型钢混凝土十字形异形柱正截面承载力计算方法  

Analysis of Normal Section Bearing Capacity of Concrete-encased Steel Crossshaped Columns

作　　者：方林[1] 李承铭[1] 杨敏 FANG Lin;LI Chengming;YANG Min(East China Architectural Design&Research Institute Co.,Ltd.,Shanghai 200041,China)

机构地区：[1]华东建筑设计研究院有限公司,上海200041

出　　处：《水利与建筑工程学报》2023年第5期163-170,共8页Journal of Water Resources and Architectural Engineering

基　　金：上海市社会发展科技攻关项目(21DZ1203401)。

摘　　要：为研究型钢混凝土十字型异形柱承载力计算方法,根据已完成的低周反复荷载试验及有限元分析,并考虑箍筋约束作用编制截面弯矩-曲率关系计算程序,对试件正截面承载力进行计算,并分析不同参数对型钢混凝土十字异形柱正截面承载力的影响。结果表明:计算结果与试验结果和有限元分析结果吻合较好。随着混凝土强度、配钢率、型钢屈服强度的增大,正截面承载力增大;随着配箍特征值的增大,正截面承载力增大,但增大幅度较小;不同轴压力、荷载角对正截面承载力的影响规律不同。型钢混凝土十字型异形柱与混凝土十字型异形柱相比,正截面承载力有较大提高。分析方法和计算程序有效、稳定、精确,能较为准确地预测型钢混凝土十字型异形柱正截面承载力。According to the completed low cyclic loading test and finite element analysis,the analysis program of the section bending momentcurvature relationship is compiled considering the effect of hoop reinforcement in order to study the calculation method for the normal section bearing capacity of concreteencased steel crossshaped columns.The normal section bearing capacity of the specimens is calculated using the compiled program.The influence of different parameters on the normal section bearing capacity of concreteencased steel crossshaped columns is systematically studied.The research results show that the program calculation results are in good agreement with the test results and finite element analysis results.With the increase of concrete strength,steel ratio and yield strength of steel,the normal section bearing capacity increases;with the increase of characteristic value of stirrup spacing,the normal section bearing capacity increases,but the increase amplitude is small;with the different axial loads,the influence law of load angle on the normal section bearing capacity is different.Compared with reinforced concrete crossshaped columns,the normal section bearing capacity of concreteencased steel crossshaped columns has been greatly improved.The analysis method and calculation program are effective,stable and accurate,and can predict the normal section bearing capacity of concreteencased steel crossshaped columns more accurately.

关 键 词：型钢混凝土十字形异形柱 正截面承载力 截面弯矩-曲率关系 约束混凝土 

分 类 号：TU398.2[建筑科学—结构工程] TU317.1