Seismic Tests and Finite Element Analysis of Joints for L-Shaped Ceramsite Concrete Composite Shear Walls

In order to solve the thorny problems of traditional exterior wall insulation, such as flammability and easy detachment, a type of joints for L-shaped ceramic concrete composite shear walls has been proposed, which can meet the requirement of integrated wall insulation and load-bearing. The hysteresis and skeleton curves, bearing capacity, ductility, energy dissipation and residual displacement were analyzed emphatically through the experiment and finite element study of three specimens. The results showed that the wall joints belonged to the category of bending shear failure. The damage of the web foot was serious and the damage of the core area was light, which met the design requirement of "strong joint and weak member". The ductility coefficient was 1.66 times of that of ordinary concrete composite shear wall, and the deformation capacity was good. The viscous damping coefficient and work ratio coefficient were 4.53 times and 1.87 times higher than those of similar wall panels, respectively, which had significant energy consumption advantages and were beneficial for the overall seismic resistance of the specimens. The comparative analysis between the calculation and experimental results showed a good agreement. Through simulation and expansion analysis, the influence of axial compression ratio and insulation board thickness on the working performance of shear wall joints was found. It was suggested that further research should appropriately improve the material strength, reinforcement, and structural form of the edges and foots of the shear wall joint’s web plate, so as to enhance or improve its working performance.