Study on the Flexural Performance of Old Hollow Slab Beams Strengthened with Textile Reinforced Concrete
YIN Shiping1, XING Aojie1, SU Xun2, YANG Yuhou3, FENG Jian3, LI Litao3
1. Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China; 2. State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 3. Guangxi Transportation Science and Technology Group Co. Ltd, Nanning, Guangxi 530007, China
Abstract：Research purposes: To verify the feasibility of applying textile reinforced concrete (TRC) to bridge strengthening, this paper investigates the flexural performance of TRC strengthening old hollow slab beams based on four-point bending tests in the field to address the problems of inadequate load carrying capacity and large deflection of in-service reinforced concrete (RC) bridge main beams. Research conclusions: (1) The specimens mainly suffer from the failure modes of fracture of the textile, relative slip of the textile and the matrix, local debonding and interlaminar peeling, and the load carrying capacity is increased by 9.09%~30.3% by TRC reinforcement. (2) TRC reinforcement reduces the deflection of hollow slab beams by 8.4% to 26.8%, effectively improving their stiffness and limiting the development of cracks, but reducing ductility by 13.8% to 31.9%. (3) The optimum textile lap length obtained from this test is 400 mm. (4) The load carrying capacity of TRC reinforced hollow slab beams is calculated, and the theoretical value is in good agreement with the test value. (5) The research results have certain guiding significance for the application of TRC in the strengthening of bridge projects.
尹世平, 邢澳杰, 苏迅, 杨雨厚, 冯坚, 黎力韬. TRC加固老旧空心板梁受弯性能研究[J]. 铁道工程学报, 2024, 41(11): 47-53.
YIN Shiping, XING Aojie, SU Xun, YANG Yuhou, FENG Jian, LI Litao. Study on the Flexural Performance of Old Hollow Slab Beams Strengthened with Textile Reinforced Concrete. Journal of Railway Engineering Society, 2024, 41(11): 47-53.
Pino V, Nanni A, Arboleda D, etc. Repair of Damaged Prestressed Concrete Girders with FRP and FRCM Composites[J]. Journal of Composites for Construction, 2017(3): 04016111.
[2]
盛杰. 海洋大气环境下TRC加固RC梁受弯时变性能[J].建筑结构学报,2021(S1):284-290.Sheng Jie.Time-dependent Behavior of RC Beams Strengthened with TRC in Marine Atmosphere Environment[J]. Journal of Building Structures,2021(S1):284-290.
[3]
Verbruggen S, Tysmans T, Wastiels J.Bending Crack Behaviour of Plain Concrete Beams Externally Reinforced with TRC[J]. Materials and Structures, 2016(12):5303-5314.
[4]
尹世平,王璐晨,王聪聪,等.不同尺寸对TRC永久性模板叠合钢筋混凝土梁弯曲性能影响研究[J].建筑结构学报,2021(S1):291-301.Yin Shiping, Wang Luchen, Wang Congcong, etc. Flexural Performance of TRC Permanent Formwork Reinforced Concrete Beams with Different Dimensions[J]. Journal of Building Structures, 2021(S1):291-301.
[5]
杜运兴, 邵喜诚, 周芬. 持载下预应力CTRC板加固RC梁的抗弯性能[J]. 中南大学学报:自然科学版,2019(12):3066-3074.Du Yunxing, Shao Xicheng, Zhou Fen.Flexural Behavior of RC Beams Repaired with Prestressed CTRC Plates under Sustaining Loads[J]. Journal of Central South University:Natural Science Edition, 2019(12):3066-3074.
[6]
任伟,刘贺,李平, 等.预应力TRM加固RC梁正截面承载能力试验[J].广西大学学报:自然科学版,2020(1):113-120.Ren Wei, Liu He, Li Ping, etc. Experimental Study on Normal Section Bearing Capacity of RC Beams Strengthened with Prestressed TRM[J]. Journal of Guangxi University:Natural Science Edition,2020(1):113-120.
[7]
尹世平,徐世烺.纤维编织网增强混凝土的拉伸力学模型[J].复合材料学报,2012(5):222-229.Yin Shiping,Xu Shilang.Tensile Mechanical Model of Textile Reinforced Concrete[J].Acta Materiae Compositae Sinica,2012(5):222-229.
2024, Vol. 41 
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