Study On The Mechanical Performance Of Buckling-restrained Steel Plate Wall-partially Hinged Steel Frame Structure Syste

In the steel frame structure,rigid joints have complex structure,difficult construction and large amount of steel.So the joints are set to hinged joints,and then the buckling restrained steel plate shear wall is used to compensate for the loss of bearing capacity and stiffness.However,if all the joints are hinged,the frame part has no lateral resistance and does not have the role of the second line of seismic fortification after lateral force resistant member yields.Therefore,buckling restrained steel plate shear wall-partially articulated steel frame structure is proposed in this paper.Some beam-column joints are set to articulated joints,and the two-side connected BRW are added to the structure.This can not only reduce the difficulty of construction,reduce the amount of steel,but also make the frame part still has a certain anti-lateral ability after the BRW yield,the frame can still serve as the second line of anti-seismic fortification to avoid the collapse of the structure.The two-side connected BRW has the characteristics of flexible layout,which can facilitate the opening of doors and Windows,corridors.By adjusting the width of BRW,the stiffness and bearing capacity of the shear wall can be changed to meet the design requirements caused by the articulation of some joints..In order to systematically study the mechanical properties of buckling restrained steel plate shear wall-partially articulated steel frame structure system,the following works are mainly carried out in this paper:1.In order to study the efficient layout of two-side connected BRW,the finite element software ABAQUS was used to establish BRW layout models with different single-span and multi-span arrangements.Through the comparison of the overall mechanical performance of the structure,the most efficient layout scheme of BRW is found For single-span layout scheme,staggered layout of one BRW in different stories,alternate layout of one BRW and two BRWs in different stories,and staggered layout of two BRWs in different stories have obvious advantages.For multi-span layout scheme,staggered layout of one BRW in the side span,herringbone layout of BRWs and X-shaped layout of BRWs can be used as the preferred scheme.2.Influence of placement and number of articulated joints on mechanical properties of plane steel frame structures.According to nine kinds of plane steel frame structure models with different positions and quantities of articulated joints,a more reasonable arrangement scheme of articulated joints is sought by comparing the overall mechanical performance of the structure.The results show that it is not suitable to set articulated nodes on the span of BRW,and the stiffness loss of the middle column is greater when the articulated nodes are set on the middle span,so the articulated nodes should be arranged on the side span or several end spans.Based on the same design of lateral bearing capacity,the initial stiffness of the BRW-partially articulated steel frame structure is significantly higher than that of the steel frame structure.3.Based on efficient layout of BRW and efficient layout of beam and column articulation nodes,a 10-story BRW-partially articulated space steel frame model was established to study the seismic performance of BRW-partially articulated space steel frame structure under actual ground motion,and compared with the seismic performance of pure steel frame structure under the same condition.The results show that,based on the same design of lateral bearing capacity,the inter-story displacements of the BRW-partially articulated space steel frame structure are significantly reduced than those of the pure steel frame structure,and the inter-story displacements are more evenly distributed along the floors.Under the rare earthquake,the BRWpartially articulated space steel frame is much less than the plastic hinge in the steel frame,which greatly reduces the damage degree of the structure.So the BRW-partially articulated space steel frame structure has better seismic performance and more obvious shock absorption effect.