Journal of Primeasia
Integrative Disciplinary Research | Online ISSN 3064-9870 | Print ISSN 3069-4353
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Volume 2 Number 1 2021
RESEARCH ARTICLE (Open Access)
Evaluation of Low-Rise Reinforced Concrete Structures for Seismic Damage Based on Performance for Earthquake Resilience
Nipa Akter1*, Erfanur-Bin-Alam1
Journal of Primeasia 2 (1) 1-8 https://doi.org/10.25163/primeasia.2110766
Submitted: 31 January 2021 Revised: 08 April 2021 Accepted: 14 April 2021 Published: 16 April 2021
Abstract
Background: Earthquakes generate major risks which threaten buildings to the extent that they endanger the structural health of reinforced concrete buildings with low-rise designs which form the majority of urban building stock. Seismic engineering has not solved the problem because buildings still fail to perform well during earthquakes because of construction flaws and weak building code enforcement and deteriorating building materials. The research studies performance-based seismic damage assessment which determines how structures respond to earthquakes and their ability to endure damage. Methods: Distributed 195 structured surveys to experts who worked as structural engineers and civil engineers and urban planners and researchers. Descriptive statistics together with percentage analysis and Pearson correlation to study the connections between Damage Index (DI) and structural integrity and code compliance and soil stability and retrofitting level. Results: The results show that 31.3% of buildings experienced moderate damage and 27.7% suffered extensive damage, while only 7.2% remained undamaged. The evaluation process revealed that 37.4% of buildings required Life Safety measures and 33.8% needed Collapse Prevention protection. The analysis shows that Damage Index values decrease when retrofitting levels increase (r = - 0.73) because retrofitting work strengthens buildings to resist earthquakes. Conclusion: The study shows that low-rise RC buildings face moderate to high risk of earthquake damage. Construction quality needs improvement together with seismic design standards enforcement and expanded retrofitting programs to create earthquake-resistant structures which will reduce their potential for damage.
Keywords: Seismic damage, RC buildings, vulnerability, performance-based assessment, retrofitting
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