Experimental and Numerical Studies on the Reinforced Concrete Frames Subjected to Blast Loads

Abstract:

Terrorist bombing attacks will endanger and may even destroy the target building structures, resulting in economic loss and casualties. Typical columns and floor slab systems are not designed to resist the complex blast loading. So, in recent years, the effects of blast on conventional public buildings are focused on. In this paper,a two-bay,one-story reinforced concrete frame structure which is used to model a portion of a typical reinforced concrete frame structural system is used to investigate the blast response. The experiments are conducted on two models, allowing a variation in explosives standoff and explosives charge. In each experiment,the blast pressure values are recorded and the degree of damage of the frames are studied. According to the two kinds of experiments, two numerical models are established. ALE method which considers the interaction of the explosive, the air, and the structure is applied.Structure response analyses are performed using the large deformation finite-element computer code, LS-DYNA. The numerical results are compared with the experiment results, and a good agreement is obtained. The calculating results also demonstrate that some experimental value is unreasonable.

• Periodical: Applied Mechanics and Materials (Volumes 157-158)
• Pages: 1173-1177
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.157-158.1173
• Online since: February 2012
• Authors: Li Xiao, Wen Zhong Qu, Jian Gang Wang
• Keywords: Blast Effect, Dynamic Response, Experiment, Numerical Analysis, Reinforced Concrete Frames

References

[1] Chengqing Wu, Hong Hao. Safe Scaled Distance for Masonry Infilled RC Frame Structures Subjected to Airblast Loads. ASCE. Journal of Performance of Constructed Facilities. Vol. 21(2007), pp.422-431.

DOI: 10.1061/(asce)0887-3828(2007)21:6(422)

[2] Yanchao Shi, Hong Hao, Zhongxian Li. Numerical Simulation of Blast Wave Interaction with Structure Columns . Shock Waves. Vol. 17(2007), pp.113-133.

DOI: 10.1007/s00193-007-0099-5

[3] Eamon, C.D., Baylot, J.T. Modeling Concrete Masonry Walls Subject to Explosive Loads [J]. ASCE: Journal of Engineering Mechanizes. Vol. 130(2004), pp.1098-1106.

DOI: 10.1061/(asce)0733-9399(2004)130:9(1098)

[4] Dennis, S.T., Baylot, and J.T. et al. Response of l/4-Scale Concrete Masonry Unit (CMU) Walls to Blast [J] . ASCE: Journal of Engineering Mechanics. Vol. 128(2002), pp.134-142.

DOI: 10.1061/(asce)0733-9399(2002)128:2(134)

[5] Christopher D. Eamon, Reliability of Concrete Masonry Unit Walls Subjected to Explosive Loads[J]. ASCE: Journal of Structural Engineering. Vol. 133(2007), pp.935-944.

DOI: 10.1061/(asce)0733-9445(2007)133:7(935)

[6] Livermore Software Technology Corporation. LS-DYNA KEYWORD USER'S MANUAL Version970. Livermore Software Technology Corporation(2003).