Refined Study on Longitudinal Seismic Pounding Responses of Simply-Supported Skewed Girder Bridge

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (8) : 194-200.

WANG Jun-wen1,2, WU Tian-yu1,2, LI Shao-hua1,2，LI Jian-zhong3

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Abstract

For refined study the seismic pounding responses of the simply-supported skewed girder bridge(SSGB), firstly, based on the Hertzdamp pounding theory, a refined calculation model considering the friction effect during the collision for SSGB was built by open source seismic software OpenSees; then the reliability of the model was verified from the level of dynamic characteristic and the dynamic response; finally, the 3D refined calculation model was used to analyze the influence of the skew degree and friction effect to the longitudinal seismic pounding responses of SSGB. The results indicate that the position that produce the maximum impact force between deck and abutment changes with the change of the skew degree; not only the skew degree, but also the friction coefficient can influence the maximum impact force; the friction between deck and abutment weakens the influence of the skew degree to the largest longitudinal displacement in acute position of deck’s ends, reducing the peak rotation angle of deck significantly, making the maximum value of the peak rotation angle appear in the bigger skew degree; the largest longitudinal displacement in deck’s ends will be overestimated without considering the friction effect.

Key words

simply-supported girder / skewed bridge / pounding response / friction / skew degree

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WANG Jun-wen1,2, WU Tian-yu1,2, LI Shao-hua1,2，LI Jian-zhong3. Refined Study on Longitudinal Seismic Pounding Responses of Simply-Supported Skewed Girder Bridge[J]. Journal of Vibration and Shock, 2016, 35(8): 194-200

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