buried girder steel that stretches 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 the friction-type high-strength bolt, connect cover plate and with friction plate the pre-buried girder steel of node area is connected with middle girder steel, precast concrete column and between the employing sleeve starch the anchor technology and be connected to form the general frame structure.
Above-mentioned pre-buried girder steel and middle girder steel are put into the friction plate of brass or this class material of aluminium between web and flange surfaces, by the prestressing force on the friction-type high-strength bolt, normal pressure perpendicular to rubbing surface is provided, when normal the use, connection shows as rigidity, under severe earthquake action, form the slippage hinge, by friction dissipation seismic energy.
It is relatively rotating of center of rotation that the slippage of bolt bottom place, bottom flange and web of above-mentioned precast concrete column connecting portion produces with the top flange, thereby has reduced the drawing crack adverse effect to floor.
Above-mentioned pre-buried girder steel is adopting friction-type high-strength bolt, connection cover plate to connect away from the cylinder place, by connecting the rational bolt of arranging on the cover plate, plastic hinge (slippage hinge) is controlled at connecting portion, thereby not only make plastic hinge away from cylinder, reduced the suffered shearing of joint cores effectively, for reducing or cancel stirrup, core space creates conditions, and can improve turning power and the shear behavior of plastic hinge region, 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 difficulty that reinforcing is repaired is bigger, simultaneously, building standardization, industrialization are the development trends of current industrialization, so 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 node of girder steel connects complex structure and power consumption, by damaging the rotational slip that controlled node connecting portion produces, the energy dissipation of ductility is provided, can satisfy the node antidetonation principle of strong node, strong anchoring, improve the damage threshold of structure, make primary structure member not damaged or damage very little.The present invention can obtain the performance of following excellence:
(1) the passive energy-dissipating device that adopts the friction plate of materials such as brass, aluminium flake to form repeatedly still can provide stable non-resilient drag after the circulation through excessive deformation; In the elastic stage later stage, structure still guarantees enough big anti-side rigidity, makes P-△ effect minimum; When external action diminished, structure can be recovered enough rigidity again.
(2) shorten connection length by multilayer shearing friction face is set, reduce number of bolts, avoid the bolt fracture phenomenon.When frange plate ruptured, the web bolt on the horizon of the contiguous edge of a wing can provide horizontal Path of Force Transfer for the axial action that the beam moment of flexure causes, still can keep rational bending resistance under height rotation demand;
(3) by the linkage of bottom flange multilayer slippage is set, has not only reduced the influence of energy-dissipating device to the building function of use, and because center of rotation moves to the top flange, avoided the common drawing crack damage to concrete floor;
(4) plastic hinge moves outside cylinder, thereby reduces the damage to joint cores, realizes the beam hinge surrender mechanism of strong column and weak beam easily;
(5) girder steel and concrete column be after prefabrication, and the unjointed full bolt of field by using connects, and the site operation operation is few, is conducive to reduce human cost, accelerating construction progress and ensures the quality of products, and the expense that the low damage of fabrication and installation is connected is connected approaching with tradition;
(6) in, under the big shake effect, damaged power consumption parts and the connecting portion of concentrating on, main body beam column member can almost not damage under the displacement level of design, can avoid integral node to lose efficacy, but connecting portion and girder steel convenient for maintaining are changed and the dismounting recycling.
Description of drawings
Fig. 1 is that the concrete frame joint after employing apparatus of the present invention connects elevational schematic view;
Fig. 2 is the rotational deformation schematic diagram of embodiment 1 among the present invention;
Fig. 3 is the elevational schematic view of embodiment 2 among the present invention;
Fig. 4 is the elevational schematic view of embodiment 3 among the present invention;
Fig. 5 is the frame construction elevational schematic view after employing apparatus of the present invention;
Among the figure: 1 precast concrete column; 2 Belleville packing rings; Girder steel in the middle of 3; 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.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further explanation.
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 the outer pre-buried girder steel 4 and the middle girder steel 3 that is connected pre-buried girder steel 4 that stretches out precast concrete column 1 cylinder, the cross section of described pre-buried girder steel 4 and middle girder steel 3 is the H type, the web of pre-buried girder steel 4 and middle girder steel 3 is connected by web cover plate 8, and the edge of a wing of pre-buried girder steel 4 and middle girder steel 3 connects by being connected cover plate.
