|Table of Contents|

Experimental study on grouting reinforcement of PPC cable-stayed bridge main girder under fatigue damage(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年01期
Page:
139-147
Research Field:
桥隧结构
Publishing date:

Info

Title:
Experimental study on grouting reinforcement of PPC cable-stayed bridge main girder under fatigue damage
Author(s):
YUAN Ming1;  YANG Yifei1;  LIU Yun2;  YAN Donghuang1;  PENG Kunshuai1;  YUAN Sheng1
(1. School of Civil Engineering, Changsha University of Science & Technology, Changsha 410114, Hunan, China; 2. School of Road and Bridge Engineering, Hunan Communication Polytechnic, Changsha 410132, Hunan, China)
Keywords:
bridge engineering;  stiffness;  crack grouting;  cable-stayed bridge;  partial prestress;  bond strength
PACS:
U448.27
DOI:
10.19815/j.jace.2022.09113
Abstract:
In order to study the stiffness recovery effect and crack development of the main girder of partially prestressed concrete(PPC)cable-stayed bridge with fatigue damage after grouting reinforcement, a double-tower cable-stayed bridge was taken as the research background. Six beam sections in the middle span were selected to make a reduced scale model of PPC cable-stayed bridge with a similarity ratio of 7.42. After four rounds of fatigue tests under different initial damage states of the main girder, static load tests of 0.1, 0.2, 0.3, 0.5 mm maximum crack width on the main beam before grouting(corresponding to working conditions 1-4)were carried out, and then the main beam was unloaded to the dead load state. The cracks with residual crack width W≥0.05 mm were repaired with hydrophilic low viscosity epoxy structural adhesive under pressure, and the static load tests of the same crack width on the main beam after grouting were carried out. The deflection, cable force, stiffness and crack development of the main girder of PPC cable-stayed bridge under various working conditions before and after grouting were compared and analysed, and compared with the initial stiffness of the intact main girder. The results show that the epoxy structural adhesive and the main beam has a good synergistic effect, which greatly slows down the speed of crack propagation. During the whole test, the cable force basically changes linearly, and the stay cable is always in the elastic stage, which ensures that the bearing capacity of the main beam had greater surplus. Under the condition that the main beam experiences 0.5 mm level crack damage load, the epoxy structural adhesive improves the interface bonding strength at the crack, so that the stiffness of the main beam after grouting recovers well. In working conditions 1-4, the stiffness of the main girder is not lower than that of the main girder before grouting, but it cannot recover to the stiffness of the intact main girder.

References:

