Mexico City during and after the September 19, 2017 earthquake: Assessment of seismic resilience and ongoing recovery process

The simplicity, timeliness, and reliability of a post-earthquake assessment are fundamental for decision-makers in emergency management. An adequate risk assessment will help during the recovery and, therefore, increases the resilience of the community. Although within this context, the walk-down damage survey with the correct filling of evaluation forms and use of processing-data tools make possible a pertinent post-earthquake assessment, it is desirable to have measurable parameters that can complement the visual field evaluation with quantitative information. In some cases, basic quantitative measures, such as crack width, are not enough to make pertinent structural damage assessments. This article presents a fast and simple methodology to estimate the median maximum displacement and plastic energy demands on simple single-degree-of-freedom systems from the residual displacement they exhibit after being subjected to ground motions generated in the lakebed zone of Mexico City. Based on this, a discussion is offered on how a post-earthquake assessment can be improved by complementing the visual and measured information gathered on an existing structural system after an intense ground motion, with estimates of its maximum and cumulative plastic deformation demands derived from its residual deformation.

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Long duration and frequent, intense earthquakes: Lessons learned from the 19 September 2017 earthquake for Mexico City’s resilience

Earthquake Spectra ◽

10.1177/8755293020942548 ◽

2020 ◽

Vol 36 (2_suppl) ◽

pp. 49-61

Author(s):

Pablo Quinde ◽

Eduardo Reinoso

Keyword(s):

Mexico City ◽

Structural Damage ◽

Lessons Learned ◽

Cumulative Damage ◽

Plastic Energy ◽

Energy Demands ◽

Long Duration ◽

Structural Failures ◽

The City ◽

Seismic Resilience

The accumulation of plastic deformations during an intense earthquake may cause structural failures at deformations significantly smaller than those that can be developed under monotonic load. However, there is evidence that, under certain circumstances, the response of a single parameter may not be a good indicator of structural damage. Likewise, most of the seismic regulations, including the Mexican standards, establish their criteria considering the occurrence of strong earthquakes with a very little probability of occurrence, but do not consider if intense earthquake affects the building frequently and, therefore, cumulative damage due to the occurrence of several earthquakes during the life span of the structure is not taken into account explicitly. This cumulative damage is especially important in places like Mexico City, where intense and long-duration earthquakes occur every 10–20 years. To study the issues that Mexico City must face to increase its seismic resilience, in this article, we present an analysis of the dissipated plastic energy demands in Mexico City during the earthquake of 19 September 2017, and the cumulative damage due to recent intense earthquakes that affect the city.

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Servicing the Senior Swallow: A Family-Centered Private Practice Model of Service Delivery

Perspectives of the ASHA Special Interest Groups ◽

10.1044/2020_persp-20-00134 ◽

2020 ◽

pp. 1-4 ◽

Cited By ~ 1

Author(s):

Yvette M. McCoy

Keyword(s):

Older Adults ◽

Medical Model ◽

Recovery Process ◽

Swallowing Disorders ◽

Current Evidence ◽

Care Needs ◽

Skilled Nursing ◽

Person Centered Care ◽

Centered Care ◽

Traditional Medical Model

Purpose Person-centered care shifts the focus of treatment away from the traditional medical model and moves toward personal choice and autonomy for people receiving health services. Older adults remain a priority for person-centered care because they are more likely to have complex care needs than younger individuals. Even more specifically, the assessment and treatment of swallowing disorders are often thought of in terms of setting-specific (i.e., acute care, skilled nursing, home health, etc.), but the management of dysphagia in older adults should be considered as a continuum of care from the intensive care unit to the outpatient multidisciplinary clinic. In order to establish a framework for the management of swallowing in older adults, clinicians must work collaboratively with a multidisciplinary team using current evidence to guide clinical practice. Private practitioners must think critically not only about the interplay between the components of the evidence-based practice treatment triad but also about the broader impact of dysphagia on caregivers and families. The physical health and quality of life of both the caregiver and the person receiving care are interdependent. Conclusion Effective treatment includes consideration of not only the patient but also others, as caregivers play an important role in the recovery process of the patient with swallowing disorders.

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