框架锚索加固边坡地震响应的动力计算方法浅析  

Discussion on Dynamic Calculation Method of Seismic Response for Slope Reinforced by Anchored Frame

作　　者：王东 刘蕾蕾 余强 邱毅 牛家永 WANG Dong;LIU Leilei;YU Qiang;QIU Yi;NIU Jiayong(Sichuan Highway Planning,Survey,Design and Research Institute Ltd,Chengdu 610041 China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]四川省公路规划勘察设计研究院有限公司,成都610041 [2]西南交通大学土木工程学院,成都610031

出　　处：《公路交通技术》2021年第1期9-13,20,共6页Technology of Highway and Transport

基　　金：四川省交通科技项目(2015A1-9,2016B2-2)。

摘　　要：为研究框架锚索边坡锚固结构的地震反应和工作机制,克服拟静力分析不能考虑地震时程的不足,提出了可考虑地震过程中锚索轴力残余值改变的锚索动轴力计算方法。基于多自由度体系的集中质量法,建立了框架锚索加固边坡时锚索轴力响应值的理论解,并将其与框架锚索加固边坡的振动台模型试验结果进行了对比。结果表明:1)计算方法具有合理性和正确性;2)该计算模型考虑了地震动参数、岩土体参数及锚固结构设计参数的影响,为地震波作用下锚索轴力动态响应值的计算提供一种新方法。In order to study the seismic response and working mechanism of the anchorage structure of the anchored frame slope,and to overcome the shortcoming that quasi-static analysis can not consider seismic time history,a calculating method for the dynamic axial force of anchor cable which considers the change of residual axis force during the earthquake was proposed.Based on the concentrating mass method of multi-degree-of-freedom system,theoretical solution of elastic response value of axial force of anchored frame slope was established.It was compared with the test results of shaking table model of the anchored frame slope.The results show that the calculating method is resonable and correct,which takes into account the influence of seismic parameters,geotechnical parameters and anchorage structure design parameters,which can provide a new theoretical calculating method for calculating the dynamic response value of axial force of anchor cable under seismic wave action.

关 键 词：边坡工程 框架锚索 地震作用 动力计算模型 轴力响应 

分 类 号：U418.5[交通运输工程—道路与铁道工程]