Wherein, connect cover plate and comprise that slotted hole connects 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; Be provided with friction plate 9 between slotted hole connection cover plate 7 and pre-buried girder steel 4 and the 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 the 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 by the cooperation of bolt and circular port 12, and the cooperation in the Long Circle hole 11 of the circular port 12 of web cover plate 8 by bolt and top, bottom is connected with middle girder steel 3; Connect cover plate and be provided with Long Circle hole 11 or circular port 12, connect cover plate and be connected with middle girder steel 3 with pre-buried girder steel 4 respectively with the cooperation of Long Circle hole 11 or circular port 12 by bolt.Connect cover plate and comprise that circular hole connects 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 mainly is made up of beam beam bolt link and friction energy consuming device two parts.As shown in Figure 1, comprise that precast concrete column 1, middle girder steel 3, overhanging pre-buried girder steel 4, high-strength bolt 5, circular hole connect 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 is equipped with Belleville packing ring 2 on high-strength bolt 5 and the high-strength friction-type bolt 13.
Pre-buried girder steel 4 is embedded in the precast concrete column 1 and stretches out the cylinder of precast concrete column 1, leaves the space between pre-buried girder steel 4 and middle girder steel 3, and the top of middle girder steel 3 and pre-buried girder steel 4 terminations is placed circular hole and is connected cover plate 6; The web both sides or one of middle girder steel 3 and pre-buried girder steel 4 are sidelong and are put web cover plate 8, and web extra flap 10 is placed in the outside of web cover plate 8; Slotted hole connects the bottom of going up that cover plate 7 is placed on middle girder steel 3 and pre-buried girder steel 4 bottom flanges respectively.The top flange of middle girder steel 3 and pre-buried girder steel 4 is connected by high-strength bolt 5 with the web place, is connected at bottom flange and the high-strength friction-type bolt 13 of web extra flap 10 installations of middle girder steel 3 and pre-buried girder steel 4.The top flange and the web that adopt high-strength bolt 5 to connect are all offered circular port 12, offer Long Circle hole 11 at the place, bottom flange of the web extra flap 10 that adopts 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: earlier at prefabricated produce in factory precast concrete column 1 and middle girder steel 3, when being prefabricated in the factory concrete column 1 pre-buried girder steel 4 and post concrete one-time-concreting are finished, the longitudinal reinforcement of every precast concrete column 1 stretches out, reserves slurry anchor sleeve at the bottom of the post from capital.After prefabricated post is transported to the job site, adopt slurry anchor mode to finish the connection of lower prop, namely hoisting prefabricated concrete column 1 vertical muscle that lower prop is stretched out is aimed at and is inserted its slurry anchor sleeve, treats to be in the milk to starching the anchor sleeve behind the rectify perpendicular of post.
Each beam column connecting portion constitutes friction energy consuming device with the combination steel part, the bottom wing listrium of girder steel 3, pre-buried girder steel 4 in the middle of the power consumption parts comprise, slotted hole connects cover plate 7, web extra flap 10 and friction plate 9, web friction plate 14, friction-type high-strength bolt 13 and supporting spring washer.Wherein slotted hole connects totally four of cover plates 7, the upper and lower limit of girder steel 3 and pre-buried girder steel 4 bottom flanges in the middle of being separately positioned on; Totally two of web extra flap 10 are symmetricly set on the steel beam web plate both sides; The bottom flange of girder steel 3, pre-buried girder steel 4 and slotted hole connected between the cover plate 7 in the middle of four friction plates 9 were arranged on, and were attached to the inboard that slotted hole connects cover plate 7; Two web friction plates 14 are identical with the planar dimension of web extra flap 10, are arranged between web cover plate 8 and the web extra flap 10, are attached to the inboard of web extra flap 10; Girder steel 3 was fixed together with each parts of pre-buried girder steel 4 in the middle of friction-type high-strength bolt 13 will comprise at the scene.By the prestressing force on the friction-type high-strength bolt 13, normal pressure perpendicular to rubbing surface is provided, when the beam column connecting portion produced 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 be by friction dissipation seismic energy.
Prefabricated beam column by high-strength bolt 5 and high-strength friction-type bolt 13 finish the assembling be connected after, namely form whole combination frame structure.
