基于剪力比的自复位支撑结构体系主体框架设计

Design for main frame of self-centering braced structuresystem based on shear force ratio

为了解决自复位支撑结构体系中支撑与主体框架的匹配性问题,提出一种基于剪力比的自复位支撑结构体系主体框架初步设计方法。根据不同的复位比和剪力比,设计了多组SCBRB钢框架结构,通过结构模型的反应谱分析和弹性时程分析,确定了剪力比的合理取值范围和主体钢框架弹性层间位移角限值的建议取值。研究结果表明,剪力比的合理取值范围为0.3~0.5;当剪力比为0.3、0.4、0.5时,主体钢框架弹性层间位移角限值的建议取值分别为1/263、1/238、1/217。

This paper proposes a preliminary design scheme of the main frame of self-centering braced structure system based on shear force ratio designed to address the mismatching problem between brace and main frame in self-centering braced structure system.According to different self-centering ratio and shear force ratio,the study involves designing several groups of SCBRB steel frame structures,and determining the reasonable range of shear force ratio and the suggested limit value of elastic inter-story displacement angle of the main steel frame through the response spectrum analysis and elastic time history analysis of the structural model.The results show that the reasonable value range of shear force ratio is 0.3-0.5;and with the shear force ratio of 0.3,0.4 and 0.5,the suggested limit values of elastic inter-story displacement angle of main steel frame are 1/263,1/238 and 1/217,respectively.