2024 Volume 10 Issue 52 Pages 1946-1951
Coastal ports are important transportation hubs connecting sea and land, not only important nodes of international trade and logistics, but also an important part of national economic development and national defense security. China's coastal ports are usually located near the earthquake zone. Therefore, it is necessary to investigate their ground motion characteristics to ensure the safety and reliability of the coastal ports. In seismic response problems, the presence of transverse isotropic soil results in different stiffness and damping characteristics in different directions, directly affecting the dynamic response characteristics of the soil. In this study, a finite element numerical analysis with equivalent nonlinear soil model is established to study the effect. As an example, the soil dynamic parameters in Yangshan Port were calibrated by a series of bending element, resonance column and dynamic triaxial tests. The influences of transverse isotropy on the PGA and response spectrum are studied. The seismic characteristics under different seismic intensities were analyzed, and a standard design response spectrum considering anisotropic soil layers was provided. The results can be used to improve the seismic design of coastal ports and provide a scientific basis for the seismic safety evaluation of existing ports.
