Nonlinear analysis of second-order effect of reinforced concrete compressed members
Second-order effect is referred to the additional internal force of the structural members and bars that have inter-bedded displacement and deflection. In the design of frame structure, frame-shear-wall structure, frame-core-wall structure, shear-wall structure and so on, second-order effect should be considered. The nonlinear analysis of RC frame is to describe the constitutive relationship of material precisely, to make full use of plastic behavior and internal force redistribution of structural and then make structural design more economic and more accurate as well. The element stiffness matrixes of concrete frame and truss structures are derived in this paper which is based on the principle of nonlinear finite element Utilizing the method that stress-strain relations of element are formed directly from physical properties of material, the influence of material nonlinearity and geometric nonlinearity are taken into account in the element stiffness matrix. Besides, one seven-story RC Frames has been analyzed by the matrix and corresponding program. After having studied different results caused by the calculation, SAP2000 and the experiment of frame, the authors give suggestions for how to use the code reasonably. The results calculated by using the approach in this paper are found to be in good agreement with the experimental results. So the program provides an efficient means of theoretical analysis in studying nonlinear design method for reinforced concrete frames.
Jie-jiang Zhu Qiong Zheng
Research Institute of Structural Engineering and Disaster Reduction, Tongji University,Shanghai 2000 Research Institute of Structural Engineering and Disaster Reduction, Tongji University,Shanghai 2000
国际会议
The 5th International Conference on Nonlinear Mechanics(第五届国际非线性力学会议)
上海
英文
578-583
2007-06-11（万方平台首次上网日期，不代表论文的发表时间）