Seismic Vulnerability Assessment of Old Brick Masonry Buildings: A Case Study of Dhulikhel

Pandey, Subarna; Khadka, Shyam Sundar

doi:10.1007/978-3-031-15758-5_9

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…The seismic behavior and weakness of the minarets were determined. Pandey and Khadka [44] performed a linear dynamic analysis to develop fragility curves for a URM building in mud mortar. The results highlighted that typical URM buildings in Dhulikhel (Nepal) are highly susceptible to out of plane failure.…”

Section: Introductionmentioning

confidence: 99%

Seismic Analysis of Historical Urban Walls: Application to the Volterra Case Study

2023

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Several Italian cities are characterized by the presence of centuries-old historic walls, which have a cultural heritage value and, due to their structural role as a retaining wall, often influence the safety of adjacent buildings and infrastructure. Ancient urban walls are increasingly subject to instability and collapse phenomena, because the greater frequency of extreme meteoric events aggravates the static condition of the walls and of the wall–soil system. Since the seismic risk in the contexts in which the historical urban walls are located is often medium-high, it is advisable to evaluate the influence of soil moisture on the seismic response of the soil–structure system. In this paper, the seismic vulnerability of historical urban walls was examined through considering scenarios of both dry and wet soil, in order to evaluate the seismic response of the structure as a function of soil imbibition. Seismic vulnerability analyses were carried out on the case study of the historical urban masonry walls of Volterra (Italy), which have been affected by two major collapses in the last ten years. Seismic vulnerability was assessed by means of the limit equilibrium method and the finite element method, and through adopting proper soil imbibition models. The results highlight which sections of the walls are at greater seismic risk due to the presence of soil moisture, as well as the influence of soil imbibition on the structural safety and failure mechanism.

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Section: Introductionmentioning

confidence: 99%

Seismic Analysis of Historical Urban Walls: Application to the Volterra Case Study

2023

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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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Experimental Investigation of Mud Mortar in the Himalayan Region of Nepal

Bashyal,

Bist,

Khadka

2024

Lecture Notes in Civil Engineering

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Seismic Vulnerability Assessment of Old Brick Masonry Buildings: A Case Study of Dhulikhel

Cited by 4 publications

References 3 publications

Seismic Analysis of Historical Urban Walls: Application to the Volterra Case Study

Seismic Analysis of Historical Urban Walls: Application to the Volterra Case Study

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

Experimental Investigation of Mud Mortar in the Himalayan Region of Nepal

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