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利用OpenSEES有限元程序,研究了轴拉比、型钢强度、纵筋强度、混凝土强度、型钢翼缘面积、型钢腹板厚度、型钢腹板高度、纵筋面积以及截面尺寸等因素对工字型钢混凝土偏心受拉构件正截面承载力的影响。结果表明:截面中型钢翼缘面积、型钢腹板高度、型钢腹板宽度、纵筋配筋率以及截面高度对偏拉构件正截面承载力的影响较大;型钢强度、纵筋强度对承载力的影响相对较小;混凝土强度、构件截面宽度对承载力基本没有影响。将JGJ 138—2012《组合结构设计规范》中型钢混凝土偏拉构件正截面承载力计算公式的计算结果与OpenSEES非线性有限元的计算结果进行了对比,提出了对规范公式的修正建议,并利用有限元模拟结果对修正后的计算公式进行了检验,二者吻合良好。
OpenSEES finite element program was used to study the effects of shaft tension ratio, section strength, longitudinal strength, concrete strength, profiled steel flange area, profile web thickness, profile web web height, Eccentricity Tensile Element Normal Section Bearing Capacity. The results show that the influence of section area, the web height, the web width, the reinforcement ratio of longitudinal reinforcement and the section height have a significant influence on the normal section bearing capacity of the section; Of the impact is relatively small; concrete strength, the width of the cross-section of the bearing capacity of the basic no impact. The calculation results of the normal section bearing capacity formula of the intermediate steel reinforced concrete members of JGJ 138-2012 “Combined Structural Design Code” are compared with those of the OpenSEES nonlinear finite element, and the suggestions for the correction of the standard formula are put forward. Finite element simulation results of the revised formula was tested, the two agree well.