Seismic behavior of the assembled walls using uniform precast hollow-core concrete panels restrained by cast-in-place boundary elements in single-story buildings

Abstract

To achieve efficient construction of single-story buildings and increase economic efficiency while ensuring safety, low-cost, easy-to-assemble, and good seismic performance assembled walls using uniform precast hollow-core concrete panels restrained by cast-in-place boundary elements were designed. Through the low-cyclic loading test of three specimens, the safety and reliability of the connection between the components were verified, the good seismic performance of the structure was proved, and the influence of the number (2, 3, 4) of panels contained in the specimens, that is the shear span ratio (SSR) of the specimens, on their seismic performance was investigated. The study found that all specimens finally show shear-slip damage, and with the decrease of SSR, the ultimate shear-bearing capacity of the specimen increases, the deformation capacity decreases, and the energy dissipation capacity increases. Compared with the specimen of 2 panels, the ultimate shear bearing capacity of 3 panels and 4 panels is increased by 39.2% and 88.9% respectively. The ultimate deformation capacity of 2 panels is similar to that of 3 panels, but that of 4 panels is reduced by 23.3%. In addition, these three specimens are simulated using the finite element analysis software ABAQUS. The stress nephogram of each specimen reflects the presence of vertical shear along the thin wall of the circular hole of the panels under horizontal load, and the vertical shear surface will be linked into the shear belt along the diagonal of the specimen. Combined with experiment and finite element simulation, the calculation method of the ultimate lateral bearing capacity of the structure is established. The ratio of the measured value to the calculated value is greater than 1.0, and the maximum relative error of them is only 6.85%, which proves that the calculation method is safe and reliable. The research results of this paper can provide the necessary basis for the engineering application in single-story buildings.