阅读说明：本技术 一种考虑河谷差动效应的高坝抗震试验模拟装置 (High dam anti-seismic test simulation device considering river valley differential effect ) 是由 练继建 王孝群 燕翔 练冲 刘铭劼 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种考虑河谷差动效应的高坝抗震试验模拟装置,包括低频门式反力墙,低频振动台,高频门式反力墙,高频振动台,土箱,反力低频作动器,反力高频作动器,低频振动台作动器和高频振动台作动器,本发明的低频振动台和高频振动台联合振动的试验方法,可为高坝地震动力响应模拟试验同时提供高频和低频地震波输入；门式反力墙结构可将弯矩作用有效转化为反力墙拉杆的拉力作用,其中的高频门式反力墙和低频门式反力墙可提供垂直河谷方向的高频和低频地震动的输入,同时还可模拟沿坝基交界面的不同位置的地震波相位和幅度的差异,更准确地模拟河谷差动效应,有效地弥补了以往地震模拟振动台设施的不足。(The invention discloses a high dam anti-seismic test simulation device considering a valley differential effect, which comprises a low-frequency gate type reaction wall, a low-frequency vibration table, a high-frequency gate type reaction wall, a high-frequency vibration table, a soil box, a reaction low-frequency actuator, a reaction high-frequency actuator, a low-frequency vibration table actuator and a high-frequency vibration table actuator, wherein the low-frequency vibration table and the high-frequency vibration table are combined to vibrate; the gate-type reaction wall structure can effectively convert the bending moment effect into the tension effect of the reaction wall pull rod, the high-frequency gate-type reaction wall and the low-frequency gate-type reaction wall can provide high-frequency and low-frequency seismic motion input in the direction perpendicular to the valley, and simultaneously can simulate the difference of seismic wave phases and amplitudes at different positions along the dam foundation interface, so that the valley differential effect is more accurately simulated, and the defects of the conventional seismic simulation vibration table facility are effectively overcome.)

1. A high dam seismic test simulation device considering a valley differential effect, comprising:

the low-frequency gate type reaction wall (5) is arranged on a vibrating table foundation, and a vibrating table mounting space is arranged in the vibrating table foundation in the low-frequency gate type reaction wall (5);

the low-frequency vibration table (1), the low-frequency vibration table (1) is arranged in the vibration table mounting space;

the high-frequency door type reaction wall (6), the high-frequency door type reaction wall (6) is arranged on the low-frequency vibration table (1);

the high-frequency vibration table (2) is arranged on the low-frequency vibration table (1) and is positioned in the high-frequency door type reaction wall (6);

the soil box (8) is arranged on the high-frequency vibration table (2), a simulation dam body (11) and a simulation foundation (10) of the high dam to be tested are arranged in the soil box (8) after being reduced in proportion, and a damping boundary (9) for simulating infinite foundation radiation damping effect is arranged between the simulation foundation (10) and the soil box (8);

the counter-force low-frequency actuator (4) is fixed on the low-frequency door type counter-force wall (5) and directly acts on the soil box (8);

the reaction high-frequency actuator (3) is fixed on the high-frequency door type reaction wall (6) and directly acts on the soil box (8);

the low-frequency vibration table actuator (13) is fixed on the side wall and the bottom surface of the vibration table mounting space, and directly acts on the low-frequency vibration table (1); and the number of the first and second groups,

high-frequency vibration table actuator (12), high-frequency vibration table actuator (12) are fixed on low-frequency vibration table (1), and direct action in high-frequency vibration table (2), simultaneously, high-frequency vibration table (2) with pass through between low-frequency vibration table (1) high-frequency vibration table actuator (12) are connected.

2. The high dam earthquake-proof test simulation device considering the valley differential effect as claimed in claim 1, wherein the low frequency door type reaction wall (5) and the high frequency door type reaction wall (6) are both in a door-shaped structure and comprise two vertical wall bodies and reaction wall pull rods (7), and the reaction wall pull rods (7) are connected with the tops of the two vertical wall bodies to convert the action of bending moment on the vertical wall bodies into the pulling force on the reaction wall pull rods (7).

3. A high dam earthquake resistance test simulation device considering valley differential effect according to claim 1, wherein the reaction force low frequency actuator (4) and the reaction force high frequency actuator (3) are arranged in a horizontal direction.

4. A high dam earthquake resistance test simulation device considering valley differential effect according to claim 1, wherein a plurality of the reaction force low frequency actuators (4) and the reaction force high frequency actuators (3) are arranged in the vertical direction.

5. The high dam earthquake-proof test simulation device considering the river valley differential effect according to claim 1, wherein the low frequency vibration table actuators (13) provided at the side walls of the vibration table installation space are arranged in the horizontal direction and along the periphery of the low frequency vibration table (1); the low-frequency vibration table actuators (13) arranged on the bottom surface of the vibration table mounting space are arranged along the vertical direction; the low-frequency vibration table actuator (13) is arranged along the vertical direction.

