•  
  •  
 

Abstract

To improve the alignment in the old road reconstruction project，stress analysis was carried out，and the alignment and smoothness parameters were used as the major variables in the dynamic equation.A “human-vehicle-road ” dynamic analysis model was established，and alignment comparison groups were set，with only one group set with easing vertical curves.The Newmark- β method was used for programming and calculating the dynamic effects generated by the basic alignment with a radius of 7 000 m.The vibration indicators such as peak acceleration，root mean square of acceleration，vibration period，and frequency were used to analyze the dynamic effects of the basic alignment group.By analyzing the causes and decay rules of the vibration zone，the vibration zone and stable zone within the alignment were defined.The addition of easing vertical curves significantly changed the vibration mode of the vehicle，greatly reducing the peak acceleration and root mean square of acceleration to 5% within the conventional basic alignment and effectively eliminating the perception of vehicle vibration.The influence of vehicle type，vehicle weight，and suspension system parameters on the dynamic effects of the two alignment groups was analyzed.The addition of easing vertical curves greatly reduced the vibration，making the alignment more adaptable to various vehicles.The coupling effect between the alignment groups and different smoothness application states was analyzed.The coupling effect of the conventional basic alignment in the vibration zone was more significant，with the root mean square of acceleration being 95%‒161% that of the straight slope shape.After adding easing vertical curves，the coupling coefficient approached 1，and the alignment was close to the ideal plane of the “human-vehicle-road ” system.Through the above research，it is found that adding easing vertical curves can effectively improve the vehicle running quality of the alignment and enhance its adaptability to vehicles and road conditions.

