Nonlinear modeling of a damaged reinforced concrete building and design improvement behavior

Autor: Leonardo M. Massone, Eduardo Bedecarratz, Mario Lafontaine, Fabian Rojas
Rok vydání: 2021
Předmět:
Zdroj: Journal of Building Engineering. 41:102766
ISSN: 2352-7102
DOI: 10.1016/j.jobe.2021.102766
Popis: Nonlinear modeling is performed for a reinforced concrete building that presented flexural damage during the 2010 Chile earthquake. The focus of the analysis is the behavior of a wall on the first floor that presented localized damage; the wall is T-shaped, has a web length of 8 m, and a flange length reaching 18 m. An unconfined concrete model and a steel model incorporating buckling were considered, accounting for the poor detailing of the wall boundary element. The walls were modeled using nonlinear fiber elements . A rigid diaphragm was considered, and the slabs were incorporated only in areas where they could generate coupling effects in the walls, being modeled as beams with plastic hinges at their ends. Nonlinear static and dynamic analyses were performed on the building model , utilizing records for Santiago from the 2010 Mw 8.8 earthquake. For relatively low lateral drift values (~0.003), the strain levels observed in the model for the wall suffering damage would lead to flexural damage due to its large size, large amount of longitudinal steel reinforcement in the flange, and poor detailing of the web boundary. Several other nonlinear models were created to compare the impact of the design improvements on the overall performance of the building. From the results, it can be seen that the observed damage would be avoided by implementing design solutions such as increased wall thickness, confinement, or decoupling of the main wall.
Databáze: OpenAIRE
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