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Structural Engineering and Mechanics Volume 76, Number 1, October10 2020 , pages 57-65 DOI: https://doi.org/10.12989/sem.2020.76.1.057 |
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Resilient structures in the seismic retrofitting of RC frames: A case study |
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Francisco J. Pallarés, David Domínguez and Luis Pallarés
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| Abstract | ||
| It is very important to allocate valuable resources efficiently when reconstructing buildings after earthquake damage. This paper proposes the use of a simple seismic retrofitting system to make buildings more resilient than the stiffer systems such as the shear walls implemented in Chile after the earthquake in 2010. The proposal is based on the use of steel chevron-type braces in RC buildings as a dual system to improve the seismic performance of multistory buildings. A case study was carried out to compare the proposal with the shear wall solution for the typical seismic Chilean RC building from the structural and economic perspectives. The results show that it is more resilient than other stiffer seismic solutions, such as shear walls, reduces the demand, minimizes seismic damage, gives reliable earthquake protection and facilitates future upgrades and repairs while achieving the level of immediate occupancy without the costs of the shear walls system. | ||
| Key Words | ||
| Chevron-type steel bracing; Shear walls; Earthquake reconstruction; Resilient seismic structure; Seismic performance; Performance based design | ||
| Address | ||
| Francisco J. Pallarés and Luis Pallarés: ICITECH, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain David Domínguez: University of Talca, Faculty of Engineering, Department of Construction Engineering and Management, Talca, Chile | ||