铁路UHPC梁的正截面抗弯承载力计算公式及应用

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Abstract Research purposes: In order to give full play to the high tensile strength of UHPC and explore the reasonable inclusion of UHPC tensile strength in the design of railway UHPC beam flexural capacity, based on the existing railway bridge and culvert specifications, the calculation formulas of normal section flexural capacity of prestressed UHPC rectangular and T-section beams considering UHPC tensile strength are established. Compared with the test results of 27 groups of test beams, the feasibility of the calculation formula of flexural capacity is verified. Combined with the design example of 24 m span prestressed UHPC railway bridge, the flexural bearing capacity and safety factor of beam body considering UHPC tensile strength are compared and analyzed.
Research conclusions: (1) Combined with the railway bridge design code system, the calculation formula of flexural capacity of railway UHPC bridge considering UHPC tensile strength is deduced. (2) Compared with the results of 27 groups of test beams, the calculation formula of flexural capacity in this paper is in good agreement with the test results, which can be used for engineering design. (3) Compared with the bearing capacity results without considering the tensile strength of UHPC, the ultimate bearing capacity of prestressed UHPC beams considering the tensile strength of UHPC in the tensile area can be increased by about 6%. When designing railway UHPC beams, considering the contribution of UHPC in the tensile area of the section can further optimize the section and save materials. (4) The research results have theoretical guiding significance for the design of railway UHPC beams.

Key words： railway bridge UHPC flexural capacity of normal section reinforcement ratio strength safety factor

Received: 16 March 2021

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TU37

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	LIN Pengzhen
	ZHAO Hongwei
	MA Junjun

Cite this article:

LIN Pengzhen,ZHAO Hongwei,MA Junjun. Calculation Formula of Flexural Capacity of Normal Section of UHPC Railway Beams and Its Application[J]. Journal of Railway Engineering Society, 2022, 39(5): 33-38.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I5/33

[1]	邵旭东, 邱明红, 晏班夫, 等. 超高性能混凝土在国内外桥梁工程中的研究与应用进展[J]. 材料导报, 2017(23): 33-43.Shao Xudong, Qiu Minghong, Yan Banfu, etc. A Review on the Research and Application of Ultra-high Performance Concrete in Bridge Engineering Around the World[J]. Materials Review, 2017(23):33-43.
[2]	宋林, 吴大健, 段宝山. UHPC Π形梁桥设计计算中法标准对比[J]. 中外公路, 2020(5): 87-92.Song Lin, Wu Dajian, Duan Baoshan. Comparison of Chinese and French Standards in Design and Computation of UHPC Π-shaped Girder Bridge[J].Journal of China & Foreign Highway,2020(5):87-92.
[3]	TB 10092—2017, 铁路桥涵混凝土结构设计规范[S].TB 10092—2017, Code for Design of Concrete Structures of Railway Bridge and Culvert[S].
[4]	Abrishambaf A, Pimentel M, Nunes S. Influence of Fibre Orientation on the Tensile Behaviour of Ultra-High Performance Fibre Reinforced Cementitious Composites[J]. Cement & Concrete Research, 2017,97:28-40.
[5]	Hisham Mohamad Ali, Jamal Saeed abd alamir, Nagham Tariq Hamad. First Diagonal Cracking and Ultimate Shear of Reactive Powder Concrete T-Beams without Stirrups[J]. Journal of Engineering and Sustainable Development, 2014(5): 149-164.
[6]	Singh M , Sheikh A H , Ali M , etc. Experimental and Numerical Study of the Flexural Behaviour of Ultra-High Performance Fibre Reinforced Concrete Beams[J]. Construction & Building Materials, 2017,138:12-25.
[7]	徐明雪, 梁兴文, 汪萍, 等. 超高性能混凝土梁正截面受弯承载力理论研究[J]. 工程力学, 2019(8):70-78.Xu Mingxue, Liang Xingwen, Wang Ping, etc. Theoretical Investigation on Normal Section Flexural Capacity of UHPC Beams[J]. Engineering Mechanics, 2019(8):70-78.
[8]	梁兴文, 汪萍, 徐明雪, 等. 配筋超高性能混凝土梁受弯性能及承载力研究[J]. 工程力学, 2019(5): 110-119.Liang Xingwen, Wang Ping, Xu Mingxue, etc. Investigation on Flexural Capacity of Reinforced Ultra High Performance Concrete Beams[J]. Engineering Mechanics, 2019(5):110-119.
[9]	Khalil W, Al-Hassani H, Danha L S. Prediction of the Nominal Bending Moment Capacity for Plain and Singly Reinforced Rectangular RPC Beam Sections[J]. Engineering and Technology Journal, 2015(5):1113-1130.
[10]	李莉. 活性粉末混凝土梁受力性能及设计方法研究[D]. 哈尔滨: 哈尔滨工业大学, 2010.Li Li. Mechanical behavior and Design Method of Reactive Powder Concrete Beams[D]. Harbin: Harbin Institute of Technology, 2010.
[11]	邓宗才,王义超,肖锐,等. 高强钢筋UHPC梁抗弯性能试验研究与理论分析[J].应用基础与工程科学学报,2015(1):68-78.Deng Zongcai, Wang Yichao, Xiao Rui, etc. Flexural Test and Theoretical Analysis of UHPC Beams with High Strength Rebars[J]. Journal of Basic Science and Engineering, 2015(1):68-78.
[12]	方志,刘明,郑辉. 预应力活性粉末混凝土箱梁抗弯性能试验[J]. 建筑科学与工程学报, 2015(6): 8-16.Fang Zhi, Liu Ming, Zheng Hui. Experiment on Flexural Behaviors of Prestressed Reactive Powder Concrete Box Girders[J]. Journal of Architecture and Civil Engineering, 2015(6): 8-16.
[13]	徐海宾,邓宗才.预应力超高性能钢纤维混凝土梁受弯性能试验研究[J]. 建筑结构学报, 2014(12): 58-64.Xu Haibin, Deng Zongcai. Experimental Research on Flexural Behavior of Prestressed Ultra High Performance Steel Fiber Concrete Beams[J]. Journal of Building Structures, 2014(12): 58-64.
[14]	刘琛.高速铁路48m跨度超高性能混凝土简支梁设计及抗弯性能试验研究[J]. 铁道建筑, 2019(8):19-23.Liu Chen. Design on 48 m Span UHPC Simply-supported Girder of High Speed Railway and Experimental Study on Its Flexural Behavior[J]. Railway Engineering, 2019(8):19-23.