Document Type : Original Article

Authors

• Ali ALRAWAS
• Reem ALSEHNAWI

Higher Institute of Earthquake Studies&Researches, University of Damascus, Syria

Abstract

Obtaining a collapse fragility curve is essential for loss estimation and structural safety studies, especially for vital facilities such as health centres. Many methods have been presented to develop fragility curves, such as the analytical method, which involves performing a series of nonlinear dynamic analyses, and empirical methods. This paper presents a study on the seismic performance assessment against the collapse of code-compliant reinforced concrete buildings. The study was carried out at Al-Qutayfah Hospital, located in a moderate seismicity area in Rif Dimashq, Syria. This hospital is representative of many modern hospitals built after 2004. A 3D analytical model was created using CSI-PERFORM 3D. The shear wall cross-section was modelled as a fibre section and a concentrated hinge for the frames to capture the essential nonlinear behaviour of the main elements and the potential collapse mode. An incremental dynamic analysis was performed using 11 pairs of ground motion records in accordance with FEMA P-58 recommendations to derive the collapse fragility and compare it to another result that converts the static pushover curve to an incremental dynamic analysis curve using the Vamvatsikos & Cornell method known as SPO2IDA. The results showed that the building had a low and acceptable probability of collapse under the code-defined MCE intensity level and that the SPOTOIDA method provides a reliable estimate of collapse fragility, saving time and effort.

Keywords

• Collapse
• Fragility Curve
• Incremental dynamic analysis
• Seismic hazard
• Reinforced concrete buildings