Long-life high-performance bridge expansion joint device
An expansion joint, high-performance technology, applied in the direction of bridges, bridge parts, measuring devices, etc., can solve the problems of little knowledge about the performance of expansion joints, achieve important social and economic benefits, and reduce the effect of accumulated travel
Inactive Publication Date: 2017-08-29
SOUTHEAST UNIV
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Problems solved by technology
Little is known about the performance of expansion joints with eddy current dampers
Method used
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[0022] The present invention will be further described below in conjunction with the accompanying drawings.
[0023] see Figure 1-8 , the present invention is a long-life and high-performance bridge expansion joint device, which includes rubber and steel plate combined modulus expansion joints, an eddy current damper 7 and a fiber grating displacement sensor 8, and the two ends of the eddy current damper 7 pass through The spherical hinge supports are respectively fixed at the bottom of the beams on both sides of the expansion joint, arranged in pairs horizontally to reduce the cumulative stroke of the expansion joint. The optical fiber grating displacement sensor 8 is set at the bottom of the beam at the expansion joint, located at the In the middle of the device 7, the displacement change of the expansion joint is monitored; at the lateral position of the bridge, the eddy current damper is approximately symmetrical to the fiber grating displacement sensor.
[0024] The rub...
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The invention discloses a long-life high-performance bridge expansion joint device, and the device comprises a rubber and steel plate combined modular pattern expansion joint, eddy current retarders (7), and an FBG (fiber bragg grating) displacement sensor (8). Two ends of each eddy current retarders (7) are respectively fixed at the beam bottoms at two sides of the expansion joint through a ball hinged support in a lateral paired manner, so as to reduce the accumulation travel of the expansion joint. The FBG displacement sensor (8) is disposed at the beam bottom of the expansion joint, is located between the eddy current retarders (7), and monitors the displacement change of the expansion joint. At a lateral position of a bridge, the eddy current retarders (7) are approximately symmetric relative to the FBG displacement sensor (8). According to the invention, the device achieves the good control of the vibration displacement of the bridge expansion joint and the real-time dynamic monitoring of the use performance of the expansion joint, is high in practicality, is resistant to fatigue, is long in service life, is good in damping effect, and is good in application prospect.
Description
technical field [0001] The invention relates to a vibration reduction technology, which belongs to the technical field of bridge structure vibration control. Background technique [0002] The expansion joint is one of the important connecting components of the bridge structure. Its main function is to connect different bridge sections into a bridge as a whole, and it helps to avoid excessive deformation of the overall bridge structure caused by external loads such as temperature and wind, thus effectively Protect the safety of bridge structures. But at the same time, because the expansion joints directly bear the impact of the wheel load and are exposed to the natural environment for a long time, they are the most vulnerable and difficult to maintain parts of the bridge structure. According to statistics, the average life span of bridge expansion joints is 10 to 15 years, which is much lower than the design life of the bridge itself. The damage of expansion joints not only...
Claims
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IPC IPC(8): G01B11/14E01D19/06
CPCE01D19/062G01B11/14
Inventor 王浩向需文张玉平李爱群
Owner SOUTHEAST UNIV