CN113373801A - But earthquake back quick replacement's prefabricated pier plasticity hinge structure - Google Patents
But earthquake back quick replacement's prefabricated pier plasticity hinge structure Download PDFInfo
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- CN113373801A CN113373801A CN202110734265.4A CN202110734265A CN113373801A CN 113373801 A CN113373801 A CN 113373801A CN 202110734265 A CN202110734265 A CN 202110734265A CN 113373801 A CN113373801 A CN 113373801A
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- prefabricated
- steel plate
- pier
- plastic hinge
- hinge structure
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The utility model provides a but shake back quick replacement's prefabricated pier plasticity hinge structure, relates to bridge engineering technical field, including pier and the cushion cap of locating the pier bottom, the pier including lie in the non-plasticity hinge district on upper portion and lie in the lower part and by the plasticity hinge district that the plasticity hinge structure constitutes, plasticity hinge structure including connect in the prefabricated strength nature skeleton between the lower extreme in non-plasticity hinge district and the cushion cap upper end, locate the prefabricated energy dissipation protective layer of pin-connected panel of prefabricated strength nature skeleton periphery and along vertically run through prefabricated energy dissipation protective layer and with the self-reset energy dissipation device of the steel sheet A and the steel sheet B fixed connection of prefabricated strength nature skeleton. The pier can still maintain the use function after the earthquake or can recover the use function after being simply repaired, and the repair process can be quickly finished by replacing the prefabricated parts.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a plastic hinge structure of a prefabricated pier capable of being quickly replaced after an earthquake.
Background
The bridge structure is an important component of a traffic system, is often a junction of a traffic lifeline after earthquake, and if the bridge structure is damaged in an earthquake, great difficulty can be brought to disaster relief work, so that attention is paid to how to improve the earthquake-resistant performance of the bridge. Through years of research and practice, the current bridge seismic design can basically achieve the seismic fortification targets of 'no damage due to small earthquake, repairable due to medium earthquake and no fall due to large earthquake', but in recent years, disaster investigation of major earthquakes at home and abroad shows that casualties and economic losses caused by traffic interruption after earthquake and longer reconstruction time are more serious. The damage degree of the bridge structure in the earthquake is effectively controlled, and the shortening of the recovery time of the damaged bridge structure after the damage has very important significance for the smoothness of the traffic life line after the earthquake.
The bridge pier is the most important bearing member of a bridge structure, and in various bridge damages caused by earthquakes, the damage and failure of the bridge pier directly affect the safety and functionality of the bridge structure and are the main reasons for the difficulty in repairing the bridge structure after the earthquake. Conventional piers are generally designed to dissipate seismic energy by yielding of steel bars and cracking of concrete at their plastic hinge regions. Although the bridge designed according to the current specifications is not easy to collapse in an earthquake, the severe damage of the plastic hinge area of the pier after the earthquake can bring huge barriers to the recovery of the whole line or area after the earthquake.
Through the past earthquake damage experience, people gradually recognize the importance of the safety of the bridge structure under the action of an earthquake and the functional recovery after the earthquake. Aiming at the design of the bridge structure with function restorable after earthquake, various national scholars develop extensive research, and hope to protect the integrity of the main body member by designing a corresponding sacrificial member to dissipate earthquake energy, such as arranging an eccentric support, arranging a weak beam with plastic hinge easily, designing a swinging pier system, designing a steel support swinging frame structure with a freely rotatable base, resetting the structure through prestress and the like, but the design has the problems that the damaged member is difficult to replace, the structure is complex, the energy dissipation performance is poor or the application range is narrow.
