CN212105324U - Assembled soft collision energy dissipation device and shock absorption energy dissipation system - Google Patents

Abstract

The utility model discloses an assembled soft collision energy dissipation device and a shock absorption energy dissipation system; the assembled soft collision energy dissipation device comprises a buckling restraint support composed of a restraint material, an intermediate core material and a buffer layer; The support plate is installed on the concrete base, and together with the basic isolation structure, it forms a shock absorption and energy consumption system. The assembled soft collision energy dissipation device of the utility model has a strong capacity of buffering the displacement of the structure, which can prevent the basic seismic isolation structure from rigidly colliding with the retaining wall under the action of the near-field velocity pulse type ground motion, thereby avoiding the impact on the upper part. Damage to building structures. After the impact, the buckling restraint support and the bearing plate of the energy dissipation device can be removed for repair or replacement. The utility model improves the recoverability of the building structure under the action of earthquake.

Description

Assembled soft collision energy dissipation device and shock absorption energy dissipation system

technical field

The utility model belongs to the field of construction, in particular to an assembled soft collision energy dissipation device and a shock absorption energy dissipation system.

Background technique

According to the earthquake disaster phenomenon in recent years, under the action of near-fault velocity pulse-type ground motion, the earthquake-isolated building may generate excessive displacement response and collide violently with retaining walls or other limiting structures, resulting in damage to the superstructure. In the prior art, there is no detachable shock absorbing device between the seismic isolation building and the retaining wall or other limiting structures.

Utility model content

In order to solve the above problems, the purpose of the present utility model is to provide a prefabricated soft collision energy dissipation device, which can buffer energy dissipation and protect when the shock-isolated building structure collides with the limit structure, and can be used after the collision is completed. Realize disassembly and replacement to improve the recoverability of building structures under the action of earthquake disasters.

The utility model includes the following technical solutions:

An assembled soft collision energy dissipation device, comprising:

The buckling restraint support has a first connection end, a second connection end and a third connection end, the first connection end is used for contacting the seismic isolation bottom plate, and the second connection end is used for being fixed on the concrete base to support the support. the buckling restraint support, and the third connection end is used for connecting with the concrete base as a load-bearing end in the horizontal direction;

A supporting bottom plate is used for connecting the third connection end with the concrete base.

According to a specific solution of the assembled soft collision energy dissipation device of the present invention, the buckling restraint support includes:

Constraining material, including a hard sleeve filled with concrete;

The middle core material is used to bear the axial force, and is installed in the hard sleeve and extends out of the sleeve at both ends. the supporting bottom plate is connected;

A buffer layer is provided between the intermediate core material and the hard sleeve.

The intermediate core material and the restraining material are connected as a whole, and some and only the intermediate core material bears the axial force; the buffer layer forms a circumferential buffer for the intermediate core material; the restraining material forms a rigid restraint for the intermediate core material and support.

According to a specific solution of the assembled soft collision energy dissipation device of the present invention, transverse stiffeners and longitudinal stiffeners are arranged between the first connecting end and the main shaft of the intermediate core material to expand the contact surface, and some of the longitudinal stiffeners are buried. into the restraining material to enhance the force transmission of the first connecting end and improve the stability.

According to a specific solution of the assembled soft collision energy dissipation device of the present invention, transverse stiffeners and longitudinal stiffeners are arranged between the third connection end and the main shaft of the intermediate core material to expand the contact surface and strengthen the third connection End-to-end force transmission for improved stability.

The utility model also includes a shock absorption and energy consumption system, and the shock absorption energy consumption system includes:

The aforementioned prefabricated soft collision energy dissipation device;

The foundation isolation structure has an isolation bottom plate;

a concrete base, the concrete base is a concrete block with a horizontal installation surface, the horizontal installation surface has an upwardly arched installation platform, and the installation platform has a vertical installation surface;

the second connection end of the buckling restraint support is fixed on the horizontal installation surface by means of an installation connector;

One plate surface of the supporting bottom plate is connected with the third connecting end, and the other plate surface is fixed on the vertical installation surface;

According to a specific solution of the shock absorption and energy dissipation system of the present invention, the fixed buckling restraint support and the seismic isolation bottom plate have the same height and are in a straight line, so as to ensure the uniformity of the front bearing and the lifting bearing, and fully Take advantage of the cushioning effect of buckling restraint braces.

