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非加劲钢板剪力墙的高阶弹性剪切屈曲分析
High-order elastic shear buckling analysis of unstiffened steel plate shear wall
投稿时间:2019-08-09  修订日期:2019-10-27
DOI:
中文关键词:  非加劲钢板剪力墙  高阶  屈曲  有限元分析
英文关键词:Steel plate shear wall  high-order  buckling  finite element analysis
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
孙国华 苏州科技大学 sungh-529@163.com 
摘要点击次数: 40
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中文摘要:
      非加劲钢板剪力墙(SPSW)结构在水平荷载作用下易屈曲,形成主拉、压应力场,并以拉力带方式提供水平承载力及抗侧刚度。传统拉杆模型(SM模型)用于非加劲SPSW结构分析或设计时忽略压力场的贡献,一般会低估高厚比较小的非加劲SPSW结构的抗侧能力。非加劲SPSW结构在水平力作用下形成多波面外变形与剪力墙板的高阶屈曲相似,可通过在修正的SM模型中引入对应于高阶屈曲的主压应力来反映压力场贡献,提高模型分析精度。本文考虑剪力墙板高厚比和高宽比参数的影响,共设计152个单层、单跨、梁柱铰接、边缘构件无穷刚的非加劲SPSW算例,并进行弹性屈曲分析。分析结果表明高厚比对非加劲SPSW结构的剪切屈曲系数影响不大;随着剪力墙板高宽比的增加,非加劲SPSW结构的剪切屈曲系数呈增大趋势。采用MATLAB程序对152个非加劲SPSW算例的2-5阶剪切屈曲系数结果进行了统计分析,并提出了简化计算公式。
英文摘要:
      The unstiffened steel shear wall (SPSW) structure was prone to occur buckling phenomenon, and developed principle tension and compression field. The lateral strength and lateral stiffness of SPSW was provided by inclined tension field. The traditional strip model was presented to simulate the seismic behavior of SPSW structure through ignoring the contribution of compression field, however, for SPSWs with small height-to-thickness ratio the lateral bearing capacity were underestimated. Especially, the multi-wave out-of-plane deformation of SPSW subjected to cyclic loading was similar to the high-order buckling mode. Therefore, to improve the analytical precise of simplified macro model, the high-order buckling load could be introduced to consider the effect of compression field of SPSW structure. In this paper, a total of 152 single-story, single-span SPSW structures with pinned connections and infinite rigid boundary components were designed through considering the effect of height-to-thickness ratio and height-to-span ratio, and the buckling analysis was performed. The analytical results show that the height-to-thickness ratio has less influence on the shear buckling coefficient of SPSW structure. With the increase of height-to-span ratio, the shear buckling coefficient takes on the increasing tendency. The MATLAB program was adopted for the regression analysis on the high-order shear buckling coefficients of SPSW structures, and the simple calculating formulas was also proposed.
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