Disclosure of Invention
The invention provides a plastic hinge structure of a prefabricated pier capable of being quickly replaced after an earthquake, which mainly comprises a prefabricated stiff framework, a prefabricated energy dissipation protective layer and a self-resetting energy dissipation device, so that the pier can still keep the use function after the earthquake or can be restored to the use function after being simply restored, and the restoration process can be quickly completed by replacing a prefabricated component.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a but shake back quick replacement's prefabricated pier plasticity hinge structure, includes the pier and locates the cushion cap of pier bottom, the pier including the non-plasticity hinge area that is located upper portion and the plasticity hinge area that is located the lower part and constitutes by the plasticity hinge structure, plasticity hinge structure including connect in the prefabricated strength nature skeleton between the lower extreme in non-plasticity hinge area and the cushion cap upper end, locate the prefabricated energy dissipation protective layer of pin-connected panel of prefabricated strength nature skeleton periphery and along vertically run through prefabricated energy dissipation protective layer and with the top steel sheet A and the lower part steel sheet B fixed connection's of prefabricated strength nature skeleton from reset energy dissipation device.
Preferably, the prefabricated stiff skeleton comprises a combined section column, a steel plate A and a steel plate B which are fixedly arranged at the top end and the lower part of the combined section column respectively, the bottom end of the combined section column penetrates through the steel plate B and extends into the interior of the bearing platform, the steel plate B is embedded in the upper end surface of the bearing platform, the upper surface of the steel plate B is flush with the upper end surface of the bearing platform, and the lower surface of the steel plate B is welded with longitudinal steel bars in the bearing platform; the non-plastic hinge area, the combined section column, the steel plate A and the steel plate B are coaxially arranged, the shape and the size of the upper surface and the lower surface of the steel plate A are the same as those of the cross section of the non-plastic hinge area, the areas of the upper surface and the lower surface of the steel plate A and the area of the lower surface of the steel plate B are larger than those of the cross section of the combined section column, and the upper surface of the steel plate A is welded with longitudinal steel bars in the non-plastic hinge area.
Preferably, the self-resetting energy consumption devices are multiple, the axes of the multiple self-resetting energy consumption devices are uniformly distributed on the outer side of the combined section column, the self-resetting energy consumption devices are rod-shaped structures, and the upper ends and the lower ends of the rod-shaped structures are detachably and fixedly connected with the lower surface of the steel plate A and the upper surface of the steel plate B through bolts respectively.
Preferably, the prefabricated energy dissipation protective layer is formed by overlapping a plurality of assembling sections, each assembling section is of an annular structure, the inner wall surface of each annular structure is abutted to the outer surface of the corresponding combined section column, the outer wall surface of each annular structure is aligned to the outer surface of the corresponding non-plastic hinge area, and the inner wall surface of each assembling section is fixedly connected with the outer surface of the corresponding combined section column, the lower surfaces of the assembling sections at the top and the steel plate A, the upper surfaces of the assembling sections at the bottom and the steel plate B and the contact surfaces of the adjacent assembling sections through epoxy resin adhesives.
Preferably, the assembly segments are formed by splicing 2 assembly bodies which are mutually symmetrical, a preformed groove which penetrates through the upper end surface and the lower end surface is formed in any assembly body, grouting holes which penetrate through the preformed groove and the outer surface of the assembly body are formed in the groove wall of the preformed groove, the preformed grooves of all the assembly segments are aligned with each other, and the self-resetting energy dissipation device penetrates through the preformed groove and is fixed through filler poured in the preformed groove.
Preferably, the two sides of the outer surface of each assembly section are respectively provided with a lock catch, and the contact surfaces of the 2 mutually symmetrical assembly bodies are fixedly connected through an epoxy resin adhesive and locked through the lock catches.
Preferably, the composite section column is made of steel pipes and ordinary concrete or fiber reinforced concrete materials.
Preferably, the self-resetting energy dissipation device is made of shape memory alloy or low-carbon steel materials.
Preferably, the prefabricated energy dissipation protective layer is made of a fiber reinforced concrete material.
Preferably, the exposed surfaces of the steel plates a and B are subjected to corrosion prevention treatment.