According to a specific solution of the shock absorption and energy dissipation system of the present invention, it further includes a plurality of through-length tie rods, which are fixed in the concrete base; the lower end surface of the supporting bottom plate is embedded in the concrete base by the horizontal installation surface. In the seat, the through-length tie rod penetrates through the supporting bottom plate and the concrete base. By setting full-length tie rods, a tighter whole is formed between the buckling restraint support, the supporting bottom plate and the concrete base, which further improves the compressive capacity and stability.

According to a specific solution of the shock absorption and energy dissipation system of the present invention, the installation connector is an equilateral angle steel, one side of the equilateral angle steel is connected and fixed with the hard sleeve of the buckling restraint support, and the other side is fixed. The side is connected and fixed with the concrete base.

According to a specific solution of the shock absorption and energy dissipation system of the present invention, the equilateral angle steel is provided with stiffening ribs to improve the additional lateral stiffness and strengthen the stabilization effect.

According to a specific solution of the shock absorption and energy dissipation system of the present invention, part of the longitudinal stiffening ribs of the supporting bottom plate are embedded in the concrete base to the bottom of the supporting bottom plate, and the lower end surface of the embedded part of the longitudinal stiffening ribs is connected to the bottom of the supporting bottom plate. The bottoms of the supporting bottom plates are at the same level.

Owing to adopting the above-mentioned technical scheme, the utility model has the following beneficial effects:

1. When the building seismic isolation layer and the prefabricated soft collision energy dissipation device of the present invention collide, the core material supported by the buckling restraint is in contact with the seismic isolation layer of the building structure, relying on the compressive design strength of the core material itself and the provided The additional lateral stiffness can limit the displacement of the seismic isolation layer of the building structure to a certain extent, prevent the isolation bearing from being damaged due to excessive deformation of the isolation layer, and avoid the rigid collision between the isolation layer and the retaining wall. Damage to the superstructure.

2. The core material supported by buckling restraint has good ductility and axial force-deformation energy dissipation capacity. Therefore, when the seismic isolation layer of the building and the energy dissipation device collide, the axial deformation of the core material can be used to a certain extent. It consumes the kinetic energy input by the building structure because of the velocity pulse type earthquake, so as to reduce the displacement response of the isolation layer and achieve the effect of shock absorption and energy dissipation.

3. After the earthquake impact, the prefabricated collision energy dissipation device can be disassembled and repaired or replaced directly, thereby improving the recoverability of the building structure. The mechanical design parameters of the prefabricated collision energy dissipation device required by some buildings with similar structural performance Possibly close, mass production can be achieved in factories to save construction time and cost of seismically isolated buildings.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, because It should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

Accompanying drawing 1 is the axonometric view of the assembled soft collision energy dissipation device;

Accompanying drawing 2 is the front view of assembled soft collision energy dissipation device;

Accompanying drawing 3 is the top view of assembled soft collision energy dissipation device;

Accompanying drawing 4 is the side view of assembled soft collision energy dissipation device;

Accompanying drawing 5 is the installation schematic diagram of prefabricated soft collision energy dissipation device;

Accompanying drawing 6 is the top acceleration response time-history curve of embodiment 2;

Accompanying drawing 7 is the seismic isolation layer displacement time-history curve of embodiment 2;

Accompanying drawing 8 is the collision force time-history curve of embodiment 2;

Accompanying drawing 9 is the displacement time-history curve of superstructure bottom layer interlayer of embodiment 2;

Accompanying drawing 10 is the superstructure maximum absolute acceleration curve of embodiment 2;

11 is the maximum interstory displacement curve of the superstructure of Example 2;

Description of drawings, 100-concrete base, 101-long steel tie rod, 102-steel tie rod backing plate, 200-buckling restraint support, 201-contact end steel plate core, 202-first transverse stiffener, 203-first Longitudinal stiffener, 204-equilateral angle, 205-restraining material, 206-triangular stiffener, 207-first bolt, 208-intermediate core, 209-second longitudinal stiffener, 211-second connection end, 221- The third connecting end, 300-supporting bottom plate, 301-third longitudinal stiffening rib, 302-second transverse stiffening rib, 303-second bolt.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments of the present invention are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that The device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integration; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, the first feature above or below the second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact Rather, they are contacted by additional features between them. Also, the first feature being above, above and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is below, below and below the second feature includes the first feature is directly below and diagonally below the second feature, or simply means that the first feature level is smaller than the second feature.

