Experimental Research On Seismic Performance Of Steel Plate Energy Dissipating Wall With Force Control And Anti-Buckling Bracing

The lateral force resistant structure plays a role in the building structure to resist horizontal loads such as wind and earthquake loads,and is the key to ensure the safety and reliability of the whole structure.At present,the two main types of lateral force resisting structures used in multi-story steel structures are steel plate shear walls and steel frame support structures.In view of the drawbacks of these two existing lateral forces resisting structural systems in practical engineering applications and their own structural defects,this paper proposes a new lateral force resisting structure of steel plate energy dissipating wall force control anti-buckling support and conducts experimental research and numerical simulation.The test specimens and test plan were designed according to the test purpose and specification requirements,and then a static cyclic reciprocal loading test was carried out on a steel plate energy-consuming wall force-controlled anti-buckling brace specimen and an empty frame comparison specimen to observe the test phenomena and to study and analyze the hysteresis performance,bearing capacity,energy dissipation capacity,yielding and damage mechanism,brace axial force and beam-column node turning point of the specimens.Then,ABAQUS finite element software is used to refine the numerical simulation analysis of the test specimen and compare and analyze the test load carrying capacity,lateral stiffness and energy dissipation capacity.Finally,this paper uses the test specimen model as the simulation prototype,and adopts the method of controlling a single variable to establish the finite element model with different parameters,and comparatively analyzes the hysteretic skeleton curve,stiffness degradation and energy dissipation capacity under different area ratio and flexibility coefficient.The results of the study show that the seismic performance indexes of the structure were studied and analyzed through the proposed static test on the specimens of the force-controlled anti-buckling support structure of the steel plate energy-consuming wall,which shows that it has good ductility and energy-consuming capacity and high bearing capacity and stiffness at the same time,and has obvious yielding and damage mechanisms,and is a kind of lateral force-resisting structure with good seismic performance;the numerical simulation of the test specimens was carried out using finite element software,and the finite element analysis of the structure and the test results basically matched.The span ratio and flexibility coefficient were selected for parametric analysis,and it was found that the span ratio has a great influence on the seismic performance of the force-controlled anti-buckling support structure of the steel plate energy-consuming wall.Under the same span ratio,the flexibility coefficient does not have a great influence on the ductility and energy dissipation capacity of the structure,but only has different effects on the bearing capacity and stiffness of the structure.