Seismic fragility of a reinforced concrete building using vector-valued seismic intensity measures based on spectral shape
DOI:
https://doi.org/10.37636/recit.v5n2e220Keywords:
Intensity measures, Spectral shape, Structural response, Fragility surfaces, Seismic performance, Seismic fragilityAbstract
Vector-valued seismic intensity measures have shown to be more efficient compared to traditional intensity measures for predicting the response of structures with non-linear behavior or those dominated by higher modes; however, few studies have demonstrated the capability of these new measures to estimate the seismic fragility of buildings with good accuracy. In the present work, eight vector-valued seismic intensity measures composed of two parameters were analyzed. For all cases, the pseudo-acceleration at the fundamental mode of vibration of the structure, Sa (T1), was used as the first component of the vector and the Maximum Soil Acceleration (AMS), Maximum Soil Velocity (VMS), effective duration (TD), seismic potential (ID) and the spectral shape parameters RT1, T2, NpSa, NpV, and NpSv, as the second component of the vectors. In order to evaluate the efficiency of the selected intensity measures in the seismic fragility analysis, a 10-level reinforced concrete building was subjected to 30 narrow-band seismic records obtained from México City. The results have shown that the vector-valued seismic intensity measures that presents a better relation with the probability of failure is <Sa (T1), NpSa> compared to the other parameters; especially regarding Sa (T1) which is widely used in current building codes. Therefore, it is desirable that future building regulations should consider more appropriate seismic intensity measures.
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Copyright (c) 2022 Noel Zavala Gutiérrez, Edén Bojórquez Mora, Manuel Antonio Barraza Guerrero, Juan Bojórquez Mora, Almendra Villela y Mendoza, José Ignacio Torres Peñuelas, José Rubén Campos Gaytán, Ricardo Sánchez Vergara
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