Assessment of Seismic Performance of Reinforced Concrete Buildings Using Nonlinear Finite Element Analysis

Thesis Abstract

Abstract
The seismic performance evaluation of reinforced concrete buildings is essential to ensure the safety and reliability of structures subjected to seismic forces. This study focuses on the assessment of seismic performance using nonlinear finite element analysis, which provides a detailed understanding of the structural behavior under earthquake loading conditions. The research investigates the response of reinforced concrete buildings to seismic forces, considering nonlinear material behavior and geometric nonlinearity. Various analysis techniques are employed to simulate the seismic response accurately, including pushover analysis, time history analysis, and performance-based assessment methods. Chapter 1 introduces the research topic, presents the background of the study, defines the problem statement, outlines the objectives, discusses the limitations and scope of the study, highlights the significance of the research, and provides an overview of the thesis structure. The definitions of key terms used throughout the thesis are also presented to enhance understanding. Chapter 2 comprises a comprehensive literature review that explores existing research on seismic performance evaluation of reinforced concrete buildings using nonlinear finite element analysis. The review covers various aspects such as seismic design principles, material modeling, numerical analysis methods, and performance assessment criteria. The literature review helps establish the theoretical foundation for the research and identifies gaps in current knowledge that need further investigation. Chapter 3 details the research methodology adopted in this study. The methodology includes the selection of building models, development of finite element models, calibration of material properties, generation of seismic input motions, implementation of analysis procedures, and evaluation of performance criteria. Various aspects of the research methodology, such as model validation, sensitivity analysis, and uncertainty quantification, are discussed to ensure the reliability and accuracy of the results. Chapter 4 presents a detailed discussion of the findings obtained from the nonlinear finite element analysis of reinforced concrete buildings under seismic loading. The chapter discusses the structural response characteristics, including displacement patterns, inter-story drifts, and member ductility demands. The seismic performance of the buildings is assessed based on damage states, capacity curves, and fragility analysis. The implications of the findings on the seismic design and retrofitting of reinforced concrete structures are also discussed. Chapter 5 concludes the thesis by summarizing the key findings, discussing the implications for practice, and providing recommendations for future research. The study contributes to the understanding of seismic performance assessment using nonlinear finite element analysis and highlights the importance of considering nonlinear effects in structural analysis and design. Overall, this research enhances the knowledge of seismic behavior in reinforced concrete buildings and provides valuable insights for improving the seismic resilience of structures in earthquake-prone regions.