The Mexico Earthquake of September 19, 1985—Typical Cases of Repair and Strengthening of Concrete Buildings

1989 ◽  
Vol 5 (1) ◽  
pp. 175-193 ◽  
Author(s):  
M. Jara ◽  
C. Hernández ◽  
R. García ◽  
F. Robles
Keyword(s):  
Case Studies ◽  
Mexico City ◽  
Damage Assessment ◽  
Analysis And Design ◽  
Concrete Buildings ◽  
Temporary Protection ◽  
Practical Design ◽  
Mexico Earthquake ◽  
Emergency Measures ◽  
Made In

It is the aim of this paper to describe the most important techniques that are being used in Mexico City to retrofit buildings damaged during the 1985 earthquake. The information is presented by means of four case studies. These cases offer practical design examples of the typical solutions adopted and illustrate the various aspects of the repair and strengthening process such as damage assessment, emergency measures for temporary protection, the retrofitting technique employed in each case and considerations and decisions made in the analysis and design.

The Mexico Earthquake of September 19, 1985—Statistics of Damage and of Retrofitting Techniques in Reinforced Concrete Buildings Affected by the 1985 Earthquake

1989 ◽  
Vol 5 (1) ◽  
pp. 145-151 ◽  
Author(s):  
J. Aguilar ◽  
H. Juárez ◽  
R. Ortega ◽  
J. Iglesias
Keyword(s):  
Reinforced Concrete ◽  
Statistical Analysis ◽  
Data Base ◽  
Mexico City ◽  
Failure Modes ◽  
Reinforced Concrete Buildings ◽  
Concrete Buildings ◽  
Mexico Earthquake

The 1985 Mexico City earthquake caused very serious damage, especially in reinforced concrete buildings, making it necessary to repair and strengthen many structures. The authors had the opportunity to study 114 of these retrofitted buildings. The data base created with the collected information contains the description of the building, its damages and the retrofitting techniques used. The statistical analysis of this information makes it possible to identify the correlation among the structural and foundation types, the dominant failure modes, the causes of damage and the repair and strengthening techniques used in this group of buildings.

scholarly journals Damage assessment and seismic behavior of steel buildings during the Mexico earthquake of 19 September 2017

2020 ◽  
Vol 36 (1) ◽  
pp. 250-270 ◽  
Author(s):  
Edgar Tapia-Hernández ◽  
J. Salvador García-Carrera
Keyword(s):  
Mexico City ◽  
Damage Assessment ◽  
Structural Damage ◽  
Steel Structures ◽  
Structural Elements ◽  
Steel Buildings ◽  
Ground Shaking ◽  
Design Procedures ◽  
Mexico Earthquake ◽  
Epicentral Region

During the 19 September 2017 earthquake, steel buildings in the States of Morelos, Puebla, Mexico, and Mexico City were subjected to severe ground shaking. Despite in some cases, moderate damages in non-structural elements were developed; generally, null or minor structural damage was reported. The notable exceptions are (1) a three-stories building located at the southern area of Mexico City and (2) some schools near to the epicentral region in the State of Morelos. The behavior of these buildings is analyzed in detail. Conclusions are drawn on the demands imposed on steel structures considering the actual demands in order to underline the relevance of the normative design procedures.

The Mexico Earthquake of September 19, 1985—Behavior of Steel Buildings

1989 ◽  
Vol 5 (1) ◽  
pp. 51-88 ◽  
Author(s):  
J. Osteraas ◽  
H. Krawinkler
Keyword(s):  
Case Studies ◽  
Mexico City ◽  
Structural Models ◽  
Code Design ◽  
Steel Buildings ◽  
Design Strength ◽  
Actual Strength ◽  
Mexico Earthquake ◽  
Story Building

During the September 19, 1985 earthquake about 60 post-1957 multistory steel buildings in Mexico City were subjected to a severe test. In most cases, the damage in the post-1957 structures was minor to moderate. The notable exception is the Pino Suarez complex in which one 21-story building collapsed onto a 14-story building, and two other 21-story buildings were severely damaged. The behavior of these buildings as well as two other case studies are analyzed. Conclusions are drawn on the ductility demands imposed on steel buildings in Mexico City, utilizing simplified structural models and considering the actual strength of buildings that may be much higher than the code design strength.

