ABSTRACT
In order to study the bearing capacity of reinforced sleeve grouting-connected concrete shear walls after the fire, the finite element software ABAQUS is used to establish a numerical analysis model for the seismic performance of reinforced concrete shear walls connected by grouting reinforced concrete shear walls at room temperature and the seismic performance of reinforced concrete shear walls after the fire. The skeleton curve obtained from the simulation is in good agreement with the experimental skeleton curve. The rationality of the finite element model is verified. On this basis, the numerical simulation of reinforced sleeve grouting connected concrete shear wall after the fire is carried out, and the effects of fire time, axial compression ratio, and longitudinal stressed reinforcement diameter on the bearing capacity of sleeve grouting connected shear wall are analyzed. The results show that the fire does great harm to the bearing capacity of the reinforced sleeve grouting connected concrete shear wall. After 60 min and 120 min of fire, the peak load of the precast shear wall decreases by 10.94% and 40.59% respectively compared with that at room temperature; compared with the specimens with an axial compression ratio of 0.06, the peak loads of the specimens with an axial compression ratio of 0.12, 0.18 and 0.24 increased by 10.79%, 19.63%, and 27.24% respectively; compared with the specimens with the diameter of 14 mm, the peak loads of 16 mm, 18 mm and 20 mm specimens increased by 3.19%, 7.73%, and 12.17% respectively.
