Performance Assessment of Steel Structures in Substations Using Nonlinear Time-History Analysis
Year: 2025
Type: article
Abstract: Electrical substations control voltage and the flow of electric energy assuring optimal transmission of electricity from generation plants to users. A detailed performance evaluation of substation’s structures is crucial to take decision regarding demolishing or repairing. To find an efficient assessment strategy, this study a 200 KV substation’s steel structure in China has been analyzed. Structural data and dimensions have been carryout through a holistic site inspection. Different laboratory tests have been conducted to evaluate the materials strength. The finite element method (FEM) has been utilized to develop the structural model, nonlinear static and time-history analysis has been done with STAAD.Pro-2023. To assess the structural safety of the steel structure, necessary factors such as time frequency, mode shape, deflections, and strength capacity ratios were studied. Structural data found from structural analysis as the structures present condition has been compared with its initial conditions and allowable limits. The findings of the study how a 15% reduction in natural frequencies and extended structural periods, indicating material degradation and potential reductions in dynamic resilience. Strength capacity ratio of the steelstructure members found lower than the initial condition.
Source: Earthquake
Authors: Md Rezars Mia, Kamal Hosen
Institution: Shanghai Jiao Tong University
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4410145975