A study on crack fatigue propagation of steel deck pavement based on BOTDA

作者：Qian Zhendong^*; Han Guangyi; Huang Wei; Yin Zuchao

来源：China Civil Engineering Journal, 2009, 42(10): 132-136.

• Asphalt concretes
• BOTDA
• Composite beam
• Cracking propagation
• Epoxy asphalt concrete
• Fatigue loads
• Fatigue resistant
• Pavement cracking
• Propagation models
• Propagation pattern
• Propagation process
• Sensing technology
• Steel deck pavement
• Steel deck surfacing
• Steel decks
• Steel plates
• Three-point bending test

The fatigue propagation of cracking in epoxy asphalt concrete surfacing of steel decks was studied by using BOTDA sensing technology. Based on indoor three-point bending tests of composite beams composed of pavement and steel plate with cuts, the propagation process of cracking was monitored. The number of times of fatigue load action and the optical fiber strain values in each layer at various levels, including initial pavement cracking and cracking propagation till failure, were obtained. The formulas of crack fatigue propagation model with optical fiber strain Ε as the variable and the fatigue propagation patterns of cracking in pavement were presented. The results may serve as the base for the fatigue resistant and cracking resistant design of steel decks with epoxy asphalt concrete surfacing.

• 出版日期2009
• 单位东南大学