胡家屯中桥路桥过渡段动力特性试验研究

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (6) : 184-188.

论文

胡家屯中桥路桥过渡段动力特性试验研究

陈果元1; 魏丽敏2; 杨果林2

作者信息 +

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

Author information +

文章历史 +

摘要

通过对秦沈铁路客运专线胡家屯中桥路桥过渡段进行动力响应现场测试和沉降观测，分析了级配碎石路桥过渡段的沉降规律；动应力、振动加速度、动位移与列车速度的关系，以及动力响应沿路基深度的衰减规律和沿线路纵向变化规律。结果表明：级配碎石过渡段能减缓路桥间沉降差；随着列车速度的提高，列车对路基的动应力作用增强，且动应力影响在基床表层较为显著；不同行车速度下，各测点振动加速度值变化不大，其分布范围一般集中在1m/s2~3.5 m/s2之间；各测点动位移受列车速度的影响不明显，其值集中在0.1mm~0.35mm范围内变化。

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.

导出引用

陈果元;魏丽敏;杨果林. 胡家屯中桥路桥过渡段动力特性试验研究[J]. 振动与冲击, 2010, 29(6): 184-188

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