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:
Present embodiment is the asymmetrical friction connected mode.Type of attachment as shown in Figure 1,9 of friction plates are arranged on the place, bottom flange, and web friction plate 14 is arranged on the web place near the bottom flange, and friction plate 9, web friction plate 14 lay respectively at the inboard that slotted hole connects cover plate 7 and web extra flap 10.Node shows as the rigidity behavior when normal the use, to produce with the top flange be relatively rotating of center of rotation to the slippage of high-strength friction-type bolt 13 bottom bottom flange place and web of beam column connecting portion under the macroseism, as shown in Figure 2, thus can reduce influence to 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 the slippage hinge.By the beam-ends gap is set, offers Long Circle hole 11 and satisfy node to the requirement of turning power.
Embodiment 2:
Present embodiment is symmetry friction connected mode.As shown in Figure 3, be symmetrical arranged slotted hole in last bottom flange and connect cover plate 7, between slotted hole connection cover plate 7 and the last bottom flange friction plate 9 is set respectively, friction plate 9 is positioned at the inboard that slotted hole connects cover plate 7, the bolt hole that connects 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 and is circular port 12, and the bolt hole that the web cover plate is connected with middle girder steel 3 is opened and is Long Circle hole 11.
Embodiment 3:
Present embodiment is no friction plate connected mode.As shown in Figure 4, be symmetrical arranged circular hole in last bottom flange and connect cover plate 6, but do not establish friction plate between circular hole connection cover plate 6 and the edge of a wing, the web place does not establish web extra flap 10 and web friction plate 14 yet.All offer circular port 12 on the edge of a wing and the web, adopt high-strength bolt 5 to connect, form the connection near rigidity.
In sum, assembly concrete post of the present invention-girder steel energy-dissipating type nodal connection device mainly is made up of beam beam bolt link and friction energy consuming device two parts.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 that cylinder is stretched out is connected with high-strength bolt by being connected cover plate with the web place on the edge of a wing with middle girder steel 3, at web extra flap 10 places of bottom flange and close bottom flange friction plate 9 and web friction plate 14 is set respectively.It is relatively rotating of center of rotation that the slippage of bolt bottom place, bottom flange and web of beam column connecting portion produces with the top flange, thereby reduces influence stressed to floor and that use.Form the slippage hinge during contact surface generation slippage of friction plate 9 and girder steel bottom flange and web friction plate 14 and web cover plate 8, by friction energy-dissipating mechanism dissipation seismic energy.Compared with prior art, among the present invention, node shows as the rigidity behavior when normal the use; Friction energy consuming device provides good energy dissipation capacity; Plastic hinge moves the beam hinge surrender mechanism of easy realization strong column and weak beam outward; Damaged dissipative cell and the connecting portion of concentrating on, the damage that can alleviate main members such as beam column, but connecting portion and girder steel convenient for maintaining are changed and the dismounting recycling.Assembly concrete post of the present invention-girder steel energy-dissipating type nodal connection device adopts complete prefabricated industrialized standard production, and on-the-spot full bolt is installed, and it is workable to construct, and joint structure is simple, has very strong engineering practicability.
The above only is preferred embodiment of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle 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 the outer pre-buried girder steel (4) and the middle girder steel (3) that is connected pre-buried girder steel (4) that stretches out precast concrete column (1) cylinder, the cross section of described pre-buried girder steel (4) and middle girder steel (3) is the H type, the web of pre-buried girder steel (4) and middle girder steel (3) is connected by web cover plate (8), and the edge of a wing of pre-buried girder steel (4) and middle girder steel (3) connects by being connected cover plate.
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 that slotted hole connects 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); Be provided with friction plate (9) between described slotted hole connection cover plate (7) and pre-buried girder steel (4) and the 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 the web cover plate (8).
4. assembly concrete post according to claim 1-girder steel energy-dissipating type nodal connection device, it 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) is connected with middle girder steel (3) with the circular port (12) on top, Long Circle hole (11) cooperation of bottom by bolt.
5. assembly concrete post according to claim 2-girder steel energy-dissipating type nodal connection device is characterized in that: described slotted hole connects cover plate (7) and is connected with middle girder steel (3) with pre-buried girder steel (4) respectively with the cooperation of Long Circle hole (11) by bolt.
CN201310203024.2A 2013-05-27 2013-05-27 Assembly concrete post-girder steel energy-dissipating type nodal connection device CN103243819B (en)

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