The plastic hinge structure of the prefabricated pier capable of being quickly replaced after the earthquake has the following beneficial effects:
1. the invention has simple structure and convenient restoration after earthquake. The plastic hinge area mainly comprises a prefabricated energy consumption protective layer, a self-resetting energy consumption device and a prefabricated stiff framework. The self-resetting energy dissipation device is connected with the two steel plates of the prefabricated stiff framework through bolts. Each assembling segment of the prefabricated energy dissipation protective layer is provided with a preformed groove, so that a self-reset energy dissipation device can be placed conveniently. Meanwhile, the reserved groove of each segment is provided with a corresponding grouting hole, so that the prefabricated energy-consuming protective layer is filled with fillers after being assembled, and the internal gap is filled. When the prefabricated energy dissipation protective layer and the self-resetting energy dissipation device need to be repaired after an earthquake, the lock catch can be unfastened firstly to take down the damaged prefabricated energy dissipation protective layer segment, then the bolt at the position of the connecting steel plate is loosened to replace the damaged self-resetting energy dissipation device, and finally a new prefabricated energy dissipation protective layer segment is installed and spliced again, so that the repair of the plastic hinge area can be completed, and the device is convenient, efficient, safe and reliable.
2. The invention has strong energy consumption capability and simple and quick restoration after earthquake. When the bridge normally operates, the prefabricated energy dissipation protective layer has better durability and impermeability, can prevent the self-resetting energy dissipation device and the prefabricated stiff skeleton from being corroded, and can bear the load transferred by the upper structure of the bridge together with the self-resetting energy dissipation device and the prefabricated stiff skeleton. When an earthquake occurs, the prefabricated energy consumption protection layer and the self-resetting energy consumption device can be used as a sacrificial protection structure, the earthquake energy can be dissipated by utilizing the characteristics of high ductility and strong energy consumption capability of materials of the prefabricated energy consumption protection layer and the self-resetting energy consumption device, the deformation of a pier can be recovered through the self-resetting energy consumption device, and the damage and the deformation of the prefabricated stiff framework in the earthquake can be reduced or avoided. The prefabricated stiffened framework can still serve as a main bearing structure to continuously provide necessary bearing capacity for the bridge structure after an earthquake, and the condition that traffic is sealed in the process of repairing the prefabricated energy consumption protective layer and the self-resetting energy consumption device is avoided, so that the pier can be ensured not to be repaired or can meet basic use requirements after being simply repaired after the earthquake.
3. The invention has wide application range. The plastic hinge area is simple and convenient to manufacture, strong in stability and high in reliability, and can be applied to most highway bridges and urban bridges.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic cross-sectional structural view of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of one embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of one embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of one embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line A-A of one embodiment of the present invention;
FIG. 7 is a schematic view of the construction of a prefabricated stiffened panel of the present invention;
FIG. 8 is a schematic view of a construction of one assembly of the prefabricated energy dissipating protective layer of the present invention;
01-a plastic hinge region; 02-a non-plastic hinge region; 1-a bearing platform; 2-bridge pier; 3, prefabricating an energy consumption protective layer; 4-self-resetting energy consumption devices; 5-prefabricating a stiff framework; 51-steel plate A; 52-steel plate B; 53-a combined cross-section column; 6, locking and buckling; 7-bolt; 8-longitudinal steel bars in the bearing platform; 9-longitudinal reinforcement in the non-plastic hinge region; 10-stirrups in the non-plastic hinge area; 11-epoxy adhesive; 12-a preformed groove; 13-grouting holes.
Detailed Description
In the following, embodiments of the present invention are described in detail in a stepwise manner, which is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only used for describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, the present invention is not to be construed as being limited thereto.
In one embodiment, the plastic hinge structure of the prefabricated pier capable of being rapidly replaced after an earthquake comprises a pier 2 and a bearing platform 1 arranged at the bottom end of the pier, the pier comprises a non-plastic hinge area 02 positioned at the upper part and a plastic hinge area 01 positioned at the lower part and formed by a plastic hinge structure, the plastic hinge structure comprises a prefabricated stiff framework 5 connected between the lower end of the non-plastic hinge area 02 and the upper end of the bearing platform 1, an assembled prefabricated energy dissipation protective layer 3 arranged on the periphery of the prefabricated stiff framework, and a self-resetting energy dissipation device 4 longitudinally penetrating through the prefabricated energy dissipation protective layer 3 and fixedly connected with the top end and the lower part of the prefabricated stiff framework 5. In this embodiment, as a common setting, the rigidity of the cross section of the plastic hinge region 01 should be smaller than the rigidity of the cross section of the non-plastic hinge region 02, and the vertical bearing capacity of the prefabricated stiff skeleton 5 is not lower than the cross section bearing capacity of the non-plastic hinge region 02.
