摘要This study aimed to comprehensively analyze the effects of the thickness of a super toughness concrete (STC) layer, the thickness of diaphragms, and the spacing of stud shear connectors on the fatigue property of a lightweight composite bridge deck. A multi-parameter analysis was performed on a steel-STC lightweight composite deck to facilitate its fatigue design. Based on a real bridge, a serial local finite element model was built to calculate the fatigue stress range of the typical fatigue-prone cracking details of the steel bridge deck under different combinations of the three parameters. On the basis of the FE analysis, the nominal stress of each fatigue-prone detail was obtained, and the following observations were obtained. First, the lightweight composite bridge deck structure could strongly enhance the local stiffness of the steel bridge deck, but its contribution to the global stiffness of the bridge deck is limited. Second, increasing the STC layer thickness from 45 mm to 60 mm could further reduce the fatigue stress range of fatigue-prone details in the steel deck. Third, increasing the thickness of the floor beams could improve the cracking details at the U-rib-to-diaphragm connection and butt weld at the U-rib lower edge, and the stress range reduction is about 20%-29%. Fourth, reducing the spacing of the stud shear connectors could obviously decrease the stress range of the U-rib-diaphragm welded joints and the arc cutouts in floor beams, and the stress range decreases by 22.01%-27.96%.
Abstract:This study aimed to comprehensively analyze the effects of the thickness of a super toughness concrete (STC) layer, the thickness of diaphragms, and the spacing of stud shear connectors on the fatigue property of a lightweight composite bridge deck. A multi-parameter analysis was performed on a steel-STC lightweight composite deck to facilitate its fatigue design. Based on a real bridge, a serial local finite element model was built to calculate the fatigue stress range of the typical fatigue-prone cracking details of the steel bridge deck under different combinations of the three parameters. On the basis of the FE analysis, the nominal stress of each fatigue-prone detail was obtained, and the following observations were obtained. First, the lightweight composite bridge deck structure could strongly enhance the local stiffness of the steel bridge deck, but its contribution to the global stiffness of the bridge deck is limited. Second, increasing the STC layer thickness from 45 mm to 60 mm could further reduce the fatigue stress range of fatigue-prone details in the steel deck. Third, increasing the thickness of the floor beams could improve the cracking details at the U-rib-to-diaphragm connection and butt weld at the U-rib lower edge, and the stress range reduction is about 20%-29%. Fourth, reducing the spacing of the stud shear connectors could obviously decrease the stress range of the U-rib-diaphragm welded joints and the arc cutouts in floor beams, and the stress range decreases by 22.01%-27.96%.
詹健, 邵旭东, 曲宛桐, 曹君辉. 钢-STC轻型组合桥面结构多参数分析[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 50-59.
ZHAN Jian, SHAO Xu-dong, QU Wan-tong, CAO Jun-hui. Multi-parameter Fatigue Analysis of a Steel-super Toughness Concrete Lightweight Composite Bridge Deck. Journal of Highway and Transportation Research and Development, 2019, 13(1): 50-59.
[1] WANG Chun-sheng, FENG Ya-cheng. Review of Fatigue Research for Orthotropic Steel Bridge Decks[J]. Steel Construction,2009,24(9):10-13,32. (in Chinese)
[2] JONG F B P. Overview Fatigue Phenomenon in Orthotropic Bridge Decks in the Netherlands[C]//2004 Orthotropic Bridge Conference. New York:ASCE,2004.
[3] SHAO X D, YI D T, HUANG Z Y, et al. Basic Performance of the Composite Deck System Composed of Orthotropic Steel Deck and Ultrathin RPC Layer[J]. Journal of Bridge Engineering, 2011,18(5):417-428.
[4] DING Nan, SHAO Xu-dong. Study on Fatigue Performance of Light-weighted Composite Bridge Deck[J]. China Civil Engineering Journal, 2015, 48(1):74-81. (in Chinese)
[5] Steel Structure Committee of Civil Society. Report of Thick Plate Welding Joint Related Research[R]. Tokyo:[s.n.], 2007. (in Chinese)
[6] WANG Chun-sheng, FENG Ya-cheng. Review of Fatigue Research for Orthotropic Steel Bridge Deck[J]. Steel Construction,2008,24(9):10-13,32. (in Chinese)
[7] ZHAO Xin-xin. Research on Fatigue Design Parameter and Structural Details for Orthotropic Deck[D]. Beijing:China Academy of Railway Sciences, 2010. (in Chinese)
[8] ZHANG Shi-hong, SHAO Xu-dong, CAO Jun-hui. Analysis on local stress at bulb flat rib-diaphragm connections in a lightweight composite bridge deck. China Civil Engineering Journal, 2016, 49(11):1-11. (in Chinese)
[9] SHAO Xu-dong, ZHOU Huan-yu, CAO jun-hui. Shear Behavior of Studs of Composite Deck System Composed of Steel and Ultra-thin RPC Layer[J]. Journal of Highway and Transportation Research and Development, 2013, 30(4):34-39. (in Chinese)
[10] LI Jia, YANG Bo, SHAO Xu-dong, et al. Research on Shear Fatigue of Studs for Composite Deck System of Steel Slab and Thin CRRPC layer.[J]. China Civil Engineering Journal, 2016, 49(6):67-75. (in Chinese)
[11] KOLSTEIN M H. Fatigue Classification of Welded Joints in Orthotropic Steel Bridge Decks[D]. Delft:Delft University of Tecnology,2007.
