框架预应力锚杆支护结构地震永久位移计算  

Calculation of Permanent Seismic Displacement of Frame Prestressed Bolt Support Structure

作　　者：刘东汉 LIU Donghan(Gansu Wuhuan Highway Engineering.,Ltd,Lanzhou Gansu 730050,China)

机构地区：[1]甘肃五环公路工程有限公司,甘肃兰州730050

出　　处：《甘肃科技纵横》2024年第5期66-73,共8页Scientific & Technical Information of Gansu

摘　　要：地震永久位移是评定结构抗震性能和安全性能的关键因素,尤其是对框架预应力锚杆支护结构这种复杂的柔性支护结构来说更加关键,其数值取决于结构的材料特性、形式及地震作用的强度等因素。因此,研究支护结构在地震作用下的永久位移对提高支护结构的抗震能力具有重要作用。文章针对框架预应力锚杆支护结构地震永久位移的计算方法展开研究,探究了该结构在地震作用下的变形规律和抗震能力,提出了关于永久位移可行性计算方法。文章主要运用拟静力法、极限分析上限法等理论计算方法,利用极限分析上限法推导得出了框架预应力锚杆支护结构地震屈服加速度,并根据该参数计算了结构的地震永久位移。通过MATLAB编程软件理论计算公式进行计算,并与数值模拟分析结果进行对比,验证了公式的有效性与正确性,可为支护设计提供一定的依据。The seismic permanent displacement is a key factor to evaluate the seismic performance and safety performance of the structure,especially for the complex flexible support structure such as the frame prestressed bolt support structure,and its value depends on the material properties of the structure,the form and the strength of the seismic action.Therefore,studying the permanent displacement of the support structure under the action of earth⁃quake has an important influence on improving the seismic capability of the support structure.This paper studies the calculation method of the seismic permanent displacement of the prestressed anchor structure of the frame,ex⁃plores the deformation rule and seismic capability of the structure under the action of earthquake,and puts forward the feasibility calculation method of the permanent displacement.This paper mainly uses the pseudo-static method,limit analysis upper limit method and other theoretical calculation methods to derive the seismic yield acceleration of the frame prestressed bolt support structure,and calculates the seismic permanent displacement of the structure according to the parameter.The theoretical formula is calculated by MATLAB programming software,and the re⁃sults are compared with the numerical simulation analysis to verify the effectiveness and correctness of the formula,which can provide a certain basis for the support design.

关 键 词：框架预应力锚杆 支护结构 极限分析上限法 地震永久位移 有限元模拟 

分 类 号：TU432[建筑科学—岩土工程]