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Experimental study on flexural behavior of damaged beams strengthened with ultra-high performance concrete
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Jialiang KOU1, 2, Jiang WEN1, Yue QI1, Heng ZHOU3
Earthquake Engineering and Engineering Dynamics | 2025, 45(1) : 217 - 228
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Earthquake Engineering and Engineering Dynamics | 2025, 45(1): 217-228
Experimental study on flexural behavior of damaged beams strengthened with ultra-high performance concrete
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Jialiang KOU1, 2, Jiang WEN1, Yue QI1, Heng ZHOU3
Affiliations
  • 1.School of Civil and Architectural Engineering, Xi’an University of Technology, Xi’an 710048, China
  • 2.State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
  • 3.Northwest Engineering Corporation Limited, Power China, Xi’an 710065, China
Published: 2025-02-28 doi: 10.13197/j.eeed.2025.0122
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In order to study the mechanical properties of ultra-high performance concrete (UHPC)-reinforced damaged specimens, a total of 10 UHPC-reinforced damaged reinforced concrete beams were designed. These beams were subjected to a four-point bending performance test to study the crack development, damage pattern, load carrying capacity, and displacement of UHPC-reinforced reinforced concrete beams under bending. The effects of different reinforcement thicknesses and different reinforcement methods on the bending performance of UHPC-reinforced damaged RC beams were analyzed. The experimental study shows that the load carrying capacity of UHPC-reinforced damaged RC beams is greatly improved, and the ultimate load is improved by up to 194%.The number of cracks that occur when damage occurs is more than that of the original beams, and the development is more complete; the ductility is greatly improved compared with the original beams, and the displacement ductility coefficients of the reinforced beams are considered to be increased by 49.77%~178.31% compared with that of the original beams. The calculation method and basic assumptions of the ultimate load of the UHPC-reinforced concrete beams are proposed, and the test parameters are substituted into the formula. The results are more consistent with the test values, indicating that the proposed formula can effectively predict the ultimate load of such reinforced beams.

ultra-high performance concrete  /  strengthened specimens  /  flexural behavior  /  bearing capacity  /  constitutive model
Jialiang KOU, Jiang WEN, Yue QI, Heng ZHOU. Experimental study on flexural behavior of damaged beams strengthened with ultra-high performance concrete[J]. Earthquake Engineering and Engineering Dynamics, 2025 , 45 (1) : 217 -228 . DOI: 10.13197/j.eeed.2025.0122
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Year 2025 volume 45 Issue 1
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Article Info
doi: 10.13197/j.eeed.2025.0122
  • Receive Date：2023-10-31
  • Online Date：2026-03-20
  • Published：2025-02-28
Article Data
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History
  • Received：2023-10-31
  • Revised：2024-01-03
Funding
Affiliations
    1.School of Civil and Architectural Engineering, Xi’an University of Technology, Xi’an 710048, China
    2.State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    3.Northwest Engineering Corporation Limited, Power China, Xi’an 710065, China
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https://castjournals.cast.org.cn/joweb/dzgcygczd/EN/10.13197/j.eeed.2025.0122
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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