A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Study on the mechanical performance and interface damage of CRTS II slab track with debonding repairment
Highlights Bilinear CZM based on the stress-displacement relationships of the interfaces was determined. A finite element model of CRTS II slab track incorporating debonding repairment was established. Mechanical performance of the track-slab with debonding repairment was investigated. Initiation and evolution of the damages in the interfaces were studied.
Abstract In this work, the effect of the carrying-out debonding repairment on the mechanical performance and interface damage of China Railway Track System (CRTS) II slab track was studied. The bilinear cohesive zone model (CZM) based on the stress-displacement relationships for describing the interface behaviors of the debonding repaired CRTS II slab track was obtained through the experimental tests. A finite element model (FEM) of the CRTS II slab track incorporating the debonding repairment between the track-slab and the mortar layer was established, which was applied in the simulations under the vertical temperature gradient load. The results show that the temperature deformation of the track-slab could be well restored and no structural damage occurred under the vertical temperature gradient load. The damage only initiates and develops at the edge of the interface between the track-slab and the mortar layer (T-M interface) under the vertical positive temperature gradient. However, the evolutions of the maximum damage variable and the damage area indicate that the influence of the interface damage emerging at the T-M interface is relatively limited.
Study on the mechanical performance and interface damage of CRTS II slab track with debonding repairment
Highlights Bilinear CZM based on the stress-displacement relationships of the interfaces was determined. A finite element model of CRTS II slab track incorporating debonding repairment was established. Mechanical performance of the track-slab with debonding repairment was investigated. Initiation and evolution of the damages in the interfaces were studied.
Abstract In this work, the effect of the carrying-out debonding repairment on the mechanical performance and interface damage of China Railway Track System (CRTS) II slab track was studied. The bilinear cohesive zone model (CZM) based on the stress-displacement relationships for describing the interface behaviors of the debonding repaired CRTS II slab track was obtained through the experimental tests. A finite element model (FEM) of the CRTS II slab track incorporating the debonding repairment between the track-slab and the mortar layer was established, which was applied in the simulations under the vertical temperature gradient load. The results show that the temperature deformation of the track-slab could be well restored and no structural damage occurred under the vertical temperature gradient load. The damage only initiates and develops at the edge of the interface between the track-slab and the mortar layer (T-M interface) under the vertical positive temperature gradient. However, the evolutions of the maximum damage variable and the damage area indicate that the influence of the interface damage emerging at the T-M interface is relatively limited.
Study on the mechanical performance and interface damage of CRTS II slab track with debonding repairment
Xu, Yude (author) / Yan, Daobin (author) / Zhu, Wenjun (author) / Zhou, Yu (author)
2020-05-15
Article (Journal)
Electronic Resource
English