Technical Field

The invention relates to a seismic simulation test technology of civil and hydraulic engineering, in particular to a large-scale high dam vibration table simulation experiment device capable of realizing high and low frequency loading and earthquake moving valley differential effect.

Background

In recent years, the hydropower industry of China is rapidly developed, and a large number of high dams with dam heights of more than 300m are built or start to be built successively. At present, in the top 100 dams of the world dam, China occupies 20 seats, and 14 seats are in excess of 200 m. Under the action of earthquake, the earthquake-resistant performance of dam engineering, especially high dam engineering, is related to the life and property safety of thousands of residents at the downstream of the dam. Therefore, under the action of an earthquake, the research on earthquake dynamic response of the dam body and the foundation of the high dam has important significance on the engineering safety of the high dam. The vibration table is the most effective facility for seismic engineering simulation research, the high dam body is placed on the vibration table for dynamic response simulation experiment, the verification and check can be carried out on the seismic design and seismic performance analysis of the dam, and a basis is provided for the high dam engineering design and safe operation.

At present, a high dam shaking table simulation test has several significant problems. First, the loading frequency is in greater conflict with the geometry and load. The earthquake motion may affect the tenth order natural vibration frequency of the dam, if a large vibration table is adopted for simulation, the size can be enlarged, the simulation precision is improved, but the high frequency cannot be loaded; if a small-sized vibration table is adopted for simulation, high-frequency loading can be carried out, but the geometric dimension is small, and the simulation precision is limited. Secondly, the existing research results and earthquake damage investigation results prove that the valley field has important influence on earthquake motion, and when the earthquake occurs, the earthquake motion amplitude and phase at different positions of the dam foundation interface of the high dam project are obviously different, so that serious earthquake damage is caused. The 8.5 grade earthquake of Ningxia Haimai, the 7.7 grade earthquake between Tonghai and Emei of Yunnan province and the earthquake of Liaoning Haicheng all have earthquake abnormal phenomena in valley fields, which leads to serious earthquake damage. However, it is difficult for the existing large-scale vibration table to simultaneously satisfy the above-mentioned simulation requirements.

Therefore, the invention provides a simulation device which can meet the high-frequency loading of a high dam under the condition of a large scale and can meet the simulation of the river valley differential effect.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a large-scale vibration table testing device capable of simulating a large-scale model test, which can simultaneously provide high-frequency and low-frequency seismic motion input and can also realize the simulation of a valley differential effect.

The technical scheme adopted by the invention is as follows: a high dam seismic test simulation device considering a valley differential effect comprises:

the low-frequency door type counter-force wall is arranged on a vibrating table foundation, and a vibrating table mounting space is arranged in the vibrating table foundation in the low-frequency door type counter-force wall;

the low-frequency vibration table is arranged in the vibration table mounting space;

the high-frequency gate type counter force wall is arranged on the low-frequency vibration table;

the high-frequency vibration table is arranged on the low-frequency vibration table and is positioned in the high-frequency door type reaction wall;

the soil box is arranged on the high-frequency vibration table, a simulation dam body and a simulation foundation of the high dam to be tested are arranged in the soil box after being reduced in proportion, and a damping boundary for simulating infinite foundation radiation damping effect is arranged between the simulation foundation and the soil box;

the counter-force low-frequency actuator is fixed on the low-frequency door type counter-force wall and directly acts on the soil box;

the counter-force high-frequency actuator is fixed on the high-frequency door type counter-force wall and directly acts on the soil box;

the low-frequency vibration table actuator is fixed on the side wall and the bottom surface of the vibration table mounting space and directly acts on the low-frequency vibration table; and the number of the first and second groups,

the high-frequency vibration table actuator is fixed on the low-frequency vibration table and directly acts on the high-frequency vibration table, and meanwhile, the high-frequency vibration table is connected with the low-frequency vibration table through the high-frequency vibration table actuator.

Furthermore, the low-frequency door type reaction wall and the high-frequency door type reaction wall are of a door-shaped structure and comprise two vertical wall bodies and reaction wall pull rods, the reaction wall pull rods are connected with the two vertical wall bodies, and the bending moment applied to the vertical wall bodies is converted into the pulling force applied to the reaction wall pull rods.

Further, the reaction force low-frequency actuator and the reaction force high-frequency actuator are both arranged in the horizontal direction.

Furthermore, the counter-force low-frequency actuator and the counter-force high-frequency actuator are arranged in a plurality along the vertical direction.

Further, the low-frequency vibration table actuators arranged on the side wall of the vibration table mounting space are arranged along the horizontal direction and are arranged along the periphery of the low-frequency vibration table; the low-frequency vibration table actuators arranged on the bottom surface of the vibration table mounting space are arranged along the vertical direction; the low-frequency vibration table actuators are arranged along the vertical direction.

