实腹式型钢混凝土柱延性系数分析

来源期刊:中南大学学报(自然科学版)2008年第1期

论文作者:郭健 何益斌 肖阿林

文章页码:196 - 196

关键词:实腹式型钢混凝土柱;曲率;位移;延性系数;塑性铰

Key words:full-web type SRC column; curvature; displacement; ductility factor; plastic hinge

摘    要:在平截面假定及对截面应力分布进行合理简化的基础上,依据截面材料的应力-应变关系及构件曲率分布规律,采用现有塑性铰计算模型分别得出各受力阶段实腹式型钢混凝土柱截面组成材料的合力,进而推导出各受力阶段截面曲率、弯矩及挠度的计算公式,建立单调荷载下实腹式型钢混凝土柱曲率及位移延性系数的表达式,同时对其影响参数进行分析。理论计算与试验结果对比表明,曲率及位移延性系数计算值与试验结果吻合良好,说明所提出的方法及推导的实腹式型钢混凝土柱延性系数计算表达式能较好地反映实际情况。

Abstract: Based on the plane-section assumption and simplified stress distribution of the composite section, the resultant normal forces of cross-section of full-web steel reinforced concrete (SRC) columns in different load levels were presented according to stress-strain relationships of composite section. Then, the curvature, moment and deflection of the composite columns of every loading phase were deduced respectively by using existing plastic hinge calculation model. The curvature and displacement ductility factors of the composite columns under monotonous loading were obtained. The comparison of the results between calculation and tests shows that the calculated curvature and displacement ductility factors are in good agreement with test data. It is said that the method and the expressions of ductility factors proposed can well represent the actual character of full-web SRC columns.

基金信息:湖南省杰出青年基金资助项目

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