[1]郑元勋,孔 孟,王博立,等.桥梁预拱度对行车舒适性的影响及桥面线形调整[J].郑州大学学报(工学版),2024,45(02):106-113.[doi:10.13705/j.issn.1671-6833.2023.05.001]
　ZHENG Yuanxun,KONG Meng,WANG Boli,et al.Influence of Bridge Pre-camber on Traffic Comfort and Adjustment of Bridge Deck Alignment[J].Journal of Zhengzhou University (Engineering Science),2024,45(02):106-113.[doi:10.13705/j.issn.1671-6833.2023.05.001]
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桥梁预拱度对行车舒适性的影响及桥面线形调整()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
45
期数:
2024年02期
页码:
106-113
栏目:
出版日期:
2024-03-06

文章信息/Info

Title:
Influence of Bridge Pre-camber on Traffic Comfort and Adjustment of Bridge Deck Alignment
作者:
郑元勋;  孔 孟;  王博立;  王长柱;  陈 静
1. 郑州大学 黄河实验室,河南 郑州 450001;2. 郑州大学 水利与交通学院,河南 郑州 450001;3. 中交第三公路工 程局有限公司,北京 100304;4. 中国建筑第七工程局有限公司,河南 郑州 450004
Author(s):
ZHENG Yuanxun;  KONG Meng;  WANG Boli;  WANG Changzhu;  CHEN Jing
1. Yellow River Laboratory, Zhengzhou University, Zhengzhou 450001, China; 2. School of Water Conservancy and Transportation Zhengzhou University, Zhengzhou 450001, China; 3. CCCC Third Highway Engineering Co. , Ltd. , Beijing 100304, China; 4. China Construction Seventh Engineering Division Co. , Ltd. , Zhengzhou 450004, China
关键词:
连续刚构桥;  行车舒适性;  仿真分析;  桥梁预拱度;  余弦曲线分配法;  桥面线形;  白噪声
Keywords:
continuous rigid frame bridge;  traffic comfort;  simulation analysis;  bridge pre-camber;  cosine line dis; tribution method;  bridge deck alignment;  white noise
DOI:
10.13705/j.issn.1671-6833.2023.05.001
文献标志码:
A
摘要:
为研究成桥预拱度对连续刚构桥行车舒适性的影响,以多座主跨跨径为 110 ~ 200 m 的连续刚构桥为研究 对象,首先,采用滤波白噪声法建立桥面时域模型,并与按余弦曲线设置的成桥线形叠加模拟成桥后的桥面不平 度;其次,采用 MATLAB / Simlink 搭建车辆-桥面系统模型,以加速度均方根值( RMS) 作为桥梁边跨、中跨桥面的行 车舒适性评价指标,以最大瞬态振动值(MTVV)作为边跨峰值处短时内的行车舒适性评价指标;最后,分析采取经 验法按照余弦曲线设置成桥预拱度的桥梁其跨径和设计时速对边、中跨 RMS 值的影响,以及成桥预拱度取值对边 跨 3L / 8 处 MTVV 值的影响。 研究结果表明:在边跨、中跨处 RMS 值均小于 0. 315 m / s 2 ,说明采取经验法按照余弦 曲线设置成桥预拱度并不影响中跨处的行车舒适性;在边跨 3L / 8 处 MTVV 值在短时内存在大于 0. 345 m / s 2 的情 况,说明在边跨峰值处短时内会产生一定不舒适感。 提出了一种基于桥面铺装层施工优化边跨 3L / 8 处和边墩墩 顶桥面线形的方法,改善了边跨的行车舒适性。
Abstract:
In order to study the effect of bridge pre-camber on the comfort of continuous rigid bridge, a number of continuous rigid bridges with main span diameters between 110 m and 200 m were used as research objects. Firstly, the time domain model of the pavement was established using the filtered white noise method, and the levelness of the new bridge deck was simulated by superimposing it with the formed bridge alignment set according to the cosine curve. Secondly, MATLAB / Simlink was used to build the vehicle-road system model. The root means square (RMS) acceleration value was used to evaluate the traffic comfort of the bridge side span and middle span deck. The maximum transient vibration value (MTVV) was used as the evaluation index of the driving comfort in the short time at the peak of the side span. Finally, the influence of the span diameter and design speed on the RMS value of the side and middle spans of the bridge with the empirical method of setting the pre-arch according to the cosine curve was analyzed. The influence of the pre-arch value on the MTVV value at 3L / 8 of the side span were analyzed. The results showed that the RMS values were less than 0. 315 m / s 2 at the side span and mid-span, indicating that the empirical method of setting the pre-arch of the bridge according to the cosine curve did not affect the traffic comfort at the mid-span. The MTVV value at the side span 3L / 8 was greater than 0. 345 m / s 2 in a short period of time, which mean that the peak of the side span was slightly uncomfortable in a short period of time. In order to improve the traffic comfort within the side span, measures were proposed to optimize the bridge deck alignment at 3L / 8 and the top of the side pier based on the leveling layer construction.

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更新日期/Last Update: 2024-03-08