基于位移的模块式加筋土挡墙抗震设计方法研究  

Displacement-based seismic design methods of a modular reinforced soil retaining wall

作　　者：李思汉 蔡晓光 景立平 蔡博渊[1] 刘巍巍 马汭锦 LI Sihan;CAI Xiaoguang;JING Liping;CAI Boyuan;LIU Weiwei;MA Ruijin(College of Geological Engineering,Institute of Disaster Prevention,Sanhe 065201,Hebei,China;Key Laboratory of Earthquake Disaster Prevention and Risk Assessment of Hebei Province,Sanhe 065201,Hebei,China;Langfang City Key Laboratory of Research and Application of Geosynthetic Reinforced Soil Structure,Sanhe 065201,Hebei,China;China Earthquake Disaster Prevention Center,Beijing 100029,China;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,CEA,Harbin 150080,Heilongjiang,China;Beijing Construction Engineering Quality Second Inspection Institute Co.,Ltd.,Beijing 100045,China)

机构地区：[1]防灾科技学院地质工程学院,河北三河065201 [2]河北省地震灾害防御与风险评价重点实验室,河北三河065201 [3]廊坊市加筋土结构研发与应用重点实验室,河北三河065201 [4]中国地震灾害防御中心,北京100029 [5]中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [6]北京市建设工程质量第二检测所有限公司,北京100045

出　　处：《地震工程学报》2023年第5期1066-1074,共9页China Earthquake Engineering Journal

基　　金：中央高校基本科研业务费专题项目(ZY20220208,ZY20215107);地震科技星火项目(XH23067YA)。

摘　　要：性态设计是支挡结构工程抗震设计的前沿科学问题。以模块式加筋土挡墙为试验对象,通过振动台试验,探究模块式加筋土挡墙的变形模式;收集归纳挡土墙位移计算方法,分析不同破坏模式下屈服加速度系数分布规律;对比不同计算方法计算值与实测值的一致性。研究结果表明:挡墙的位移模式为平移与转动耦合,且以转动为主;不同破坏模式下安全系数法求解的屈服加速度系数均随输入加速度幅值增大而减小,简便方法和能量法所得屈服加速度系数为常数;将屈服加速度系数代入不同位移计算方法对比,提出在不同峰值加速度时,可分别采用Richards and Elms上限法(0.4g以下)、Cai and Bathurst平均上限法(0.4g~0.6g)、Newmark上限法(0.6g~0.8g)、Whitman and Liao平均拟合法(0.8g~1.0g)进行位移计算。最后,对模块式加筋土挡墙的抗震设计流程进行归纳。Performance-based design is a frontier scientific topic in the seismic design of retaining structures.In this study,the deformation mode of a modular reinforced soil retaining wall(RSRW)was investigated via the shaking table test.The displacement calculation methods of the retaining wall were collected and summarized,and the distribution laws of the yield acceleration coefficient under different failure modes were analyzed.Subsequently,a comparison of the consistency between the measured and calculated values of different calculation methods was done.The findings revealed that the displacement mode of the retaining wall is a rotation-based coupling of translation and rotation;moreover,the yield acceleration coefficients under the different failure modes solved by the safety factor method decrease with increasing input acceleration amplitude,and those obtained by the simple and energy methods are constants.Afterward,the yield acceleration coefficients were substituted into the different displacement calculation methods,and the displacements under different peak accelerations were calculated using the Richards and Elms upper bound method(less than 0.4 g),Cai and Bathurst mean upper bound method(0.4 g-0.6 g),Newmark upper bound method(0.6 g-0.8 g),and Whitman and Liao mean fit method(0.8 g-1.0 g).Finally,the seismic design process of the modular RSRW was summarized.

关 键 词：加筋土挡墙 抗震设计方法 振动台试验 位移计算方法 屈服加速度 

分 类 号：TU375.3[建筑科学—结构工程]