自复位方钢管混凝土框架-薄钢板剪力墙结构的水平边缘构件受力分析

摘要

基于薄钢板剪力墙在目标位移下充分屈服并形成拉力带,对绕梁腹板销轴转动的自复位方钢管混凝土框架-薄钢板剪力墙结构的水平边缘构件(中梁和顶梁)进行受力分析.分别对水平边缘构件在钢绞线预应力和薄钢板剪力墙拉力带作用下的受力进行分析,推导了钢绞线在目标位移下的拉伸预应力计算公式;基于薄钢板剪力墙极限破坏形态,研究了薄钢板剪力墙拉力带产生的水平边缘构件端部的轴力和剪力;提出了水平边缘构件的弯矩、剪力及轴力计算公式,明确了水平边缘构件的内力分布.结果表明:水平边缘构件内力公式计算值与有限元分析值吻合较好,可为水平边缘构件的设计提供参考.%Based on the full yield of thin steel plate shear wall and the formation of tensile strip, force analysis was conducted for the horizontal boundary elements (middle beam and top beam) of self-centering concrete filled square steel tubular frame with thin steel plate shear walls, which rolled about the pin of the web.The forces of the horizontal boundary elements were studied under the pre-stressing of the strands and the tensile strip of the thin steel plate shear walls, respectively.The calculation formula of the tensile stress was derived under the target drift.Based on the ultimate failure mode of thin steel plate shear wall, the axial forces and shear forces of the horizontal boundary element in the ends were studied.The calculation formula of the bending moment, shear force and axial force of the horizontal boundary elements were proposed.The distribution of the internal force of the horizontal boundary element was defined.The results show that the calculation results of the formula agree well with the finite element results.