The September 1985 Mexico earthquakes

Butcher, G. W.; Hopkins, David; Jury, Rob; Massey, W.; McKay, Graham; McVerry, Graeme H.

doi:10.5459/bnzsee.21.1.3-96

Cited by 14 publications

(8 citation statements)

References 6 publications

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“…On firm soil, i.e. in the hill zone, the maximum horizontal acceleration recorded was between 0.01 and 0.04 g. On the soft soil, however, the peak ground accelerations of up to 0.17 g were recorded [30]. Very high spectral acceleration amplitudes around 2 s were measured in soft soil zones and a long shaking duration included several damaging cycles at such sites.…”

Section: Michoacán Earthquakementioning

confidence: 89%

“…The 1985 Michoacán earthquake led to extensive damage in Mexico City with 757 buildings which suffered severe damage, partial or total collapse [18]. The death toll was estimated around 8,000 -16,000 [30]. Intensities felt in the soft soil zones of Mexico City were much higher than in firm soil zone regions.…”

Section: Michoacán Earthquakementioning

confidence: 99%

“…They assessed the extent of damage and gathered information on the unique characteristics of this earthquake. Readers interested in detailed findings following the 1985 reconnaissance mission are directed to the final report of the New Zealand team [30].…”

Section: Michoacán Earthquakementioning

confidence: 99%

“…For damaged buildings, wherever possible, the building's owner tended to avoid demolition and rather chose to repair and retrofit the buildings. Various documents following the 1985 earthquake explain the techniques and solutions employed to reinforce and retrofit the structures [30,36,[38][39][40][41].…”

Section: Performance Of Retrofitted Concrete Buildingsmentioning

confidence: 99%

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The September 19th, 2017 Puebla, Mexico earthquake

Roeslin

Juárez-García

Elwood

et al. 2020

BNZSEE

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This report presents the observations and findings following the 2017 Puebla earthquake that occurred inMexico on September 19th, 2017. The reconnaissance mission was a collaboration between the New ZealandSociety of Earthquake Engineering (NZSEE), the Universidad Autónoma Metropolitana (UAM) Azcapotzalco,the American Concrete Institute (ACI) Disaster Reconnaissance team, and the Colegio de Ingenieros Civilesde Mexico (CICM). During the earthquake, 77 buildings suffered partial or total collapse and more than8,000 buildings experienced damage ranging from slight damage to significant structural damage necessitatingdemolition. As observed in previous earthquakes, the unique soil conditions of Mexico City resulted inextensive damage to the city’s infrastructure, primarily due to local site effects. The earthquake causedrelatively more damage to buildings built on transition and soft soil zones (i.e. between hard and deep softsoils) than those on hard soils.The NZSEE and UAM team focussed on areas with widespread and extensive damage. They also assessedthe performance of repaired and retrofitted buildings after the 1985 Michoacán earthquake. It was found thatthe lessons learnt from the 1985 Michoacán earthquake led to some risk mitigation measures which benefitedseveral buildings in the 2017 earthquake. Retrofitted buildings were found to have performed very well withlittle or no damage when compared to other buildings.

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Section: Michoacán Earthquakementioning

confidence: 89%

Section: Michoacán Earthquakementioning

confidence: 99%

Section: Michoacán Earthquakementioning

confidence: 99%

Section: Performance Of Retrofitted Concrete Buildingsmentioning

confidence: 99%

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The September 19th, 2017 Puebla, Mexico earthquake

Roeslin

Juárez-García

Elwood

et al. 2020

BNZSEE

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“…In addition to the special issues of the Bulletin published on recent New Zealand earthquakes (i.e. the 2010 Darfield earthquake, 2011 Christchurch earthquake and 2016 Kaikōura earthquake), it has also published reconnaissance reports on major overseas earthquakes including the 1985 Mexico earthquake [30], 2008 Wenchuan earthquake in China [31], 2009 Padang earthquake in Indonesia [32], 2015 Gorkha earthquake in Nepal [33], 2016 Kumamoto earthquake in Japan [34,35] and the 2016 Meinong earthquake in Taiwan [36]. Given the geological similarity between the soft lakebed in Mexico City and soft soil deposits in New Zealand cities, the ground motion characteristics and the building performance in this earthquake will be of significant interest to New Zealand earthquake engineers and seismologists.…”

mentioning

confidence: 99%

Seismic performance of non-structural elements (SPONSE) and Learning from earthquakes (LFE)

Dhakal

2020

BNZSEE

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This issue of the NZSEE Bulletin presents four papers covering diverse topics spanning into seismic performance of nonstructural elements (SPONSE) and learning from earthquakes (LFE). The first paper by Haymes et al. [1] presents a practiceoriented method to generate floor displacement and acceleration response spectra for elastically responding structures. This method enables improved prediction of floor acceleration demands for acceleration sensitive non-structural components and contents provided the building period is known. Given the floor acceleration profile currently specified in NZS1170.5; i.e. the New Zealand Loadings Standard for Earthquake Actions, for seismic design of parts and components is crude, this paper provides useful information that can potentially help refine the guidelines related to floor acceleration demands for non-structural components and contents in buildings.

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