Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of Pre-existing Damage on Fragility of URM and RC Frame Buildings
After the recent earthquake sequences that have hit Italy, New Zealand, and other parts of the world, the evidence that damage in buildings that experienced multiple shocks is, in general, more severe at the end of the sequence than after the mainshock is even more apparent and better documented. However, analytical studies still struggle in providing realistic estimates of how the damage progresses during a sequence of shocks. Predicting damage accumulation is of paramount importance for achieving accurate risk estimates for building stocks in all regions of the world where earthquake sequences are common. This study attempts to provide a framework for generating damage-state-dependent seismic fragility functions for two types of structures: unreinforced masonry buildings (URMs) and reinforced concrete frame buildings (RCFs). We adopted a component-based approach for estimating damage, built on energy-based parameters. In the case of URMs, we consider the energy released through shear damage of masonry components. For RCFs, we utilized the modified Park and Ang damage index. The findings suggest that estimates of maximum global or local deformation experienced during a shock are not fit to model damage progression throughout earthquake sequences. Furthermore, a component-based methodology with local parameters is superior to using global response parameters, such as maximum inter-story drift ratio. However, this study’s results suggest that the ground to cover before achieving defensible cumulative damage estimates is still considerable. The need to develop and calibrate demand parameters to capture the progression of damage through all damage states with better precision is needed but not yet within our reach.
Effects of Pre-existing Damage on Fragility of URM and RC Frame Buildings
After the recent earthquake sequences that have hit Italy, New Zealand, and other parts of the world, the evidence that damage in buildings that experienced multiple shocks is, in general, more severe at the end of the sequence than after the mainshock is even more apparent and better documented. However, analytical studies still struggle in providing realistic estimates of how the damage progresses during a sequence of shocks. Predicting damage accumulation is of paramount importance for achieving accurate risk estimates for building stocks in all regions of the world where earthquake sequences are common. This study attempts to provide a framework for generating damage-state-dependent seismic fragility functions for two types of structures: unreinforced masonry buildings (URMs) and reinforced concrete frame buildings (RCFs). We adopted a component-based approach for estimating damage, built on energy-based parameters. In the case of URMs, we consider the energy released through shear damage of masonry components. For RCFs, we utilized the modified Park and Ang damage index. The findings suggest that estimates of maximum global or local deformation experienced during a shock are not fit to model damage progression throughout earthquake sequences. Furthermore, a component-based methodology with local parameters is superior to using global response parameters, such as maximum inter-story drift ratio. However, this study’s results suggest that the ground to cover before achieving defensible cumulative damage estimates is still considerable. The need to develop and calibrate demand parameters to capture the progression of damage through all damage states with better precision is needed but not yet within our reach.
Effects of Pre-existing Damage on Fragility of URM and RC Frame Buildings
Lecture Notes in Civil Engineering
Benavent-Climent, Amadeo (Herausgeber:in) / Mollaioli, Fabrizio (Herausgeber:in) / de Quevedo Iñarritu, P. García (Autor:in) / Šipčić, N. (Autor:in) / Kohrangi, M. (Autor:in) / Bazzurro, P. (Autor:in)
International Workshop on Energy-Based Seismic Engineering ; 2021 ; Madrid, Spain
01.05.2021
18 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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