CN216809539U - SMA strong energy consumption self-resetting shock absorption tenon - Google Patents

Abstract

A SMA high-energy-consumption self-resetting shock absorption tenon is applied to a segment-assembled pier and comprises energy-consumption shock absorption tenons made of SMA and a connecting device, wherein the energy-consumption shock absorption tenons are installed in sequentially-assembled pier segments, the connecting device is installed on a bearing platform, each energy-consumption shock absorption tenon comprises an energy-consumption shock absorption tenon main body at the upper end and an energy-consumption shock absorption tenon connecting cap at the lower end, the cross sections of the energy-consumption shock absorption tenon main bodies are circular, the diameters of the cross sections of the energy-consumption shock absorption tenon main bodies are gradually reduced from the bottom to the top, and the energy-consumption shock absorption tenon connecting caps are connected to the connecting device; therefore, the anti-seismic capacity requirement of the segment assembled pier is better met, higher yield force is provided, sudden damage under the action of strong shock is effectively avoided, the safety performance is better improved, the anti-thrust rigidity and the energy consumption capacity of the segment assembled pier can be effectively improved, the pier top displacement response of the pier under the action of the earthquake is effectively controlled, and the beam falling condition is prevented.

Description

SMA strong energy consumption self-resetting shock absorption tenon

Technical Field

The utility model relates to the technical field of civil engineering, in particular to an SMA strong energy consumption self-resetting shock absorption tenon.

Background

Research, development and application of the segment-assembled pier are receiving more and more attention. The segmental assembled pier and the construction technology thereof have the advantages of ensuring the construction quality, improving the production efficiency, reducing the labor cost, reducing the construction interference, saving energy, protecting environment and the like, and are increasingly applied to highways, railways and municipal bridge engineering. Part of the engineering structures are located in a high-intensity earthquake region or a near fault region, and the uncertainty of the seismic safety of the pier and the bridge assembled by the application sections is increased to a certain extent. In order to ensure the anti-seismic safety of the segment-assembled pier, scholars at home and abroad perform theoretical, numerical simulation, pseudo-static test and seismic table test research on the segment-assembled pier, and research results show that the anti-thrust rigidity, peak bearing capacity and energy consumption capacity of the segment-assembled pier are weaker than those of a cast-in-place pier, and the anti-seismic performance is relatively weaker. In order to improve the seismic performance of the segment-assembled pier, a student provides a shock absorption measure to enhance the seismic performance of the segment-assembled pier, the shock absorption measure is mainly divided into an internal energy consumption damper and an external energy consumption damper, the internal energy consumption damper uses more energy consumption steel bars and replaceable energy consumption steel bars, the external energy consumption damper uses more mild steel dampers and viscoelastic dampers, research results show that the seismic performance of the segment-assembled pier using the dampers is obviously improved, the thrust rigidity, the peak bearing capacity and the accumulated energy consumption capacity of the segment-assembled pier are improved to different degrees, and the seismic performance of the segment-assembled pier can be effectively improved by applying the shock absorption measure.

In 1995, the sakashen earthquake occurs in Japan, and a multi-bridge structure is dismantled and rebuilt due to the fact that residual displacement of the bridge pier after the earthquake is large. Therefore, when the shock absorption measures are applied to improve the thrust resistance rigidity, the peak bearing capacity and the accumulated energy consumption capacity of the segment assembled pier, the segment assembled pier after the earthquake needs to keep smaller residual displacement, and the pier can be quickly repaired after the earthquake. Therefore, how to improve the anti-seismic performance indexes such as the anti-thrust rigidity, the peak bearing capacity and the accumulated energy consumption capacity of the segment-assembled pier and the like, the residual displacement of the segment-assembled pier after the earthquake can be effectively controlled, and the self-resetting capacity of the segment-assembled pier is ensured, which is always a hot problem for the research of scholars at home and abroad. Some insufficiencies that present festival section was assembled pier and is used energy dissipation attenuator exist:

1. under the action of strong shock, when the pier swings in a reciprocating mode, the yield force of the energy dissipation damper for the pier assembled by the segments is small, and the damper is prone to sudden damage.

2. When the earthquake occurs, the energy consumption capacity of the energy consumption damper for the pier assembled by the segments has an upper limit, the displacement response of the top of the pier assembled by the segments is large, and the beam falling is easy to occur.

3. The energy consumption damper applied to the segment-assembled pier in the current engineering is insufficient in energy consumption capacity, the energy consumption capacity for improving the segment-assembled pier is limited, and the application and popularization of the segment-assembled pier in a high-intensity area or a near fault area are not facilitated.

