Experimental Studies And Theoretical Analysis Of Steel High Performance Concrete Shear Wall

Shear wall is an important component to bear vertical load and lateral forceresisting, high-rise building development has also put forward higher requirements on theperformance of shear wall. High strength concrete has many advantages of highstrength, good durability, good fluidity,that can reduce the weight of structure, reduce theseismic response, but also decrease the wall, column vertical component sectionsize and increase the use of the construction area, has a good economy. The main contentscovered are presented as follows：(1) The seismic performance of steel tube high performance concrete shear wall isstudied, and1high performance concrete shear wall and2steel tube high performanceconcrete shear wall specimens were tested under low cyclic horizontal loading. Finally, thispaper study the failure mechanism, hysteretic behavior, deformability and the energydissipation capacity of steel tube high performance concrete shear wall subjected to horizontalcyclic loading. The basis for the analysis of bending loads and ductility of steel tubehigh performance concrete shear wall are provided.(2) The plastic analysis of steel tube high performance concrete shear wall is analyzed.The nonlinear finite element model of steel tube high performance concrete shear walls areconstructed with the finite element software ABAQUS; Considering thematerial nonlinear, stress loading complete process and concrete cracking is simulated; Thispaper analyze the main factors affecting deformation ability of concrete filled steeltubular shear walls, including axial compression ratio, steel ratio, shear span ratio, thicknessof steel tube and confinement index.(3) This paper strain provide the strain distribution and sectional bearing capacity limitstate of steel tube high performance concrete shear wall yielding and stressing; The planesection assumption and consider the constraints affect the steel based on analysis of the shearwall, the ultimate bearing capacity; puts forward the calculation formula of flexural bearingcapacity of steel tube concrete shear walls. Compared with the experimental data, thecalculation results of the proposed formula and experimental results are consistent. (4) The yielding curvature and the ultimate curvature of the steel tubehigh performance concrete shear wall are calculated by equilibrium and deformationcondition. Then, the displacement ductility ratio of the steel tube high performanceconcrete shear walls was established by the relationships between curvature ductility ratioand displacement ductility ratio. It is obtained for the relationships among the displacementductility ratio, the axial load ratio, the characteristic value of stirrup content and the aspectratio. It is concluded that the axial load ratio is an important factor for deformation capacityand increasing the characteristic value of stirrup content and limiting the axial load ratio areeffective means to improve ductility. The displacement-based deformation capacity designwas then developed for the steel tube high performance concrete shear walls and theconclusion can be referred by the evaluation of deformation capacity for the steel tubehigh performance concrete shear wall.(5) Based on the deformation capacity of steel tube high performanceconcrete shear walls, its drift at yield and at ultimate were obtained. Theperformance-based seismic design method was then developed for the steel tubehigh performance concrete shear walls and the transverse reinforcement characteristicvalue accordance with the target top displacement ratio and axial load ratio is proposed.