Safety analysis of seismic reinforcement materials for port engineering based on multi-scale numerical simulation

In response to the safety issues of seismic reinforcement materials for port engineering, a multi-scale numerical simulation method is adopted, combined with indoor experiments and macroscopic structural response analysis, to explore the dynamic performance of early strength new mineral based cementitious materials through dynamic triaxial tests. The open-source finite element platform OpenSees is used to establish a numerical model and combining Monte-Carlo analysis to calculate the probability of structural conditional failure. The results show that when the curing agent dosage is 8%, the initial dynamic shear modulus exceeds 800 MPa, but the damping ratio decreases to 0.15. Under a confining pressure of 0.4 MPa, the damping ratio further decreases to 0.04. The foot of the retaining wall is the optimal reinforcement position, which can reduce the residual displacement of the surface to 0.24 m and the top pressure strain of the pile to 10.8 × 10 −3 . Monte-Carlo probability analysis demonstrates that when the peak earthquake acceleration is 0.5 g, the probability of severe structural damage at a reinforcement depth of 2 m is only 1.1%, and the failure probability reduction rate reaches 67.9%. The research provides theoretical foundation and technological backing for the seismic reinforcement design and safety evaluation of high pile wharf in port engineering.