Performance-Based Seismic Analysis Of Bridge Piers: A Study In Concrete Technology

Seismic analysis is the process of evaluating the response of structures to seismic activity, ensuring their safety and functionality during and after earthquakes. This study addresses the limitations of traditional seismic analysis methods and emphasizes the necessity for performance-based approaches to better capture realistic seismic scenarios. The objectives of this research are to conduct a performance-based seismic analysis of bridge piers utilizing modern concrete technologies, such as high-performance and fibre-reinforced concrete, and to develop guidelines for their implementation in seismic regions. The study employs quasi-static cyclic loading and dynamic shake table tests to evaluate the seismic performance of bridge piers constructed with high-strength concrete, steel reinforcement, and Shape Memory Alloy (SMA). The proposed model integrates SMA with traditional materials to enhance energy dissipation and minimize residual deformations. The experimental methodology includes specimen preparation, seismic testing, instrumentation, data analysis, and finite element modeling. Results indicate that SMA-reinforced piers exhibit improved performance, with SMA stress reaching 442.5 MPa at a 0.005 strain and steel yielding stress at 525 MPa. The proposed model demonstrates significant enhancements in seismic performance, providing a robust framework for performance-based seismic analysis of bridge piers and highlighting the critical role of advanced materials in achieving resilient infrastructure.