非线性准则与张拉裂缝条件下的地震主动土压力研究  

Nonlinear analysis of seismic active earth pressure considering tensile crack conditions

作　　者：彭晓钢 陈锦鸿 陈辉 Peng Xiaogang;Chen Jinhong;Chen Hui(Shenzhen Tagen Group Co.,Ltd.,Shenzhen 518034,China;School of Civil Engineering,Central South University,Changsha 410075,China)

机构地区：[1]深圳市天健(集团)股份有限公司,广东深圳518034 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《湖南文理学院学报（自然科学版）》2021年第2期90-95,共6页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：中国博士后科学基金(2020M682918)。

摘　　要：基于极限分析的运动学方法,在非线性和地震效应条件框架下,分析土体对刚性挡土墙的作用力,张拉裂缝对主动土压力的数值影响也被考虑在本文中。为了得到一个相对保守的解,拟静力法被用来评估地震的强度效应。根据上限法的基本原则构建功—能平衡方程,即外荷载所做的总功等于内部的能量耗损率,得到主动土压力的表达式,利用数值分析软件计算出最不利的解。最后优化评估非线性条件的相关参数及水平地震系数对于刚性挡土墙的影响,并绘制了相应的设计图表。Based on the kinematic approach of limit analysis,this paper proposes to analyze the force of soil on the rigid retaining wall under the nonlinear conditions and seismic effects.The numerical influence of tensile crack on active earth pressure is also considered in this paper.In order to obtain a relatively conservative solution,the pseudo-static method is employed to evaluate the intensity effect of the earthquake.According to the basic principle of the upper-bound method,the work-energy balance equation was constructed,and that is,the total work rates done by external loads are equal to the internal energy dissipation.The expression of active earth pressure is obtained,and the most unfavorable solution can be calculated by using numerical analysis software.Finally,the influence of the nonlinear parameters and the horizontal seismic coefficient on the rigid retaining wall is optimized and evaluated,and the corresponding design chart is drawn.

关 键 词：非线性 裂缝 主动土压力 拟静力法 

分 类 号：TU476.4[建筑科学—结构工程]