4. Although the energy consumption damper applied to the pier assembled by the segments in the current engineering can improve the fullness degree of a hysteretic curve of the pier, the residual displacement of the pier assembled by the segments after the earthquake is also obviously increased, and the energy consumption damper is not beneficial to the rapid recovery of the pier assembled by the segments after the earthquake.

5. After the earthquake, the pier energy dissipation dampers assembled by most segments are not beneficial to installation and disassembly and replacement after the earthquake, and inconvenience is caused to the construction before the earthquake of the pier and the repair work after the earthquake.

6. The energy-consuming damper applied to the section-assembled pier in the current engineering is complex in structure and not beneficial to industrial and standardized production.

Therefore, in view of the above defects, the designer of the present invention, through careful research and design, combines the experience and results of related industries for a long time, and researches and designs an SMA energy-intensive self-resetting damping tenon to overcome the above defects.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an SMA strong-energy-consumption self-resetting shock absorption tenon which is simple in structure, convenient to operate, assemble and disassemble, capable of effectively overcoming the defects of the prior art and better suitable for shock absorption of a section assembly pier.

In order to achieve the purpose, the utility model discloses an SMA strong energy consumption self-resetting shock absorption tenon, which is applied to a segment assembled pier and is characterized in that:

the SMA energy-consuming self-resetting shock absorption tenon comprises an energy-consuming shock absorption tenon 100 and a connecting device 200, wherein the energy-consuming shock absorption tenon 100 is installed in a pier segment 8 which is assembled in sequence, the connecting device 200 is installed on a bearing platform 7, the energy-consuming shock absorption tenon 100 is connected to the top of the connecting device 200, the energy-consuming shock absorption tenon 100 comprises an energy-consuming shock absorption tenon main body 1 at the upper end and an energy-consuming shock absorption tenon connecting cap 5 at the lower end, the energy-consuming shock absorption tenon main body 1 and the energy-consuming shock absorption tenon connecting cap 5 are made of SMA and are connected into a whole, the cross section of the energy-consuming shock absorption tenon main body 1 is a circular cross section, the diameter of the cross section of the energy-consuming shock absorption tenon main body 1 is gradually reduced from the bottom to the top, and the energy-consuming shock absorption tenon connecting cap 5 is connected to the connecting device.

Wherein: the energy-consuming and shock-absorbing tenon main body 1 is designed to be variable in cross section, small in top cross section and large in bottom cross section, and adapts to bending moment distribution of a pier body of the pier so that the pier has stable shock absorption performance.

Wherein: the connection device comprises a threaded connector 6 which is located at the middle position and extends upwards, and the energy-consuming and shock-absorbing tenon connecting cap 5 is provided with an internal thread which is in threaded connection with the threaded connector 6 so as to assemble the energy-consuming and shock-absorbing tenon 100 and the connection device 200 into a whole.

Wherein: the height of the energy dissipation and shock absorption tenon main body 1 is higher than that of the energy dissipation and shock absorption tenon connecting cap 5.

Wherein: connecting device 200 still includes steel connecting plate 2, a plurality of nut 3 and a plurality of stock 4, steel connecting plate 2 contains a plurality of round holes that pass through the fixed stock 4 of nut 3.

Wherein: the round hole is big end up's shoulder hole down, and the less lower extreme of each round hole supplies stock 4 to run through and carries out the upper end locking through the nut 3 that is located the great upper end of round hole.

Wherein: the nut 3 adopts a 12.9-grade M20 high-strength bolt.

Wherein: a plurality of stock 4 are laid along the limit of connecting plate 2 equidistant and can be pre-anchored on cushion cap 7 thereby guarantee that connecting plate 2 is even on cushion cap 7 application of force.

Wherein: the bearing platform 7 is provided with a plurality of spliced pier segments 8, and the upper ends of the pier segments 8 are provided with bent caps 9.

Wherein: the energy-dissipating and shock-absorbing tenon body 1 extends from the pier segment 8 into the capping beam 9.

According to the above content, the SMA strong energy consumption self-resetting shock absorption tenon has the following effects:

1. the structure that adopts circular cross section to be the variable cross section to can be adapted to with the moment of flexure distribution of pier shaft, the shock resistance demand that can better satisfy the section and assemble the pier.

2. Provides higher yield force, effectively avoids sudden damage under the action of strong shock and better improves the safety performance.

