Abstract
In order to extend the service life of the steel bridge deck pavement, a long‐life steel bridge deck pavement (LLSBDP) was put forward referring to the concept of long‐life asphalt pavement. First, the requirements of the LLSBDP were given, based on which, an LLSBDP structure “EAC + SMA” was proposed. Second, a numerical analysis was performed to evaluate the stress status of the “EAC + SMA” structure. Third, an experimental study was conducted to assess the performance of the pavement material and the pavement structure. Meanwhile, for comparison, the performances of traditional steel bridge deck pavement structure “EAC + EAC” were also studied in the numerical and experimental program. The results showed that, with periodical rehabilitation or reconstruction of the SMA surface layer, the EAC base layer can last for a long life without structural distresses. The proposed structure can meet the requirements of LLSBDP and can be used to extend the service life of the steel bridge deck pavement.
Highlights
Steel bridge deck pavement (SBDP) is an important layer paved on steel bridges and used to protect the steel bridge deck as well as providing service to the vehicle [1]. e design life of the SBDP is usually around 15 years, while the design life of the steel bridges is 100–120 years
Referring to the concept of LLAP, this paper puts forward the requirements of the long-life steel bridge deck pavement (LLSBDP). e “epoxy asphalt concrete (EAC) + SMA” was proposed for LLSBDP; a numerical analysis and an experimental program were conducted to evaluate the performance of the proposed structure. e conclusions were drawn as follows
According to the requirements of LLSBDP, the lower layer should have a larger cracking resistance than the upper layer. e indirect tensile test results showed that the cracking resistance of EAC is remarkably greater than SMA, implying that the cracking in the SMA layer is hard to develop to the EAC layer. is was improved from the composite structure test
Summary
Steel bridge deck pavement (SBDP) is an important layer paved on steel bridges and used to protect the steel bridge deck as well as providing service to the vehicle [1]. e design life of the SBDP is usually around 15 years, while the design life of the steel bridges is 100–120 years. E longlife pavement is a pavement that can last at least more than 40 years without major structural strengthening [10], and it has been used across the world, especially in Europe and the United States [11,12,13] According to this concept, this paper proposes a long-life steel bridge deck pavement (LLSBDP) and presents a performance evaluation program for the proposed pavement. To reduce the risk of the through cracking, it is better to decrease the tensile stress on the top of the pavement surface and select a stronger lower layer material. In this case, based on the basic idea of long-. A numerical analysis and an experimental program will be conducted below to evaluate the feasibility of this proposed LLSBDP structure
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