[12] DING Nan. Study on Influence of Ultra-High Performance Concrete on Light-weighted Composite Bridge Deck[D]. Changsha:Hunan University, 2014. (in Chinese)
[13] WANG Ya-fei, XU Hai-ying. Check of Steel Bridge Fatigue with Hot Spot Stress Method[J]. Journal of railway Engineering Society, 2012(9):50-52. (in Chinese)
[14] WANG W, DENG L, SHAO X. Fatigue Design of Steel Bridges Considering the Effect of Dynamic Vehicle Loading and Overloaded Trucks[J]. Journal of Bridge Engineering, 2016, 21(9):04016048.
[15] DENG L, YAN W, NIE L. A Simple Corrosion Fatigue Design Method for Bridges Considering the Coupled Corrosion-overloading Effect[J]. Engineering Structures, 2019, 178:309-317.
[16] KLOSTEIN M H. Fatigue Classification of Welded Joints in Orthotropic Steel Bridge Decks[D]. Delft:Delft University of Technology, 2007
[17] DB43/T 1173-2016, Technical Specification for Steel-STC Lightweight Composite Structure Deck[S]. (in Chinese)
[18] JTG D64-2015 Specifications for Design of Highway Steel Structure Bridge[S]. (in Chinese)
[19] TONG Le-wei, SHEN Zu-yan. Fatigue Assessment of Orthotropic Steel Bridge Decks[J]. China Civil Engineering Journal, 2000, 33(3):16-21. (in Chinese)
[20] SHAO Xu-dong, HU Jian-hua. The Steel-UHPC Lightweight Composite Bridge Structure[M]. Beijing:China Communications Press, 2015:82-89. (in Chinese)
[21] EN 1994-1-1:2004, Eurocode 4:Design of Composite Steel and Concrete Structures-Part 1-1:General Rules and Rules for Buildings[S].
[22] JI Tong-geng. Experimental Study of Shear Stiffness of Shear Bolt Studs[J]. World Bridges, 2013,41(6):62-66. (in Chinese)
[23] LI Jia, FENG Xiao-tian, SHAO Xu-dong, et al. Comparison of Mechanical Calculation and Actual Test for New STC Steel Bridge Paving System[J]. China Journal of Highway and Transport, 2014,27(3):39-44,50. (in Chinese)
[24] Beijing Tieke Engineering Inspection Center. Inspection Report of Composite Paving System on Mafang Beijiang Bridge with Steel Box Girder[R]. Beijing:Beijing Tieke Engineering Inspection Center, 2012. (in Chinese)
[25] Institute of Bridge Engineering of Hunan University. Research Report of the Fatigue Properties of the LWCD Schemes of the Second Dongting Lake Bridge with Open Ribs and Closed Ribs. (in Chinese)
[26] PENG Bo. Study on Fatigue Performance of Light-weighted Composite Bridge Deck with Closed Rib[D]. Changsha:Hunan University, 2016. (in Chinese)
[27] OUYANG Ze-hui. The Local Mechanical Performance of the Ultra-high Performance Light-weight Composite Bridge Deck[D]. Changsha:Hunan University, 2015. (in Chinese)
[28] ZHENG Han. Research on Spatial and full-range Mechanical Properties of Steel-UHPC Light-weighted Composite Bridge Deck[D]. Changsha:Hunan University, 2016. (in Chinese)
[29] ZHANG Song-tao. Research on Light-type Composite Bridge Deck System with Steel and Ultra-thin UHPC Layer[D]. Changsha:Hunan University, 2015. (in Chinese)
[30] XIAO Z G, YAMADA K, YA S, et al. Stress Analyses and Fatigue Evaluation of Rib-to-deck Joints in Steel Orthotropic Decks[J]. International Journal of Fatigue,2008,30(8):1387-1397
[31] CAO Jun-hui. Research on Light-type Composite Bridge Deck System with Steel and Ultra-thin UHPC Layer[D]. Changsha:Hunan University, 2016. (in Chinese)
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常柱刚, 王林凯, 夏飞龙. 基于CV NewMark-b法桥梁风致振动FSI数值模拟[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 28-37.