Interlaminar shear behavior of bridge deck pavement interlayer structure(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2019年01期
- Page:
- 1-8
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Interlaminar shear behavior of bridge deck pavement interlayer structure
- Author(s):
- -
- WAN Chenguang, SHEN Aiqin, GUO Yinchuan, LIPeng
- Keywords:
- road engineering; bridge deck pavement; interlayer structure; mechanical analysis; shear strength; interlaminar shear behavior
- PACS:
- -
- DOI:
- -
- Abstract:
- In view of the problems associated with concrete bridge deck pavement structures, the most unfavorable shear position of the interlayer layer structure was determined, by combining theoretical calculations and laboratory testing methods. Based on the special linear relationship between the interlaminar shear stress and the compressive stress of nodes of the most unfavorable position, an interlayer shear evaluation index was proposed. A sensitivity analysis of the key influencing factors of most unfavorable shear position of the interlayer layer was also conducted. The relationship between the shear strength regression equation of the composite structure with vertical pressure condition was established, and the shear behavior of the bridge deck pavement was analyzed.The results show that the most unfavorable shear position of the interlayer structures is the front boundary line of the loading area, which along the traveling direction under the action of uniformly distributed rectangular and double loads. The shear state of the interlayer structure rapidly deteriorates with an increase in the load lateral force coefficient. For interlayer structure 1, the slope of the fitted equation is 0.6930 when the horizontal force coefficient is 0.5, is an increase of 103%, as compare to when the horizontal force coefficient is 0, this is a very significant increase. When the pressure of a braking vehicle is more than 1.2 MPa, the interlayer structure with emulsified asphalt as an adhesive layer may be subjected to onetime shear failure. The blasting interface structure does not appear in onetime shear failure due to overloading, whereas for interlayer structure 2 with the original interface, the critical failure state occurs when the pressure is 0.85 MPa. For a bridge deck pavement under heavy traffic, the surface treatment measures of using an SBSmodified asphalt adhesive layer and a shot blasting leveling layer should be adopted. 5 tabs, 7 figs, 25 refs.
Last Update: 2019-01-28