The invention has the beneficial effects that: the invention relates to a high dam anti-seismic test simulation device considering the valley differential effect, which adopts a test method of combined vibration of a low-frequency vibration table and a high-frequency vibration table, and can provide high-frequency and low-frequency seismic wave input for a high dam seismic dynamic response simulation test; the gate-type reaction wall structure can effectively convert the bending moment effect into the tension effect of the reaction wall pull rod, the high-frequency gate-type reaction wall and the low-frequency gate-type reaction wall can provide high-frequency and low-frequency seismic motion input in the direction perpendicular to the valley, and simultaneously can simulate the difference of seismic wave phases and amplitudes at different positions along the dam foundation interface, so that the valley differential effect is more accurately simulated, and the defects of the conventional seismic simulation vibration table facility are effectively overcome. The simulation device provided by the invention is used for carrying out simulation tests, and can more accurately reflect the actual earthquake response of the dam body.

Drawings

FIG. 1: the invention considers the structure schematic diagram of the high dam anti-seismic test simulator of the river valley differential effect;

the attached drawings are marked as follows: 1. a low frequency vibration table; 2. a high-frequency vibration table; 3. a counter-force high-frequency actuator; 4. a counter-force low-frequency actuator; 5. a low-frequency gate type counterforce wall; 6. a high-frequency gate type counterforce wall; 7. a counterforce wall pull rod; 8. a soil box; 9. a damping boundary; 10. simulating a foundation; 11. simulating a dam body; 12. a high-frequency vibration table actuator; 13. a low frequency vibration table actuator.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:

as shown in fig. 1, the high dam anti-seismic test simulation device considering the river valley differential effect comprises a low-frequency vibration table 1, a high-frequency vibration table 2, a counter-force high-frequency actuator 3, a counter-force low-frequency actuator 4, a low-frequency gate type counter-force wall 5, a high-frequency gate type counter-force wall 6, a high-frequency vibration table actuator 12, a low-frequency vibration table actuator 13 and the like.

A vibration table installation space is arranged in a vibration table foundation, the low-frequency vibration table 1 is arranged in the vibration table installation space, the low-frequency vibration table actuators 13 are fixed on the side wall and the bottom surface of the vibration table installation space and directly act on the low-frequency vibration table 1, the low-frequency vibration table actuators 13 arranged on the side wall of the vibration table installation space are arranged along the horizontal direction and are arranged along the periphery of the low-frequency vibration table 1, and the low-frequency vibration table actuators 13 arranged on the bottom surface of the vibration table installation space are arranged along the vertical direction; high-frequency vibration platform 2 sets up on the low-frequency vibration platform 1, high-frequency vibration platform actuator 12 is fixed on the low-frequency vibration platform 1 to direct action in high-frequency vibration platform 2, low-frequency vibration platform actuator 13 arranges along vertical direction, through high-frequency vibration platform actuator 12 connects low-frequency vibration platform 1 with high-frequency vibration platform 2 can with low-frequency vibration excitation transmission extremely high-frequency vibration platform 2 and then transmit for test structure on the high-frequency vibration platform 2. The test structure comprises a simulation dam body 11 and a simulation foundation 10 of a dam to be measured, which are integrally reduced by actual engineering according to a certain scale, wherein the simulation dam body 11 and the foundation 10 are arranged in a soil box 8, and damping boundaries 9 are arranged on two sides of the soil box 8 and between the simulation foundation 10 and the inner wall of the soil box 8 and are used for simulating the damping effect of infinite foundation radiation; the soil box 8 is arranged on the high-frequency vibration table 2.

The low-frequency door type reaction wall 5 is arranged on the vibrating table base and located outside the range of the low-frequency vibrating table 1, provides reaction force for the reaction force low-frequency actuator 4 arranged on the low-frequency door type reaction wall, and the reaction force low-frequency actuator 4 directly acts on the soil box 8 to provide low-frequency seismic wave input for tests. The high-frequency door type reaction wall 6 is arranged on the low-frequency vibration table 1 and is positioned outside the range of the high-frequency vibration table 2, the high-frequency door type reaction wall 6 vibrates along with the low-frequency vibration table 1 and provides reaction force for the reaction force high-frequency actuator 3 arranged on the high-frequency door type reaction wall, and the reaction force high-frequency actuator 3 also directly acts on the soil box 8 to provide high-frequency seismic wave input for a test.

In order to reduce the reaction wall section and receive moment of flexure effect and pull apart, low frequency gate-type reaction wall 5 with high frequency gate-type reaction wall 6 all is "door" font structure, including two vertical wall bodies in face and reaction wall pull rod 7, two faces are connected to reaction wall pull rod 7 the top of vertical wall body will the moment of flexure effect that vertical wall body received turns into the pulling force that reaction wall pull rod 7 received.

The counter-force low-frequency actuator 4 with the counter-force high-frequency actuator 3 has all been arranged a plurality ofly along vertical direction, and, the counter-force low-frequency actuator 4 with the counter-force high-frequency actuator 3 all arranges along the horizontal direction.