工字型钢混凝土偏心受拉构件正截面承载力计算

发布时间：2018-04-30 23:31

本文选题：型钢混凝土偏拉构件 + 工字型钢　；参考：《建筑结构学报》2017年02期

【摘要】：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。
[Abstract]:OpenSEES finite element program is used to study the axial ratio, section strength, longitudinal reinforcement strength, concrete strength, section steel flange area, section steel web thickness, section steel web height, etc. The influence of longitudinal reinforcement area and section size on the normal section bearing capacity of I-shaped steel concrete eccentrically tensile members. The results show that the flange area of section steel, the height of web plate, the width of web plate, the reinforcement ratio of longitudinal reinforcement and the height of section have great influence on the bearing capacity of normal section of eccentric tensile member. The influence of longitudinal reinforcement strength on the bearing capacity is relatively small, while the strength of concrete and the section width of members have no effect on the bearing capacity. The calculation results of normal section bearing capacity of SRC eccentric tensile members in JGJ 138-2012 Code for Composite structure Design are compared with those of OpenSEES nonlinear finite element method, and some suggestions for revising the formula are put forward. The results of finite element simulation are used to test the modified formula and the results are in good agreement with each other.
【作者单位】：重庆大学山地城镇建设与新技术教育部重点实验室;四川省建筑设计研究院;
【基金】：国家自然科学基金项目(51378519)
【分类号】：TU398.9

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