Study On Lateral Performance Of Corrugated Steel Plate Braced Semi-rigid Steel Frame

Semi-rigid steel frames,which can avoid the brittle failure of the welded joints,have good ductility,although the stiffness is low.Previous studies have shown that corrugated steel plate walls are a good substitute for thin steel plate shear walls.In this paper,corrugated steel plates are used as a supporting wall of the semi-rigid frame,and the wall and frame are connected by bolts to form a system.The experiment and finite element analysis method are used to study the lateral performance of the system and provide construction selection suggestions for the application.The specific work carried out is as follows.Low-cycle reciprocating loading tests of three single-span one-story full-scale specimens were performed,including a semi-rigid steel frame,a wall braced frame system without constrained rivets,and a wall braced frame system with constrained rivets.Evaluate the influence of corrugated steel plate and restrained rivets on the lateral performance of the system.34 finite element monotonic loading models were analyzed,including 3 verification test models,30 parameter analysis models of lateral performance,and 1 rigid steel frame model.The parameters include the strength and thickness of angle,the strength and thickness of corrugated steel plate,and the thickness and height of reinforcing plate.Experimental research showed that supporting walls could greatly increase the stiffness,bearing capacity and energy dissipation capacity of the system,and had a significant impact on the lateral performance of the system.The bearing capacity and energy dissipation capacity of the wall system with constrained rivets were relatively high.After yielding,the stiffness,bearing capacity and energy dissipation capacity were kept high,and the comprehensive lateral performance was better.The finite element analysis showed that the strength and thickness of the angle had little effect on the lateral performance of the system.The increase in the strength of the corrugated steel plate slightly increased the strength of the system,and the increase in thickness significantly improved the comprehensive lateral performance of the system.Analysis of four parameters all showed the wall vertical bearing failure characteristics.By improving the connection of the reinforcing plates and increasing the thickness of the reinforcing plates,the degree of vertical bearing failure could be significantly reduced,the connection parts of the wall were protected,and the properties of the wall materials were fully utilized.Semi-rigid steel frame had excellent ductility,and the use of corrugated steel sheets to brace the frame could improve the stiffness and bearing capacity of the frame,improved the lateral performance of the system,exceed the design level requirements of the rigid steel frame,and reduced the design requirements of the joints.