Under extreme dynamic loads, structures may experience plastic failure, fracture, or even complete collapse, posing significant threats to life and property safety. Simulating such phenomena involves complex behaviors including geometric nonlinearity, material nonlinearity, and fracture, presenting considerable challenges for conventional analysis methods. The Finite Particle Method (FPM), as a novel numerical approach, offers distinct advantages in dynamic, discontinuous, and nonlinear analyses, providing a new perspective for simulating structural dynamic failure. This study develops a fiber beam nonlinear model based on FPM, specifically targeting beam-column members, with a focus on its application in simulating dynamic fracture behavior in concrete structures. By deriving the internal force calculation formula for fiber beam elements and incorporating modified Kent-Park concrete constitutive laws and steel hysteresis models, a fracture analysis module is developed to efficiently simulate damage and fracture behaviors in steel and concrete members. Furthermore, the FPM-based dynamic nonlinear analysis software, FPMCAE, is developed and validated through numerical examples of typical structural components. The research outcomes establish a theoretical foundation and computational tool for analyzing complex dynamic failure in frame structures, spatial structures, and regional building clusters.