随机地震作用下剪力墙结构振动台试验研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (19) : 56-61.

论文

随机地震作用下剪力墙结构振动台试验研究

徐亚洲1，刘克东1，刘章军2，苏宁粉1

作者信息 +

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

XU Yazhou1, LIU Kedong1,LIU Zhangjun2,SU Ningfen1

Author information +

文章历史 +

摘要

为了开展随机地震动作用下钢筋混凝土剪力墙结构的地震反应研究，制作了一个1/5缩尺的12层现浇剪力墙振动台试验模型，基于谱表示-随机函数方法生成了适用于7度设防的34条非平稳多遇地震动样本。通过结构动力特性测试分析了模型结构的振型和阻尼比变化，根据振动台试验结果分析了随机地震动作用下结构动力放大系数、楼层剪力及层间侧移角的均值、方差、变异系数和概率密度函数。结果表明，结构随机地震反应表现出明显的离散性，加速度放大系数的离散性随楼层增高而增大，楼层剪力的离散性随楼层增高而减小。实测的随机反应及其概率信息可为剪力墙结构随机响应数值模拟和动力可靠度评估提供验证。

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.

导出引用

徐亚洲1，刘克东1，刘章军2，苏宁粉1. 随机地震作用下剪力墙结构振动台试验研究[J]. 振动与冲击, 2018, 37(19): 56-61

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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