考虑粘结作用及抗剪栓钉传力的巨型钢管混凝土柱共同工作性能分析

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英文篇名：Analysis of co-working performance of giant concrete filled steel tubular columns considering bonding effect and shearing stud force 作者：张元植 ; 罗金辉 ; 李元齐 英文作者：Zhang Yuanzhi;Luo Jinhui;Li Yuanqi;Sichuan Institute of Building Research;Department of Structural Engineering, College of Civil Engineering, Tongji University; 关键词：巨型钢管混凝土柱 ; 荷载传递路径 ; 粘结作用 ; 抗剪栓钉传力 ; 共同工作性能 英文关键词：giant concrete filled steel tubular columns;;load transfer path;;bond;;load transferred by shear stud;;co-working performance 中文刊名：JCJG 英文刊名：Building Structure 机构：四川省建筑科学研究院;同济大学土木工程学院建筑工程系; 出版日期：2019-03-10 出版单位：建筑结构 年：2019 期：v.49;No.497 基金：国家自然科学基金(51208375) 语种：中文; 页：JCJG201905018 页数：9 CN：05 ISSN：11-2833/TU 分类号：114-121+129

摘要

采用数值模拟手段对考虑粘结作用及抗剪栓钉传力的巨型钢管混凝土柱共同工作性能进行分析。首先介绍了ABAQUS程序中的材料本构模型、钢管、混凝土界面模型和抗剪栓钉简化本构模型。通过与相关文献试验结果进行对比,充分验证了本文理论模型的合理性与精确度。在此基础上,分别对只考虑粘结作用的巨型钢管混凝土柱和考虑粘结作用+抗剪栓钉的巨型钢管混凝土柱进行数值参数分析,主要考察巨型柱截面尺寸、管壁宽厚比、粘结强度、栓钉布置间距等对竖向荷载传递的影响。结果表明,粘结作用对混凝土共同工作性能的影响有限,单纯依靠粘结传力,钢管、混凝土两者不能够很好地共同工作;设置抗剪栓钉提高了巨型钢管混凝土柱共同工作性能。最后建议不应完全依赖粘结作用与抗剪栓钉传力,在设计时应通过设置足够的传力构造来保证巨型柱钢管、混凝土共同工作。
        Co-working performance of giant concrete filled steel tubular(CFT) columns was analyzed by finite element method,which considering the influence of bond strength and shear stud. Firstly, the constitutive model of material, interaction of concrete and steel and the simplified constitutive model of shear stud in finite element software ABAQUS was introduced. Secondly,the simulation result was compared with the experimental result of relative literature, which verified the reasonableness and accuracy of simulation result. Furthermore, parametric analysis on giant CFT columns considering nature bond, nature bond and shear stud was conducted. The factors including the size of giant CFT columns,width to thickness ratio of steel tube,the value of bond strength and spacing of stud were considered, and the influence of these factors on load transfer between core concrete and steel tube was investigated. It shows that the numerical simulation work that core concrete in giant CFT columns could barely work together with steel tube simply by nature bond. The co-working performance was enhanced after the shear stud was set on the inner surface of steel tube. At last, it was suggested that load transfer in giant CFT columns should not only simply depended on nature bond and shear stud. The design should be done by setting enough force transmission structure to ensure that the giant column steel pipe and concrete work together.

引文

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