Example 1

This embodiment provides an assembled soft collision energy dissipation device, as shown in FIG. 1 to FIG. 4 , including:

Buckling restraint brace 200, buckling restraint brace 200 includes restraint material 205 and intermediate core material 208, restraint material 205 can be selected as a steel sleeve or other hard material sleeve, and the material of the steel sleeve includes but is not limited to carbon steel such as Q235 Or Q345, the sleeve is filled with concrete, the bottom surface of the restraining material 205 is the second connecting end 211 ; the material of the intermediate core material 208 can be LY225, LY160 or other low-yield strength steel, and the intermediate core material 208 is installed on the restraining material 205 The middle and both ends protrude from the sleeve, one end of the middle core material 208 is the first connecting end 201 and a contact plate is fixed, the contact plate is made of a steel plate core material, and the other end of the middle core material 208 is the third connecting end 221; the middle core material A buffer layer will be filled between 208 and the restraining material 205. The material of the buffer layer includes but not limited to polyethylene, rubber, silica gel and other materials. The intermediate core material bears the axial force;

The device further includes a supporting base plate 300 connected to the buckling restraint support for connecting the buckling restraint support 200 to the concrete base 100 .

In a preferred solution of this embodiment, the length of the middle core material 208 extending from the constraining material 205 on the side of the first connecting end 201 is preferably 260 mm, and the first lateral stiffening is used between the first connecting end 201 and the middle core material 208 The rib 202 and the first longitudinal stiffening rib 203 enlarge the contact surface; it also includes a second longitudinal stiffening rib 209, which extends from the first connecting end 201 and is embedded in the restraining material 205 for a certain length, preferably 50 mm, to improve the stability of the first connecting end, This facilitates the contact between the isolation bottom plate and the buckling restraint support 200 .

In a preferred solution of this embodiment, when the second connecting end 211 of the buckling restraint support 200 is connected to the supporting bottom plate 300, the length of the middle core material 208 of the buckling restraint support 200 protruding from the restraint material 205 is preferably 150 mm, and is consistent with The supporting bottom plate 300 is welded to form a fixed connection, and the second transverse stiffening rib 302 and the third longitudinal stiffening rib 301 are arranged at the same time to enhance force transmission, and some third longitudinal stiffening ribs 301 penetrate to the bottom of the supporting bottom plate 300 at the same level.

Example 2

This embodiment provides a shock absorption and energy consumption device, as shown in FIG. 1 to FIG. 5 , including:

The foundation isolation structure, as a common setting of buildings in the prior art, is supported by the isolation bearing and arranged in the isolation trench, and the lower part of the main body of the foundation isolation structure is provided with an isolation bottom plate;

One concrete base 100 is provided on each side of the basic seismic isolation structure. Optionally, the concrete base 100 is made of concrete with a strength grade of C35, and has a horizontal installation surface, and an upwardly arched installation platform is arranged on the horizontal installation surface. The installation platform has a vertical installation surface;

In the prefabricated soft crash energy dissipation device in Embodiment 1, the second connection end 211 of the buckling restraint support is fixed on the horizontal installation surface of the concrete base 100 by installing the connecting piece. The installation connector detachably installs the buckling restraint support on the concrete base 100, which is convenient for later maintenance and replacement. Specifically, in this embodiment, the restraining material 205 supported by the buckling restraint is fixed on the horizontal installation surface of the concrete base 100 through the equilateral angle steel 204 on both sides, and the equilateral angle steel 204 is connected to the restraining material through the first bolt 207 respectively. 205 is connected to the concrete base 100. Optionally, the first bolts 207 can be M20 bolts. In a preferred solution of this embodiment, four triangular stiffeners 206 are further provided on each side of the equilateral angle steel 204 to improve additional side-resistance rigidity. The supporting bottom plate 300 adopts a prefabricated steel plate with holes, and the upper part of the supporting bottom plate 300 is connected to the vertical installation surface of the concrete base 100 through the second bolts 303 .

In a preferred solution of this embodiment, the lower part of the supporting bottom plate 300 is embedded in the concrete base 100 . The through-length steel tie rod 101 penetrates through the embedded part of the supporting bottom plate and the concrete base, and both ends of the through-length steel tie rod 101 are fixed on the steel tie rod backing plate 102 of the concrete base 100 by bolts. Optionally, the number of through-length steel tie rods 101 is 8 and the specification is Φ25. By setting the full-length steel tie rods, the buckling restraint support, the supporting bottom plate and the concrete base form a tighter whole, which further improves the compressive capacity and stability.

