Experimental study on fiber-reinforced ceramsite concrete composite wall panel and correction of seismic damage model

In order to study the damage model of the new fiber-reinforced ceramsite concrete composite wall panels under seismic action, two groups of six wall panels are subjected to seismic tests. The failure mechanism, hysteresis and skeleton, load-bearing capacity, energy dissipation, stiffness, and other seismic indicators are analyzed. The test results show that the displacement angle of the new composite wall panels is greater than the limit of ordinary shear walls. The ratio of ultimate displacement angle to yield displacement angle is approximately 3, indicating a high ductility and strong deformation capacity of the wall panels. The comprehensive indicators show that both types of wall panels exhibit excellent seismic performance. By utilizing analytical tools to simulate and analyze two types of wall panels, the calculated results demonstrate a small error compared to experimental results, confirming the accuracy of the computational model. Building upon experimental results and previous research findings, this study proposes a seismic damage model suitable for new composite wall panels and further defines the damage indicator range of the model. Through example applications and comparative analysis of effects, the correctness and universality of this damage model are proven. The seismic damage model presented in this study not only improves upon the Park-Ang damage model but also enriches the types of damage assessment for wall panel components.