Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (10): 2376-2384.doi: DOI:10.13229/j.cnki.jdxbgxb20210255

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Mechanical performance of under⁃bridge connectors of cable⁃stayed system strengthened bridge

You-zhi WANG(),Wen-shuai ZHAO,Jin-zhang LIU,Kai QIU,Sen JIA   

  1. School of Civil Engineering，Shandong University，Jinan 250061，China
  • Received:2021-03-26 Online:2022-10-01 Published:2022-11-11

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Abstract:

The cable-stayed system reinforcement method has been applied to some projects in recent years. The joints under the bridge have the characteristics of bearing combined shear and compression loads， double-shear interface， bonded steel plate and anchored bolt mixed connection， etc. The mechanical properties and failure modes are not clear. An accurate finite element model of a connector under the bridge was established by Abaqus finite element method， and its mechanical properties and failure modes were studied. The results show that the final failure mode of each model is the bolt shear failure. The final failure position of the model is divided into two categories： the bolt shear failure at the glue layer and the bolt shear failure at the contact surface of the two steel plates. Under the load， there are 4 kinds of bearing capacity change trends of the connectors under the bridge， and the bearing capacity of some models decreases obviously before failure. When only a single element among the factors that affect the ultimate bearing capacity of the model changes， the ultimate bearing capacity doesn't completely change in a monotonous trend， there is a complex coupling relationship between every element.

Key words: cable-stayed system reinforcement, under-bridge connector, combined shear and compression load, double shear interface, hybrid connection

CLC Number: 

  • U441.4

Fig.1

Finite element model"

Fig.2

Schematic diagram of pressure plate"

Fig.3

Schematic diagram of connecting plate"

Table 1

Dimension table of pressure plate"

类 型α/（°）θ/（°）a/mm
35°承压板35125116
45°承压板4513592
60°承压板6015050

Fig.4

Bilinear cohesion model"

Table 2

Parameters of adhesive layer"

胶层种类δ1/mmδS/mmGτc/（N·m-1）
A0.25510
B0.501010
C0.751510

Fig.5

Type I failure mode"

Fig.6

Type II failure mode"

Fig.7

Type III failure mode"

Fig.8

Type IV failure mode"

Table 3

failure mode and ultimate bearing capacityof bolts"

模型螺栓破坏模式极限承载力/kN
35?A?0.3Ⅰ?a506.99
35?A?0.4Ⅰ?b502.55
35?A?0.5Ⅰ?c497.10
35?A?0.6Ⅰ?c497.56
35?B?0.3Ⅰ?a510.98
35?B?0.4Ⅰ?b563.18
35?B?0.5Ⅱ588.54
35?B?0.6Ⅱ590.64
35?C?0.3Ⅳ?b536.87
35?C?0.4Ⅳ?a587.51
35?C?0.5Ⅲ626.12
35?C?0.6Ⅲ690.59
45?A?0.3Ⅳ?c358.95
45?A?0.4Ⅰ?a413.76
45?A?0.5Ⅰ?b414.54
45?A?0.6Ⅰ?c398.58
45?B?0.3Ⅳ?b359.18
45?B?0.4Ⅰ?a418.78
45?B?0.5Ⅰ?b444.46
45?B?0.6Ⅱ471.90
45?C?0.3Ⅳ?b358.71
45?C?0.4Ⅳ?a448.74
45?C?0.5Ⅳ?a469.17
45?C?0.6Ⅲ502.21
60?A?0.3Ⅳ?b248.10
60?A?0.4Ⅳ?b287.80
60?A?0.5Ⅰ?a329.79
60?A?0.6Ⅰ?a346.03
60?B?0.3Ⅳ?c249.46
60?B?0.4Ⅳ?c295.41
60?B?0.5Ⅰ?a335.09
60?B?0.6Ⅰ?a351.85
60?C?0.3Ⅳ?c266.88
60?C?0.4Ⅳ?c320.51
60?C?0.5Ⅳ?b357.41
60?C?0.6Ⅳ?a369.54

Fig.9

The effect of adhesive layer on ultimate bearingcapacity of different friction coefficient models"

Fig.10

The effect of loading angle on ultimate bearing capacity of different adhesive layer models"

Fig.11

Effect of friction coefficient on ultimate bearing capacity of models with different loading angles"

