Moment Redistribution in UHPC Continuous Beams Reinforced with High-Strength Steel Bars: Numerical Investigation and Prediction Model

被引:0
|
作者
Li, Ling [1 ]
Li, Bei [1 ]
Zheng, Wenzhong [2 ,3 ]
机构
[1] Northeast Forestry Univ, Sch Civil Engn & Transportat, 26 Hexing Rd, Harbin 150040, Peoples R China
[2] Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China
[3] Harbin Inst Technol, Key Lab Struct Dynam Behav & Control, Minist Educ, Harbin 150090, Peoples R China
基金
中国国家自然科学基金;
关键词
UHPC; continuous beam; high-strength steel bars; moment redistribution; finite element; HIGH-PERFORMANCE CONCRETE; CAPACITY;
D O I
10.3390/buildings14010149
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Considering moment redistribution in the design of ultra-high-performance concrete (UHPC) statically indeterminate structures can fully exploit the load-bearing potential of members, simplify reinforcement details, and save construction costs. Due to the excellent properties of ultra-high-performance concrete (UHPC) that distinguish it from conventional concrete, new characteristics of the moment redistribution manifest in UHPC structures. In this study, a finite element (FE) analytical model was developed to simulate and analyze the bending behavior and moment redistribution of UHPC continuous beams reinforced with high-strength steel bars. The simulation and test results exhibited excellent agreement with the experimental research. Based on the FE model, a fine analysis for nine simulated two-span UHPC continuous beams was conducted with a detailed discussion of the failure modes, load-displacement curves, variations of support reaction forces, tensile strains of steel bars, and the whole process of moment redistribution. Subsequently, the variation rules of moment redistribution in UHPC continuous beams were explored by an extensive parametric study of 108 simulated beams. The studied parameters included a neutral axis depth factor, concrete strength, yielding strength of reinforcement, beam depth, span-depth ratio, reinforcement ratio between the mid-span and intermediate support section, as well as load forms. According to the numerical results, new formulas for estimating the two-stage moment redistribution in UHPC continuous beams with high-strength reinforcement were established. Finally, a comparison of moment redistribution between normal concrete continuous beams and UHPC continuous beams was performed. It can be observed that the elastic moment distribution in UHPC continuous beams was comparatively smaller, while the plastic moment distribution was relatively larger than those of normal concrete continuous beams. Overall, the degree of the total moment distribution in UHPC structures was greater than that of normal concrete structures due to the high ductility of UHPC. The research in this study may provide a technical reference for the practical engineering of UHPC.
引用
收藏
页数:26
相关论文
共 50 条
  • [41] Redistribution of Moment in Concrete Continuous Beams Reinforced with Steel Rebars and Fiber-Reinforced Polymer
    Fouad, Randa
    AbouBeah, Ayman S.
    Khalil, Ayman
    Zaher, Amr
    Said, Hadad
    PRACTICE PERIODICAL ON STRUCTURAL DESIGN AND CONSTRUCTION, 2022, 27 (04)
  • [42] Experimental investigation on flexural performance of corroded RC beams with high-strength concrete and steel bars
    Yu, Xiao-Hui
    Yang, Ao
    Dai, Kuang-Yu
    Zhang, Wei-Heng
    Lu, Da-Gang
    Qian, Kai
    CASE STUDIES IN CONSTRUCTION MATERIALS, 2024, 21
  • [43] Redistribution of moments in reinforced high-strength concrete beams with and without confinement
    Lou, Tiejiong
    Lopes, Sergio M. R.
    Lopes, Adelino V.
    STRUCTURAL ENGINEERING AND MECHANICS, 2015, 55 (02) : 379 - 398
  • [44] Experimental study on moment redistribution in reinforced concrete continuous beams with HRB500/HRB600 steel bars
    Zheng W.-Z.
    Li L.
    Wang Y.
    Gongcheng Lixue/Engineering Mechanics, 2019, 36 (03): : 79 - 94
  • [45] Flexural behavior of concrete beams reinforced with high-strength steel bars after exposure to elevated temperatures
    Zhao, Jun
    Jiang, Yibo
    Li, Xiaopeng
    CONSTRUCTION AND BUILDING MATERIALS, 2023, 382
  • [46] Calculational method for short-term crack of reinforced concrete beams with high-strength steel bars
    Zhao, Yong
    Wang, Xiaofeng
    Cheng, Zhijun
    Zhou, Jianmin
    Jianzhu Jiegou Xuebao/Journal of Building Structures, 2011, 32 (01): : 50 - 57
  • [47] Effect of steel and synthetic fibers on flexural behavior of high-strength concrete beams reinforced with FRP bars
    Yang, Jun-Mo
    Min, Kyung-Hwan
    Shin, Hyun-Oh
    Yoon, Young-Soo
    COMPOSITES PART B-ENGINEERING, 2012, 43 (03) : 1077 - 1086
  • [48] Cyclic behavior of steel tube-reinforced high-strength concrete composite columns with high-strength steel bars
    Zhang, Jianwei
    Li, Xiangyu
    Cao, Wanlin
    Yu, Cheng
    ENGINEERING STRUCTURES, 2019, 189 : 565 - 579
  • [49] Seismic fragility analysis of high-strength concrete frame structures reinforced with high-strength steel bars
    Liu, Juan
    Zhang, Jianwei
    Zhao, Zuozhou
    STRUCTURAL DESIGN OF TALL AND SPECIAL BUILDINGS, 2024, 33 (10):
  • [50] Serviceability and moment redistribution of continuous concrete members reinforced with hybrid steel-BFRP bars
    Akiel, Mohammad S.
    El-Maaddawy, Tamer
    El Refai, Ahmed
    CONSTRUCTION AND BUILDING MATERIALS, 2018, 175 : 672 - 681