Shaking table tests for a continuous girder bridge&rsquo;s aseismic control with viscous dampers

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (23) : 91-97.

Shaking table tests for a continuous girder bridge’s aseismic control with viscous dampers

LI Yong1,3,WANG Weining2,3,YAN Weiming3

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Abstract

Viscous dampers are installed on a lot of bridges located in high-intensity earthquake fortification zones for aseismic control.Their design and arrangement are always performed according to dynamic elastoplastic theoretical analysis and numerical simulation but they are lack of verification with shaking table tests,and practical engineering examples of bridges experiencing the test of earthquake are less.Here,porous type viscous dampers were designed and manufactured,and their hysteretic curves were measured through cyclic loading tests.Then these dampers were installed on a continuous girder bridge scale model to conduct shaking table tests to verify the bridge aseismic control effect.Test results showed that damping forces of viscous dampers increase with increase in loading frequency,and their measured hysteretic curves are close to an ellipse; viscous dampers have good aseismic control effects on the bridge’s fixed pier bottom strain,pier top displacement and longitudinal displacement of movable supports; there are different bridge aseismic rates under input of different earthquake waves,the maximum bridge aseismic rate can reach more than 50%.

Key words

Viaduct / Viscous damper / Shaking table test / Seismic control / Hysteretic behavior

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LI Yong1,3,WANG Weining2,3,YAN Weiming3. Shaking table tests for a continuous girder bridge’s aseismic control with viscous dampers[J]. Journal of Vibration and Shock, 2018, 37(23): 91-97

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