【摘要】 非规则荷载下土体残余应变发展模型是一个目前仍在探索的问题,现有的土层时域积分方法难以考虑土体的残余应变效应。阐述了一种在规则和非规则荷载下土体残余应变的表示方法,将其与双曲线型动态骨架曲线相结合,推导出一种能较好考虑非规则荷载下残余应变效应且方便程序实现的土体应力–应变关系。将此土体应力–应变关系应用于土层地震反应时域积分方法中,获得了一种考虑土体残余应变效应的时域积分方法,基于MATLAB平台编制了RS-DYMATLAB计算程序。利用实验数据对方法进行了验证,结果表明,本方法是一种合理可行的、能较好地考虑土体的残余应变效应的土层地震反应分析方法。更多还原

【Abstract】 The soil residual strain increase model under irregular loads is still an issue to be explored.Existing time-domain integral method is difficult to consider the residual strain effects of soils.A description method of soil residual strain under regular or irregular loads is expounded and combined with the hyperbolic dynamic skeleton curve,a new soil stress-strain relations is deduced,which can consider residual strain well and facilitate programming.Futhermore,this new stress-strain relation is applied in the time-domain integral method of soil layer response analysis to obtain a new time-domain integral method which can consider residual strain effects and a corresponding calculation procedure RS-DYMATLAB program is compiled on the MATLAB platform.Some real experimental data are used to verify this method,and the results show that this method can consider the residual strain effects of soils well,and can be applied as a reasonable and feasible method for nonlinear site response analysis of soil layers.更多还原