[1] 张阳山.大跨度公路斜拉桥极限承载力分析[D].合肥:合肥工业大学,2021.
ZHANG Yangshan. Ultimate load carrying capacity analysis of long span highway cable stayed bridge[D]. Hefei: Hefei University of Technology, 2021.
[2]刘 昀,颜东煌.部分预应力混凝土斜拉桥设计的合理性分析[J].中外公路,2015,35(2):83-86.
LIU Yun, YAN Donghuang. Rationality analysis of designing partially prestressed concrete cable-stayed bridge[J]. Journal of China & Foreign Highway, 2015, 35(2): 83-86.
[3]NOUR N A, VIE D, CHATEAUNEUF A, et al. Dimensioning of partially prestressed concrete beams,optimization of T-shaped section with heels[J]. Engineering Structures, 2021, 235: 112054.
[4]KARAYANNIS C G, CHALIORIS C E. Design of partially prestressed concrete beams based on the cracking control provisions[J]. Engineering Structures, 2013, 48: 402-416.
[5]杜进生,刘 玲,冯 威,等.基于裂缝宽度的部分预应力混凝土梁设计方法[J].交通运输工程学报,2018,18(2):23-30.
DU Jinsheng, LIU Ling, FENG Wei, et al. Design method of partially prestressed concrete beam based on crack width[J]. Journal of Traffic and Transportation Engineering, 2018, 18(2): 23-30.
[6]刘 昀.部分预应力混凝土斜拉桥非线性性能与设计方法研究[D].长沙:长沙理工大学,2015.
LIU Yun. Research on nonlinear performance and design method of partially prestressed concrete cable-stayed bridge[D]. Changsha: Changsha University of Science & Technology, 2015.
[7]陈羽中,张家滨,颜东煌.基于静载试验的PPC斜拉桥有限元模型修正分析[J].交通科学与工程,2021,37(4):59-66,100.
CHEN Yuzhong, ZHANG Jiabin, YAN Donghuang. Finite element model updating of PPC cable stayed bridge based on the static load experiment[J]. Journal of Transport Science and Engineering, 2021, 37(4): 59-66, 100.
[8]刘 昀,袁 明,颜东煌.大跨径混凝土斜拉桥模型试验[J].长安大学学报(自然科学版),2019,39(5):78-87.
LIU Yun, YUAN Ming, YAN Donghuang. Experimental investigation for concrete cable-stayed bridges with long-span[J]. Journal of Chang'an University(Natural Science Edition), 2019, 39(5): 78-87.
[9]OUKAILI N K. Serviceability and ductility of partially prestressed concrete beams under limited cycles of repeated loading[J]. International Journal of GEOMATE, 2019, 17(60): 9-15.
[10]HUANG Y, WEI J, DONG R Z. Stiffness of corroded partially prestressed concrete T-beams under fatigue loading[J].Magazine of Concrete Research, 2020, 72(7): 325-338.
[11]宋玉普,韩基刚.疲劳荷载作用下梁内不同类型钢筋破坏关系[J].哈尔滨工业大学学报,2012,44(8):96-100.
SONG Yupu, HAN Jigang. The failure relationship between different types of steel in beams under fatigue loading[J]. Journal of Harbin Institute of Technology, 2012, 44(8): 96-100.
[12]KIM S H, PARK J S, JUNG W T, et al. Experimental study on strengthening effect analysis of a deteriorated bridge using external prestressing method[J]. Applied Sciences, 2021, 11(6): 2478.
[13]WANG J J, ZHOU M, NIE X, et al. Simplified design method for the shear capacity of steel plate shear-strengthened reinforced-concrete beams[J]. Journal of Bridge Engineering, 2018, 23(11): 2478.
[14]WANG Z, LI L, GUO S C, et al. Nonlinear fatigue damage of cracked cement paste after grouting enhancement[J]. Applied Sciences, 2018, 8(7): 1105.
[15]刘国坤,虢曙安.灌缝-锚钢加固箱梁抗弯疲劳性能试验研究[J].中外公路,2019,39(5):143-145.
LIU Guokun, Guo Shuan. Experimental study on bending fatigue behavior of box girder bridges strengthened with caulking-steel anchor[J]. Journal of China & Foreign Highway, 2019, 39(5): 143-145.
[16]颜东煌,张德培,袁 明.仅裂缝灌浆处置PC斜拉桥主梁模型试验研究[J].中外公路,2019,39(6):59-65.
YAN Donghuang, ZHANG Depei, YUAN Ming. Experimental study on main girder models of PC cable-stayed bridge treated by crack grouting[J].Journal of China & Foreign Highway, 2019, 39(6): 59-65.
[17]城市桥梁设计规范:CJJ 11—2011[S].北京:中国建筑工业出版社,2012.
Code for design of the municipal bridge: CJJ 11—2011[S]. Beijing: China Architecture & Building Press, 2012.
[18]公路钢筋混凝土及预应力混凝土桥涵设计规范:JTG 3362—2018[S].北京:人民交通出版社,2018.
Specifications for design of highway reinforced concrete and prestressed concrete bridges and culverts: JTG 3362—2018[S]. Beijing: China Communications Press, 2018.
[19]颜东煌,邹恺为,袁 明,等.采用PPC设计的斜拉桥模型疲劳试验研究[J].中外公路,2021,41(1):59-63.
YAN Donghuang, ZOU Kaiwei, YUAN Ming, et al. Experimental research on fatigue model of PPC cable-stayed bridges[J]. Journal of China & Foreign Highway, 2021, 41(1): 59-63.
[20]公路桥梁加固设计规范:JTG/T J22—2008[S].北京:人民交通出版社,2008.
Specifications for strengthening design of highway bridges: JTG/T J22—2008[S]. Beijing: China Communications Press, 2008.

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Last Update: 2025-01-20