【摘要】 目前钢结构设计难以考虑围护墙体作用,原因是缺乏围护墙板对钢框架抗侧力性能影响的量化研究.采用有限元软件ANSYS建立带有围护墙板钢框架的精细化有限元模型,考虑了墙板节点刚度、墙板之间的接触与摩擦作用、以及墙板的轻质混凝土材料特性,数值模拟结果与试验结果吻合较好.在此基础上,综合考虑轴压比、跨高比、墙板宽度、墙板厚度及墙板开洞形式等关键参数变化的影响,系统研究了带围护墙板钢框架的抗侧力性能.结果表明:当框架柱轴压比在0～0.6变化时,与空框架相比,内嵌墙板钢框架的承载力及初始刚度增大1.0～2.0倍,且在层高一定、跨高比增大时,增大系数呈线性增大;内嵌墙板宽度宜优先选取600 mm;墙板厚度不同时应采用相应的刚度及承载力增大系数;墙体洞口加固后,其对整体结构影响较小,设计时可忽略不计.更多还原

【Abstract】 Currently,the design of steel structure rarely considers the enclosure wall effect and the quantitative research on the enclosure wall is relatively little.In this paper,the refined finite element model of a steel framework with an enclosure wall was first built by finite element analysis software ANSYS.The numerical simulation results meet the experimental results well considering wallboard contact and friction between the roles.Afterwards,lateral performance was analyzed by taking several key parameters into consideration,including the axial compression ratio,span-depth ratio,siding width,siding thickness and wall open-hole area.The results of this study shows that,when axial compression ratio ranges from 0 to 0.6,the enhancement coefficients of bearing capacity and initial stiffness of the framework with siding boards would range from 1.0 to 2.0;with a constant story height,there is linear positive relation between span-depth ratio and enhancement coefficients;the width of infilled-wallboard is advised as 600mm;different enhancement coefficients should be used when different thicknesses of wall is used;when the hole on wall is strengthened,such influence can be ignored during the design as it has little impact on the whole structure.更多还原