3. The anti-thrust rigidity and the energy consumption capability of the segment-assembled pier can be effectively improved, the pier top displacement response of the pier under the action of an earthquake can be effectively controlled, and the beam falling condition is prevented.

4. The section-assembled pier is made of the SMA material, the hysteresis curve is full, the energy consumption capability is high, the anti-seismic safety of the section-assembled pier in a high-intensity area is improved, and meanwhile, the residual displacement of the section-assembled pier after an earthquake is controlled, so that the pier can be quickly repaired after the earthquake.

5. The post-earthquake residual displacement of the segment-assembled pier can be controlled, the post-earthquake damage of the segment-assembled pier is reduced, and the post-earthquake recovery speed of the segment-assembled pier is increased; is convenient for industrial and mechanical production, and the product quality is effectively ensured.

6. The energy dissipation and shock absorption tenon and the bearing platform are in threaded connection through the connecting device, so that the installation and the disassembly, replacement and repair after the earthquake are facilitated.

The details of the present invention can be obtained from the following description and the attached drawings.

Drawings

Fig. 1 shows a schematic structural diagram of the SMA energy-intensive self-resetting shock absorption tenon of the utility model.

Fig. 2 shows a first structural diagram of the connecting device of the utility model.

Fig. 3 shows a second schematic structural view of the connecting device of the present invention.

Fig. 4 shows a schematic structural diagram of the energy-dissipating and shock-absorbing tenon of the present invention.

Fig. 5 shows a schematic view of the constituent components of the connecting device of the present invention.

Fig. 6 shows a schematic view of the installation of the platform of the present invention.

Fig. 7 shows an installation schematic view of the pier segment of the present invention.

Fig. 8 shows a schematic view of the installation of the utility model.

Reference numerals:

the energy-consuming shock-absorbing tenon comprises an energy-consuming shock-absorbing tenon main body 1, a connecting steel plate 2, a screw cap 3, an anchor rod 4, an energy-consuming shock-absorbing tenon connecting cap 5, a threaded connector 6, a bearing platform 7, a pier segment 8, a cover beam 9, an energy-consuming shock-absorbing tenon 100 and a connecting device 200.

Detailed Description

Referring to fig. 1 to 8, the SMA energy-intensive self-resetting shock-absorbing tenon according to the present invention is shown, which is applied to a segment-assembled pier.

As shown in fig. 1, the SMA energy-intensive self-resetting shock-absorbing tenon includes an energy-consuming shock-absorbing tenon 100 made of SMA (shape memory alloy) and a connecting device 200, the energy-consuming shock-absorbing tenon 100 is installed in pier segments 8 which are sequentially assembled, the bottom of the connecting device 200 is installed on a bearing platform 7, and the top of the connecting device 200 is connected with the energy-consuming shock-absorbing tenon 100, wherein the energy-consuming shock-absorbing tenon 100 includes an energy-consuming shock-absorbing tenon main body 1 at the upper end and an energy-consuming shock-absorbing tenon connecting cap 5 at the lower end, the energy-consuming shock-absorbing tenon main body 1 and the energy-consuming shock-absorbing tenon connecting cap 5 are both made of SMA and are integrally connected, as shown in fig. 4, the cross section of the energy-consuming shock-absorbing tenon main body 1 is a circular cross section, the diameter of the cross section of the energy-consuming shock-absorbing tenon main body 1 is gradually reduced from the bottom to the top, and the energy-consuming shock-absorbing tenon connecting cap 5 is connected to the connecting device 200.

Specifically, the energy-consuming shock-absorbing tenon 100 adopts a variable cross-section design, has a small top cross-section and a large bottom cross-section, and is adapted to the bending moment distribution of a pier body of a pier, so that the material for manufacturing the energy-consuming shock-absorbing tenon is saved, and the construction cost is reduced; meanwhile, the pier assembled by using the segments of the energy dissipation and shock absorption tenon 100 with the circular cross section can resist the earthquake motion effect of different incident angles, so that the pier has stable shock absorption performance.

Wherein, connecting device 200 contains the threaded connection head 6 that is located the intermediate position and upwards extends, threaded connection head 6 adopts high strength steel to make, energy consumption shock attenuation tenon joint cap 5 is equipped with threaded connection to threaded connection head 6's internal thread to assemble energy consumption shock attenuation tenon 100 and connecting device 200 into whole, realize that energy consumption shock attenuation tenon 100 passes through the stable connection of connecting device 200 with cushion cap 7, and energy consumption shock attenuation tenon 100's whole is located inside a plurality of pier sections of assembling 8.

