CN212030866U - Device for simulating avoidance distance of buildings close to strong earthquake ground surface fractured zone - Google Patents
Device for simulating avoidance distance of buildings close to strong earthquake ground surface fractured zone Download PDFInfo
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- CN212030866U CN212030866U CN202021012172.8U CN202021012172U CN212030866U CN 212030866 U CN212030866 U CN 212030866U CN 202021012172 U CN202021012172 U CN 202021012172U CN 212030866 U CN212030866 U CN 212030866U
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- 238000012360 testing method Methods 0.000 description 20
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Abstract
The utility model provides a building avoidance distance simulation device next to a strong earthquake ground surface fracture zone, wherein a bottom plate of a soil body box comprises a fixed steel plate and a movable L-shaped steel plate; the movable L-shaped steel plate comprises a horizontal plate and a vertical plate, the periphery of the horizontal plate is movable and is flexibly connected with the adjacent side gaps at the periphery by canvas, and the vertical plate is spaced from the side wall of the soil body box; four corners of the bottom surface of the movable L-shaped steel plate are respectively fixedly connected with the upper part of the device; a counterforce steel plate is fixed at the bottom, and the lower part of the device and the angle support are fixedly connected to the counterforce steel plate; the top of the actuator is hinged with the upper part of the connecting device, and the bottom of the actuator is hinged with the lower part of the connecting device; the angle support supports the actuator at a set angle. The actuator jacks and pushes the movable L-shaped steel plate to lift the soil in the soil box by a certain angle, and the influence of a real strong earthquake ground surface fracture zone on the building is simulated. The utility model discloses thereby better simulation true condition carries out the building and dodges the distance analysis, gives rationally dodges the suggestion.
Description
Technical Field
The utility model relates to a seismic test technical field specifically is a distance analogue means is dodged to next-door neighbour's macroseism earth's surface rupture area building.
Background
China is a multi-earthquake and strong earthquake country, and 33% of continental strong earthquakes around the world occur in China. A large number of historical earthquake damage examples show that sudden dislocation of the active fault is a main source for generating earthquake, and the active fault is an area along the building, which is the most serious area of building damage and personal casualties. The fault dislocation and the earth surface penetration cause the displacement of the overlying soil layer of the fault and the dislocation and the damage of buildings on the fault, which is called as the violent earthquake earth surface fracture effect, the violent earthquake earth surface fracture can cause serious disasters, especially in the urban areas with dense building population. Therefore, in the urban construction development planning, avoidance of the active fault by the building is an effective means.
The research on the damage mechanism of the fault-induced strong earthquake ground surface fracture and the reasonable determination of the avoidance width have important significance for ensuring the life and property safety of people and fully and reasonably utilizing urban land. The current research means for the surface fracture effect of the strong earthquake mainly comprises three main categories: earthquake damage example analysis, model test and numerical simulation. The model test is close to the real surface fracture condition and is convenient for data acquisition, so that the method is a real and reliable research means. The utility model discloses combine fault diastrophism model and building model to provide a distance analytical equipment is dodged to next-door neighbour's macroseism earth's surface rupture area building.
The conventional constant gravity model test device has the following problems: (1) the stable synchronization of the loading planes is difficult to be accurately ensured, and the experimental precision is difficult to be ensured; (2) the loading angle cannot be conveniently adjusted to realize tests under different angle working conditions; (3) most of the test devices lack a building model, and only simulate the fault failure mechanism for analysis, but neglect the interaction of the fault failure mechanism on the building.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to current test device not enough, combine fault diastrophism model and building model to provide a jumbo size, variable angle's next-door neighbour macroseism earth's surface and break area building and dodge apart from analytical equipment simultaneously, solved the above-mentioned defect that current test device exists betterly.
