Numerical Study of the Seismic Response of a Mid-Rise RC Building Damaged by 2009 Tucacas Earthquake
In this Chapter are presented the results of the numerical evaluation of the seismic response of an eight-levels RC framed building who suffered light damage by the 2009 Tucacas Earthquake (6.4 Mw). The building was designed according the current Venezuelan codes, splitting the structure in three different modules in order to avoid the negative effects of in plan irregularities and represents a typical mid-rise building located on high seismic-prone areas. Each module was modelled and analyzed independently using non-linear standard techniques (pushover analysis and incremental dynamic analysis). The seismic action was defined by a set of synthetic design-spectrum compatible accelerograms. In order to improve the original seismic design of the building, a new building was proposed using an innovative energy-based procedure. The set of dynamic analyses was used in order to formulate a new procedure for the determination of fragility curves. Results show that the new procedure is suitable in order to predict the damage state which the building may reach when it is subjected to a strong earthquake. This seismic event leads to evaluate the current design and construction practices in order to ensure the life of the population and to reduce the seismic vulnerability of less developed countries.
KeywordsPeak Ground Acceleration Seismic Response Fragility Curve Incremental Dynamic Analysis Inelastic Displacement
The authors are especially grateful to the Research Council (CDCHT) of Lisandro Alvarado University. the first author also wishes to thank to Prometeo Program, under whose auspices this chapter has been written. We also express our gratitude to the Mid-American Earthquake Center and the National Science Foundation (award number EEC-9701785), the developers of Zeus NL software used in this research. Finally, we thank to Eng. Angel Delgado, for supplying the technical documents of the original building, which he designed and supervised.
- FONDONORMA: Norma venezolana Covenin 1756-1:2001. Edificaciones sismorresistentes, Parte 1. Fondonorma, Caracas, Venezuela (2001).Google Scholar
- FONDONORMA: Norma venezolana Fondonorma 1753:2006, Proyecto y construcción de obras en concreto estructural. Fondonorma, Caracas, Venezuela (2006).Google Scholar
- Pinto, P. E., Giannini, R., & Franchin, P. (2006). Seismic reliability analysis of structures. Pavia, Italy: IUSS Press.Google Scholar
- Vielma, J. C. (2009). PACED: Program for the generation of spectrum compatible accelerograms. Venezuela: Lisandro Alvarado University. Barquisimeto.Google Scholar
- Vielma, J. C., Barbat, A. H., & Oller, S. (2010). Non linear structural analysis. Application to evaluating the seismic safety. In M. Camilleri (Ed.), Structural analysis (pp. 50–74). New York: Nova Science Publishers.Google Scholar
- Vielma, J. C., Barbat, A. H., & Oller, S. (2011a). Dimensionado sísmico de edificios de hormigón armado mediante factores de amplificación de desplazamientos con base en el balance de energía. Hormigón y acero, 63, 83–96.Google Scholar
- Vielma, J. C., Barbat, A. H., & Oller, S. (2011b). Seismic safety of RC framed buildings designed according modern codes. Journal of Civil Engineering and Architecture, 5, 567–575.Google Scholar
- Vielma, J. C., Barbat, A. H., & Oller, S. (2012). The quadrants method: A procedure to evaluate the seismic performance of existing buildings. In 15 World Conference on Earthquake Engineering. Lisbon, Portugal.Google Scholar
- ZEUS NL: User manual. Version 1.8.9. Mid America Earthquake Center. Urbana, USA (2010).Google Scholar