Research on flexural performance of UHPC deck panel #br# containing small coarse aggregates
Wang Yan1,2 Shao Xudong1,2 Cao Junhui1,2 Deng Shuwen1,2 Li Yuqi1,2
1. College of Civil Engineering, Hunan University, Changsha 410082, China; 2. Key Laboratory for
Wind and Bridge Engineering, Hunan University, Changsha 410082, China
Abstract：A novel UHPC deck panel containing small coarse aggregates was proposed and used to improve the flexural performance of ordinary concrete bridge deck for long-span composite girder cable-stayed bridges. Both the basic material properties of UHPC containing small coarse aggregates and the flexural performance of the UHPC deck panel containing small coarse aggregates were studied in the present work. Based on material tests, the constitutive relation, elastic modulus and drying autogenous shrinkage of UHPC containing small coarse aggregates were investigated. It was found based on the results that by adding small coarse aggregates to UHPC, the compressive performance can be improved and the drying autogenous shrinkage of UHPC can be decreased, but the bending or tensile strengths and toughness may also be decreased. In the bending tests of UHPC deck panel containing small coarse aggregates, the load-deflection relation and the moment-maximum crack width relation of the specimens were studied. It was found that the specimens had high cracking strengths and failed with multiple crack development. The results of bending tests, finite element analysis and bearing capacity calculation showed that the UHPC deck panel containing small coarse aggregates had good flexural performance and crack resistance, but the adverse effect of adding small coarse aggregates to UHPC on its tensile properties should be fully taken into account when calculating the bearing capacity.
王衍 邵旭东 曹君辉 邓舒文 李玉祺. 含小型粗骨料UHPC板抗弯性能研究[J]. 土木工程学报, 2020, 53(3): 67-79.
Wang Yan Shao Xudong Cao Junhui Deng Shuwen Li Yuqi. Research on flexural performance of UHPC deck panel #br# containing small coarse aggregates. 土木工程学报, 2020, 53(3): 67-79.
