Seismic vulnerability assessment of masonry buildings in Karachi

Mohammad, Aslam Faqeer; Khan, Rashid Ali; Fatima, Engr. Bushra; Shaukat, Engr. Aaqib; Mujtaba, Engr. Muhammad

doi:10.1007/s42107-022-00493-1

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…The vulnerability index (VI) is a direct indicator that is easy to understand by the various users (engineers, decision-makers, managers, etc.). It is an intermediate method used instead of complexe methods like nonlinear dynamic analyses and so on, which are useful in seismic vulnerability studies (Halder et al, 2021;Mohammad et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Assessing road vulnerability in seismic conditions: a comprehensive study

Adafer,

Badaoui,

Bensaibi

et al. 2024

SEES

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Road infrastructure is indispensable for societal functionality, yet it is highly susceptible to the devastating impacts of seismic events. This paper focuses on enhancing the resilience of road systems by systematically identifying, quantifying, and assessing factors contributing to their vulnerability during earthquakes. The core objective of this study is to develop and validate a seismic vulnerability index for road sections, which aims to evaluate and classify the susceptibility of road infrastructure to earthquake-induced damage comprehensively. This systematic approach is pivotal for guiding effective mitigation strategies and prioritization efforts. To fulfill this objective, the study employs the Analytic Hierarchy Process (AHP) to introduce a novel methodology for calculating the seismic vulnerability index, incorporating various factors that influence road vulnerability. This method allows for the accurate classification of road sections into distinct levels of susceptibility, providing a solid foundation for implementing targeted interventions and enhancing road resilience. Further, the paper validates the theoretical model through several case studies, demonstrating the practical applicability and effectiveness of the seismic vulnerability index in real-world scenarios. Additionally, the use of Geographic Information System (GIS) technology to simulate earthquake scenarios within an urban road network offers valuable insights into the potential seismic behavior of roads. These simulations are crucial for identifying critical areas that require intervention and for planning resilience-building efforts more effectively. By proposing a comprehensive framework that combines rigorous analysis, empirical validation, and advanced simulation techniques, this paper seeks to make a significant contribution to the field of infrastructure resilience. It aims to advance the understanding of road vulnerability in seismic conditions and supports the development of strategic approaches for enhancing the resilience of road infrastructure against earthquakes. Through the development and validation of a seismic vulnerability index, this study meets its primary objective, providing a valuable resource for researchers, policymakers, and practitioners in disaster management and infrastructure planning.

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Section: Introductionmentioning

confidence: 99%

Assessing road vulnerability in seismic conditions: a comprehensive study

Adafer,

Badaoui,

Bensaibi

et al. 2024

SEES

View full text Add to dashboard Cite

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“…Since these buildings were originally designed to resist gravity loads only, they often suffered serious damage during earthquakes [1][2][3][4]. The importance of protecting their historical and cultural value and the need to guarantee their structural safety to avoid loss of life during earthquakes has increased the interest of researchers and engineers in the study and assessment of their seismic behavior [5][6][7][8][9][10][11] in order to propose the most appropriate retrofitting interventions [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Seismic Vulnerability Evaluation of a Historical Masonry Tower: Comparison between Different Approaches

et al. 2022

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Throughout the last few decades, the scientific community has paid great attention to the structural safety of historical masonry constructions, which have high vulnerability with respect to seismic activities. Masonry towers are very widespread in Italy and represent an important part of the built heritage to be preserved. Different numerical methods with different levels of refinement were developed in the literature to evaluate their seismic performance. The present study shows a practical application of the seismic vulnerability evaluation of a masonry tower using different approaches. The aim is to provide practical suggestions to engineers for the successful evaluation of the performance of masonry towers under seismic loads. An in situ survey was performed to characterize the geometry of the structure and its constitutive material. All the collected information was introduced in a building information model, later used to generate different finite element models for the structural analyses. The global capacity of the structure was evaluated using three different models with different levels of complexity: the first simplified model is made of beam elements with cross-sections discretized in fibers; the second model is made of shell elements and uses a concrete damage plasticity model to describe the nonlinear masonry behavior; the third model adopts solid elements with a concrete smeared crack constitutive law. A preliminary eigen-frequency analysis is performed on the shell model to obtain some basic information about the structural behavior. Nonlinear static analyses were carried out for each model to understand the response of the tower under seismic loads, highlighting the main differences between the approaches. The behavior factor was evaluated on the basis of the analyses results and compared with the ones suggested by the Italian building code. The results showed that the towers do not satisfy the seismic demand required by the standards for all the considered models. Furthermore, the behavior factor calculated according to the Italian design code is overestimated, while the one evaluated by the simplified model is underestimated due to the neglection of the shear behavior. From all the analyzed configurations, the shell model resulted as a good compromise between reliable results and computation efficiency.

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The determination of seismic performance of single-story masonry building

Uzdil

2024

Preprint

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Unreinforced masonry buildings are important for preserving traditional construction techniques for future generations. However, such buildings are generally inadequate against earthquake loads. In this study, a comprehensive evaluation was conducted, taking into account the building's current condition, material properties, and geometric structure. The existing condition of the single-story building and the necessary structural data were collected. In light of these data, various earthquake analyses were performed on the structure. Modern engineering methods, such as response spectrum analysis, nonlinear static pushover analysis, and kinematic analysis, were used. The results showed that high stresses and deformations occurred in certain areas of the structure. In particular, the analyses aimed at identifying weak areas and potential collapse mechanisms revealed critical points in the structure. Based on these findings, recommendations were developed for strengthening the building. Retrofitting strategies include approaches such as improving the structural system, increasing material strength, and integrating new technologies. This study serves as an important guide for assessing the seismic performance of residential buildings and provides a foundation for future research.

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Seismic vulnerability assessment of masonry buildings in Karachi

Cited by 3 publications

References 16 publications

Assessing road vulnerability in seismic conditions: a comprehensive study

Assessing road vulnerability in seismic conditions: a comprehensive study

Seismic Vulnerability Evaluation of a Historical Masonry Tower: Comparison between Different Approaches

The determination of seismic performance of single-story masonry building

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