Influence of Bridge Pre-camber on Traffic Comfort and Adjustment of Bridge Deck Alignment

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Influence of Bridge Pre-camber on Traffic Comfort and Adjustment of Bridge Deck Alignment

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[1]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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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 45 Number of periods: 2024 02 Page number: 106-113 Column: Public date: 2024-03-06

Title:: Influence of Bridge Pre-camber on Traffic Comfort and Adjustment of Bridge Deck Alignment

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

Keywords:: continuous rigid frame bridge; traffic comfort; simulation analysis; bridge pre-camber; cosine line dis; tribution method; bridge deck alignment; white noise

CLC:: -

DOI:: 10.13705/j.issn.1671-6833.2023.05.001

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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Last Update: 2024-03-08