Numerical analysis and experimental study of seismic performance of assembled concrete structures.

Studying the seismic performance of assembled concrete structures is an effective means to improve the quality of buildings. In this paper, the primary focus was on elucidating the research objectives. Initially, seismic performance experiments for assembled concrete structures were meticulously designed, and subsequently, concrete structural frames were assembled for comprehensive experimental analysis. A finite element model was developed for the nodes of the assembled concrete structure, incorporating the concrete principal structure model, concrete damage plasticity model, and steel principal structure model. Numerical simulations and finite element analysis were performed to verify the specific factors affecting the seismic performance of the assembled concrete structure. The results show that the hysteresis curves of the assembled concrete frame obtained from the simulation and the test curves basically match, and the difference in the maximum forward beam end displacement is only 1.76 mm, with an error rate of only 3.98%. When the axial compression ratio of the assembled concrete structural frame is within 0.3, there is no decrease in the bearing capacity when the assembled concrete is loaded to 2.3% lateral displacement. This shows that the seismic performance of assembled concrete structures can be effectively analyzed by using finite element models, and also provides a new research direction for improving the seismic quality of buildings. [ABSTRACT FROM AUTHOR]