Steel Plate Cold-Rolled Section Steel Embedded High-Strength Concrete Low-Rise Shear Wall Seismic Performance

Min Gan,Xisheng Lu,Yu Yu,Liren Li

doi:10.1155/2018/8362319

Abstract

Four test pieces with different steel plate center-to-center distances and reinforcement ratios are subjected to low-cycle repeat quasistatic loading to optimize properties as failure mode, hysteretic curve, skeleton curve, energy dissipation parameters, strength parameters, and seismic performance of high-strength concrete low-rise shear walls. The embedded steel plates are shown to effectively restrict wall crack propagation, enhance the overall steel ratio, and improve the failure mode of the wall while reducing the degree of brittle failure. Under the same conditions, increasing the spacing between the steel plates in the steel plate concrete shear wall can effectively preserve the horizontal bearing capacity of the shear wall under an ultimate load. The embedded steel plates perform better than concealed bracing in delaying stiffness degeneration in the low-rise shear walls, thus safeguarding their long-term bearing capacity. The results presented here may provide a workable basis for shear wall design optimization.

Highlights

Shear walls are lateral-force-resistant components commonly found in framework-wall and framework-core tube structures
Most reinforced concrete shear walls crack which leads to rapid degradation of the horizontal bearing capacity, ductility, and dissipation of seismic energy. e axial force of bottom shear walls increases as building height increases. e axial compression ratio of common reinforced concrete shear walls can only be controlled by increasing the wall thickness or improving the concrete grade to enhance the ductility and energy dissipation capacity of the shear walls
Based on a comparison of the hysteretic curves of SPRCW-7 and SPRCW-8, we found that horizontal bearing capacity increased as displacement increased but remained fairly stable when SPRCW-7 reached its ultimate load. e horizontal bearing capacity of SPRCW-8 decreased to some extent with displacement when SPRCW-8 reached its peak

Summary

Introduction

Shear walls are lateral-force-resistant components commonly found in framework-wall and framework-core tube structures. The shear wall bears the majority of the horizontal force acting on the structure per its high lateral stiffness. Most reinforced concrete shear walls crack which leads to rapid degradation of the horizontal bearing capacity, ductility, and dissipation of seismic energy. Driver et al [1], for example, studied the seismic performance of composite shear walls of four-layer steel plate concrete via low-cycle repeated horizontal loading test; they found that such walls have a high ductility, excellent energy dissipation capacity, and high lateral stiffness. Arabzadeh et al [3] conducted a model test on a three-layer steel frame-plate composite shear wall at a 1 : 3 reduced scale to find that enclosed concrete slabs can effectively limit the out-of-plane buckling deformation of thin steel plates and improve the ductility and energy dissipation of the wall structure. We sought to determine the seismic performance of an oblique section of the high-strength concrete low-rise shear wall, as discussed below

Test Design

Test Devices and Loading System

Test Results

Conclusion