Experimental study on bi-directional seismic protection device for large and medium span bridges

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (20) : 112-118.

GAO Hao1，YANG Jun2，WANG Junjie3，YAN Haiquan4

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Abstract

The target requirements and corresponding construction pattern of the new bi-directional seismic protection device are explained and interpreted, on this basis, the logic relation and threshold determination principle of each component are analyzed and discussed. The mechanical behavior of the device in multi-engineering scenarios such as slow speed and fast speed was tested jointly by the component test and assembly test. The mechanical behavior of the device in the process of real earthquake was simulated and verified by means of numerical simulation. The experimental results and numerical simulation results both show that the device can meet the requirements of multi-objective function in daily and seismic action with the advantage of bidirectional seismic vibration control. The device provides beneficial supplement and extension for the technical realization of seismic isolation design for large and medium span bridges, which has practical significance for seismic application.
Key words: bi-directional; speed type; displacement type; seismic protection; item test; assembly test

Key words

bi-directional / speed type / displacement type / seismic protection / item test / assembly test

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GAO Hao1，YANG Jun2，WANG Junjie3，YAN Haiquan4. Experimental study on bi-directional seismic protection device for large and medium span bridges[J]. Journal of Vibration and Shock, 2022, 41(20): 112-118

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