交替协调子结构混合试验方法研究

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英文篇名：RESEARCH ON STAGGERED COORDINATION APPLICATION IN HYBRID TEST METHODS 作者：杜春波 ; 王涛 ; 郄毅 英文作者：DU Chun-bo;WANG Tao;QIE Yi;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,CEA; 关键词：在线混合试验 ; 子结构 ; 交替协调 ; 边界协调 ; 混凝土框架 英文关键词：online hybrid test;;substructure;;staggered coordination;;boundary coordination;;RC frame 中文刊名：GCLX 英文刊名：Engineering Mechanics 机构：中国地震局地震工程与工程振动重点实验室中国地震局工程力学研究所; 出版日期：2019-06-20 出版单位：工程力学 年：2019 期：v.36 基金：广州省地震工程与应用技术重点实验室开放基金项目(2014B030301075);; 国家自然科学基金项目(51678538);; 中国地震局工程力学研究所基本科研业务费专项(2016B09,2016A06,2017A02) 语种：中文; 页：GCLX2019S1009 页数：5 CN：S1 ISSN：11-2595/O3 分类号：58-62

摘要

该文提出一种静态与动态分离的在线混合试验框架,其中动力方程由时间积分算法得出,回复力由对子结构的静力加载得出。混合试验中,数值子结构和试验子结构之间的边界协调问题是试验成功与否的关键。该文提出一种交替协调的边界近似协调方法,数值子结构边界上的位移由上一步的试验子结构提供,而获得的边界上的力用于这一步的试验子结构的加载。将该方法应用于六层菱形BRB加固的混凝土框架中,通过数值验证,这种近似的边界协调方式引入的误差可以忽略。尽管这不是一种精确的边界处理方式,但它使子结构混合试验的实施变得更加简单且灵活。
        This paper proposed an online hybrid test framework using a static and dynamic separated model scheme, where the equations of motion are solved by the operator-splitting(OS) algorithm and the restoring force is obtained from a static analysis or quasi-static test of substructures. The boundary coordination between the numerical and physical substructure is one of the keys to achieve a hybrid test. This paper proposed a staggered coordination method to coordinate the boundary conditions approximately, in which the displacements of boundaries in the numerical substructure in the current step are measured in the physical substructure in the last step and force analyzed results of the numerical substructure are then exerted on the boundaries of physical substructure for loading. The method was applied to a six floor RC frame retrofitted by double-K BRBs. The error caused by the approximation were confirmed to be negligible through numerical verification. Although this is not an accurate method, it makes hybrid tests easier and more flexible.

引文

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