宽肢组合异形墙正截面承载力计算方法研究

Research on calculation method of cross-section bearing capacity of specially shaped composite wall with wide-flange

宽肢组合异形墙的正截面承载力的计算可采用平截面假定精确法和借用公式法。借用公式法指修正带钢板混凝土剪力墙的正截面承载力计算公式。平截面精确假定法指基于截面的应力应变分布计算正截面承载力。试算结果表明,同一参数组在同一轴力下,借用公式法计算的弯矩为平截面精确假定法的1.25倍。有限元分析计算的弯矩与借用公式法的弯矩基本吻合。在借用公式法的基础上,进一步修正借用公式,用于计算宽肢组合异形墙的正截面承载力。

Calculation of cross section bearing capacity of specially shaped composite wall with wide flange can adopt accurate method and formula-borrowing method.Formula-borrowing method means to calculate by modifying calculation formula of steel plate concrete composite shear walls,while accurate method means to calculate according to distribution of stress and strain of section.Trial calculation indicates that moment by formula-borrowing method is 1.25 times that by accurate method at the same axial force.Results of finite element analysis basically match that of formula-borrowing method.Formula of formula-borrowing method need further modification to be used to calculate cross section bearing capacity of specially shaped composite wall with wide flange.