In a further embodiment, as shown in fig. 2 and 7, the prefabricated stiff skeleton 5 includes a combined cross-section column 53, and a steel plate a51 and a steel plate B52 respectively fixed at the top end and the lower portion of the combined cross-section column 53, the bottom end of the combined cross-section column 53 penetrates through the steel plate B52 and extends into the interior of the platform 1, the steel plate B52 is embedded in the upper end surface of the platform 1, the upper surface of the steel plate B52 is flush with the upper end surface of the platform 1, and the lower surface is welded with the longitudinal steel bar 8 in the platform; the non-plastic hinge area 02, the combined section column 53, the steel plate A51 and the steel plate B52 are coaxially arranged, the shape and the size of the upper surface and the lower surface of the steel plate A51 are the same as the shape and the size of the cross section of the non-plastic hinge area 02, the areas of the upper surface and the lower surface of the steel plate A51 and the area of the upper surface and the lower surface of the steel plate B52 are both larger than the area of the cross section of the combined section column, and the upper surface of the steel plate A51 is welded with the longitudinal steel bars 9 in the non-plastic hinge area. In this embodiment, it is clearly described that the shape and size of the upper and lower surfaces of the steel plate a51 are the same as the shape and size of the cross section of the non-plastic hinge region 02, and as shown in fig. 2, it is preferable that the shape and size of the steel plate a51 and the steel plate B52 are the same.
In a further embodiment, as shown in fig. 1 to 6, there are a plurality of self-resetting energy dissipation devices 4, the axes of the plurality of self-resetting energy dissipation devices 4 around the combined cross-sectional column 53 are uniformly distributed on the outer side of the combined cross-sectional column, and the self-resetting energy dissipation device 4 is a rod-shaped structure, and the upper end and the lower end of the rod-shaped structure are detachably and fixedly connected with the lower surface of the steel plate a51 and the upper surface of the steel plate B52 through bolts 7, respectively; the bolt connection mode is common structure, for example can set up the screw hole on steel sheet A and steel sheet B, welds the backing plate at bar-shaped structure's top and bottom, through the bolt and steel sheet A or steel sheet B fixed connection that run through the backing plate.
In a further embodiment, as shown in fig. 1 to 6 and 8, the prefabricated energy dissipation protective layer 3 is formed by stacking a plurality of assembly segments, each assembly segment is of an annular structure, an inner wall surface of the annular structure abuts against an outer surface of the combined section column 53, an outer wall surface of the annular structure is aligned with an outer surface of the non-plastic hinge region, and the inner wall surface of each assembly segment and the outer surface of the combined section column 53, the top assembly segment and the lower surface of the steel plate a51, the bottom assembly segment and the upper surface of the steel plate B52, and contact surfaces of adjacent assembly segments are fixedly connected through epoxy resin adhesives 11. In this embodiment, as shown in fig. 2 to 5, the cross-sectional composite structure of the energy dissipation protective layer 3 and various composite cross-sectional pillars is shown.
In a further embodiment, as shown in fig. 2 and 8, the assembled segments are formed by splicing 2 mutually symmetrical assembled bodies (only one assembled body is shown in fig. 7), any assembled body is provided with a preformed groove 12 penetrating through the upper end surface and the lower end surface, the wall of the preformed groove 12 is provided with a grouting hole 13 penetrating through the preformed groove and the outer surface of the assembled body, the preformed grooves 12 of the assembled segments are mutually aligned, and the self-resetting energy dissipation device 4 penetrates through the preformed groove 12 and is fixed by filling material poured in the preformed groove; namely, concrete is injected through the grouting holes 13 to fill the preformed groove 12, so that the fixation of the self-resetting energy consumption device 4 is realized.
