新老桥间超高性能混凝土拼接接缝性能试验
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作者单位:

1.同济大学;2.上海市城市建设设计研究总院;3.上海罗洋新材料科技有限公司

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TU528.01

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Experimental Study on the Performance of the UHPC Stitching Joint Between New and Original Bridges
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    摘要:

    依托上海市济阳路高架新老桥拼接项目进行了基于高应变强化超高性能混凝土(UHPC)材料的拼接缝试验.试验采用非对称加载,目的是模拟新老桥的不均匀沉降.试验结果表明,UHPC拼缝整个受力破坏的过程大致可以分为3个阶段:弹性阶段、裂缝发展阶段、持荷至破坏阶段.在UHPC板下缘首先出现裂缝,之后UHPC板侧面出现大量微小裂缝,裂缝均以微裂缝簇的方式呈现,裂缝宽度发展缓慢,且沿着板高向上发展.UHPC转角为1.2%时裂缝宽度仅为0.16 mm,具有出色的裂缝控制能力.最终,UHPC板底出现主裂缝,横向钢筋和门筋屈服,钢筋布置方式满足试件破坏形态要求,说明试件的配筋合理.结合有限元模型对试验进行模拟,吻合度较高.利用有限元进行参数分析,发现增加接缝自由长度和减小接缝厚度可以有效增强接缝弯曲性能.由于UHPC材料进行接缝施工具有方便、快捷、性能优越等优点,提出基于上下部构造不连接类型的接缝形式,并给出具体配筋方案.

    Abstract:

    Based on the bridgestitching project of Jiyang viaduct, Shanghai, an experiment was conducted on highstrain hardening ultrahighperformance concrete (UHPC) stitching joints. Asymmetrical loading was used to simulate the bridge uneven settlement in the experiment. The experiment results show that the entire process can be divided into three stages: elastic stage, cracks developing stage and failure stage. First, cracks appear under the UHPC panels; then, many micro cracks appear on the side of the UHPC panels. The cracks appear in the form of microcrack clusters, and the crack width slowly increases. When the UHPC panel rotation is 1.2%, the crack width is 0.16 mm, so the UHPC has excellent crackcontrol ability. In the end, the main crack appears at the bottom of the UHPC panels, and the transverse reinforcements yield because the reinforcement layout satisfies the requirements of the failure mode of the specimen. Thus, the reinforcement arrangement of the specimen is reasonable. The experiment was simulated using the finiteelement model, and the results were coordinated with experiment results. The parameter analysis was carried out by the finite element method, and the results show that increasing joint free length and reducing joint thickness can effectively enhance the bending performance of joints. Because the advantages of the UHPC joint are convenience, rapidity, and excellent performance, a joint form based on the type of nonconnection of upper and lower structures is put forward. What’s more, a detailed reinforcement scheme is given, which will serve as a reference for similar projects in the future.

    参考文献
    [1]薛伟辰. 预制混凝土框架结构体系研究与应用进展[J]. 工业建筑, 2002, 32(11):47~50.XUE WC. Progress of Studies and Applications of Precast Concrete Frame Structure Systems[J]. Industrial Construction, 2002, 32(11):47-50.
    [2]刘桂琴,崔展.新技术新材料在桥梁改建工程中的应用[J].桥梁建设,2000(4):65-68.LIU GQ, CUI Z. The Application of New Technics and New Materials in the Rehabilitation of the Existing Bridges[J]. Bridge Construction, 2000(4):65-68.
    [3]Graybeal B A. UHPC in the US highway transportation system[C]. Proceedings of the Second International Symposium on Ultra High Performance Concrete, Kassel, Germany. 2008: 11-17.
    [4]Perry V H, Seibert P J. The use of UHPFRC (Ductal?) for bridges in North America: The technology, applications and challenges facing commercialization[C]. Proceedings of Second International Symposium on Ultra High Performance Concrete, University of Kassel, Germany. 2008: 815-822.
    [5]王俊颜,郭君渊,肖汝诚,等.高应变强化超高性能混凝土的裂缝控制机理和研究[J].土木工程学报,2017,50(11):10-17.WANG JY, GUO JY, XIAO RC, et al. Crack Control Mechanism and Research on High Strain Reinforced Super High Performance Concrete [J]. China Civil Engineering Journal,2017,50(11):10-17.
    [6]中华人民共和国住房和城乡建设部. 混凝土结构设计规范[M]. 中国建筑工业出版社, 2011.People''s Republic of China Ministry of housing and urban and rural construction. Specification for design of concrete structure [S]. China Construction Industry Press, 2011.
    [7]冯军骁, 郑七振, 龙莉波,等. UHPC材料连接的预制梁受弯性能试验研究[J]. 水资源与水工程学报, 2017,28(2):189~196.FENG JX, ZHENG QZ, LONG LB, et.al. Experimental study on the performance of precast beams UHPC material connection [J]. Journal of water resources and water engineering, 2017,28(2):189~196.
    [8]Lee C H, Kim Y J, Chin W J, et al. Shear Strength of Ultra High Performance Fiber Reinforced Concrete (UHPFRC) Precast Bridge Joint[J]. Rilem Bookseries, 2012, 2(8):413-420.
    [9]JeongRae Cho. Rolling Fatigue Test of Large-Sized UHPC Member for Cable Stayed Bridge[J]. Engineering, 2012, 04(10):646-654.
    [10]Steinberg E P, Semendary A A, Walsh K K. Implementing Ultra High Performance Concrete (UHPC) with Dowel Bars in Longitudinal Joints (Shear Key) in an Adjacent Box Beam Bridge[C]// International Interactive Symposium on UHPC. 2016.
    [11]MCS-EPFL. Ultra-high performance fibre reinforced cement-based composites (UHPFRC): construction material, dimensioning and application[S]. Switzerland Swiss Federal Institute of Technology, Switzerland, 2016
    [12]Lampropoulos A P, Paschalis S A, Tsioulou O T, et al. Strengthening of Reinforced Concrete Beams Using Ultra High Performance Fibre Reinforced Concrete (UHPFRC)[J]. Engineering Structures, 2016, 106:370-384.
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刘超,黄钰豪,陆元春.新老桥间超高性能混凝土拼接接缝性能试验[J].同济大学学报(自然科学版),2019,47(03):0322~0330

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  • 收稿日期:2018-03-26
  • 最后修改日期:2019-01-18
  • 录用日期:2018-12-13
  • 在线发布日期: 2019-04-03
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