In a preferred solution of this embodiment, the fixed buckling restraint support and the seismic isolation bottom plate have the same height and are in a straight line.

When the shock absorption and energy dissipation system of this embodiment is implemented, when the shock isolation layer of the building and the energy dissipation device collide, the core material supported by the buckling restraint is in contact with the shock isolation layer of the building structure, relying on the compressive design strength of the core material itself. As well as the additional lateral stiffness provided, it can limit the displacement of the seismic isolation layer of the building structure to a certain extent, prevent the isolation bearing from being damaged due to excessive deformation of the isolation layer, and avoid the occurrence of the isolation layer and the retaining wall. Rigid collision resulting in the destruction of the superstructure. Because the core material supported by buckling restraint has good ductility and axial force-deformation energy dissipation capacity, when the building seismic isolation layer and the energy dissipation device collide, the axial deformation of the core material can be used to a certain extent. It consumes the kinetic energy input by the building structure due to the velocity pulse type earthquake, so as to reduce the displacement response of the seismic isolation layer and achieve the effect of shock absorption and energy dissipation.

The shock absorption and energy dissipation device of this embodiment is applied in a specific engineering example, and a 5-story basic seismic isolation structure is taken as an engineering example. The mass and stiffness of the structure are evenly distributed along the height, and the specific parameters are shown in Table 1.

Table 1 Structural attribute parameters

The elastic-plastic model (Bouc-wen model) is used for the inter-story restoring force model and the seismic-isolating layer restoring force model of the foundation isolation structure, which assumes that the mass of each floor is concentrated at the floor and does not consider compression deformation. For the near-field velocity pulse-type ground motion, the ground motion records obtained by the ARCELIK station in the 1999 KOCAELI earthquake in Turkey were selected, and the peak acceleration PGA=149.9gal was modulated to 0.4g (g is the acceleration of gravity) before loading.

According to whether the isolation structure collides and the type of collision, the following three situations are considered: (1) No collision: when the width of the isolation trench is sufficient and the isolation bearing does not become unstable, the isolation structure can be free Movement; (2) Hard collision (that is, no prefabricated soft collision energy dissipation device is installed), the distance from the edge of the foundation isolation structure to the concrete retaining wall or foundation pit is 0.25m, and the surrounding retaining wall or foundation pit is extremely rigid (3) Soft collision: Install a concrete base formed by integrated construction or formed separately at the position of the seismic isolation ditch close to the retaining wall or foundation pit, and use the embodiment on the concrete base The method of 2 is to install the prefabricated soft collision energy dissipation device. The distance between the prefabricated soft collision energy dissipation device and the basic isolation structure is taken as 0.15m. The restoring force model of the device adopts the elastic-plastic model (Bouc-wen model), and the parameters are shown in Table 1. shown.

The dynamic time-history responses of the above three cases are shown in Figures 6 to 11 in the description. By analyzing the different working conditions of the seismic isolation structure, the working forms and characteristics of the energy dissipation device are explored.

Combining Fig. 6 and Fig. 7, it can be seen that the maximum absolute acceleration of the top layer of the upper structure of the basic isolation structure without collision or soft collision is greatly reduced compared with that of the hard collision, but the gap of the maximum displacement of the isolation layer is relatively small. . The peak displacement of the isolation layer without collision is about 0.58m, which exceeds the reserved width of the isolation trench, and the structure will collide; the maximum displacement of the isolation layer corresponding to hard collision and soft collision is about 0.3m and 0.35m, the difference is It is not large, which reflects the function of the energy-consuming device to limit the displacement and reduce the dynamic response to a certain extent. It can be seen from Fig. 8 and Fig. 9 combined with Fig. 7 that compared with the hard collision, the maximum displacement of the seismic isolation layer in the soft collision is increased by about 16.7%, but the collision force between the seismic isolation layer and the surrounding retaining wall or foundation pit is not high. There is a great reduction, and the magnitude of the peak reduction in the interlayer displacement of the bottom layer of the superstructure is also very obvious, which is closer to no collision. This further illustrates the good performance of the energy dissipation device for isolation and shock absorption, which can restrain the displacement of the isolation layer and reduce the dynamic response of the structure.

