Study on a New Type of Multi-vertical Truss Element Model of Short-limb Shear Wall

The multi-vertical truss element model considering the influence of normal stress to shear stiffness, was achieved by the combination of axial stiffness with shear stiffness. The new multi-vertical truss shear wall member mode was established, which considered shear-lag and cumulative damage effect. Six quasi-static tests of reinforced concrete (RC) short-limb shear wall restrained by high-strength stirrups were carried out, and the mechanical response and hysteretic behavior was discussed and simulated. The buckling of longitudinal reinforcements was effectively inhibited when the RC short-limb shear wall was strengthened by the high-strength stirrups with small diameter. Meanwhile, the transverse deformation of concrete located in the web boundary side was avoided. The horizontal distribution reinforcements improved the shear capacity of RC short-limb shear wall. The energy dissipation capacity and ductility of RC short-limb shear wall was significantly enhanced by the high-strength stirrups. Finally, the HSL500-1 and HSL800-2 members were analyzed by adopting the nonlinear analysis element model of RC short-limb shear wall, and the high simulation accuracy of the proposed model was confirmed by comparing between the test date and the simulations.