Experimental Research On Tension And Tensile-Shear Behaviors Of Shear Wall With Steel Tube-Confined Highstrength Concrete

Shear wall with steel tube-confined high-strength concrete is a new type of structure component, it is with high stiffness, high capacity and good ductility. By far, experimental study on its axial compression performance, bending performance, shereaing performance, seismic performance and tube bending performance have been conducted. Taking into account the importance and the complex stress situation of shear wall in tall buildings, this paper conducted an experimental study on its axial tension performance as well as an experimental study on its tensile-shear performance. The main research work and results are outlined as follow:(1) 7 speciments of shear wall with steel tube-confined high-strength concrete were tested under axial tensile force in order to study its tension performance. The influence of the amount and diameter of steel tube, the influence of vertical reinforcement ratio and the influence of the strength of concrete were studied during the tests. The bearing capacity, cracking, deformation and failure mode of shear wall with steel tube-confined high-strength concrete were observed and recorded during the tests.(2) Key performance of the shear wall with steel tube-confined high-strength concrete, such as the tensile failure modes, the load-displacement curve, the cracking load, the yeiding load, the stiffness, the deformation and bearing capacity were analysed. Results show that shear wall with steel tube-confined high-strength concrete is with high tensile bearing capacity and excellent tensile deformation capacity.(3) ABAQUS Nonlinear finite element analysis of the shear wall with steel tube-confined high-strength concrete was performed to study its tension behavior. Comparing the simulation results and the experimental results, it proves that the nonlinear finite element method can well reflect the tensile behavior of the shear wall with steel tube-confined high-strength concrete.(4) Calculation formulas for the initial axial tesion stiffness and tensile bearing capacity of shear wall with steel tube-confined high-strength concrete were proposed. The calculate results of these formulas are in good agreement with experimental results.(5) 9 speciments of shear wall with steel tube-confined high-strength concrete were tested under axial tensile force and horizontal shearing force in order to study its tensile-shear performance. The influence of the amount of steel tube-confined high-strength concrete, the influence of vertical reinforcement ratio, the influence of the strength of concrete, the influence of the were axial tensile force as well as the influence of the aspect ratio were studied during the tests. The bearing capacity, cracking, deformation and failure modes of shear wall with steel tube-confined high-strength concrete were observed and recorded during the tests.(6) Key performance of the shear wall with steel tube-confined high-strength concrete, such as the tensile-shear failure modes, the load-displacement curve, the cracking load, the yeiding load, the stiffness, the deformation and bearing capacity were analysed. Results show that even though they were under high level of tensile force, the shear walls with steel tubeconfined high-strength concrete could still behave high shearing capacity and well ductility.(7) Calculation formula for the tensile-shear bearing capacity of shear wall with steel tubeconfined high-strength concrete was proposed. The calculate results of the formula is in good agreement with experimental results.