The Research On Anti-lateral Behavior Of Full-stiffened Steel Plate Shear Wall With Slits

With the development of tall building in our country, steel plate shear wall has been used more and more widely. A series of vertical slits slotted by laser in the plane of the full-stiffened steel plate shear wall could transfer the shearing deformation to bending deformation, which greatly reinforce the ductile behavior and energy-consuming capacity of the shear wall. Stiffeners would extensively increase the out-of-plane bending-resistant stiffness, and reduce the thickness of shear wall to save steel material. The wind loads and earthquake actions play a dominant role during the process of tall building structural design, so the deficiency of the lateral-resistant capacity would affect the normal function, and even lead to the collapse of the structure. In allusion to lateral-resistant problems needed to be solved urgently in tall buildings, a new type of lateral-resistant system (full-stiffened steel plate shear wall with slits) based on the analyzing to all kinds of existent steel plane shear wall was put forward in this paper, and this new kind of shear wall contains the common merits of stiffened steel plane wall and steel plane wall with slits.In this paper, the elastic, plastic, ductile and hysteretic behaviors of full-stiffened steel plane shear wall with slits were studied, the difference between steel plate shear wall with stiffeners confined and not confined in the end were compared, the influences of the parameters such as the thickness t, width-to-thickness ratio b/t and height-to-width ratio h/b of the vertical colums between slits, the width B of steel plane shear wall and width-to-thickness ratio of stiffeners were analyzed, the calculation methods of elastic lateral stiffness and ultimate lateral loading capacity were discussed by the assistance of software ANSYS9.0, and the scopes of all kinds of analytic parameters were put forward either. The results of the research contain the following several aspects. Firstly, the full-stiffened steel plane shear wall has rather high elastic ultimate lateral-resistant capacity and excellent post-bucking capacity. Secondly, stiffeners could effectively confine the out-of-plane deformation, remarkably improve the out-of-plane bending-resistant stiffness, and energy-consuming capacity of the wall plane. Thirdly, those design parameters of full-stiffened steel plate shear wall with slits would prominently affect the lateral-resistant stiffness, loading capacity, ductile behavior and energy-consuming capacity. So the cost of steel materal could be reduced through the rational parameters design on the basis of the satistisfaction to load capacity. Because the full-stiffened steel plate shear wall with slits have very excellent post-buckling strength and steady hysteretic behavior, this passage deems that it is much too conservative to forbid the development of local flexuosity, and it would be more reasonable and economical to utilize the post-buckling strength. Wide and deep analysis to the behavior of the full-stiffened steel plane shear wall with slits were made by the use of the software ANSYS in this paper, and the conclusions of the research could be used for reference by engineers and researchers during the their work. In the end, some unsolved problems were brought forward based on the conclusions of this passage.