Performance of Retrofitted Concrete Buildings during the September 19, 2017 Earthquake in Mexico City

2019 ◽  
Author(s):  
Juan Murcia-Delso ◽  
Oriol Arnau
Keyword(s):  
Mexico City ◽  
Damage Assessment ◽  
Strong Earthquake ◽  
Field Investigation ◽  
Period Range ◽  
Seismic Demands ◽  
Actual Performance ◽  
Concrete Buildings ◽  
Steel Bracing ◽  
Different Levels

<p>The 1985 Mexico City earthquake resulted in extensive damage and collapse of concrete construction. In the months and years following this earthquake, there was an unparalleled effort to repair and retrofit concrete buildings. On September 19, 2017, a new strong earthquake struck Mexico City. This event represented the first severe test for concrete buildings retrofitted after 1985, providing an unprecedented opportunity to study the actual performance of the retrofitting techniques applied in these buildings. This paper presents results of a field investigation and damage assessment of three retrofitted concrete buildings after the 2017 earthquake. The structures studied suffered different levels of damage during the 1985 earthquake, and they were subsequently repaired and retrofitted using a variety of techniques (e.g., jacketing of columns and beams, addition of steel bracing, RC infill walls). Except for the excessive tilting of one of the structures, the buildings presented minor damage after the 2017 event. The shaking intensities of 2017 can be considered similar to those of 1985 in the period range of interest for these buildings, while the structures presented in general better performance thanks to an increase of their capacity and/or a decrease of the seismic demands.</p>

The September 7, 2017 Tehuantepec, Mexico, earthquake: Damage assessment in masonry structures for housing

2021 ◽  
Vol 56 ◽  
pp. 102123
Author(s):  
Eber Alberto Godínez-Domínguez ◽  
Arturo Tena-Colunga ◽  
Luis Eduardo Pérez-Rocha ◽  
Hans Israel Archundia-Aranda ◽  
Alonso Gómez-Bernal ◽  
...  
Keyword(s):  
Damage Assessment ◽  
Earthquake Damage ◽  
Masonry Structures ◽  
Mexico Earthquake ◽  
Earthquake Damage Assessment

scholarly journals The 2011 Tohoku Tsunami from the Sky: A Review on the Evolution of Artificial Intelligence Methods for Damage Assessment

Geosciences ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 133
Author(s):  
Jérémie Sublime
Keyword(s):  
Artificial Intelligence ◽  
Case Studies ◽  
Damage Assessment ◽  
Structural Damage ◽  
North East ◽  
2011 Tohoku Tsunami ◽  
Artificial Intelligence Methods ◽  
The Future ◽  
Tohoku Tsunami

The Tohoku tsunami was a devastating event that struck North-East Japan in 2011 and remained in the memory of people worldwide. The amount of devastation was so great that it took years to achieve a proper assessment of the economical and structural damage, with the consequences still being felt today. However, this tsunami was also one of the first observed from the sky by modern satellites and aircrafts, thus providing a unique opportunity to exploit these data and train artificial intelligence methods that could help to better handle the aftermath of similar disasters in the future. This paper provides a review of how artificial intelligence methods applied to case studies about the Tohoku tsunami have evolved since 2011. We focus on more than 15 studies that are compared and evaluated in terms of the data they require, the methods used, their degree of automation, their metric performances, and their strengths and weaknesses.

Mexican Migration and the Social Space of Postmodernism

1991 ◽  
Vol 1 (1) ◽  
pp. 8-23
Author(s):  
Roger Rouse
Keyword(s):  
United States ◽  
Los Angeles ◽  
Mexico City ◽  
Latin American ◽  
Social Space ◽  
The United States ◽  
Mexican Migration ◽  
Single Word ◽  
The Social ◽  
Made In

In a hidden sweatshop in downtown Los Angeles, Asian and Latino migrants produce automobile parts for a factory in Detroit. As the parts leave the production line, they are stamped “Made in Brazil.” In a small village in the heart of Mexico, a young woman at her father’s wake wears a black T-shirt sent to her by a brother in the United States. The shirt bears a legend that some of the mourners understand but she does not. It reads, “Let’s Have Fun Tonight!” And on the Tijuana-San Diego border, Guillermo Gómez-Peña, a writer originally from Mexico City, reflects on the time he has spent in what he calls “the gap between two worlds”: “Today, eight years after my departure, when they ask me for my nationality or ethnic identity, I cannot answer with a single word, for my ‘identity’ now possesses multiple repertoires: I am Mexican but I am also Chicano and Latin American. On the border they call me ‘chilango’ or ‘mexiquillo’; in the capital, ‘pocho’ or ‘norteno,’ and in Spain ‘sudaca.’… My companion Emily is Anglo-Italian but she speaks Spanish with an Argentinian accent. Together we wander through the ruined Babel that is our American postmodemity.”

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