DEVELOPMENT OF MACRO-MODEL SEISMIC COLLAPSE SIMULATOR FOR FRAMED STRUCTURES USING ASI-GAUSS TECHNIQUE
The main objective of this study is to develop a macro-model finite element code, which can simulate dynamic behaviors with strong nonlinearities and discontinuities and is efficiently applicable to seismic collapse analyses of framed structures. The applied technique is called the ASI-Gauss technique for the linear Timoshenko beam element, which computes highly accurate elasto-plastic solutions even with the minimum number of elements per member. It gains high accuracy especially in elastic range, by placing the numerical integration points of the two consecutive elements forming an elastically deformed member in such a way that stresses and strains are evaluated at the Gaussian integration points of the two-element member. Moreover, the technique can be used to express member fracture, by shifting the numerical integration point to an appropriate position and by releasing the resultant forces in the element simultaneously. The numerical code can be used to analyze dynamic behaviors of framed structures, initiating from elastic range to a total collapse. Simple numerical tests are conducted in this paper to verify the proposed code. Moreover, a three-dimensional seismic collapse analysis considering member fracture and contact is performed on a large-scale framed structure, and practical results are obtained in a reasonable short calculation time.
Seismic collapse simulator Framed structures ASI-Gauss technique Linear Timoshenko beam element Non-linear FEM
N. Katahira D. Isobe T. Ine K. Kajiwara
University of Tsukuba, Japan Dept. of Engineering Mechanics and Energy, University of Tsukuba, Japan Invited Research Fellow, National Research Institute for Earth Science and Disaster Prevention, Japa Senior Researcher, National Research Institute for Earth Science and Disaster Prevention, Japan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12(万方平台首次上网日期,不代表论文的发表时间)