Seismic response of a typical shear-wall dominated high-rise condominium building during the January 7, 2020 Mw6.4 Indios, Puerto Rico earthquake

Mehmet Celebi; Eduardo Miranda; Jose A. Martinez-Cruzado

doi:10.1061/(asce)st.1943-541x.0003210

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Seismic response of a typical shear-wall dominated high-rise condominium building during the January 7, 2020 Mw6.4 Indios, Puerto Rico earthquake

Mehmet Celebi·Eduardo Miranda·Jose A. Martinez-Cruzado

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Abstract

Seismic response records were retrieved from the monitored 21-story (53.26-m-tall) typical Puerto Rican reinforced-concrete shear-wall dominated El Castillo Building in Mayaguez, 50 km from the mainshock epicenter of the January 7, 2020, M w 6.4 offshore Indios, Puerto Rico earthquake. The shear-wall-to-floor areas of the building are 0.97 and 3.49 in the longitudinal and transverse directions, respectively, and have a slenderness ratio of 3.0 in the transverse direction. Basement and top-floor peak accelerations were 5% g and 12.8% g, respectively. Additionally, records from a nearby free-field station indicate a site period of 0.16 s. No visible damage was observed in the building after the earthquake. Spectral ratios and system identification allow identification of the transverse, longitudinal, and torsional fundamental periods as 0.97, 0.88, and 0.81 s, respectively, and are consistent with ASCE/SEI 7-16 (2017) formula. Damping percentages are 4.5%, 3.4%, and 2.2%, respectively. The maximum drift ratios are 0.20% and 0.12% in the longitudinal and transverse directions, well below the damage threshold for structural elements of ∼0.5%.

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Journal of Structural Engineering Article

Source-reported bounding extent: 18.217265132209803° to 18.477329701813787° latitude; -67.15950965881346° to -66.01856231689453° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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Mehmet Celebi, Eduardo Miranda, Jose A. Martinez-Cruzado. 2021. Seismic response of a typical shear-wall dominated high-rise condominium building during the January 7, 2020 Mw6.4 Indios, Puerto Rico earthquake. https://doi.org/10.1061/(asce)st.1943-541x.0003210

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