The Second Order Inelastic Analysis And Program Realization For Steel Frame-steel Reinforced Concrete Shear Wall New Type Hybrid Structure

At present, the high-rise building structures has been developed rapidly in China. Steel frame-concrete shear walls are applied to tall and super-tall building structures more and more widely in our country. But for the analysis and design of this hybrid structure, beam-to-column connection generally assumed to be fully rigid without consider the semi-rigid property. The ductility of the ordinary reinforced concrete shear wall is not ideal. In addition, it is difficult to deal with the joint construction of steel beam and the reinforced concrete shear wall in the engineering. In this research, therefore, the steel reinforced concrete shear wall was adopted and the semi-rigid property was considered. According to the object-oriented programming thought, the object-oriented steel frame-steel reinforced concrete shear wall new type hybrid structure nonlinear finite element analysis program (HSFEA) was compiled based on the advanced programming language VC++. The main research works of this paper are showed as below:Based on the method of beam-column theory, elastic geometric nonlinear stiffness matrix of beam-column elements, which considered axial force and shear deformation, was derived based on the slope-deflection equation and the stability function with shear deformation effects when analyze the steel frame of the new type hybrid structure. And then, the second-order inelastic stiffness matrix of the beam-column element was derived based on the effects of the residual stress and the initial geometrical defects.On the basis of beam-column theory, the second-order inelastic stiffness matrix of the beam-column element was derived based on the correction of the element’s slope-deflection equation with the semi-rigid connection by use the additional connecting spring in the end of the element. And then, the second-order elastic-plastic analysis of the steel frame with semi-rigid connection was deduced based on that method.Based on the finite element methods, the steel reinforced concrete shear wall finite element model was established by use the integrated model for the analysis of the steel reinforced concrete shear wall. The second-order inelastic stiffness matrix was deduced by use the8nodes isoparameter element which has high precision and with the consideration of both geometric and material nonlinear property.According to the object-oriented programming thought, the whole structure was divided by use the VC++as follows:node, element, material, load, loadgroup and overall structure. Some classes were derived from the unit and material. According to the second-order inelastic theory of the new type hybrid structure, the second-order inelastic analysis program of the semi-rigid steel frame-steel reinforced concrete shear wall hybrid structure (HSFEA), which can be used in the analysis of ultimate bearing capacity with the consideration of geometric nonlinear, material nonlinear and the beam-column semi-rigid connections, was compiled. Through each chapter examples in this paper show that the compilation and the algorithm of the program are reliable and correct, the precision is able to fulfill the analytical requirements.