Seismic Analysis and OpenSees Scripting for Pile-Supported Cable Bridges with Liquefaction Effects

This project involves advanced numerical modeling and seismic analysis of pile-supported cable-stayed bridges considering soil liquefaction effects using **OpenSees**. The study encompasses the nonlinear dynamic response of bridge structures subjected to strong ground motions, incorporating **soil-structure interaction (SSI)** and **liquefaction-induced lateral spreading**.

Key aspects include the development of **high-fidelity finite element models**, calibration of **constitutive soil models**, and implementation of **multi-support excitation techniques** for earthquake loading. The **beam-column elements, fiber-based modeling, and p-y springs** are used to simulate the complex behavior of piles embedded in liquefiable soils.

Custom **OpenSees Tcl scripting** is utilized to automate parametric studies, optimize computational efficiency, and validate results through **incremental dynamic analysis (IDA)**. The impact of **abutment flexibility, bridge deck displacement, and post-liquefaction stiffness degradation** is thoroughly investigated.

Results provide insights into the **seismic vulnerability of cable-supported bridges**, mitigation strategies, and performance-based seismic design recommendations for resilient infrastructure in liquefaction-prone regions.