防灾减灾工程学报2017，Vol.37Issue(3)：368-373,6.DOI:10.13409/j.cnki.jdpme.2017.03.006
近断层速度脉冲对RC框架的地震反应影响
Effects of Near-fault Velocity Pulse Motions on Seismic Responses of the RC Frame
摘要
Abstract
Although the influence of near-fault velocity pulse on the seismic responses of reinforced concrete (RC) structures is notable,current seismic design code does not make comprehensive analysis on structural velocity response.In this paper two groups of strong ground motion records within the rupture distance of 20 km in Wenchuan earthquake are selected:three velocity pulse and three non-pulse records.Then,the characteristics of these six records are analyzed for comparison in the velocity spectrum,V2 time-frequency response spectrum (V2 TFRS) and the accumulative kinetic energy curve respectively.Finally,a RC frame structure is simulated to analyze the nonlinear seismic damage behaviors and the effects of strong velocity pulse on the structure subjected to pulse and non-pulse motions.Results show that the input energy of near-fault pulse motions is much greater than that of the non-pulse motions.Furthermore,pulse motions have a damage effect on the long period structures in the near-fault region.关键词
近断层地面运动/速度脉冲/RC框架/地震反应Key words
near-fault earthquake ground motions/velocity pulse/RC frame/seismic response分类
建筑与水利引用本文复制引用
张莹,孙广俊,李鸿晶..近断层速度脉冲对RC框架的地震反应影响[J].防灾减灾工程学报,2017,37(3):368-373,6.基金项目
国家自然科学基金项目(51308293)、江苏省自然科学基金项目(BK20130937)资助 （51308293）