In order to realize the purpose of the utility model, the utility model discloses the technical scheme who takes as follows:
the device comprises a soil box, a base and a building model, wherein the building model comprises an upper structure and a foundation;
the two front view box side walls of the soil body box are transparent surfaces, and the bottom of the soil body box is arranged on the base;
the bottom plate of the soil body box comprises a fixed steel plate and a movable L-shaped steel plate; the movable L-shaped steel plate comprises a horizontal plate and a vertical plate, and the edge of the horizontal plate and the edge of the vertical plate are fixedly connected into an L-shaped structure; the peripheries of the movable L-shaped steel plate horizontal plates are all movable and are in flexible connection with the adjacent side gaps at the peripheries by canvas, and the movable L-shaped steel plate vertical plate is spaced from the side wall of the soil body box; four corners of the bottom surface of the movable L-shaped steel plate are respectively fixedly connected with the upper part of the device;
the base is of a frame structure, two counter-force steel plates are fixed at the bottom of the base, and the lower part of the device and the angle support are fixedly connected with the two ends of each counter-force steel plate;
the top of the actuator is hinged with the upper part of the connecting device, and the bottom of the actuator is hinged with the lower part of the connecting device; the angle support supports the actuator at a set angle.
The angle support comprises two steel plates which are provided with bevel edges and are welded in parallel, a thick steel plate is fixed on each bevel edge, a circular arc-shaped steel block with the radius identical to that of the actuator is arranged on each thick steel plate, and the circular arc-shaped steel block is in contact with the actuator and supports the actuator.
The simulation method of the device for simulating the avoidance distance of the building next to the strong earthquake surface fractured zone comprises the following steps:
filling clay or other soil in a soil box, tamping in layers according to required compactness, and burying soil pressure gauges and accelerometer sensors at different positions in soil according to a test scheme in the process of filling soil in layers; after the soil is filled, the foundation of the building model is buried in the soil according to a preset position, a soil pressure gauge is arranged below the foundation, strain gauges are adhered to key parts of the upper structure, and a vibration pickup device is arranged on each layer; a displacement sensor and camera equipment are placed on the upper surface of the soil body;
when the test is started, the soil body is jacked up at a set speed by the actuator, and the movable L-shaped steel plate pushes the soil body until the soil body is completely broken;
collecting and recording the change data of each sensor in the soil body fracture process by using a data acquisition system; the test phenomena were recorded by camera for observation and analysis.
According to the test scheme, the type or the arrangement position of the sensor is changed, or the structure type, the foundation type and the foundation burial depth position of the building model are changed, and the loading angle can also be changed.
Compared with the prior art, the utility model has the advantages of:
(1) the size of the model is large, the test phenomenon is obvious, the operation and repeatability are strong, and the experimental result is in accordance with the actual research and experience in the past;
(2) the loading plane (movable L-shaped steel plate) can stably push the soil body at a test set angle under the synchronous jacking of 4 actuators, and the ascending error of the loading plane is in a smaller range through field measurement;
(3) the loading direction of the actuator can be conveniently changed through the matching of the connecting device and the angle support, so that the research on the breaking development of the overburden layer and the damage mechanism of the building near the fault caused by the fault dislocation of different angles can be carried out.
(4) The method is characterized in that a fault dislocation model and a building model are innovatively combined, so that the real situation is well simulated, the building avoidance distance is analyzed, and a reasonable avoidance suggestion is given.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a testing device according to an embodiment of the present invention;
figure 2 is a top view of a soil box according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a loading platform according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a connecting device according to an embodiment of the present invention;
fig. 5 is a top view of a base according to an embodiment of the present invention;
FIG. 6 is a schematic view of a support device according to an embodiment of the present invention;
fig. 7 is a three-dimensional schematic diagram of a building model according to an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the building avoidance distance simulation device next to the strong earthquake ground surface fracture zone comprises a soil box 1, a base 2 and a building model, wherein the building model comprises a superstructure 10 and a foundation 11;
the two front view box side walls of the soil body box 1 are transparent surfaces, and the bottom of the soil body box 1 is arranged on the base 2;
the soil body case 1 is the container of soil, is long rectangular body, and soil body case 1 both sides are the steel sheet of 15mm thick, and two front view long edges are double-deck organic glass, and organic glass is thick 12 mm. The test phenomenon can be conveniently and directly observed, and the strength is ensured; the soil body box 1 is fixed on the base 2 by high-strength bolts.