The height of the energy-consuming and shock-absorbing tenon main body 1 is higher than that of the energy-consuming and shock-absorbing tenon connecting cap 5, so that the energy-consuming and shock-absorbing tenon main body 1 is favorably arranged in the pier segment 8 and effectively plays a role in shock resistance. Because the energy dissipation and shock absorption tenon 100 is made of the SMA material, the SMA material has higher yield force and super-elasticity capability, so that the post-earthquake residual displacement of the pier assembled by the sections applying the energy dissipation and shock absorption tenon 100 is controlled in a smaller range, the structure has good self-recovery capability, and post-earthquake damage of the pier is reduced.

Wherein, see fig. 2, fig. 3 and fig. 5, connecting device 200 still includes connection steel plate 2, a plurality of nut 3 and a plurality of stock 4, connection steel plate 2 and stock 4 all adopt high strength steel to make, connection steel plate 2 contains a plurality of round holes through 3 fixed stock 4 of nut, the round hole is big shoulder hole down, and the less lower extreme of each round hole supplies stock 4 to run through and carries out upper end locking through the nut 3 that is located the great upper end of round hole, nut 3 adopts 12.9 level M20 high strength bolt, ensures the reliability of installation, the intermediate position of connection steel plate 2 upper end is equipped with threaded connection head 6, stock 4, threaded connection head 6 orientation opposite direction.

Wherein, a plurality of stock 4 are laid and can be pre-anchored on cushion cap 7 along the limit equidistant of steel connecting plate 2 to guarantee that steel connecting plate 2 is even in the application of force on cushion cap 7. The connecting steel plate 2 has high strength and rigidity, and the stability of connection of the energy dissipation and shock absorption tenon 100 and the assembled pier segment 8 is guaranteed.

Referring to fig. 6, 7 and 8, the connection device 200 is anchored to the bearing platform 7 through a plurality of anchor rods 4, a plurality of assembled pier segments 8 are arranged on the bearing platform 7, a capping beam 9 is arranged at the upper end of each pier segment 8, and the energy-consuming and shock-absorbing tenon main body 1 extends from each pier segment 8 to the capping beam 9.

The specific embodiment of the utility model is as follows:

placing the connecting steel plate 2 at a reserved position of the bearing platform 7, enabling an anchor rod 4 made of high-strength steel to penetrate through a reserved circular hole of the connecting steel plate 2, screwing the high-strength nut 3, and connecting the connecting steel plate 2 and the bearing platform 7 together; then, the internal thread of the energy-consuming and shock-absorbing tenon connecting cap 5 is aligned to the threaded connector 6 of the connecting steel plate 2 and is screwed down along the thread, so that the energy-consuming and shock-absorbing tenon 100 is firmly connected with the connecting device 200; and then, installing each section of the section assembly pier, enabling the energy-consuming and shock-absorbing tenon main body 1 to penetrate through a reserved hole channel of each pier section, stringing all the pier sections together, enabling the energy-consuming and shock-absorbing tenon main body 1 to penetrate through a reserved hole channel of the cover beam 9, and anchoring the top end of the energy-consuming and shock-absorbing tenon main body 1 to the top of the cover beam 9 by using an anchorage device, wherein the installation is finished.

When a strong earthquake occurs, the bridge with the pier assembled by the segments swings under the action of earthquake motion, the energy dissipation tenon 100 installed inside the pier assembled by the segments deforms in an axial stretching or bending mode, the energy dissipation tenon 100 is made of memory alloy materials and has high energy dissipation capacity, energy of the earthquake motion input structure is consumed along with the cooperative deformation of the pier, the resistance capacity of the pier assembled by the segments is improved, the cross section of the energy dissipation tenon 100 is a circular cross section, the earthquake motion action of the pier assembled by the segments from different angles is enhanced, and the earthquake-proof safety level of the bridge is improved. In addition, the energy-consuming and shock-absorbing tenon main body 1 has super-strong elastic capacity, can improve the capacity of restoring to the original position of the pier assembled by the segments after the earthquake, controls the residual displacement of the top of the pier, reduces the occurrence of the beam falling condition, and reduces the damage of the pier assembled by the segments after the earthquake.

