An Experimental Research on Dynamic Properties of Road-bridge Transition Section of the Hujiatun Medium Bridge

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Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (6) : 184-188.

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An Experimental Research on Dynamic Properties of Road-bridge Transition Section of the Hujiatun Medium Bridge

CHEN Guo-yuan1; WEI Li-min2; YANG Guo-lin2

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Abstract

On basis of the in-situ test of dynamic response and sedimentation observation of the road-bridge transition section of the Hujiatun Medium Bridge in Qinhuangdao Shenyang Special Passenger Line, the sedimentation rule of the road-bridge transition section with graded broken stone is analyzed. Researches are made in terms of the relationship between the dynamic stress, vibration acceleration, the dynamic displacement and the train velocity, and the depthwise attenuation law of the subgrade and the longitudinal change regularity alone the line in connection with the dynamic stress. Results show that the road-bridge transition section with graded broken stone can reduce the differential settlement; the train’s dynamic stress upon the bedding goes up with the increase of the train velocity, and the dynamic stress features significantly on the bedding face; the accelerations at measuring points are not significantly affected by the train velocity, ranging from 1m/s2 to 3.5 m/s2; the dynamic displacement are not significantly affected by the train velocity, whose value intensively ranges from 0.1mm~0.35mm.

Key words

road-bridge transition section / graded broken stone / train running speed / dynamic response / differential settlement

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CHEN Guo-yuan;WEI Li-min;YANG Guo-lin. An Experimental Research on Dynamic Properties of Road-bridge Transition Section of the Hujiatun Medium Bridge[J]. Journal of Vibration and Shock, 2010, 29(6): 184-188