Influence of ground motion on performance of rc infill frames in the 2016 Ecuador earthquake

A. E. Schultz, A. G. Haro, M. K. Liu, A. Monzón, H. Monzón, F. Lanning, A. Tola

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

On 16 April 2016, a magnitude (Mw) 7.8 earthquake struck coastal Ecuador and generated more than 1,500 aftershocks as of June 19, 2016, many with Mw exceeding 6. The epicenter of the main shock was located approximately 29 km south-southeast of Muisne, and had intensities of VIII and IX over a large affected region in the provinces of Esmeraldas and Manabí. More than 10,500 buildings were damaged or collapsed in urban areas, and more 8,100 in rural areas. The affected buildings were primarily concentrated in the municipalities of Bahía de Caráquez, Calceta, Canoa, Chone, Manta, Muisne, Pedernales, and Portoviejo. Most of the affected buildings were reinforced concrete frames with unreinforced masonry infill and partitions, and most of the observed buildings had typically 4 to 5 stories except in Bahía de Caráquez were many 8- to 10-story buildings were observed. Extensive non-structural damage was observed, as well as structural damage to the RC frames. Ground motion characteristics varied considerably from the strong motions recorded in Pedernales, which had intense east-west motion and an acceleration pulse of 1.4g, to the motions recorded in Chone, which had much lower peak ground accelerations and large energy content in the 0.3 to 1.0 Hz range. Observations of damage are correlated with characteristics of the recorded ground motions in several of the affected cities.

Original languageEnglish (US)
Title of host publication11th National Conference on Earthquake Engineering 2018, NCEE 2018
Subtitle of host publicationIntegrating Science, Engineering, and Policy
PublisherEarthquake Engineering Research Institute
Pages7764-7772
Number of pages9
ISBN (Electronic)9781510873254
StatePublished - 2018
Event11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018 - Los Angeles, United States
Duration: Jun 25 2018Jun 29 2018

Publication series

Name11th National Conference on Earthquake Engineering 2018, NCEE 2018: Integrating Science, Engineering, and Policy
Volume12

Conference

Conference11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018
Country/TerritoryUnited States
CityLos Angeles
Period6/25/186/29/18

Bibliographical note

Funding Information:
The authors served in an earthquake reconnaissance team of experts that visited urban and rural affected sites in Ecuador under the sponsorship of the Earthquake Engineering Research Institute (EERI), and the first author also received financial support from The Masonry Society (TMS). The team received was hosted by the Ecuador Army Corps of Engineers under the guidance of Lt. Col. Xavier Riofrío. The team visited the cities of Pedernales, Chone, Calceta, Canoa, Bahía de Caráquez, Portoviejo and Manta to examine the performance of affected buildings [4].

Publisher Copyright:
© Copyright 2018 by Earthquake Engineering Research Institute All rights reserved.

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