Publication Date

7-30-2024

DOI

10.14048/j.issn.1671-2579.2024.04.027

First Page

225

Last Page

238

Submission Date

February 2025

Reference

[1]姜正晖 ,陈仁朋 ,陈海君 ,等.公路路基不均匀沉降下的车辆振动分析和路基沉降评价 [J].公路交通科技 (应用技术版 ),2017 ,13(5):78-81.JIANG Zhenghui ,CHEN Renpeng ,CHEN Haijun ,et al .Vehicle vibration analysis and subgrade settlement evaluation under uneven settlement of highway subgrade[J].Journal of Highway and Transportation Research and Development ,2017 ,13(5):78-81.
[2]王杰，贺亚军 .特殊地形条件下某枢纽互通方案研究 [J].中外公路 ，2023 ,43（4） ：303-307.WANG Jie ，HE Yajun .Research on a hub interchange scheme under special terrain conditions [J].Journal of China & Foreign Highway ,2023，43(4):303-307.
[3]付文群 ,马泽欣 ,黎康 .考虑道路线形拟合的高速公路改扩建加铺设计研究 [J].公路 ,2021 ,66(10):97-103.FU Wenqun ,MA Zexin ,LI Kang .Research on overlay design of expressway reconstruction and extension considering road alignment fitting [J].Highway ,2021 ,66(10):97-103.
[4]李开正 .纵断面拟合设计在高速公路加铺改造工程中的应用 [J].交通科技 ,2009 (3):67-69.LI Kaizheng .Application of fitting design of vertical cross section to highway repaving improvem ent project [J].Transpor tation Science & Technology ,2009 (3):67-69.
[5]袁胜强 ,朱银乐 .既有高速公路纵断面线形的拟合技术[J].城市道桥与防洪 ,2009 (6):7-9,11.YUAN Shengqiang ,ZHU Yinle .Fitting technology of existing expressway longitudinal section alignment [J].Urban Roads Bridges & Flood Control ,2009 (6):7-9,11.
[6]胡昌亮，刘冉，王贵山 .不设超高圆曲线路段道路几何设计探讨 [J].中外公路 ，2021 ,41（5） ：1-5.HU Changliang ，LIU Ran ，WANG Guishan .Discussion on road geometric design in circular curve section without superelevation [J].Journal of China & Foreign Highway ,2021，41(5):1-5.
[7]袁胜强 ,徐健 ,朱银乐 .拓建高速公路纵断面设计的两个重要技术问题 [J].上海公路 ,2010 (1):1-2,21,14.YUAN Shengqiang ,XU Jian ,ZHU Yinle .Two key points on profile design of widening highway project [J].Shanghai Highways ,2010 (1):1-2,21,14.
[8]王鹏 ,孔庆伟 ,杜永平 .基于舒适性指标的道路纵断面设计指标研究 [J].上海公路 ,2013 (2):5-8,29,12.WANG Peng ,KONG Qingwei ,DU Yongping .Study of road longitudinal alignment design index based on comfortability index [J].Shanghai Highways ,2013 (2):5-8,29,12.
[9]EASA S M ,HASSAN Y .Design requirements of equal-arc unsymmetrical vertical curves [J].Journal of Transportation Engineering ,1998 ,124(5):404-410.
[10]EASA S .Length requirements for single-arc asymmetrical sag vertical curve for highways [J].Canadian Journal of Civil Engineering ,2010 ,37(6):834-841.
[11]EASA S M ,HASSAN Y .Development of transitioned vertical curve Ⅰ properties [J].Transportation Research Part A:Policy and Practice ,2000 ,34(6):481-496.
[12]EASA S M ,HASSAN Y .Development of transitioned vertical curve Ⅱ sight distance [J].Transportation Research Part A :Policy and Practice ,2000 ,34(7):565-584.
[13]葛婷 ,符锌砂 ,李海峰 ,等.公路空间几何特性对汽车运动影响 [J].同济大学学报 (自然科学版 ),2016 ,44(12):1867 -1872 .GE Ting ,FU Xinsha ,LI Haifeng ,et al .Influence of spatial geometric properties of highway alignments on vehicle kinematics [J].Journal of Tongji University (Natural Science ),2016 ,44(12):1867 -1872 .
[14]周晓青 ,孙立军 ,颜利 .路面平整度评价发展及趋势 [J].公路交通科技 ,2005 ,22(10):18-22.ZHOU Xiaoqing ,SUN Lijun ,YAN Li .Research progress and trend of pavement roughness inidces [J].Journal of Highway and Transportation Research and Development ,2005 ,22(10):18-22.
[15]张洪亮 ,胡长顺 .基于五自由度车辆模型的桥头搭板容许纵坡变化值研究 [J].土木工程学报 ,2005 ,38(6):125-131.ZHANG Hongliang ,HU Changshun .A study on the allowable differential slope of the approach slab with five-degree-freedom vehicle model [J].China Civil Engineering Journal ,2005 ,38(6):125-131.[16]刘国杰 ,陶向华 ,黄晓明 .基于人车路相互作用的路桥接合处差异沉降控制标准 [J].公路交通科技 ,2008 ,25(6):44-49.LIU Guojie ,TAO Xianghua ,HUANG Xiaoming .Differential settlement control criteria of bridge-approach junction based on people-vehicle-road interaction [J].Journal of Highway and Transportation Research and Development ,2008 ,25(6):44-49.
[17]喻凡 .车辆动力学及其控制 [M].北京 :人民交通出版社 ,2004 .YU Fan .Vehicle dynamics and control [M].Beijing :China Communications Press ,2004 .
[18]SEKULIĆ D ,DEDOVIĆ V ,RUSOV S ,et al .Analysis of vibration effects on the comfort of intercity bus users by oscillatory model with ten degrees of freedom [J].Applied Mathematical Modelling ,2013 ,37(18/19):8629 -8644 .
[19]侯之超 ,高江华 ,何乐 .坐姿人体垂向振动特性及其三自由度模型参数 [J].哈尔滨工程大学学报 ,2011 ,32(9):1223 -1227 .HOU Zhichao ,GAO Jianghua ,HE Le .Vertical vibration characteristics of seated human bodies and the parameters of a biodynamic model with three degrees of freedom [J].Journal of Harbin Engineering University ,2011 ,32(9):1223 -1227 .
[20]郑木莲 ,孟建党 ,张世铎 ,等.路桥过渡段上车内人体舒适性评价方法 [J].长安大学学报 (自然科学版 ),2012 ,32(2):1-6.ZHENG Mulian ,MENG Jiandang ,ZHANG Shiduo ,et al .Evaluation method of human comfort in vehicle at transition section between bridge abutment and embankment [J].Journal of Chang ’an University (Natural Science Edition ),2012 ,32(2):1-6.

Download

Share

COinS