钢管混凝土组合柱节点开孔的设计与优化  

Design and Optimization of Open Hole of Steel Tube Concrete Composite Column

作　　者：陈文浩 雷劲松[1] 王明 廖昭印 CHEN Wenhao;LEI Jinsong;WANG Ming;LIAO Zhaoyin(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Nanning Branch of Chengdu Benchmark Square Construction Design Co.LTD,Nanning 530000,Guangxi,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010 [2]成都基准方中建筑设计有限公司南宁分公司,广西南宁530000

出　　处：《西南科技大学学报》2018年第3期48-54,共7页Journal of Southwest University of Science and Technology

基　　金：国家科技支撑计划项目(2015BAL03B03);西南科技大学创新基金项目(17ycx106)

摘　　要：在合理考虑钢管与混凝土之间的相互作用和选用正确的材料本构关系的基础上,采用有限元建立钢管混凝土组合柱-钢筋混凝土梁框架节点,并与现有的相关试验数据进行对比,有限元分析结果与试验结果基本吻合。针对节点处开孔大小、数量和加强措施用ABAQUS分别建立10组模型,研究其承载力大小、应力云图、钢材破坏情况等,通过比较得出最优开孔方式和加强措施。结果表明:钢管混凝土组合柱-钢筋混凝土梁节点处开孔600 mm×900 mm后承载力降低,周围应力增大,增加框架梁约束后组合柱承载力有较大程度的恢复,并且在开孔附近加上横竖加劲板后承载力及开孔附近的应力都得到有效提升。Based on the reasonable consideration of the interaction between steel tube and concrete and the selection of the correct material constitutive relationship,the finite element method is used to establish the frame-to-column joint of CFST column-reinforced concrete beam and compared with the existing relevant experimental data. The results of finite element analysis basically agree with the experimental results.Ten groups of models were set up with ABAQUS according to the size,number and strengthening measures of the openings in the joints,and the bearing capacity,stress cloud and steel failure were studied.The optimal opening method and strengthening measures were obtained through comparison. The results show that the stress around the 600 mm × 900 mm openings of CFST column-reinforced concrete beam joints decreases,and the surrounding stress increases. The bearing capacity of the composite columns increases with the increase of the frame beam,and the bearing capacity and the stress near the hole opening are improved effectively by adding vertical and horizontal stiffening board.

关 键 词：钢管混凝土组合柱 钢筋混凝土梁 节点开孔 有限元分析 

分 类 号：TU398.9[建筑科学—结构工程]