非加劲钢板剪力墙抗剪承载力参数分析

摘要

In order to suggest the in-plane and out-plane stiffness requirement of the boundary column,this paper researched the shear strength with un-stiffened steel plate shear wall( short for SPSW) under the action of lateral force, with the analysis of the column influenced by the factors which included the in-plane and out-plane stiffness of the boundary column, height-thickness ratio A and span-height ratio L/h for the property of un-stiffened were researched,and the analysis was based on the FEA results by finite element software, ANSYS. The requirement for the boundary column of the in-plane parameter was suggested not bigger than 2. 5 ,and the ratio of in-plane and out-plane stiffness should not be less than 0.2. Based on this,the parameter analysis for the factors of height-thickness ratio A and span-height ratio L/h was carried out. The results calculated by FEA and the existing code in China were compared, which showed that there was a certain large potential for taking use of the capacity of un-stiffened SPSW. The form of suggested requirement for the boundary column of the in-plane and out-plane stiffness was simple and reasonable, which can be used in designing the boundary column. The design method of taking use of the post buckling shear strength for un- stiffened thin SPSW needs a further analysis and research.%目的 研究非加劲钢板剪力墙在侧向荷载作用下墙板的抗剪承载力,对钢板剪力墙边缘柱面内、面外刚度进行分析,为编制其设计方法提供理论依据.方法 利用通用有限元软件ANSYS建立有限元模型,以参数分析方式研究了柱面内、面外刚度,高厚比λ以及跨高比L/h三个主要因素对墙板承载力的影响,并进行对比分析.结果 建议非加劲钢板剪力墙与墙板相连边缘柱面内刚度ωh≤2.5、面外刚度/面内刚度≥0.2;在此基础上进行高厚比、跨高比因素影响下的参数分析,将有限元结果与现有中国规范计算结果进行对比,结果表明非加劲薄钢板剪力墙仍有较大潜力可以利用.结论 笔者建议边缘柱面内、面外刚度形式简单合理,可用于设计时边缘柱的构造需求;现有规范设计方法大大低估了非加劲薄钢板剪力墙的承载力存在不足.