Study On Performance Based Seismic Design For Steel Frame-steel Plate Shear Wall Structure

Steel plate shear wall structure is an effective lateral support system in recent years, the current research on the system mostly focused on the component level, but few studies analyzed the design methods, it is largely hindered the application of steel plate shear wall. In addition, with the development of the seismic design theory and buildings reliability requirements, the performance-based seismic design method is proposed. Therefore, the study of steel plate shear wall structure design method based on performance is the key to the effective promotion and use of the lateral force resisting system.According to the thin steel plate shear wall structure, the performance-based seismic design method of steel plate shear wall structure is systematic improved for the performance goal setting, quantifying and how to achieve in this paper. the main research contents are as follows:Based on the steel plate shear wall structure deformation characteristics, the performance based indicators are proposed, combined with the research results of this paper and experimental data in domestic and foreign, and the seismic design criterion based on performance has been established. The reasonableness of the proposed indicators is verified though pushover analysis of three different height of beam-shell model and strip model of the steel plate shear wall structure.By researching of seismic design methods in China and its problems, moderate earthquake is the core objective clearly. Through the Pushover analysis and the IDA of six examples of different height and span, the seismic force modification factor has gotten under different performance indicators. The performance-based seismic design method for fortification intensity quake is proposed using the seismic force modification factor. In addition, the steel plate shear wall structure has the high super coefficient RΩ by analyzing, super is the main part of the seismic modification factor.Though pseudo-static experiments of 3 frame-steel plate shear wall, the seismic behavior has been analysed includes the stress mechanism, the deformation and damage mode, ductility, the energy dissipation capacity etc, and the corresponding research results obtained by the finite element analysis. Based on the the previous research results, two steel plate shear walls with multi-ribbed grid have been designed, then using the experiment and finite element analysis, the before research results have been proved, and the analysis can provide a foundation for the further research and application.Through using dynamic time history analysis for three different height framework-steel plate shear wall structure, the design essential factors has gotten such as failure modes of the quake,displacement indicators, the distribution of the shear. Then discussing instability category of the steel plate shear wall braced frame, the stiffness and strength requirements of the outer frame is difference between the flexure instability and flexure-shear instability of the steel plate shear wall structure. Using the proportion of flexure capacity and shear capacity of the stiffness representatives layer of the braced frame, the discrimination method of the braced frame has given, combined with the numerical results, the shear distribution requirements of the outer frame and the braced frame is given for the flexural and flexure-shear structure.Finally, the study has been focused on the related problems of steel plate shear wall structure design. It is proposed that side column of the steel plate shear wall must satisfy the requirements of wall material super, in order to give full play to material properties of the plate and to provide a reliable anchor role of the plate, meanwhile, some suggestions is put forward for design of beam and plate. Comparison of the advantages and disadvantages of the existing simplified models, TSM model can be used for elastic design, while SM model can be used for elastoplastic analysis. And two examples are given for illustrating the performance-based seismic design method of the steel plate shear wall.