复杂动力作用下加筋土挡墙内部稳定性分析  

Interior Stability Analysis of Reinforced Earth Retaining Wall under Complicated Dynamical Loads

作　　者：蒋建清[1] 邹银生[2] 

机构地区：[1]湖南城市学院土木工程学院,湖南益阳413000 [2]湖南大学结构工程研究所,湖南长沙410082

出　　处：《中南公路工程》2007年第1期51-54,共4页Central South Highway Engineering

摘　　要：从加筋土挡土墙的特殊受力机理出发,对水平和竖向地震同时作用下加筋土挡墙进行了内部稳定性分析;研究了挡墙破裂面形状与位置,结合国内外一系列室内和现场足尺试验资料而确立了地震作用下加筋土挡墙的分析模型;通过挡墙的筋带拉断破坏和筋土粘着破坏分析,分别推导了加筋带的界限配筋率和临界长度计算公式,这两个公式能适用于多种实际的荷载工况(静力荷载和地震荷载),公式计算结果与试验结果吻合良好,可为加筋土挡土墙工程抗震设计及动力分析提供一定参考。Based on the special mechanism of reinforced earth retaining wall, this paper introduces the interior stability theory of reinforced earth retaining wall under horizontal and vertical seismic loads. The shape and location of the failure surface of retaining wall is also studied. Be based upon a series of laboratory experimentations and field examinations, this paper establishs an unified analysis model in order to analyse reinforced retaining wall under seismic loads Through the analysis of the rupture of reinforced bar and its adhesive invalidation, formulas about the relative minimal reinforcement volume ratio and the minimal reinforcement length are deduced, respectively. The two formulas are applicable to various load cases （static load case and seismic load case）, the results are in accord with experimentation results well. Therefore, they can give a reference for practical reinforced earth retaining wall designs and its dynamical analysis.

关 键 词：加筋土挡土墙 临界长度 界限配筋率 水平和竖向地震作用 分析模型 内部稳定性分析 

分 类 号：U417.11[交通运输工程—道路与铁道工程]