Figures 10 and 11 are respectively the distribution diagrams of the maximum absolute acceleration and the maximum inter-story displacement of the superstructure along the floors under the above three working conditions. In the case of hard collision, the maximum absolute acceleration and maximum interlayer displacement of the superstructure are much larger than those of no collision or soft collision; compared with no collision, the dynamic response of the superstructure in soft collision is improved, but the improvement is limited.

At the same time, it can be seen from the above that the non-collision isolation structure may have a hard collision due to excessive displacement, and the energy dissipation device converts the hard collision into a soft collision, realizing the function of limiting the displacement of the isolation layer and reducing the structure isolation. The possibility of damage to the shock absorption function has achieved the expected effect at the beginning of the design of the energy consumption device.

Taking the 5-story basic seismic isolation structure as an example, the dynamic response of the structure in the case of soft collision is analyzed accordingly. It can be seen that the soft collision can reduce the maximum displacement of the isolation layer compared with the case of no collision, and the soft collision can be effective compared with the case of hard collision. Reduces the dynamic time history response of the superstructure. It can be seen from this that the assembled soft impact energy dissipation device proposed by the present invention can limit the displacement of the seismic isolation layer and reduce the time-course dynamic response of the upper structure, which belongs to an excellent seismic isolation and shock absorption device.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (10)

1. An assembled soft collision energy dissipating device, comprising:

the buckling restrained brace is provided with a first connecting end, a second connecting end and a third connecting end, the first connecting end is used for being in contact with the shock insulation bottom plate, the second connecting end is used for being fixed on the concrete base to support the buckling restrained brace, and the third connecting end is used for being connected with the concrete base to serve as a force bearing end in the horizontal direction;

and the bearing bottom plate is used for connecting the third connecting end with the concrete base.

2. The fabricated soft collision energy dissipating device according to claim 1, wherein the buckling restrained brace comprises:

the restraint material comprises a hard sleeve, and concrete is filled in the hard sleeve;

the middle core material is used for bearing axial force, is arranged in the hard sleeve, and two ends of the middle core material extend out of the sleeve, one end of the middle core material is a first connecting end and is fixedly provided with a contact plate, and the other end of the middle core material is a third connecting end and is connected with the bearing bottom plate;

and the buffer layer is arranged between the middle core material and the hard sleeve.

3. The fabricated soft collision energy dissipation device according to claim 2, wherein a transverse stiffener and a longitudinal stiffener are disposed between the first connection end and the central core main shaft, and the longitudinal stiffener is embedded in the constraining material.

4. The fabricated soft collision energy dissipating device according to claim 2, wherein a transverse stiffener and a longitudinal stiffener are disposed between the third connecting end and the central core main shaft.

5. A shock-absorbing and energy-dissipating system comprising the fabricated soft collision energy-dissipating device as claimed in any one of claims 1 to 4, comprising:

a base isolation structure having an isolation floor;

the concrete base is a concrete block with a horizontal mounting surface, the horizontal mounting surface is provided with an upwardly arched mounting platform, and the mounting platform is provided with a vertical mounting surface;

the second connecting end of the buckling restrained brace is fixed on the horizontal mounting surface by using a mounting connecting piece;

one plate surface of the bearing bottom plate is connected with the third connecting end, and the other plate surface is fixed on the vertical mounting surface.

6. The system for absorbing and dissipating energy of claim 5, wherein the fixed buckling restrained brace and the seismic isolation base plate have the same height and are in a straight line.

7. The shock and energy absorbing system of claim 5, further comprising a plurality of through-length tension rods fixed in said concrete base;

the lower end face of the bearing bottom plate is embedded into the concrete base through the horizontal mounting face, and the through long pull rod penetrates through the bearing bottom plate and the concrete base.

8. The shock and energy dissipation system of claim 5, wherein the installation connecting piece is an equilateral angle steel, one side of the equilateral angle steel is fixedly connected with the hard sleeve of the buckling restrained brace, and the other side of the equilateral angle steel is fixedly connected with the concrete base.

9. The system of claim 8, wherein the angle steel is provided with stiffening ribs.

10. The system of claim 5, wherein some of the longitudinal stiffening ribs of the support base plate are embedded in the concrete base to the bottom of the support base plate, and the lower end surfaces of the embedded longitudinal stiffening ribs are at the same level as the bottom of the support base plate.

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