1 王海涛. CFRP板加固钢结构疲劳性能及其设计方法研究[D]. 南京: 东南大学工程力学系, 2016.
Wang Hai-tao. Research on fatigue performance and design method of steel structures strengthened with CFRP plates [D]. Nanjing: Department of Engineering Mechanics, Southeast University, 2016.
2 完海鹰, 江勇. 碳纤维复材布加固轴压圆管柱静力试验和数值分析[J]. 工业建筑, 2017, 47(2): 33-37.
Wan Hai-ying, Jiang Yong. Static test and numerical analysis of axially compressed circular tubular columns strengthened with CFRP [J]. Industrial Building, 2017,47 (2): 33-37.
3 赵士永, 褚少辉, 付素娟. 粘钢加固钢梁的有限元分析[J]. 华北地震科学, 2017, 35(2): 15-20.
Zhao Shi-yong, Chu Shao-hui, Fu Su-juan. Finite element analysis of steel beams strengthened with bonded steel [J]. North China Earthquake Science, 2017, 35(2): 15-20.
4 何攀, 王春江, 王元清, 等. 粘钢加固钢梁界面力学性能的精细有限元分析[J].工业建筑, 2017, 47(2): 43-46, 122.
He Pan, Wang Chun-jiang, Wang Yuan-qing, et al. Fine finite element analysis of mechanical properties of steel beam interface strengthened by steel sticking [J]. Industrial Building, 2017, 47(2): 43-46, 122.
5 Liu Xin-pei, Bradford Mark A, Chen Qing-jun, et al. Finite element modelling of steel-concrete composite beams with high-strength friction-grip bolt shear connectors[J]. Finite Elements in Analysis and Design, 2016, 108: 54-65.
6 Song Y C, Wang J, Brian U, et al. Stainless steel bolts subjected to combined tension and shear: behaviour and design[J]. Journal of Constructional Steel Research, 2020, 170: No. 106122.
7 高磊. 混合粘贴FRP加固钢筋混凝土梁的界面粘结特性和抗弯性能[D]. 济南: 山东大学岩土与结构工程研究中心, 2020.
Gao Lei. Interfacial bond behavior and flexural behavior of RC Beams Strengthened with hybrid bonded FRP [D]. Jinan: Geotechnical and Structural Engineering Research Center,Shandong University, 2020
8 韩佳豪. FRP型材-混凝土组合梁剪力连接件受力性能和计算方法研究[D]. 重庆: 重庆大学材料科学与工程学院, 2019.
Han Jia-hao. Study on mechanical behavior and calculation method of FRP concrete composite beam shear connectors [D]. Chongqing: School of Materials Science and Engineering, Chongqing University, 2019.
9 Chen C, Sui L L, Xing F, et al. Predicting bond behavior of HB-FRP strengthened concrete structures subjected to different confining effects[J]. Composite Structures, 2018, 187: 212-225.
10 Zhou Y W, Wang X W, Sui L L, et al. Effect of mechanical fastening pressure on the bond behaviors of hybrid-bonded FRP to concrete interface[J]. Composite Structures, 2018, 204: 731-744.
11 Dong H Y, Chen X P, Cao W L, et al. Bond behavior of high-strength recycled aggregate concrete-filled large square steel tubes with different connectors[J]. Engineering Structures, 2020, 211: No. 110392.
12 苏小卒, 黄长鑫. 受栓钉强度控制的钢板-混凝土界面黏结滑移性能试验与本构模型[J]. 建筑结构学报, 2018, 39(3): 167-174.
Su Xiao-zu, Huang Chang-xin. Experimental study on bond slip behavior and constitutive model of steel plate concrete interface controlled by stud strength [J]. Journal of Building Structure, 2018, 39(3): 167-174.
13 王威, 赵春雷, 苏三庆, 等. 带栓钉波形钢板混凝土组合构件粘结滑移性能与承载力试验研究[J]. 工程力学, 2019, 36(9): 108-119.
Wang Wei, Zhao Chun-lei, Su San-qing, et al. Experimental study on bond slip behavior and bearing capacity of corrugated steel plate concrete composite members with studs[J]. Engineering Mechanics, 2019, 36(9): 108-119.
14 Tao Z, Song T Y, Brian U Y, et al. Bond behavior in concrete-filled steel tubes[J]. Journal of Constructional Steel Research, 2016, 120: 81-93.
15 .混凝土结构加固设计规范 [S]..
16 王丹. 粘贴FRP加固带剪切裂缝的RC梁的界面剪切粘结破坏研究[D]. 济南:山东大学建筑与水利学院, 2018.
Wang Dan. Interfacial shear bond failure of RC beams with shear cracks strengthened by FRP bonding[D]. Jinan: School of Architecture and Water Conservancy, Shandong University, 2018.
17 刘华刚. 粘贴钢板加固型钢梁受弯二次受力试验研究[D]. 长沙: 湖南大学土木工程学院, 2019.
Liu Hua-gang. Experimental study on secondary bending of steel beams strengthened with bonded steel plates [D]. Changsha: School of Civil Engineering, Hunan University, 2019.
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