NONLINEAR DYNAMIC ANALYSIS OF SRC FRAME STRUCTURES UNDER CYCLIC LOADING
Steel Reinforced Concrete (SRC) Composite Structure is used in modem high-rise buildings more and more because of its excellent bearing capacity, rigidity and seismic behavior, so exact numerical analysis is required in actual engineering. Based on the experimental results of a three-story, two-bay SRC frame specimen tested on a shaking table, a nonlinear dynamic finite element analysis of SRC frame structures under cyclic loading is carried out using the layered section method, where the bond-slip behavior between steel and concrete of the structural members is considered. Firstly, the reasonable stress-strain relationship of concrete is selected to simplify calculation, and in order to consider the bond-slip effects between steel and concrete, for steel surrounded by concrete, an equivalent average stress-strain relationship is obtained by modifying stress-strain relationship of bare steel. Then, the restoring force models and their feature points of concrete and steel are presented respectively that well reflect the properties of SRC frame structures,and the dynamic equilibrium equation for a multi-degree of freedom system is briefly introduced. The results of numerical analysis agree well with test results, so it is indicated that the proposed stress-strain relations of materials is capable of describing the dynamic response of SRC frame structures with satisfactory accuracy. The research supplies theoretical basis for the seismic behavior analysis of SRC high-rise buildings.
SRC frame structures Bond-slip Layered section model Cyclic loading Nonlinear analysis
Bin Wang Shan-Suo Zheng Lei Li Liang Zhang Wei Wang Lei Zeng
School of Civil Engineering, Xian University of Architecture and Technology, Xian 710055,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
724-729
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）