After the earthquake, when the energy dissipation and shock absorption tenon 100 is damaged, each section of the pier can be detached firstly, and then the energy dissipation and shock absorption tenon 100 is screwed off from the threaded connector 6 of the connecting steel plate 2 along the threads, so that the energy dissipation and shock absorption tenon 100 can be replaced quickly after the earthquake.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more here: the terms of the energy-consuming and shock-absorbing tenon body 1, the connecting steel plate 2, the screw cap 3, the anchor rod 4, the energy-consuming and shock-absorbing tenon connecting cap 5, the threaded connector 6, the bearing platform 7, the pier segment 8, the cover beam 9, the energy-consuming and shock-absorbing tenon 100, the connecting device 200 and the like do not exclude the possibility of using other terms; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

It should be apparent that the foregoing description and illustrations are by way of example only and are not intended to limit the present disclosure, application or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention will include any embodiments falling within the foregoing description and the appended claims.

Claims (10)

1. The utility model provides a SMA consumes energy by force from restoring to throne shock attenuation tenon, is applied to the segment and assembles in the pier, its characterized in that:

the SMA high-energy-consumption self-resetting shock absorption tenon comprises energy consumption shock absorption tenons (100) made of SMA and a connecting device (200), the energy consumption shock absorption tenons (100) are installed in pier sections (8) which are sequentially assembled, the connecting device (200) is installed on a bearing platform (7), the top of the connecting device (200) is connected with the energy consumption shock absorption tenons (100), each energy consumption shock absorption tenon (100) comprises an energy consumption shock absorption tenon main body (1) at the upper end and an energy consumption shock absorption tenon connecting cap (5) at the lower end, the energy consumption shock absorption tenon main body (1) and the energy consumption shock absorption tenon connecting cap (5) are made of SMA and are connected into a whole, the cross sections of the energy consumption shock absorption tenon main bodies (1) are circular, the diameters of the cross sections of the energy consumption shock absorption tenon main bodies (1) are gradually reduced from the bottom to the top, and the energy consumption shock absorption tenon connecting caps (5) are connected to the connecting device.

2. The SMA energy-intensive self-resetting shock-absorbing tenon of claim 1, wherein: the energy-consuming and shock-absorbing tenon main body (1) adopts a variable cross section design, the cross section of the top of the energy-consuming and shock-absorbing tenon main body is small, the cross section of the bottom of the energy-consuming and shock-absorbing tenon main body is large, and the energy-consuming and shock-absorbing tenon main body is adaptive to the bending moment distribution of a pier body of the pier so that the pier has stable shock-absorbing performance.

3. The SMA energy-intensive self-resetting shock-absorbing tenon of claim 1, wherein: the connecting device comprises a threaded connector (6) which is located in the middle and extends upwards, and the energy-consuming and shock-absorbing tenon connecting cap (5) is provided with an internal thread connected to the threaded connector (6) in a threaded manner so as to assemble the energy-consuming and shock-absorbing tenon (100) and the connecting device (200) into a whole.

4. The SMA energy-intensive self-resetting shock-absorbing tenon of claim 1, wherein: the height of the energy-consuming and shock-absorbing tenon main body (1) is higher than that of the energy-consuming and shock-absorbing tenon connecting cap (5).

5. The SMA energy-intensive self-resetting shock-absorbing tenon of claim 1, wherein: connecting device (200) still include steel connection plate (2), a plurality of nut (3) and a plurality of stock (4), steel connection plate (2) contain a plurality of round holes through fixed stock (4) of nut (3).

6. The SMA energy-intensive self-resetting shock-absorbing tenon of claim 5, wherein: the round hole is big end up's shoulder hole down, and the less lower extreme of each round hole supplies stock (4) to run through and carries out the upper end locking through nut (3) that are located the great upper end of round hole.

7. The SMA energy-intensive self-resetting shock-absorbing tenon of claim 6, wherein: the nut (3) adopts a 12.9-grade M20 high-strength bolt.

8. The SMA energy-intensive self-resetting shock-absorbing tenon of claim 5, wherein: the anchor rods (4) are arranged at equal intervals along the edges of the connecting steel plates (2) and can be pre-anchored on the bearing platform (7), so that the connecting steel plates (2) can apply force uniformly on the bearing platform (7).

9. The SMA energy-intensive self-resetting shock-absorbing tenon of claim 1, wherein: be equipped with a plurality of pier segments (8) of assembling on cushion cap (7), the upper end of pier segment (8) is equipped with bent cap (9).

10. The SMA energy-intensive self-resetting shock-absorbing tenon of claim 9, wherein: the energy dissipation and shock absorption tenon main body (1) extends from the pier section (8) to the inside of the cover beam (9).

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