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.

Thesis Overview

The project titled "Assessment of Seismic Performance of Reinforced Concrete Buildings Using Nonlinear Finite Element Analysis" aims to investigate and evaluate the seismic performance of reinforced concrete buildings through the application of nonlinear finite element analysis. In regions prone to seismic activity, the structural integrity of buildings is of utmost importance to ensure the safety of occupants and minimize damage during earthquakes. Traditional seismic design practices often rely on simplified linear analysis methods, which may not capture the complex behavior of structures under extreme loading conditions. By utilizing nonlinear finite element analysis, this research seeks to provide a more comprehensive understanding of how reinforced concrete buildings respond to seismic forces. The study will involve developing detailed finite element models of representative building structures, incorporating material nonlinearities, geometric imperfections, and boundary conditions to simulate realistic seismic loading scenarios. Through this advanced computational approach, the project aims to assess the structural response, performance, and vulnerability of reinforced concrete buildings subjected to earthquake-induced forces. The research overview will include a comprehensive literature review to establish the current state of knowledge in the field of seismic performance assessment and nonlinear finite element analysis. By critically reviewing existing research studies, design codes, and case studies, the project will identify gaps in the literature and lay the foundation for the proposed investigation. Furthermore, the research methodology will outline the specific steps involved in developing the finite element models, defining the seismic input motions, conducting nonlinear analyses, and interpreting the results. The methodology will also address the validation of the numerical models against experimental data or analytical solutions to ensure the accuracy and reliability of the findings. The discussion of findings will present the results of the nonlinear finite element analyses, highlighting the structural behavior, performance metrics, failure modes, and potential retrofit strategies for improving the seismic resilience of reinforced concrete buildings. The findings will be analyzed in the context of existing design practices and seismic assessment criteria to provide insights into enhancing the seismic performance of structures. In conclusion, the project will summarize the key findings, contributions, and implications for practice and future research in the field of seismic engineering. By combining advanced computational tools with theoretical knowledge and practical insights, this research aims to advance the understanding of seismic performance assessment and contribute to the development of more resilient and sustainable reinforced concrete buildings in earthquake-prone regions.