[1] Liu Yun, Qian Zhendong,. Dynamic analysis of pavement on long span steel bridge decks [J]. Journal of Southeast University (English Edition), 2008, 24 (2): 212-215. [doi:10.3969/j.issn.1003-7985.2008.02.018]
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Dynamic analysis of pavement on long span steel bridge decks(
)
大跨径钢桥面铺装动响应分析
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 24
- Issue:
- 2008 2
- Page:
- 212-215
- Research Field:
- Traffic and Transportation Engineering
- Publishing date:
- 2008-06-03
Info
- Title:
- Dynamic analysis of pavement on long span steel bridge decks
- 大跨径钢桥面铺装动响应分析
- Author(s):
- Liu Yun, Qian Zhendong
- School of Transportation, Southeast University, Nanjing 210096, China
- PACS:
- U443.33
- DOI:
- 10.3969/j.issn.1003-7985.2008.02.018
- Abstract:
- In order to analyze the dynamic response of pavement on long-span steel bridge decks under random dynamic loads, the irregularities of the pavement surface is simulated with the power spectrum density function, and the random load is calculated according to a vehicle vibration equation of vehicle model.The mechanical responses of three different cases are compared by using a transient dynamic analysis method, i.e., under random dynamic load, constant moving load and dead load respectively.The results indicate that the mid-span of two adjacent transversal diaphragms is the worst load position.The maximum vertical displacement and the maximum transversal tensile stress of the pavement are 1.33 times and 1.39 times as much as those when only considering the impact coefficients.This study not only provides a theoretical basis for the mixture design and structural design of pavement, but also puts forward higher demand on the construction and maintenance for steel deck pavement.
- 为了研究车辆随机荷载作用下的大跨径钢桥面铺装层动响应, 首先根据目前钢桥面铺装的平整度现状, 利用功率谱密度函数模拟桥面不平度;然后选取单轮车辆模型计算由桥面不平度引起的行驶车辆随机动荷载;最后采用瞬态动力分析方法计算了铺装层的竖向位移及最大横向拉应力等主要力学响应, 并与以往的移动恒载作用下铺装层的动响应及静力计算结果做了比较.分析表明, 针对铺装层而言, 相邻的2块横隔板的跨中位置为最不利荷载位置;考虑桥面不平度情况下铺装层的最大竖向位移和最大横向拉应力的峰值分别是只考虑冲击系数的移动恒载作用下的1.33 倍和1.39 倍.研究结果为铺装层的混合料和结构设计提供了理论依据, 对桥面施工及维护提出了严格要求.
References:
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Memo
- Memo:
-
Biographies: Liu Yun(1981—), male, graduate;Qian Zhendong(corresponding author), female, doctor, professor, qianzd@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.50578038), the Ph.D.Programs Foundation of Ministry of Education of China(No.20050286008).
Citation: Liu Yun, Qian Zhendong.Dynamic analysis of pavement on long span steel bridge decks[J].Journal of Southeast University(English Edition), 2008, 24(2):212-215.