HRB500钢筋混凝土Z形截面双向压弯柱正截面承载力数值分析

发布时间：2018-02-09 11:22

本文关键词： 钢筋混凝土柱 Z形截面 HRB钢筋双向压弯数值分析正截面承载力　出处：《建筑结构学报》2014年S1期 　论文类型：期刊论文

【摘要】：为研究HRB500钢筋混凝土Z形截面双向压弯柱的受力性能,采用Fortran语言编制Z形截面双向压弯柱承载力有限元计算程序,基于已进行的9根钢筋混凝土Z形截面柱试件反复加载试验结果,对程序的正确性进行验证,试验结果与计算结果吻合较好。分析了加载角度、混凝土强度等级、纵筋配筋率、轴压比和肢高肢厚比等参数对承载力的影响,得到了Z形截面双向压弯柱正截面轴力-弯矩(N-M)及双向弯矩(Mx-My)相关曲线的变化规律。研究结果表明:在轴压比、纵筋配筋率、肢高肢厚比满足限值的条件下,界限破坏时,混凝土强度等级由C45提高到C60,受弯承载力提高15.1%,受压承载力提高21.1%;配筋率由1.57%提高到2.26%,受弯承载力提高15%,受压承载力降低10.8%,加载角度对界限破坏点没有影响。配置HRB500纵筋Z形截面柱,混凝土强度等级不宜小于C50。
[Abstract]:In order to study the mechanical behavior of HRB500 reinforced concrete biaxial compression columns with Z section, a finite element program for calculating the bearing capacity of Z shaped columns is compiled by using Fortran language. Based on the repeated loading test results of 9 reinforced concrete Z-section columns, the correctness of the program is verified. The experimental results are in good agreement with the calculated results. The loading angle, the strength grade of concrete and the reinforcement ratio of longitudinal reinforcement are analyzed. The influence of axial compression ratio and limb height to limb thickness ratio on the bearing capacity is obtained. The variation rules of axial force-bending moment N-M) and Mx-Myx curves of biaxial compression column with Z section are obtained. The results show that the ratio of longitudinal reinforcement to axial compression ratio, the reinforcement ratio of longitudinal reinforcement, and so on. If the ratio of limb height to limb thickness meets the limit, when the limit is broken, The strength grade of concrete is increased from C45 to C60, the flexural bearing capacity is increased by 15.1and the compressive bearing capacity is increased by 21.1.The reinforcement ratio is increased from 1.57% to 2.26, the flexural bearing capacity is increased by 15, the compressive bearing capacity is reduced by 10.8, and the loading angle has no effect on the limit failure point. Z section column with HRB500 longitudinal reinforcement, Concrete strength grade should not be less than C50.
【作者单位】：浙江工业大学建筑工程学院;
【基金】：国家自然科学基金项目(50879079) 住房和城乡建设部规程修订项目
【分类号】：TU375

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