作者单位: |
1Professor, Dept. of Bridge Engineering, Southwest Jiaotong Univ.,Chengdu 610031, China; Research Fellow, National Engineering Laboratory for Technology of Geological Disaster Prevention in Land Transportation, Southwest Jiaotong Univ., Chengdu 610031, China.
2Ph.D. Candidate, Dept. of Bridge Engineering, Southwest Jiaotong Univ., Chengdu 610031, China.
3M.S. Candidate, Dept. of Bridge Engineering, Southwest Jiaotong Univ., Chengdu 610031, China.
4Assistant Professor, Dept. of Bridge Engineering, Southwest Jiaotong Univ., Chengdu 610031, China; Research Fellow, Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong Univ., Chengdu 610031, China (corresponding author).
5Professorate Senior Engineer, CCCC Highway Consultants Co., Ltd., No. 85 Dawai St., Beijing 100088, China. |
摘要: |
This paper proposes a novel fully prefabricated composite deck system to achieve green and accelerated construction in bridge engineering. Ultra-high-performance concrete (UHPC), which has excellent mechanical properties, was employed as the main material of the prefabricated deck. Special connecting configurations, that is, steel plates with studs or pretensioned rebar, were used for enhancing the crack resistance of the steel-UHPC interface and facilitating convenient on-site assembly. Two sets of specimens featuring passive and active crack resistance were tested for investigation of the behavior of the composite deck under negative moment. The tests showed that the fully prefabricated composite deck provided satisfactory crack resistance compared with a traditional cast-in-place construction composite deck. On the basis of physical testing, a numerical model was built with Abaqus for further parametric analysis. Several design parameters were evaluated through supplementary analyses and recommendations were made for rebar pretension force and beam stiffener height. |