Experimental studies on impact buffer effect of reinforced concrete beams

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (13) : 178-183.

Wang Hui, Zhang Nan, Chen Xu, Wei Xing, Zhang Ling, Zhang Wen-huan

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Abstract

The impact tests of eight reinforced concrete beams were conducted by falling weight impact equipment. The impact dynamic responses of the test specimens with and without buffer were analyzed contrastively. The test results show that the buffer can greatly reduce the impact dynamic responses of specimens. The peak impact force of the beams in bending can be decreased by 70.98%, the peak strain of tensile reinforcement can be decreased by 71.11%; The peak impact force of the beams with shear can be decreased by 76.24%, the peak strain of tensile reinforcement can be decreased by 83.09%, the peak strain of stirrup reinforcement can be decreased by 84.65%. These study results have provided a test reference for the study of efficient anti-collision system. Based on the energy conservation principle and the theorem of momentum, the calculation formula of impact force acting on a simply supported beam was established. The calculated value of the impact force was in good agreement with the test impact force peak, which provides a simple and quick method with test bases for theoretical calculation of impact buffer effect.

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reinforced concrete beam / impact test / buffer effect / impact force

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Wang Hui, Zhang Nan, Chen Xu, Wei Xing, Zhang Ling, Zhang Wen-huan. Experimental studies on impact buffer effect of reinforced concrete beams[J]. Journal of Vibration and Shock, 2017, 36(13): 178-183

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