Influence of friction coefficient of sliding layer on cross-prestressed concrete pavement slab(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2016年04期
- Page:
- 1-8
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Influence of friction coefficient of sliding layer on cross-prestressed concrete pavement slab
- Author(s):
- HAN Sen; QI Xiang; HAN Xiao; CHEN De; ZHANG Dong-sheng; WANG Fei
- (1.School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China; 2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 3. Key Laboratory of High-Speed Railway Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 4. Shaanxi Provincial Communication Construction Group, Xi’an 710075, Shaanxi, China; 5. China Railway Eryuan Engineering Group Co. Ltd., Xi’an 710054, Shaanxi, China)
- Keywords:
- road engineering; cross-prestressed concrete pavement; sliding layer; friction coefficient; finite element
- PACS:
- U441
- DOI:
- -
- Abstract:
- Coefficient of friction (COF) of sliding layer has significant effects on stress and deformation of panel of cross-prestressed concrete pavement (CPCP). Setting a reasonable sliding layer which can meet the requirements of CPCP structure is a key factor for sustainability of CPCP. In this paper, a 1/4 finite element model of CPCP was built to analyze the influence of COF of sliding layer on CPCP structure stress and deformation under wheel load and temperature gradient load. The influences of COF of sliding layer on the expansion stress and expansion amount of the CPCP were studied based on analytic calculation method. The buckling failure of CPCP was also checked. The results show that COF of CPCP sliding layer has negligible effects on stress and deformation in CPCP structure under wheel load. Under temperature gradient load, when COF of sliding layer varies from 0.3 to 1.2, the maximum principal stress in panel of CPCP is less than the flexural stress of cement concrete (i.e. 5 MPa), which cannot generate cracking in panel of CPCP. At the same time, the stress and deformation made by thermal load will not generate cracking in panel of CPCP when COF of sliding layer is under 1.04. The smaller the short-term COF of sliding layer is, the smaller temperature stress will have in panel of CPCP. Meanwhile, the higher the long-term COF of sliding layer is, the smaller expansion the CPCP panels will have. In the end, the critical temperature of buckling failure of CPCP panel is 48.166 ℃. Therefore, panel of CPCP cannot appear any buckling failures under normal environmental temperature difference.
Last Update: 2016-07-28