Abstract:Engineered cementitious composites (ECC) are cement-based composite materials that exhibit strain hardening under tension and the development of numerous fine cracks, making them ideal for energy dissipation. In this paper, ECC was utilized in the plastic hinge areas of precast walls panels, forming a new type of prefabricated ECC energy-dissipating wall panel, which was then used in prefabricated shear wall-frame structures. Using the OpenSees simulation platform, a precast ECC energy-dissipating wall panel model was built with the multiple vertical line element for parameter analysis. Static elastoplastic and dynamic time-history analysis was conducted on a 12-story precast ECC energy-dissipating wall-frame structure to investigate the influence of the ECC energy-dissipating wall panels on the seismic performance of the frame-shear wall structures. The results showed that the ultimate bearing capacity and energy dissipation capacity of the precast ECC energy-dissipating wall panel were improved by 35% and 31%, respectively, compared to ordinary precast shear walls. Static elastoplastic analysis and fragility analysis results further verified the role of ECC materials in improving the seismic performance of frame-shear wall structures. The seismic performance improvement under near-field pulse-type seismic waves was most significant, indicating that ECC was suitable for seismic applications in near-fault structures. The cost of the precast ECC energy-dissipating wall-frame structure was only 2.1% higher than that of the RC shear wall-frame structure, making the use of ECC energy-dissipating walls an effective and economical solution for improving structural seismic performance.