基于小波包能量的地基土对框筒结构地震损伤影响试验研究  

Experimental investigation of the seismic damage effect of foundation on frame-core tube structures considering foundation soil based on the wavelet packet energy

作　　者：沈超 钱德玲[1] SHEN Chao;QIAN Deling(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院

出　　处：《振动与冲击》2019年第16期174-180,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(51378168)

摘　　要：为获得地基土对高层框筒结构地震响应的影响,建立了固定基础体系和土-结构相互作用体系两种振动台试验模型。通过振动台试验,获得了两种试验模型在不同烈度地震作用下各楼层的加速度时程,以及地震前后白噪声扫频数据;首次从小波包能量角度出发,对比分析了两种试验模型在不同工况作用下上部结构的能量分布、振动基频变化以及易损伤部位的差别;研究结果表明:相比刚性基础体系,地基土能够显著降低上部结构所吸收的地震能量和振动基频,改变结构的能量分布和易损部位;研究成果可为高层框筒结构的抗震性能研究提供参考。To investigate the influence of soil on the seismic response of high-rise buildings with a frame-core tube structure,two shaking table test models were built;a fix-based model and a soil-structure dynamic interaction model.The time history of acceleration gauged at each floors under the excitation of different seismic waves and the white noise sweeping data gauged before and after the excitation of seismic were obtained through the shaking table test.For the first time,the energy distribution,vibration frequency,and damage location of the two test models were compared and analyzed under the excitation of different seismic based on the theorem of wavelet packet energy.The results show that the soil can significantly reduce the energy absorbed by the superstructure and vibration frequency,and change the energy distribution and damage position of the structure.

关 键 词：小波包能量 土-结构动力相互作用 结构损伤 振动台试验 

分 类 号：TU375[建筑科学—结构工程] TU317