The bottom plate of the soil body box 1 comprises a fixed steel plate 7 and a movable L-shaped steel plate 8; as shown in fig. 2 and 3, the movable L-shaped steel plate 8 includes a horizontal plate and a vertical plate, and the edge of the horizontal plate and the edge of the vertical plate are fixedly connected to form an L-shaped structure; the peripheries of the horizontal plates of the movable L-shaped steel plates 8 are all movable and are flexibly connected with the gaps of the adjacent sides at the peripheries by canvas, and the vertical plates of the movable L-shaped steel plates 8 are spaced from the side wall of the soil body box 1; four corners of the bottom surface of the movable L-shaped steel plate 8 are respectively fixedly connected with the upper part 4 of the device;
the movable L-shaped steel plate 8 is made into an L shape, so that the soil body and the baffle plate move synchronously in the loading process, the vertical plate is at a certain distance from the side wall of the soil body box, and the influence of the soil body on the test due to extrusion of the side wall of the soil body box 1 is avoided. The bottom of the horizontal plate of the movable L-shaped steel plate 8 is a double-layer steel plate clamping a cross beam, so that the steel plate is prevented from being deformed too much in the loading process, and synchronous and stable loading is ensured.
As shown in fig. 1 and 5, the base 2 has a frame structure, and is a frame made of 120mm square steel having a thickness of 8 mm. Two counter-force steel plates 9 are fixed at the bottom, and the lower part 5 of the device and the angle support 6 are fixedly connected with the two ends of each counter-force steel plate 9; the reaction steel plate 9 is used for conveniently fixing the lower part 5 of the connecting device and the angle support 6 and providing reaction support for jacking soil.
As shown in fig. 4, the top of the actuator 3 is hinged with the upper part 4 of the connecting device, and the bottom is hinged with the lower part 5 of the connecting device; the angle support 6 supports the actuator 3 at a set angle.
As shown in fig. 6, the angle support 6 comprises two steel plates with bevel edges, the two steel plates are welded in parallel, the bevel edges are fixed with thick steel plates, the thick steel plates are provided with arc-shaped steel blocks with the radius consistent with that of the actuator, and the arc-shaped steel blocks are in contact with the actuator 3 and support the actuator 3. Fig. 6 shows a 70 ° angle support, the angle support 6 serving to control the direction of the loading, since the upper connecting device part 4, the lower connecting device part 5 and the actuator 3 are all articulated. Because the angle support is stressed greatly, the angle support is specially designed. The angle support 6 is formed by welding two 6mm thick steel plates in parallel, and a 2cm thick steel plate is welded on the bevel edge. In order to increase the contact area to prevent damage to the actuator, the angled support contacts the actuator with a circular arc shaped steel block having a radius corresponding to the radius of the actuator. The angle support 6 is fixedly connected with a reaction steel plate 9.
When the angle needs to be adjusted, the upper connecting device part 4 is removed from the movable L-shaped steel plate 8 and the angle support 6 is removed from the counter force steel plate 9. The actuator bottom connection is unchanged, the actuator direction is adjusted, the new connecting device upper portion 4 and the angle support 6 are installed, and the angle adjustment can be completed.
The building model of the embodiment is a five-layer frame structure with strip-shaped foundations, and the foundations 11 of the building model are buried in soil layers. The structure type, the foundation burial depth position and the like of the building model can be correspondingly adjusted according to different research purposes, and different working conditions are researched.
The movable L-shaped steel plate 8 plays a role in bearing and pushing a soil body, the four actuators 3 are synchronously lifted, the movable L-shaped steel plate 8 is pushed under the support of the counterforce steel plate 9 and the angle support 6 to lift the soil body in the upper soil body box by a certain angle, so that the lifting of the soil body on the lower wall of the positive fault in the earthquake is simulated, the lifting side of the soil body is the lower wall, and the fixed side of the soil body is the upper wall. The soil body fractured zone penetrates to the ground surface to damage the building model to a certain degree, so that the influence of the real strong earthquake ground surface fractured zone on the building is simulated. And various data are collected in the process so as to analyze the avoiding distance of the building and provide a reasonable avoiding suggestion.
