Structural optimization of steel bridge deck pavement based on mixture performance and mechanical simulation. (27th February 2023)

• Record Type: Journal Article
• Authors: Sun, Jia; Luo, Sang; Huang, Wei; Hu, Jing; Liu, Shicheng
• Is Part Of: Construction & building materials. Volume 367(2023)
• Publication Date: 2023-02-27
• Subjects: Steel bridge deck pavement -- SMAM+EAM -- Mixture performance -- Finite element analysis -- Structural optimization; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2022.130217
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The performance of SMAM and EAM prepared with different binders was compared. The dynamic modulus master curves of SMAM and EAM were established. The SMAM + EAM structure was optimized using the finite element method. The SMAM + EAM structure has potential for application in steel bridge deck pavement. Abstract: The upper layer of modified SMA mixture (SMAM) and the lower layer of epoxy asphalt mixture (EAM) is a steel bridge deck pavement (SBDP) structure with application potential, but there is a lack of systematic research on it. In this study, the pavement material and structure of SMAM + EAM were optimized using mixture performance tests and finite element analysis, which provided guidance to facilitate its promotion and application. Firstly, the pavement performance and dynamic properties of SMAMs and EAMs prepared with different binders were compared to preferably select the appropriate SBDP material. Secondly, the dynamic modulus master curves of the mixtures were established to provide material parameters for pavement structure design. Finally, the FEA method was applied to comparatively analyze the dynamic mechanical response of the pavement structure for different structures, thickness combinations, and temperatures to optimize the SBDP structure purposefully. The results demonstrated that EAM had better high-temperature rutting resistance than SMAM, while SMAM had superior moisture damage and skid resistance. The modifier contents in the asphalt binder used for SMAM and EAM were recommended to be 12 wt% and 40 wt%, respectively. From the FEA results, the SMAM + EAM structure met the performance requirements of SBDP. Compared with double-layered EAM, the deformation resistance of the SMAM + EAM structure was reduced, but it was beneficial to avoid the occurrence of crack defects and interlayer shear damage. Furthermore, the recommended pavement thickness combination was 4.5 + 3.5 cm.