Shaking table tests for a shear wall structure under stochastic ground motions

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (19) : 56-61.

XU Yazhou1, LIU Kedong1,LIU Zhangjun2,SU Ningfen1

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Abstract

In order to investigate seismic responses of shear wall structures subjected to stochastic ground motions, a 1/5 scaled 12-layer shear wall model structure for shaking table tests was fabricated.34 non-stationary ground motion samples of frequent earthquake suitable to fortification of magnitude 7 earthquakes were generated based on the spectral representation-random function method.Variations of vibration modal shapes and damping coefficients of the model structure were analyzed through the model structure’s dynamic characteristics measurement.Means, variances, variation coefficients and probability density functions of structural dynamic magnification factor, inter-layer shear force and inter-story drift angle under stochastic ground motions were analyzed according to shaking table testing results.The results showed that the model structure random seismic responses has an obvious discreteness, the discreteness of acceleration magnification factor increases with increase in floor height, while that of inter-layer shear forces decreases with increase in floor height; the measured model structure’s random seismic responses and their probability information can be used to verify numerical simulation of a shear wall structure’s random seismic responses and its dynamic reliability evaluation.

Key words

shear wall / random ground motion / shaking table test / dynamic characteristic / seismic performance

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XU Yazhou1, LIU Kedong1,LIU Zhangjun2,SU Ningfen1. Shaking table tests for a shear wall structure under stochastic ground motions[J]. Journal of Vibration and Shock, 2018, 37(19): 56-61

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