International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 07 | July 2024
p-ISSN: 2395-0072
www.irjet.net
Seismic Vulnerability Analysis of Different Building Slabs in Varied Soil Conditions with and Without Bracing Trushalkumar Savani1, Kishan Pal2, Aakash Suthar3 1M. Tech Student, L.J. University, Ahmedabad.
2Kishan Pal, Assistant Professor, Civil Engineering Department, L.J. University, Ahmedabad, Gujarat, India. 3Aakash Suthar, Assistant Professor, Civil Engineering Department, L.J. University, Ahmedabad, Gujarat, India
---------------------------------------------------------------------***--------------------------------------------------------------------seismic losses, both in pre-earthquake disaster planning and Abstract
post-earthquake recovery programs. By quantifying the probability of failure as a function of peak ground acceleration, fragility curves facilitate the estimation of the likelihood of structures exceeding specific damage levels due to seismic hazards, effectively predicting their vulnerability.
The escalating human and economic losses caused by natural disasters in the past decades have raised concerns among researchers regarding the need to re-evaluate existing buildings to minimize casualties. In light of the vulnerability exposed by previous earthquakes, the seismic assessment of structures has become imperative, with particular emphasis on post-earthquake evaluations. This research project aims to propose an approach for evaluating the seismic vulnerability of buildings. Seismic fragility curves will be developed through nonlinear dynamic analysis, taking into account appropriate failure mechanisms. These fragility curves serve as essential tools for decision-makers in assessing seismic losses, both in pre-earthquake disaster planning and post-earthquake recovery programs. Fragility curves indicate the probability of failure as a function of peak ground acceleration. The primary objective of seismic fragility assessment is to estimate the likelihood of exceeding a specific damage level in a building due to seismic hazards, thereby predicting its vulnerability. In this study, seismic fragility analysis will be conducted on three different types of buildings, each having different slab designs and situated in diverse soil conditions.
The primary objective of this study is to conduct seismic fragility analysis on three distinct types of buildings, each characterized by different slab designs, and situated in varied soil conditions. This multifaceted investigation encompasses a wide range of structural scenarios, providing valuable insights into the interplay between building configurations, soil characteristics, and seismic vulnerability. By comprehensively examining these factors, this research contributes to a deeper understanding of the complex dynamics that govern the response of buildings to seismic events, enabling us to develop more effective strategies for mitigating the impact of earthquakes on our built environment. Over the past few decades, India has borne the brunt of several devastating earthquakes, among which stand out the 2001 Bhuj earthquake, the 2011 Sikkim earthquake, and the 2015 Nepal earthquake. These seismic events have exposed the vulnerability of many reinforced concrete (RC) structures, resulting in extensive structural damage and tragic loss of life due to collapsing buildings. Consequently, the primary source of seismic losses during these earthquakes has been building damage.
Key Words: seismic analysis, Bracing, Flat slab, Grid slab, Fragility Curve, Pushover Analysis, Soft soil, medium soil, Hard soil.
1. INTRODUCTION In recent years, the world has witnessed a surge in natural disasters, particularly earthquakes, resulting in significant human and economic losses. These catastrophic events have underscored the urgent need for re-evaluating existing structures to enhance their resilience and minimize casualties. As a response to the escalating vulnerability exposed by past earthquakes, seismic assessment of buildings has become a paramount concern. This research project delves into the critical realm of seismic vulnerability analysis, with a focus on post-earthquake evaluations, aiming to provide a comprehensive approach to assessing the seismic vulnerability of buildings. This assessment involves the development of seismic fragility curves through nonlinear dynamic analysis, incorporating relevant failure mechanisms. These fragility curves serve as indispensable tools for decision-makers, aiding in the assessment of
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The occurrence of these earthquakes has underscored the critical importance of assessing and evaluating the structural integrity of various building types in our country, more so than ever before. Figure 1 vividly depicts a building structure that succumbed to the forces of an earthquake. To avert such catastrophic collapses in the future, it is imperative to accurately determine seismic vulnerability.
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