Effect of seismic sequences in reinforced concrete frame buildings located in soft-soil sites |
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| Institution: | 1. Facultad de Ingeniería Civil, Universidad Michoacana de San Nicolás de Hidalgo, Edificio C, Planta Baja, Ciudad Universitaria, 58040 Morelia, Mexico;2. Departamento de Materiales, Universidad Autónoma Metropolitana-Azcapotzalco, 02200 México D.F., Mexico;1. Instituto de Ingeniería, UNAM, Ciudad Universitaria, Coyoacán 04510, México D.F, México;2. Departamento de Materiales, Universidad Autónoma Metropolitana, Av. San Pablo 180, Col. Reynosa Tamaulipas 02200, México D.F, México;1. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China;2. Key Lab of Smart Prevention and Mitigation of Civil Engineering Disaster of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China;1. Instituto de Ingeniería, Universidad Nacional Autónoma de México, Edificio 2, Cd. Universitaria, 04510 México DF, México;2. Facultad de Ingeniería Civil, Universidad Michoacana de San Nicolás de Hidalgo Edificio C, Planta Baja, Cd. Universitaria, 58040 Morelia, México;3. School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Pariser Building, Manchester M13 9PL, UK;1. Department of Engineering, University of Sannio, Benevento, Italy;2. Department of Civil Engineering and Industrial Design, University of Liverpool, Liverpool, UK;3. Structural Engineering Research Center, International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran;1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;2. Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, Heilongjiang, China;3. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China |
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| Abstract: | On September 19 and 20, 1985, two strong subduction interface earthquakes struck Mexico City leading to a large stock of damaged, or even collapsed, reinforced concrete (RC) building structures located in soft soil sites of the former lake-bed zone. The aim of this study is to gain further understanding on the effects of soft-soil seismic sequences on the seismic response of RC framed-buildings. This investigation employed artificial sequences since only two real sequences were gathered during the 1985 earthquakes. The nonlinear response, in terms of peak and residual lateral inter-story drift demands of four RC buildings having 4, 8, 12, and 16 stories, was evaluated. Results show that the relationship of the damaged period of the building (i.e. period of the building after the mainshock) to the predominant period of the aftershock, which is a measure of its frequency content, has a significant impact in the building response. |
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| Keywords: | Aftershocks Seismic sequences Frequency content Peak drift demands Residual drift demands |
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