（北京工业大学工程抗震与结构诊治北京市重点实验室，北京 100124）

[摘要]  为了研究方钢管混凝土柱-钢梁内隔板节点的力学性能，针对二组不同尺寸的方钢管混凝土柱-钢梁内隔板连接节点进行了低周反复加载试验，并采用有限元软件OpenSees中由纤维截面建立的梁柱单元对试验试件进行数值模拟。研究结果表明，采用合理的材料本构模型进行模拟分析，计算得到的荷载-位移曲线与试验结果吻合较好；这类节点表现出较好的承载力和滞回性能，具有较好的变形能力，可以实现工程的需要。

[关键字]  钢管混凝土；节点；试验；有限元分析

中图分类号：TU392.3           文献标示码：A            文章编号：

作者简介：苏丹，硕士研究生，Email：sudan2012@emails.bjut.edu.cn。

Experimental study and finite element analysis on square concrete filled steel tube column-steel beam joints

strengthened by inner diaphragms

Su Dan, Li Hongquan, Yan Weiming, Mao Shiyang

(Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit，Beijing University of Technology，Beijing 100124，China)

Abstract: To study the mechanical behavior of square concrete filled steel tube (SCFST) column- steel beam joints strengthened by inner diaphragms .numerical simulation of 2 different joints under low cyclic and reciprocal load are carried out by the use of nonlinear-beam-column element based on fiber model in finite software OpenSees in this paper. The comparison of simulated results and experimental results indicates that the load-displacement curves by finite element analysis show good agreement with those of the experiments, the joints showed good capacity and hysteretic behavior, with better deformation capacity needs of the project can be realized.

Keywords: concrete-filled rectangular steel tubular; joint ; experiment ; finite element analysis

参考文献

[1] CECS 159—2004 矩形钢管混凝土结构技术规程[S]北京:中国计划出版社,2004.

[2] JCJ 101—96 建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.

[3] 周天华, 聂少锋, 卢林枫，等.带内隔板的方钢管混凝土柱-钢梁节点设计研究[J]. 建筑结构学报,2005, 26(5) : 23-29 .

[4] SILVIA MAZZONI, FRANK MCKENNA, MICHAEL H, et al. OpenSees users manual［M］. PEER,University of California，Berkeley,2004.

[5] MANDER J B , PRIESTLY M J N , PARK R. Theoretical Stress-Strain Model for Confined Concrete[J]. Journal of Structural Engineering, ASCE, 1988, 114(8):1804-1825.

[6] 宁超列,段忠东.OpenSees中三种非线性梁柱单元的研究[J].低温建筑技术,2009,(3): 49-52.

[7] 张素梅,张大旭.钢管混凝土柱与钢梁节点荷载-位移滞回曲线理论分析[J].哈尔滨建筑大学学报,2001,34(4) :1-6.

[8] 聂建国,秦凯,肖岩.方钢管混凝土柱节点的试验研究及非线性有限元分析[J].工程力学,2006,23 (11) :99-109,115.