Application of Buckling Restrained Braces for Seismic Strengthening of Irregular Gravity Load Designed Reinforced Concrete Frame Buildings
Keywords:Irregular GLD RC frame buildings, seismic strengthening, buckling restrained braces.
AbstractPast earthquake disasters have shown that irregular gravity load designed (GLD) reinforced concrete (RC) frame buildings were very vulnerable to strong ground shaking. Many of them collapsed and caused loss of human lives as well as materials. Hence, in order to prevent future disasters, this type of buildings needs to be strengthened against earthquake. This paper presents a case study of an innovative approach for seismic strengthening of a typical six story residential building with a soft/weak first story using buckling restrained braces (BRBs). The seismic performance of the original GLD building and the retrofitted one are compared using three dimensional nonlinear dynamic time history analysis in OpenSees. The analysis results show that the innovative seismic strengthening approach for irregular GLD RC frame buildings using BRBs can significantly reduce maximum story drifts as well as building damages which benefits in reducing the risk of building’s collapse during earthquake.
Huang, Y., Wada, A., Iwata, M., Mahin, S. A. and Connor, J. J., Design of Damage-Controlled Structures, In Oliveto, G., Innovative Approaches to Earthquake Engineering, WIT Press, Ashurst, U.K., 2001, pp. 85-118.
Brown, A. P., Aiken, I. D., and Jafarzadeh, F. J., Buckling Restrained Braces Provide the Key to the Seismic Retrofit of the Wallace F. Bennett Federal Building, Modern Steel Construction, August, 2001.
Mazzolani, F. M., et al., Seismic Upgrading of RC Buildings by Advanced Techniques - The ILVA-IDEM Research Project, Polimetrica Publisher, Italy, 2006.
Yooprasertchai, E., Seismic Retrofitting of Low-Rise Nonductile Reinforced Concrete Buildings by Buckling Restrained Braces (Master thesis No ST-07-04), Asian Institute of Technology, Bangkok, 2007.
Suthasit, M., Nonlinear Modeling of Gravity Load Designed Reinforced Concrete Buildings for Seismic Performance Evaluation (Master thesis No ST-07-06), Asian Institute of Technology, Bangkok, 2007.
Suthasit, M. and Warnitchai, P., Modeling of Gravity Load Designed RC Frame Buildings for Nonlinear Dynamic Analysis, The 14th World Conference on Earthquake Engineering, Beijing, China, 2008.
Chandra, J., Seismic Retrofitting of Mid Rise Reinforced Concrete Frame Buildings with a Soft/Weak First Story Using Buckling Restrained Braces (Master thesis No ST-09-06), Asian Institute of Technology, Bangkok, 2009.
Rayamajhi, D., Effects of Plan-Eccentric Infill Walls Configuration on 3D Nonlinear Response of Reinforced Concrete Frame Building (Master thesis No ST-09-04), Asian Institute of Technology, Bangkok, 2009.
American Society of Civil Engineers (ASCE), Prestandard and Commentary for the Seismic Rehabilitation of Buildings (FEMA-356), Federal Emergency Management Agency, Virginia, 2000.
Mazzoni, S., McKenna, F., Scott, M. H., Fenves, G. L., et al., Open System for Earthquake Engineering Simulation (OpenSees), Pacific Earthquake Engineering Research Center, University of California, Berkeley, 2000.
International Conference of Building Officials (ICBO), Uniform Building Code, Volume 2, International Conference of Building Officials, California, 1997.
Shome, N., Cornell. A., Bazzurro. P., and Carballo, J.E., Earthquakes, Records, and Nonlinear Responses, Earthquake Spectra, 14(3), 1998, pp. 469-500.[CrossRef]
Stewart, J. P., Liu, A. H., Choi, Y. and Baturay, M. B., Amplification Factors for Spectral Acceleration in Active Regions (PEER Report 2001/10), Pacific Earthquake Engineering Research Center, University of California, Berkeley, 2001.
American Institute of Steel Construction (AISC), Seismic Provisions for Structural Steel Buildings (ANSI/AISC 341-05), American Institute of Steel Construction, Inc., Chicago, Illinois, 2005.
How to Cite
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain the copyright and publishing right, and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) followingthe publication of the article, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).