In a further embodiment, as shown in fig. 1 and 3-6, two sides of the outer surface of the assembly segments are respectively provided with a lock catch 6, and the contact surfaces of 2 mutually symmetrical assembly bodies are fixedly connected by an epoxy resin adhesive 11 and locked by the lock catch 6; the lock catch is a common structure, for example, an expansion bolt can penetrate through the preformed holes at the two ends of the lock catch, the two ends of the lock catch are respectively fixed on the outer surfaces of the 2 mutually symmetrical assembling bodies, and the 2 mutually symmetrical assembling bodies are tightly fixed through the lock catch with two sides crossing the longitudinal joint. In a further embodiment, as shown in fig. 3-6, the composite section column 53 is made of steel pipe with ordinary concrete or fiber reinforced concrete material.
In a further embodiment, the self-resetting energy consumption device 4 is made of shape memory alloy or low-carbon steel material, so as to facilitate resetting after an earthquake.
In a further embodiment, the prefabricated energy dissipating protective layer is made of fiber reinforced concrete.
In a further embodiment, the exposed surfaces of the steel sheets a and B are subjected to a corrosion prevention treatment.
The working principle of the invention is as follows:
when the bridge structure normally operates, the prefabricated energy dissipation protective layer has better durability and impermeability, can prevent the self-resetting energy dissipation device and the prefabricated stiff skeleton from being corroded, and can bear the load transferred by the upper structure of the bridge together with the self-resetting energy dissipation device and the prefabricated stiff skeleton. When an earthquake occurs, the prefabricated energy consumption protective layer and the self-resetting energy consumption device can be used as a sacrificial protective structure, the earthquake energy can be dissipated by utilizing the characteristics of high ductility and strong energy consumption capability of materials of the prefabricated energy consumption protective layer and the self-resetting energy consumption device, the deformation of a pier can be recovered through the self-resetting energy consumption device, and the damage and the deformation of the prefabricated stiff framework in the earthquake can be reduced or avoided. The prefabricated stiff skeleton can still serve as a main bearing structure to continue to provide necessary vertical bearing capacity for the bridge structure after the earthquake, and traffic is prevented from being sealed in the process of repairing the prefabricated energy dissipation protective layer and the self-resetting energy dissipation device, so that the bridge pier can be ensured to meet basic use requirements without being repaired or simply repaired after the earthquake.
When the prefabricated energy dissipation protective layer and the self-resetting energy dissipation device need to be repaired after an earthquake, the damaged assembled sections can be taken down by unfastening the lock catches, then the bolts at the connecting steel plates are loosened, the damaged self-resetting energy dissipation device is replaced, and finally a new plastic hinge area can be repaired by re-installing and splicing in a further embodiment, as shown in fig. 3-6.
If the prefabricated stiffened framework is small in size, the prefabricated stiffened framework can be integrally manufactured in a factory and then transported to a construction site for use; if the prefabricated stiffened framework is large in size, the combined section column, the steel plate A and the steel plate B can be prefabricated in a factory and transported to a construction site respectively, and the steel plate A and the steel plate B are welded on the combined section column on the site and then put into use.
The vertical bearing capacity of the prefabricated stiffened framework is not lower than the section bearing capacity of a non-plastic hinge area of a pier, and the size of the combined section column is designed according to the principle; the combined section column and the section shapes and the sizes of the steel plate A and the steel plate B are not restricted and can be determined according to actual conditions; the section rigidity of the plastic hinge area does not exceed that of the non-plastic hinge area of the pier, and the position of the plastic hinge is ensured not to be transferred.
Claims (10)
1. The utility model provides a but shake back quick replacement's prefabricated pier plastic hinge structure which characterized in that: including the pier and locate the cushion cap of pier bottom, the pier including lie in the non-plasticity hinge district on upper portion and lie in the lower part and by the plasticity hinge district that the plasticity hinge structure constitutes, the plasticity hinge structure including connect in the prefabricated strength nature skeleton between the lower extreme in non-plasticity hinge district and the cushion cap upper end, locate the prefabricated energy dissipation protective layer of pin-connected panel of prefabricated strength nature skeleton periphery and along vertically run through the prefabricated energy dissipation protective layer and with the top of prefabricated strength nature skeleton and the self-reset energy dissipation device of lower part fixed connection.
