Interlaminar working state of bridge deck pavement in cold region
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2018年04期
- Page:
- 39-47
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Interlaminar working state of bridge deck pavement in cold region
- Author(s):
- HOU Gui; WANG Xuancang; ZHAO Lun; WAGN Wenqiang; HOU Ping
- (1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. Inner Mongolia TrafficConstruction Engineering Quality Supervision Bureau, Hohhot 010020, Inner Mongolia, China;3. Foshan Road and Bridge Construction Co. Ltd., Foshan 528000, Guangdong, China;4. Construction and Management Office of Ulanchap Airport Expressway,Ulanchap 012001, Inner Mongolia, China)
- Keywords:
- road engineering; interlayer state; bridge deck pavement; mechanical response ; working condition classification; asphalt concrete
- PACS:
- -
- DOI:
- -
- Abstract:
- The purpose of this work was to study the complex interlaminar stress state under the coupling of traffic load and temperature stress in the bridge deck pavement structure in cold areas. The response of interlayer forces and various factors were explored, and the influence of different working conditions on the mechanical response between layers were quantitatively calculated. Finally, based on the operating conditions under the bridge deck pavement, the deck design, construction, and testing purposes were examined. A mechanical analysis model was built for a typical bridge deck pavement structure in northern cold regions. The finiteelement software BISAR3.0 was used to analyze the distribution characteristics of shear stress between the bridge deck pavement layers. The factors influencing interlaminar shear stress, such as the thickness, modulus of the bridge deck, bridge longitudinal radius, radius of the circular curve of bridge, air temperature, and overloading were examined. The most unfavorable load position was used as the calculated point, and the mechanical behaviors of the pavement with different working conditions were analyzed. The analytic hierarchy process coefficient of the variation method, combined with subjective and objective weighting methods, was used for a comprehensive evaluation of the influence of different working conditions on the shear stress between decks. Evaluation index I was applied to the bridge decks, and the working conditions were established based on the work environment. Under the bridge deck combination of working condition grading standards, the working status between layers was evaluated. The results show that the bridge deck pavement and bridge deck are under significant stress, and the most unfavorable load position of the bridge deck pavement of the mechanical calculation model is located at 1.0δ, 1.5δ, and 0.11 m, where δ is the tire equivalent radius. The influence of the six conditions on the interlayer is significant. The temperature has the greatest influence on the interlaminar shear stress, accounting for approximately 36.56% of the total influence on the interlaminar shear stress. The influence of the pavement modulus is the smallest, only 5.53%. The classification of combined conditions is divided into three levels. Evaluation index I at 0 to 50 is divided into level 1, representing a poor combination of conditions between layers, with an interlaminar shear stress representative value of 0.26 MPa. Evaluation index I is 80 to 100, at level 3, and the representative interlayer combination condition is good. 6 tabs, 11 figs, 21 refs.
Last Update: 2018-08-03