摘要
本研究提出了一种新型的钢管混凝土斜柱转换结构节点。该节点由核心混凝土、纵横向钢板、外包钢和内置型钢组成。对1个几何比例为1:6的试件进行单调加载试验,并通过数值模拟研究节点区的破坏模式,对节点区钢板的厚度变化进行参数分析。试验研究结果表明,试件的破坏发生于斜柱,可满足“强节点、弱构件”的设计理念。数值模拟结果进一步揭示了节点区的传力机理,计算结果表明,节点区的破坏模式为钢材基本达到屈服、节点区底部混凝土达到极限压应变;节点区极限承载力和屈服荷载分别为斜柱破坏计算模型的2.10倍和1.19倍;起传递轴向内力和约束节点区混凝土作用的外包钢板的厚度变化对计算模型节点区的极限承载力影响最大。
A new type of transferring joint with concrete filled steel tubular inclined columns was proposed in this study.The joint is composed of core concrete,longitudinal and horizontal steel plates,external steel plates and built-in profiled steel.The monotonic loading test of a specimen with geometric ratio of 1:6 was carried out.Then the failure mode of the joint zone was studied through numerical simulation,and the parameter analysis on the thickness of the steel plates in the joint zone was conducted.The experimental results show that the failure of the specimen occurs in the inclined columns,so it can meet the design concept of“strong joint and weak component”.The numerical simulation results further reveal the force transfer mechanism of the joint zone.The calculation results show that the failure mode of the joint zone is that the steel plates basically reach yield and the concrete at the bottom of the joint zone reaches the ultimate compressive strain.The ultimate bearing capacity and yielding load of the joint zone are 2.10 times and 1.19 times of those of the numerical model in which the inclined columns fail at first,respectively.The thickness variation of the external steel plates,which can transfer axial internal force and confine the concrete,has the greatest influence on the ultimate bearing capacity of the joint zone.
作者
黄少腾
黄炎生
莫庭威
左志亮
汤序霖
张增球
蔡健
HUANG Shaoteng;HUANG Yansheng;MO Tingwei;ZUO Zhiliang;TANG Xulin;ZHANG Zengqiu;CAI Jian(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China;Guangzhou Jishi Construction Group Co.,Ltd.,Guangzhou 510115,Guangdong,China;Architectural Design and Research Institute of Guangdong Province,Guangzhou 510010,Guangdong,China)
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第3期44-54,共11页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51408230)
广州市科技计划项目(201610010077,201704020149)
广州市珠江科技新星项目(201806010137)。
关键词
钢管混凝土
斜柱
转换节点
轴向加载试验
参数分析
concrete filled steel tubular
inclined columns
transferring joint
axial loading test
parameter analysis
