钢框架内填再生混凝土墙结构等效模型分析  

Equivalent model analysis of steel frame structure with recycled concrete infilled wall

作　　者：孙立建 郭宏超[1] 刘云贺[1] 刘杰 SUN Lijian;GUO Hongchao;LIU Yunhe;LIU Jie(School of Civil Engineering and Architecture,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710048

出　　处：《西安理工大学学报》2018年第3期264-271,共8页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51308454);中国博士后科学基金资助项目(2013M542371);陕西省博士后自然科学基金资助项目;陕西省住建厅建设科技专项资助项目(2014-K12)

摘　　要：为得到钢框架内填再生混凝土墙结构的简化分析模型,对其在水平荷载作用下的受力性能进行分析,在明确内填墙板传力特点及裂缝分布的基础上,将钢框架内填再生混凝土墙结构等效为斜向板带模型,并采用有限元方法对整体模型及不同板带数量的斜向板带模型进行了分析。结果表明:有限元整体模型的初始刚度及极限承载力均略高于试验模型,峰值荷载之后承载力下降较小;当板带数=4~6时,斜向板带模型在加载后期承载力无下降;当板带数=7~9时,在加载后期承载力有大幅度下降,极限承载力均略高于试验模型,荷载位移曲线与试验曲线吻合较好;通过对不同高跨比、内填墙板厚度及混凝土强度的参数扩展分析,确定了钢框架内填再生混凝土墙结构斜向板带模型板带数的合理取值为≥7,且随着结构高跨比的减小、内填墙板厚度的增加和再生混凝土强度的提高而适当增加。To establish the simplified analysis model of the steel frame structure with recycled concrete infilled wall,the mechanical performance of the structure is analyzed under the lateral loading.According to the force-transfer mechanism and the crack distribution of infilled wall,it is equivalent to the diagonal strip model,with the finite element software adopted to analyze the whole model and the diagonal strip model with different strip numbers.The results show that the initial stiffness and ultimate load-carrying capacity of the finite element model are slightly higher than those of the experimental specimen,with the bearing capacity declining slowly after peak load.When the number of the strip is 4～6,there is no decrease in the bearing capacity of the diagonal strip model at the later loading stage.When the number of the strip is 7～9,its bearing capacity fell meaningfully at the later loading stage and ultimate load-carrying capacity is slightly higher than that of the experiment,but the load-displacement curves are in well agreement.From the parameters as different high span ratios,thickness of infilled wall and strength grade of concrete are taken to be systematically analyzed,with the reasonable value of the number of the strip of diagonal strip model of steel frame structure with recycled concrete infilled wall being greater than or equal to 7,and it should be increased to some extent with the decrease of the high span ratio,the increase of the thickness of the infilled wall and the improvement of the recycled concrete strength.

关 键 词：钢框架 内填墙板 再生混凝土 斜向板带模型 有限元分析 

分 类 号：TU398.3[建筑科学—结构工程]