DYNAMIC BEHAVIOR OF PORTAL FRAME STRUCTURES WITH TAPERED MEMBERS
Using ANSYS program and considering the materials nonlinearity, the dynamic numerical simulation models of tapered portal steel frames are set up. The shape and amplitude of hysteretic curve obtained by numerical simulation analysis of the models coincide well with the test results.Dynamic modes analysis of 11 tapered portal steel frames with different spans show that the natural vibration frequencies of these structures decrease with span increasing and span 42m is a borderline of dynamic characteristics of the frames. The natural vibration frequencies of these frames vary slightly with spans longer than 42m. The numerical results and simulation analysis of hysteretie curves with different slenderness ratios and spans indicate that these structures have good plastic deformation and hysteretic energy-dissipated capacity, but the structural stiffness and material strength degenerate quickly and the structural ductility decreases rapidly with spans bigger than 42m and slenderness ratio greater than 90.
Portal frame Tapered member Dynamic behavior Numerical simulation analysis Hysteretic curve Ductility
Xuan-Neng Gao Chuan-Qi Wang Kun Li
College of Civil Engineering, Huaqiao University, Quanzhou 362021, P.R.China
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
1213-1218
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）