The simulation method of the avoidance distance simulation device of the building next to the strong earthquake surface fractured zone comprises the following steps:
filling clay or other soil substances into the soil box 1, tamping in layers according to the required compactness, and burying soil pressure gauges and accelerometer sensors at different positions in the soil according to a test scheme in the process of filling the soil in layers; after the soil is filled, a foundation 11 of the building model is buried in the soil according to a preset position, a soil pressure gauge is arranged below the foundation 11, strain gauges are adhered to key parts of an upper structure 10, and a vibration pickup is arranged on each layer; a displacement sensor and camera equipment are placed on the upper surface of the soil body;
when the test is started, the actuator 3 is used for jacking at a set speed, and the movable L-shaped steel plate 8 pushes the soil body until the soil body is completely broken;
collecting and recording the change data of each sensor in the soil body fracture process by using a data acquisition system; the test phenomena were recorded by camera for observation and analysis.
The above-mentioned for once complete experimental operating mode, can change sensor type, arrangement position, or building model structure type, basic buried depth position according to the experimental scheme, still can change the loading angle as required with the former method.
It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner of practicing the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and examples. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (2)
1. The device is characterized by comprising a soil box (1), a base (2) and a building model, wherein the building model comprises an upper structure (10) and a foundation (11);
the two front view box side walls of the soil body box (1) are transparent surfaces, and the bottom of the soil body box (1) is arranged on the base (2);
the bottom plate of the soil body box (1) comprises a fixed steel plate (7) and a movable L-shaped steel plate (8); the movable L-shaped steel plate (8) comprises a horizontal plate and a vertical plate, and the edge of the horizontal plate and the edge of the vertical plate are fixedly connected into an L-shaped structure; the peripheries of the horizontal plates of the movable L-shaped steel plates (8) are all movable and are flexibly connected with the adjacent side gaps at the peripheries by canvas, and the vertical plates of the movable L-shaped steel plates (8) are spaced from the side wall of the soil body box (1); four corners of the bottom surface of the movable L-shaped steel plate (8) are respectively fixedly connected with the upper part (4) of the device;
the base (2) is of a frame structure, two counter-force steel plates (9) are fixed at the bottom, and the lower part (5) of the device and the angle support (6) are fixedly connected with the two ends of each counter-force steel plate (9);
the top of the actuator (3) is hinged with the upper part (4) of the connecting device, and the bottom of the actuator is hinged with the lower part (5) of the connecting device; the angle support (6) supports the actuator (3) at a set angle.
2. The device for simulating the avoiding distance of the building next to the strong earthquake ground surface fracture zone according to claim 1, wherein the angle support (6) comprises two steel plates with oblique edges, the steel plates are arranged in parallel in a welding mode, thick steel plates are fixed to the oblique edges, an arc-shaped steel block with the radius being consistent with that of the actuator is arranged on the thick steel plates, and the arc-shaped steel block is in contact with the actuator (3) and supports the actuator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021012172.8U CN212030866U (en) | 2020-06-05 | 2020-06-05 | Device for simulating avoidance distance of buildings close to strong earthquake ground surface fractured zone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021012172.8U CN212030866U (en) | 2020-06-05 | 2020-06-05 | Device for simulating avoidance distance of buildings close to strong earthquake ground surface fractured zone |
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| CN212030866U true CN212030866U (en) | 2020-11-27 |
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| CN202021012172.8U Withdrawn - After Issue CN212030866U (en) | 2020-06-05 | 2020-06-05 | Device for simulating avoidance distance of buildings close to strong earthquake ground surface fractured zone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473934A (en) * | 2020-06-05 | 2020-07-31 | 防灾科技学院 | Device and method for simulating avoidance distance of buildings close to strong earthquake surface fractured zone |
| CN112700706A (en) * | 2021-03-25 | 2021-04-23 | 西南交通大学 | Test device for simulating fault dislocation and seismic coupling effect |
-
2020
- 2020-06-05 CN CN202021012172.8U patent/CN212030866U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473934A (en) * | 2020-06-05 | 2020-07-31 | 防灾科技学院 | Device and method for simulating avoidance distance of buildings close to strong earthquake surface fractured zone |
| CN111473934B (en) * | 2020-06-05 | 2024-05-07 | 防灾科技学院 | Building avoiding distance simulation device and simulation method for fractured zone close to strong earthquake ground surface |
| CN112700706A (en) * | 2021-03-25 | 2021-04-23 | 西南交通大学 | Test device for simulating fault dislocation and seismic coupling effect |
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