Abstract
To study the seismic performance of the box-plate steel structure system, two three-storey single box-plate steel structure space stress-bearing unit test pieces have been designed and fabricated according to the 1 : 3 reduced scale. In addition, the quasi-static loading test has been performed on the test pieces where the destruction process, destroy mode, bearing capacity, hysteretic behavior, etc., have been studied and the impact of reinforcing measures with a corner or not on the seismic performance of test pieces has been mainly analyzed. The test results show that the destruction of the box-plate steel structure modular unit under the low cyclic loading effect starts with corner buckling and ends with corner wallboard tear. The test piece has excellent bearing capacity and energy dissipation; the corner reinforcing structure measure also has enhanced the seismic performance of the modular unit. Based on the test, we have taken finite element numerical simulation to the test pieces, compared the analysis result of the test with the finite element, and verified the effectiveness of the finite element analysis method. This paper designs four groups of 64 finite element model test pieces and discusses the influence law of the height-thickness ratio of the wallboard, flexibility coefficient of corner reinforcing structure rib, and axial compression ratio to the seismic performance of the modular unit. The results show that the bearing capacity of the test piece is decreased with the increase of axial compression ratio under the premise that the wallboard height-thickness ratio and flexibility coefficient of the corner reinforcing structure rib are certain. Based on the above analysis results, we have put forward the lateral force resistance calculation model of the reinforcing structure modular unit with or without corner.
Highlights
As a new type lateral force resistance structure system, has large lateral resistance stiffness and good seismic performance, which has been widely applied in the high-rise structure system [1,2,3,4]. e typical steel plate shear wall is composed of an embedded steel plate and surrounding steel frame. e embedded steel plate and frame are connected by a splice bar as transition and connected through welding or high-strength bolt. e steel plate only bears the horizontal load, and the steel frame assumes the vertical load is borne by a steel frame [5,6,7,8]
[9] studied the seismic performance of stiffener-free thin-walled steel plate shear wall, and the result showed that the inelastic behavior of the thin plate test piece is mainly controlled by the thin plate yield strength, and the nonlinear characteristic is mainly related with the plate’s tensile strength and diagonal tension field
Driver et al [10, 11] studied the bearing capacity of the four-storey single steel plate shear wall test piece under strong earthquake, and the result indicated that the shear wall showed excellent ductility and energy dissipation characteristic
Summary
As a new type lateral force resistance structure system, has large lateral resistance stiffness and good seismic performance, which has been widely applied in the high-rise structure system [1,2,3,4]. e typical steel plate shear wall is composed of an embedded steel plate and surrounding steel frame. e embedded steel plate and frame are connected by a splice bar as transition and connected through welding or high-strength bolt. e steel plate only bears the horizontal load, and the steel frame assumes the vertical load is borne by a steel frame [5,6,7,8]. Driver et al [10, 11] studied the bearing capacity of the four-storey single steel plate shear wall test piece under strong earthquake, and the result indicated that the shear wall showed excellent ductility and energy dissipation characteristic. E box-plate steel structure system is composed of a modular unit enclosed by the stiffened wall and the stiffened floor, which bears both the vertical and horizontal loads of the building, where the stiffened wall and the stiffened floor are all composed of steel plate, T-stiffener, and L-stiffener. Under the background of vigorously developing building industrialization, the box-plate steel structure system, with the characteristics of easy for factory prefabrication, convenient for transportation, efficient in construction, high in quality, green, and environmentally friendly, is of great value. Based on the analysis results, the lateral resistance calculation model of the box-plate steel structure modular unit has been put forward, which has provided basis for the establishment of the lateral resistance calculation method
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