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Bridge Structure Dynamics Test Device

A technology for testing devices and bridge structures, applied in measuring devices, vibration tests, machine/structural component tests, etc., can solve the research deviation of the dynamic characteristics of bridge structures, sinusoidal excitation loads cannot adapt to complex earthquakes, ignore bridge structure stiffness and Damping characteristics and other issues, to achieve a simple and effective process

Inactive Publication Date: 2018-08-17
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of device is suitable for simple dynamic problems, but ignores the stiffness and damping characteristics of the bridge structure itself, and the sinusoidal excitation load cannot adapt to the actual complex earthquake action, resulting in deviations in the study of the dynamic characteristics of the bridge structure

Method used

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Examples

Experimental program
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Embodiment 1

[0026] Such as figure 1 with figure 2 As shown, this embodiment includes: a first excitation device 1, a second excitation device 2, a counterweight trolley 3 and a rail 4, wherein: the first excitation device 1 and the second excitation device 2 are connected by a rail 4, and the rail 4 is provided with There is a counterweight trolley 3;

[0027] The first excitation device 1 and the second excitation device 2 are all provided with: a base 16, a rotating frame 13, a limit support 8 and an eccentric vibration mechanism, wherein: one end of the rotating frame 13 is rotationally connected with the base 16, and the other One end is fixedly connected with the limit support 8, and an eccentric vibration mechanism is fixed on the bottom of the base 16, and the vibration end 10 of the eccentric vibration mechanism is in contact with the rotating frame 13;

[0028] The rail 4 is connected to the first excitation device 1 and the second excitation device 2 through the limit support...

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Abstract

A bridge structure dynamics testing device in the technical field of bridge structure dynamics is disclosed and comprises a first excitation device, a second excitation device, a track and a counterweight trolley, wherein the first excitation device and the second excitation device are interconnected via the track, and the counterweight trolley is arranged on the track; each of the first excitation device and the second excitation device is provided with a pedestal, a rotation framework, a limiting support seat and an eccentric vibration mechanism, wherein one end of the rotation framework is connected with the substrate in a rotating manner while the other end of the rotation framework is fixedly connected with the limiting support seat, the eccentric vibration mechanism is arranged in the pedestal, a vibrating end of the eccentric vibration mechanism contacts with the rotation framework, and the track is connected with the first excitation device and the second excitation device after running through the limiting support seat. The bridge structure dynamics testing device can be used for simulating vertical earthquakes, and therefore dynamic characteristics of a bridge structure can be researched under effects of the vertical earthquakes.

Description

technical field [0001] The invention relates to a technique in the field of bridge structure dynamics, in particular to a bridge structure dynamics testing device capable of simulating vertical seismic action. Background technique [0002] The severe ground motion caused by vertical earthquakes will seriously damage the bridge structure, and the damage situation is difficult to analyze through theoretical calculations. Therefore, it is necessary to conduct simulation experiments on the basis of structural dynamics theoretical calculations. The existing detection device equates the bridge structure to a concentrated mass, and the excitation load is simulated as a sinusoidal motion. This kind of device is suitable for simple dynamic problems, but ignores the stiffness and damping characteristics of the bridge structure itself, and the sinusoidal excitation load cannot adapt to the actual complex earthquake action, resulting in deviations in the study of the dynamic characteris...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/04G01M7/02G01M5/00
CPCG01M5/0008G01M5/0066G01M7/022G01M7/04
Inventor 宋晓冰李林家高路陈思佳冷予冰陈超曲楠黄城均俞逸舟
Owner SHANGHAI JIAOTONG UNIV
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