作者：
Yi Jiang;Yan Ma;Shuo Li;Guangyuan Zhao;Xiaoming He
期刊：
,2014年:206 - 222
作者机构：
[Yi Jiang; Yan Ma; Guangyuan Zhao] Department of Building Construction Management, Purdue University, West Lafayette, IN 47907, USA. E-mail:;[Xiaoming He] School of Civil Engineering and Architecture, Wuhan Polytechnic University, 68 Xuefu South Road, Changqing Garden, Wuhan 430023, Hubei, China. E-mail:;[Shuo Li] Office of Research and Development, Indiana Department of Transportation, West Lafayette, IN 47906, USA. E-mail:
会议时间：
5/25/14 12:00 AM
会议论文集名称：
Challenges and Advances in Sustainable Transportation Systems<&wdkj&>Challenges and Advances in Sustainable Transportation Systems<&wdkj&>Challenges and Advances in Sustainable Transportation Systems
摘要：
For various reasons, it may be necessary to design a section of highway with substandard values for some elements. Such design exceptions require appropriate assessment and justification of the potential impacts to highway safety and operations. It is necessary to conduct economic analyses for proposed design exception projects to compare with the standard designed projects. An economic analysis method was developed to conduct benefit-cost evaluations for design exception highway projects. The method considers life-cycle-costs as well as life-cycle-benefits resulting from a proposed built project in terms of monetary values. Agency costs are estimated by engineers or designers based on past experience, bid prices, design specifications, materials costs, and other information. Travel time and delay costs are usually valued as a percentage of average personal wages. Accident or crash costs are the monetary values for fatalities and injuries associated with crashes. The vehicle operating costs are attributed to the changes in highway speeds, traffic congestion, pavement surface, and other conditions that affect vehicle fuel consumption and wear and tear. With this analysis method, engineers will be able to conduct benefit-cost analysis efficiently and accurately for design exception projects.
作者机构：
[Xiaoming HE] School of Civil Engineering and Architecture, Wuhan Polytechnic University, P.O. Box430023, Wuhan, Hubei.E-mail:;[Jinyong LV] School of Civil Engineering and Architecture, Wuhan Polytechnic University, P.O. Box 430023, Wuhan, Hubei.E-mail:
会议名称：
ICCTP 2010
会议时间：
2010-08-04
会议地点：
Beijing(CN)
会议论文集名称：
10th international conference of Chinese transportation professionals 2010. vol. 5
摘要：
Fatigue cracking of asphalt mixtures is the main damage phenomena for asphalt pavement, which seriously affects the pavement performance. The main influencing factors of fatigue cracking are material properties and load condition. Sisal fiber is a new road material; fracture mechanics theory and finite element method are used to detect whether sisal fiber will enhance fatigue cracking stability of asphalt mixtures. The moving uniformly distributed load is used to simulate vehicle loadings. Gradation of the mixture is AC-13, adjusted synthesis in each group as follows: basalt 1#: basalt 2#: basalt 3# : basalt 4#: slag = 20%: 32%: 12%: 35%: 1%, dosage of sisal fiber is 0.2%. ABAQUS finite element software and singular element are utilized to build the sisal fiber asphalt mixture model with cracks, as well as the common asphalt mixture. The calculated results showed that stress intensity factors of cracks for sisal fiber are reduced. The main reason is due to sisal fiber improving the modulus of asphalt mixtures. Therefore, sisal fiber can improve performance by increasing resistance to fatigue cracking.
