Finite Element Study On Mechanical Properties Of Circular-arc Opening Steel Plate Shear Walls

With the increase of building height,horizontal load gradually replaces the core position of vertical load,and becomes the main control factor of structural design.Therefore,the choice of lateral force-resisting members in high-rise buildings is particularly important.Steel plate shear walls is a new type of lateral force-resisting members developed since 1970 s.Because of its high bearing capacity and good ductility,steel plate shear walls has become one of the most promising lateral force-resisting systems.According to the Technical specification for steel plate shear walls(JGJ/T380-2015),steel plate shear walls should be designed and calculated without bearing vertical loads.When the steel plate shear walls is subjected to vertical load,the effect of vertical load on its lateral bearing capacity should be considered.In order to reduce the influence of vertical load on the lateral bearing capacity of steel plate shear walls,circular-arc opening steel plate shear walls was putted forward.At present,the study of the mechanical properties of circular-arc opening steel plate shear walls has not been reported.Multiple sets of steel plate shear walls specimens were analyzed by the finite element software ABAQUS.The load applied to specimens was monotonic load.Vertical load has an adverse influence on the lateral bearing capacity of the steel plate shear walls.The effect of circular-arc opening on weakening this adverse effect was studied.Opening the circular-arc opening will reduce the lateral bearing capacity of the steel plate shear walls.The vertical load will reduce the lateral bearing capacity of the circular-arc opening steel plate shear walls.According to the above two bearing capacity reduction,determine the arc length and arc height of the optimal range of values.The steel plate shear walls specimens under cyclic loading was analyzed by the finite element software ABAQUS.The hysteretic behavior and energy dissipation capacity of the circular-arc opening steel plate shear walls were studied.The results show that the vertical load has an adverse effect on the lateral bearing capacity of the steel plate shear walls,and circular-arc opening can effectively reduce the effect.In addition,circular-arc opening can improve the energy dissipation capacity of the steel plate shear walls.The arc length of circular-arc opening is the main factor affecting the mechanical properties of steel plate shear walls.When the arc length is too small,circular-arc opening can’t effectively weaken the influence of vertical load on the lateral bearing capacity of steel plate shear walls.When the arc length is too large,the lateral bearing capacity of steel plate shear walls is severely weakened,and the energy dissipation capacity can’t be effectively improved.The optimal range of circular-arc opening size was putted forward.The arc length accounts for 1/3~1/4 of the embedded steel plate’s span,and arc-height is 100mm~150mm.The research results can provide a theoretical basis for the application of steel plate shear walls in practical engineering.