《《薄壁方钢管溷凝土偏压构件的力学性能》》.pdf

第六届全国土木工程研究生学术论坛 清华大学 2008 薄壁方钢管混凝土偏压构件的力学性能 1 1,2 1 郭水平 ，王静峰 ，陈莉萍 (1. 合肥工业大学土木与水利工程学院，合肥 230009；2.江苏省土木工程与防灾减灾重点实验室，南京工业大学，南京 210009) 摘 要：本文通过有限元程序 ABAQUS 建立薄壁方钢管混凝土组合柱的有限元分析模型，合理地确定核心混凝土应力－ 应变本构关系模型、接触模型等，对4 种不同截面形式的薄壁方钢管混凝土偏压构件进行了非线性全过程受力分析。利用薄壁方 钢管混凝土偏压构件试验验证了有限元模型的正确性。在理论模型基础上，详细分析了4 种不同截面形式的薄壁方钢管混凝土偏 压构件的荷载－变形关系以及应力分布规律，讨论了薄壁方钢管混凝土偏压构件的力学性能和破坏模态。研究结果将为薄壁方钢 管混凝土组合柱设计提供参考依据。 关键词：薄壁；钢管混凝土；有限元；偏压；力学性能 Mechanical behaviour of concrete-filled thin-walled square steel tubular columns under eccentric compression 1 1,2 1 GUO Shui-ping , WANG Jing-feng , CHEN Li-ping (1. School of Civil Engineering, Hefei University of Technology, Hefei 230009, China; 2. Jiangsu Key Lab of Civil Engineering and Prevention Disaster, Nanjing 210009, China) Abstract: In this paper nonlinear finite element models are proposed to analyze the mechanical behavior of the concrete-filled thin-walled square steel tubular (thin-walled square CFST) columns by using ABAQUS software. Stress-strain relation model of the concrete core and interface model between the steel tube and the concrete core are determined. The results by finite element analyses show good agreement with those of the experiments. Moreover, Load-deformation curves and stress distribution of different cross-sectional typed thin-walled square CFST columns under eccentric compression were analyzed. The mechanical behaviour and failure mode of thin-walled square CFST were also discussed. Keywords: thin-walled, concrete-filled steel tube (CFST), finite element, eccentric compression, mechanical behavior 薄壁方钢管混凝土作为新型组合结构，可用于