方钢管自密实混凝土加固RC方柱偏压性能有限元分析

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英文篇名：Finite element analysis of the behavior of square RC columns strengthened with concrete-filled square steel tube under little eccentric compression 作者：卢亦焱 ; 肖羚玮 ; 李杉 ; 梁鸿骏 英文作者：LU Yiyan;XIAO Lingwei;LI Shan;LIANG Hongjun;School of Civil Engineering,Wuhan University; 关键词：方钢管自密实混凝土 ; 钢筋混凝土方柱 ; 结构加固 ; 偏心受压 ; 有限元分析 英文关键词：self-compacting concrete-filled square steel tube;;reinforced concrete square column;;structure reinforcement;;eccentric compression;;finite element analysis 中文刊名：HLTF 英文刊名：Concrete 机构：武汉大学土木建筑工程学院; 出版日期：2019-05-27 出版单位：混凝土 年：2019 期：No.355 基金：国家自然科学基金(51078294);; 湖北省技术创新专项重大项目(2016AAA025) 语种：中文; 页：HLTF201905006 页数：6 CN：05 ISSN：21-1259/TU 分类号：20-25

摘要

在7根方钢管自密实混凝土组合加固柱和1根未加固RC方柱小偏心受压试验研究基础上,利用ABAQUS软件进行有限元计算,研究组合加固柱的工作机理,分析外套钢管厚度、偏心距和后浇混凝土强度等参数对加固柱受力性能的影响规律。结果表明:随着荷载的增大,混凝土的应力在试件的角部位置逐渐达到最大。外套钢管的厚度越大,试件的极限承载力越大,结构延性越好;偏心距越大,试件的极限承载力越小,延性越差;后浇混凝土强度对试件极限承载力的影响不明显,后浇混凝土强度越高试件的延性越差。
        Based on a little eccentric compression experiment of 1 square RC column and 7 columns strengthened with concrete-filled square steel tube,the effect of steel tube thickness,eccentricity and new concrete strength on mechanical properties of the member was analyzed by finite element method used ABAQUS software.The results shows that,with the increase of load,the longitudinal stress of concrete reach the maximum at the corner of the specimen.With the increase of the thickness of the steel tube,the ultimate bearing capacity of specimens increases and the ductility improves.With the increase of eccentricity,the ultimate bearing capacity and the ductility of specimens decreases.The strength of new concrete has no obvious influence on the ultimate bearing capacity of the specimens,and the ductility decrease as the strength of new concrete increases.

引文

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