Experimental And Theoretical Studies Of Thin Vertical And Lateral Stiffened Steel Plate Shear Walls

In the past few decades, steel plate shear walls have been introduced as primary lateral load resisting elements in several building around the world. Lots of work has been done in the past to investigate the post-buckling behavior of unstiffened thin steel plate shear walls(SPSW) and elastic buckling behavior of unstiffened thick SPSW in resisting lateral force due to earthquakes or wind. Thin vertical and lateral stiffened steel plate shear walls with panel slenderness ratio between 400 and 800,varying moment-resisting frames have been investigated in this study. Research contents are listed as follow: Firstly, low cyclic loading experiment of two 1:3 scale specimens of one-bay single story shear wall models with panel slendemess ratio of 400 .The test results shows that good energy dissipation and displacement ductility capacities can be achieved. Secondly, elastic buckling behavior of thin vertical and lateral stiffened steel plate shear walls with panel slendemess ratio between 200 and 800 is studied,the results shows that the buckling is relative buckling. The obtained results shows that the current technical specification for high rise steel structure (JGJ 99-98) overpredicts the elastic buckling load under certain condition.The design suggestion is therefore proposed. Thirdly, by employing the nonlinear large-displacement elastic-plastic FEM method, the shear load-carrying capacity and failure mechanism of thin vertical and lateral stiffened SPSW under simple and rigid beam-to-column connection have been found, and they are determined only by three main parameters such as panel slendemess ratio, stiffness ratio of stiffener to paneland column stiffness. The influence of initial geometric imperfection is considered. The numerical results show that the properties of SPSW are mainly determined and reflected by three parameters, that is, panel slenderness ratio , stiffness ratio of stiffener to panel, column stiffness and the correlation of them .The design formulae that provides a base for further study and application of SPSW is proposed.