Abstract
Adobe construction represents 5.3% of the total Portuguese building stock according to the latest National Housing Census. The distribution of these adobe buildings is scattered across the country, with higher density in the central region and in Algarve in the south, where the seismic hazard is highest. A large proportion of these buildings are still in use for residential and commercial purposes and are of historical significance, contributing to the cultural heritage of the country. Adobe buildings are known to exhibit low seismic resistance due to their brittle behavior, thus making them vulnerable to ground shaking and more prone to structural damage that can potentially cause human fatalities. Three buildings with one-story, two-stories, and two-stories plus an attic were numerically modeled using solid and contact elements. Calibration and validation of material properties were carried out following experimental results. A set of 30 ground motion records with bi-directional components were selected, and non-linear time-history analyses were performed until complete collapse occurred. Two novel engineering demand parameters (EDPs) were used, and damage thresholds were proposed. Finally, fragility and fatality vulnerability functions were derived. These functions can be used directly in seismic risk assessment studies.
Highlights
In this study, the seismic vulnerability assessment of three Portuguese adobe buildings was conducted to derive fragility and fatality vulnerability functions, which can be used to estimate losses due to earthquakes
It can be observed that the central region of Portugal has try, due to the existence of sandy soils and the presence of lime, which has been reported the highest density of adobe buildings, since it was the prevailing construction system to be used as a stabilizing agent
It can be observed that the central region of Portugal has adopted for the first half of the 20th century [15] and the legacy from the patrimony built the highest density of adobe buildings, since it was the prevailing construction system in that period is still significant
Summary
Modeling Strategies for the Computational Analysis of Unreinforced Masonry Structures: Review and Classification. Simulation of the in-plane structural behavior of unreinforced masonry walls and buildings using DEM. Tie-Break Contacts in LS-DYNA; Livemore Software: Livermore, CA, USA, 2007. Hazard Disaggregation and Record Selection for Fragility Analysis and Earthquake. J.O. LS Dyna Theory Manual; Livemore Software: Livermore, CA, USA, 2006. A.; Humberto, V.; João, M.G. Structural Rehabilitation of Old Buildings; Springer: Berlin/Heidelberg, Germany, 2014. Derivation of Globally Applicable Casualty Rates for use in Earthquake Loss Estimation Models. In Proceedings of the 15th World Conference Earthquake Engineering, Lisbon, Portugal, 24–28 September 2012. Vamvatsikos, D.; Cornell, C.A. Incremental dynamic analysis. Incremental Dynamic Analysis of Single Degree of Freedom Approximation. Description for indoor space damage degree of building in earthquake. Conference on Earthquake Engineering, Acapulco, Mexico, 23–28 June 1996
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have