Collapse risk assessment of a Chilean dual wall-frame reinforced concrete office building

Araya-Letelier, Gerardo; Parra, Pablo F.; López-García, Diego; Garcia-Valdes, A.; Candia, Gabriel; Lagos, René

doi:10.1016/j.engstruct.2019.01.006

Cited by 13 publications

(4 citation statements)

References 28 publications

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“…SPRA is examined based on a conditional probability, where the measure of the damage exceeds a threshold at a given intensity measure of a structure [8]. Characteristics of structures can be used to determine structure activities and to assess structural safety for the analysis by SPRA using numerical analysis, applied to estimate structural fragility and assess the risk of collapse [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Gaussian Process Regression-Based Structural Response Model and Its Application to Regional Damage Assessment

Park

Jung

2021

IJGI

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Seismic activities are serious disasters that induce natural hazards resulting in an incalculable amount of damage to properties and millions of deaths. Typically, seismic risk assessment can be performed by means of structural damage information computed based on the maximum displacement of the structure. In this study, machine learning models based on GPR are developed in order to estimate the maximum displacement of the structures from seismic activities and then used to construct fragility curves as an application. During construction of the models, 13 features of seismic waves are considered, and six wave features are selected to establish the seismic models with the correlation analysis normalizing the variables with the peak ground acceleration. Two models for six-floor and 13-floor buildings are developed, and a sensitivity analysis is performed to identify the relationship between prediction accuracy and sampling size. A 10-fold cross-validation method is used to evaluate the model performance, using the R-squared, root mean squared error, Nash criterion, and mean bias. Results of the six-parameter-based model apparently indicate a similar performance to that of the 13-parameter-based model for the two types of buildings. The model for the six-floor building affords a steadily enhanced performance by increasing the sampling size, while the model for the 13-floor building shows a significantly improved performance with a sampling size of over 200. The results indicate that the heighted structure requires a larger sampling size because it has more degrees of freedom that can influence the model performance. Finally, the proposed models are successfully constructed to estimate the maximum displacement, and applied to obtain fragility curves with various performance levels. Then, the regional seismic damage is assessed in Gyeonjgu city of South Korea as an application of the developed models. The damage assessment with the fragility curve provides the structural response from the seismic activities, which can assist in minimizing damage.

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Section: Introductionmentioning

confidence: 99%

Gaussian Process Regression-Based Structural Response Model and Its Application to Regional Damage Assessment

Park

Jung

2021

IJGI

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“…Most respondents from the European regions indicated the above interpretation, while the Chilean respondents probably associate wooden houses with a summer house or a temporary housing solution [79]. In Chile, the currently predominant building types, such as reinforced masonry houses and reinforced concrete buildings, are more often chosen because of-among other factors-their tested adequate seismic performance [80,81].…”

Section: Discussionmentioning

confidence: 99%

The Future of Wood Construction: Opportunities and Barriers Based on Surveys in Europe and Chile

et al. 2022

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The demand for wood has increased in recent years due to new technical possibilities and environmental concerns. This paper provides an analysis of the factors that affect the use of wood in the construction sector, and an assessment of their importance in individual countries and for groups of stakeholders. The study covers the technical, societal, political, economic, and gender aspects of wood construction, with the aim of increasing global understanding regarding national differences, the current situation, and the potential for further development. The subject was investigated using a survey, and the most important opportunities for and barriers to growth in the use of wood in the construction sector were selected, following a statistical analysis. The results indicate strong regional and cultural differences regarding the acceptance of some of the opportunities and barriers related to the development of wood construction. The findings indicate that there is a need to promote wood construction based on its technical and economic benefits rather than its societal ones. On the other hand, the current societal barriers should be addressed as a priority, together with the establishment of common and harmonized policies. The results of this study, therefore, will contribute to the generation of regional-sensitive information that can be useful for policymakers when updating the building codes in their individual countries.

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“…An interesting case-study of an irregular high building with RC walls has been provided by [16] in which the authors identified the possible reasons of building collapse during the 2010 Chile earthquake. The damage of code-conforming reinforced concrete buildings during that earthquake also motivated the research presented in [17] in which a Chilean code-conforming reinforced concrete office building was designed, consisting of shear walls and moment frames. Its collapse potential was evaluated and fragility functions obtained through incremental dynamic analyses.…”

Section: Introductionmentioning

confidence: 89%

Seismic Performance Assessment of an Existing RC Wall Building with Irregular Geometry: A Case-Study of a Hospital in Croatia

et al. 2020

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Buildings of strategic importance should be able to resist seismic forces in accordance with potential earthquakes that may occur at the location and remain fully operational afterwards. However, many of them were constructed before the modern principles of seismic design were known (especially regarding detailing and ductility), and therefore may be considered substandard. The first step in mitigating the seismic risk of such structures is to assess their seismic performance and, in particular, to identify their structural deficiencies. This study presents a comprehensive methodology for the seismic performance assessment of individual buildings, applied to an existing reinforced concrete (RC) hospital. This building is of an irregular layout, constructed as a structural wall system, and it is located in the seismically active region of Croatia. It includes the assessment of seismic hazards on the location, ambient noise measurements, experimental determination of structural modal parameters, creation of a detailed numerical model calibrated with experimental data, and a seismic performance assessment using various analysis methods. As a result, the building collapse mechanisms were determined and critical structural elements identified, which is the basis for future actions directed to the reduction of its risk (e.g., applications of specific measures for a target retrofit, proposal of evacuation routes and safe places inside the building, etc.).

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Collapse risk assessment of a Chilean dual wall-frame reinforced concrete office building

Cited by 13 publications

References 28 publications

Gaussian Process Regression-Based Structural Response Model and Its Application to Regional Damage Assessment

Gaussian Process Regression-Based Structural Response Model and Its Application to Regional Damage Assessment

The Future of Wood Construction: Opportunities and Barriers Based on Surveys in Europe and Chile

Seismic Performance Assessment of an Existing RC Wall Building with Irregular Geometry: A Case-Study of a Hospital in Croatia

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