长寿命UHPFRC组合钢桥面板研究综述  

Review on research of long lasting UHPFRC composite steel bridge deck

作　　者：段兰[1] 袁翊竑 王春生[1] BRÜHWILER Eugen DUAN Lan;YUAN Yi-hong;WANG Chun-sheng;BRÜHWILER Eugen(School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China;Structural Maintenance and Safety Laboratory,Ecole Polytechnique Federale de Lausanne,Lausanne CH-1015,Vaud,Switzerland)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]瑞士洛桑联邦理工学院结构维护与安全实验室,沃州洛桑CH-1015

出　　处：《交通运输工程学报》2024年第1期68-84,共17页Journal of Traffic and Transportation Engineering

基　　金：国家自然科学基金项目(52078044);陕西省创新能力支撑计划项目(2019TD-022);中央高校基本科研业务费专项资金项目(300102219309)。

摘　　要：从三方面归纳与剖析了超高性能纤维增强水泥基(UHPFRC)复合材料组合钢桥面板的研究进展,包括强韧性组合层选材、界面传力机制与损伤累积机理、设计方法与工程应用;总结了纤维类型、纤维掺量对UHPFRC轴拉性能和抗弯性能的影响规律,确定了支撑组合钢桥面板结构分析的多种本构模型;对比分析了热连接、冷连接和混合连接组合界面设计方式的技术特点,归纳了胶粘界面、冷连接剪力键界面与混合连接界面的传力机理试验与理论研究成果;总结了基于冷连接设计理念的组合钢桥面板在合理构造、设计方法、规范规程与工程实践等方面的研究成果,并探讨了长寿命组合钢桥面板的创新与发展方向。研究结果表明:单一或混杂纤维的掺入综合提升了UHPFRC的应变强化能力、弯曲变形能力、抗断裂能力、裂缝宽度控制能力和抗疲劳性能,轴拉条件下UHPFRC三线型简化本构模型有力支撑了组合钢桥面板的设计计算,弹塑性损伤本构模型可描述不可逆疲劳损伤累积;验证了冷连接组合界面的增韧效果与可靠性,新型剪力键既可以提高组合效应,也能增韧UHPFRC层,混合连接界面具有降低界面局部应力集中、提高整体界面抗剪刚度、改善界面传力、提升施工效率等综合技术优势,内聚界面本构模型可实现冷连接界面损伤累积反演分析,界面损伤预测结果准确可靠;基于冷连接的UHPFRC组合钢桥面板可以有效提高钢桥面板的局部刚度,相关设计方法可支撑标准的编制与工程实践;应进一步提升UHPFRC的性价比和界面连接的高效性和可靠性,以支撑组合钢桥面板的长寿命、强韧性、轻量化、易维护、低能耗设计与建造。The research progress of ultra-high performance fiber reinforced cementitious(UHPFRC)composite material composite steel bridge decks was summarized and analyzed from three aspects,including the material selection for the high resilience composite layer,interface force transfer mechanism and damage accumulation mechanism,and design method and engineering practice.The effects of fiber type and fiber content on the axial tensile and flexural properties of the UHPFRC were summarized.Several constitutive models were determined for the structural analysis of the composite steel bridge deck.Technical characteristics were compared and analyzed for the interface design methods adopting hot,cold,and hybrid connections.The experimental and theoretical achievements in the force transfer mechanism of adhesive interface,shear connector interface with cold connection,and hybrid connection interface were summarized.The research results of rational configuration,design method,specification,and engineering practice were summarized for the composite steel bridge deck based on the cold connection design concept.The innovation and development directions of long lasting composite steel bridge decks were also discussed.Research results show that the addition of single or hybrid fibers can comprehensively improve the strain strengthening ability,flexural deformation ability,fracture resistance,crack width control ability,and fatigue resistance of the UHPFRC.The simplified three-linear constitutive model of UHPFRC under the axial tension powerfully supports the design and calculation of steel bridge decks.The elastoplastic damage constitutive model can describe the irreversible fatigue damage accumulation.The toughening effect and reliability of the composite interface with cold connection are verified.The innovative shear connector can both improve the composition effect and toughen the UHPFRC layer.The hybrid connection interface has comprehensive technical advantages such as reducing the local stress concentration,improving the overal

关 键 词：桥梁工程 长寿命 UHPFRC组合钢桥面板 冷连接件 组合界面 设计准则 免蒸养 

分 类 号：U448.36[建筑科学—桥梁与隧道工程]