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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Oshman Charco1, Frank Chavarin1 and Rais Ahmad2
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DOI:10.17265/1934-7359/2024.11.003
1. Thang Le & Associates, Arcadia, CA 91006, USA
2. California State University, Northridge, CA 91330, USA
BRBF (buckling restrained braced frame) is a relatively new lateral force resisting system for building structures. BRBFs are used mostly to resist seismic force due to their high ductility after yielding and the ability to absorb higher strain energy. ASCE (American Society of Civil Engineers) first permits the use of BRBFs as a single seismic force-resisting system by quantifying the seismic parameters such as response modification coefficient (R), over-strength factor (Ωo) and deflection amplification factor (Cd) for a structure built with BRBF, in their 2010 code (ASCE 7-10). But it has not been investigated how a structure built with BRBF, which is primarily designed to resist seismic force, and behaves under sudden occurrence of a blast load. This research investigates the performance of a BRBF subjected to blast loading. In other words, this paper focuses on the effect of blast loading on BRBF. The architype for this investigation is a chevron type braced frame. The frame is subjected to a short duration blast load that lasts only 21.7 mili-second (ms). Blast loading effects on the braced frame are assessed by identifying the weakest plane of failure, deformation characteristics and out of plane bending. The research investigates how the properties of the surrounding concrete, especially compressive strength, affect the overall strength of the BRBF on resisting blast loading. It is observed that the compressive strength of the surrounding concrete plays a significant role in reducing the deformation characteristics, both in-plane and out-of-plane.
BRBF, blast loading, response modification coefficient (R), chevron brace.
Journal of Civil Engineering and Architecture 18 (2024) 530-539 doi: 10.17265/1934-7359/2024.11.003
[1] Robinson, K., and Stocking, A. W. 2013. “Buckling Restrained Braces—An Overview.” Professional Development Advertising Section, Bentley Systems, Incorporated.
[2] Chavarian, F., Charco, O., and Ahmad, R. 2022. “Blast Loading on Chevron Type Buckling Restrained Braced Frames.” In Proceedings of the Fourth European and Mediterranean Structural Engineering and Construction Conference, Leipzig, Germany, June 20-25, 2022. www.doi.org/10.14455/ISEC.2022.9(1).
[3] Fahnestock, L. A., Sause, R., Ricles, J. M., and Lu, L.-W. 2003. “Ductility Demands on Buckling-Restrained Braced Frames under Earthquake Loading.” Earthquake Engineering and Engineering Vibration 2: 255-68.
[4] Yavarian, S., and Ahmad, R. 2016. “Evaluation of Seismic Performance Factors in High Rise Buildings with Dual Lateral Systems Consisting of Buckling Restrained Braced Frames and Intermediate Moment Frames.” Procedia Engineering 161: 680-6.
[5] Ngo, T., Mendis, P., Gupta, A., and Ramsay, J. 2007. “Blast Loading and Blast Effects on Structures—An Overview.” Electronic Journal of Structural Engineering 7: 76-91.
[6] Dusenberry, D. O. 2010. Handbook for Blast-Resistant Design of Buildings. Hoboken, New Jersey: John Wiley & Sons, Inc.
[7] Dragonić, H., and Sigmund, V. 2012. “Blast Loading on Structures.” Tehnički Vjesnik 19 (3): 643-52. https://jcak.hr.
[8] American Society of Civil Engineers. 2011. Blast Protection of Buildings (ASCE/SEI 59-11) (1st ed.). Reston, VA: American Society of Civil Engineers.
[9] Specification for Structural Steel Buildings. 2016. ANSI/AISC 360-16 Specification for Structural Steel Buildings.
[10] Hu, G., Wu, J., and Li, L. 2016. “Advanced Concrete Model in Hydrocode to Simulate Concrete Structures Under Blast Loading.” Hindawi Publishing Corporation 2016: 1-13.
[11] Lee, H-H. 2012. Finite Element Simulations with ANSYS Workbench 14 Theory, Applications: Case Studies. Mission: SDC Publications.