Study on Local Response Characteristics of RC Beams under Impact Loading

ZHAO Bushao, QIAN Jiang

Abstract

Based on the existing experimental results, the dynamic response of RC beams under impact loading is divided into local response stage and overall response stage. As RC beams are vulnerable to shear failure during the local response stage, this study investigates the transient response of the components in this stage. Thus, the effect of inertial force and reverse reaction on the internal force distribution at the local response stage is also discussed. Based on the basic principles of force equilibrium and parametric analysis results, a computing method for the internal force of RC beams is proposed. The results show that both the inertial force and negative reverse reaction affect the internal force distribution of beams during the local response stage, and the reverse reaction is approximately linear to the span-depth ratio and peak impact force. The assumption that the distribution of inertial force is linear can well reflect the actual force state of the beam.

 

Keywords:  RC beams,  impact loading,  transient response,  inertia force,  reverse reaction,  internal force analysis


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XU X J, SHAN C L. Impact analysis of the bridge pier anti–colli–sion floating box sets made by sandwich structure with curved – shaped [J]. Journal of Hunan University (Natrural Sciences), 2015,42 (3):106—111. (In Chinese)

WANG J, QIAN J, ZHOU D Y. Numerical simulation of urban bridge substructures impacted by heavy vehicles [J]. Journal of Hunan University (Natrual Sciences), 2016, 43 (7):88—95. (In Chinese)

HUGHES G, BEEBY A. Investigation of the effect of impact loading on concrete beams [J]. Structural Engineer, 1982, 60 (3):45— 52.

DISHI N, MIDAMI H, MATSUODA D G, et al. Impact behavior of shear–failure–type RC beams without shear rebar [J]. International Journal of Impact Engineering, 2002, 27 (9): 955—968.

SAATCI S, VECCHIO F J. Effects of shear mechanisms on impact behavior of reinforced concrete beams[J]. ACI Structural Journal, 2009, 106(1): 78—86.

FUJIDADE D, LI B, SOEUN S. Impact response of reinforced concrete beam and its analytical evaluation [J]. Journal of Structural Engineering, 2009, 135 (8): 938—950.

XU B, ZENG X. Experimental study on the behaviours of reinforced concrete beams under impact loading [J]. China Civil Engineering Journal, 2014, 47(2): 41—51.(In Chinese)

BANG M Y, BANG D R, SONG C M. A calculation method of reinforced concrete beam under low velocity impact [J]. Acta Armamentarii, 2006, 27 (3): 399—405. (In Chinese)

LIU F, LUO Q Z, JIANG Z G. Dynamic response and failure mechanism of RC beams to low velocity impact [J]. Engineering Mechanics, 2015, 32(5): 155—161.(In Chinese)

DISHI N, MIDAMI H. Empirical formulas for designing reinforced concrete beams under impact loading [J]. ACI Structural Journal, 2012, 109(4): 509—519.

ZHAO D B,YI W J. Anti–impact behavior and design method for RC beams [J]. Journal of Vibration and Shock, 2015, 34(11): 139—145.(In Chinese)

JONES N. Structural impact [M]. New York: Cambridge University Press, 2011 :61—75.


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