2. The plastic hinge structure of a precast pier that can be rapidly replaced after earthquake as set forth in claim 1, wherein: the prefabricated stiff skeleton comprises a combined section column, a steel plate A and a steel plate B, wherein the steel plate A and the steel plate B are fixedly arranged at the top end and the lower part of the combined section column respectively; the non-plastic hinge area, the combined section column, the steel plate A and the steel plate B are coaxially arranged, the shape and the size of the upper surface and the lower surface of the steel plate A are the same as those of the cross section of the non-plastic hinge area, the areas of the upper surface and the lower surface of the steel plate A and the area of the lower surface of the steel plate B are larger than those of the cross section of the combined section column, and the upper surface of the steel plate A is welded with longitudinal steel bars in the non-plastic hinge area.
3. The plastic hinge structure of a precast pier that can be rapidly replaced after earthquake as set forth in claim 2, wherein: the self-resetting energy consumption devices are multiple, the axes of the self-resetting energy consumption devices are uniformly distributed on the outer side of the combined section column, the self-resetting energy consumption devices are of rod-shaped structures, and the upper ends and the lower ends of the rod-shaped structures are detachably and fixedly connected with the lower surface of the steel plate A and the upper surface of the steel plate B through bolts.
4. The plastic hinge structure of a precast pier that can be rapidly replaced after earthquake according to claim 3, wherein: the prefabricated energy dissipation protective layer form by a plurality of segmental stacks of assembling, the segmental of assembling be the loop configuration, the inner wall surface of loop configuration offset with the surface of combination cross section post, the outer wall surface aligns with the surface in non-plastic hinge district, the inner wall surface of the segmental of assembling and the surface of combination cross section post between, the segmental of assembling at top and steel sheet A's lower surface between, the segmental of assembling and steel sheet B's upper surface between the bottom and all through epoxy adhesive fixed connection between the adjacent contact surface of the segmental of assembling.
5. The plastic hinge structure of a precast pier that can be rapidly replaced after earthquake according to claim 4, wherein: the assembling segments are formed by splicing 2 mutually symmetrical assembling bodies, a preformed groove which penetrates through the upper end surface and the lower end surface is arranged on any assembling body, grouting holes which penetrate through the preformed groove and the outer surface of the assembling body are formed in the groove wall of the preformed groove, the preformed grooves of all the assembling segments are aligned with each other, and the self-resetting energy dissipation device penetrates through the preformed groove and is fixed by filling materials poured in the preformed groove.
6. The plastic hinge structure of a precast pier that can be rapidly replaced after earthquake according to claim 5, wherein: the two sides of the outer surface of each assembly section are also provided with a lock catch, and the contact surfaces of the 2 mutually symmetrical assembly bodies are fixedly connected through an epoxy resin adhesive and locked through the lock catches.
7. A plastic hinge structure of a precast pier which can be rapidly replaced after earthquake according to any one of claims 2 to 6, wherein: the combined section column is made of steel pipes and common concrete or fiber reinforced concrete.
8. A plastic hinge structure of a precast pier which can be rapidly replaced after earthquake according to any one of claims 1 to 6, wherein: the self-resetting energy dissipation device is made of shape memory alloy or low-carbon steel materials.
9. A plastic hinge structure of a precast pier which can be rapidly replaced after earthquake according to any one of claims 1 to 6, wherein: the prefabricated energy dissipation protective layer is made of fiber reinforced concrete.
10. A plastic hinge structure of a precast pier which can be rapidly replaced after earthquake according to any one of claims 2 to 6, wherein: and the exposed surfaces of the steel plate A and the steel plate B are subjected to anticorrosion treatment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110734265.4A CN113373801A (en) | 2021-06-30 | 2021-06-30 | But earthquake back quick replacement's prefabricated pier plasticity hinge structure |
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| CN202110734265.4A CN113373801A (en) | 2021-06-30 | 2021-06-30 | But earthquake back quick replacement's prefabricated pier plasticity hinge structure |
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| CN114561867A (en) * | 2022-03-10 | 2022-05-31 | 广州市市政工程设计研究总院有限公司 | Festival segmentation self-reset pier of removable power consumption spare after shake |
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