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J4  2012, Vol. 46 Issue (9): 1585-1591    DOI: 10.3785/j.issn.1008-973X.2012.09.006
土木工程     
CFRP加固前后桥梁构件超载疲劳试验研究
孙晓燕1, 徐冲2 , 王海龙1 , 褚霁芳3
1. 浙江大学 建筑工程学院, 浙江 杭州 310058; 2.中国汉嘉设计集团股份有限公司, 浙江 杭州 310005;
3.中国建筑股份有限公司, 北京 100048
Overloading simulation fatigue experiment of bridge member
with and without CFRP reinforcement
SUN Xiao-yan1, XU Chong2, WANG Hai-long1, CHU Ji-fang3
1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;2. Hanjia Design
Group of China, Hangzhou 310005, China; 3. China State Construction Co., Ltd., Beijing 100084, China
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摘要:

为了精确评估桥梁服役期间超载运营引发的疲劳损伤和失效风险,在对车辆荷载调查的基础上开展了采用碳纤维布 (CFRP) 加固前后桥梁构件的疲劳试验,分别模拟了一般超载运营、严重超载运营和组合超载运营状态,测试了结构构件超载运营后的承载能力,并对超载运营中的截面应变、裂缝形态、最大裂缝宽度和挠度等参数随超载循环次数的变化规律进行了监测.试验表明:超载运营对桥梁结构的影响主要以疲劳损伤的形式体现,且影响结构的变形能力;单纯衡量结构构件的承载能力不能反映结构的真实服役状态.在模拟超载的低周高应力循环作用下,截面应变随着疲劳次数的增加而持续增长,可近似满足平截面假设.超载运营下桥梁构件的疲劳性能应以钢筋应变和跨中挠度为主要控制指标.

Abstract:

In order to realize accurate evaluation of the fatigue damage and failure risk for existing bridges which suffering vehicle overloading, fatigue experiments of bridge component with and without carbon fiber reinforced plastics (CFRP) reinforcement were carried out based on vehicle load survey. Three overloading states were simulated, which were general state, serious state and combine state. The capacity after overloading was tested, and the performance parameters, such as section strain, crack pattern, maximum crack width, deflection, were monitored, then the development law of above parameters versus the number of fatigue cycles under overloading were investigated. The experimental results indicate that the capacity cannot be used to refer the service performance of bridge, and a better way to reflect the overloading effect is fatigue damage, which affects the deformation capacity of the bridge structure. The section strain increases with the number of fatigue cycles under low cycle fatigue load. The planesection assumption is still satisfied approximatively till the end of the fatigue cycle. The fatigue performance of bridge component under overloading should be evaluated using steel rebar strain and mid-span deflection as the main control indexes.

出版日期: 2012-09-01
:  U 44  
基金资助:

 国家“863”高技术研究发展计划资助项目(2007AA04Z437);国家自然科学基金资助项目(50808158);浙江省自然科学基金资助项目(Y107049);高等学校博士学科点专项科研基金资助项目(200803351117);浙江省重点科技创新团队资助项目(2010R50034).

通讯作者: 王海龙,男,副教授.     E-mail: hlwang@zju.edu.cn
作者简介: 孙晓燕(1976-),女,副教授,从事桥梁结构健康监测、既有桥梁评估和维修方面的研究.E-mail: selina@zju.edu.cn
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引用本文:

孙晓燕, 徐冲 , 王海龙 , 褚霁芳. CFRP加固前后桥梁构件超载疲劳试验研究[J]. J4, 2012, 46(9): 1585-1591.

SUN Xiao-yan, XU Chong, WANG Hai-long, CHU Ji-fang. Overloading simulation fatigue experiment of bridge member
with and without CFRP reinforcement. J4, 2012, 46(9): 1585-1591.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2012.09.006        http://www.zjujournals.com/eng/CN/Y2012/V46/I9/1585

[1] 美国各州公路与运输工作协会.美国公路桥梁设计规范1994[S].辛济平,等译. 北京:人民交通出版社,1997.
[2] 中国统计局.国家统计年鉴2008[M]. 北京: 中国统计出版社, 2008.
[3] 公路桥梁车辆荷载研究课题组. 公路桥梁车辆荷载研究[J]. 公路,1997(3):8-12.
GROUP OF HIGHWAY BRIDGE VEHICLE LOADS. Research on Highway bridge vehicle loads[J]. Highway, 1997(3): 8-12.
[4] 梅刚,秦权,林道锦. 公路桥梁车辆荷载的双峰分布概率模型[J]. 清华大学学报:自然科学版,2003, 43 (1):1394-1396.
MEI Gang, QIN Quan, LIN Daojin. Bimodal probabilistic model of highway and bridge vehicle loads[J]. Journal of Tsinghua University:Science and Technology, 2003, 43 (1):1394-1396.
[5] 王晓刚,顾祥林,张伟平. 碳纤维布加固锈蚀钢筋混凝土梁的抗弯刚度[J].建筑结构学报, 2009,30(5):169-176.
WANG Xiaogang, GU Xianglin, ZHANG Weiping. Flexural stiffness of corroded reinforced concrete beams strengthened with carbon fiber composite sheet[J]. Journal of Building Structures, 2009,30(5):169-176.
[6] HEFFERNAN P J, ERKI M A. Fatigue Behavior of reinforced concrete beams strengthened with carbon fiber reinforced plastic laminates[J]. Journal of Composites Construction, 2004, 8(2):132-140.
[7] SHAHAWY M, BEITELMAN T E. Static and fatigue performance of RC beams strengthened with CFRP Laminates[J].Journal of Structural Engineering, 1999, 25(6): 13-621.
[8] 王海超,贡金鑫,曲秀华. 钢筋混凝土梁腐蚀后疲劳性能试验研究[J]. 土木工程学报, 2005, 38 (11):32-37.
WANG Haichao, GONG Jinxin, QU Xiuhua. An experimental study on the fatigue behavior of corroded reinforced concrete beams [J]. China Civil Engineering Journal, 2005, 38 (11):32-37.
[9] TOUTANJI H, ZHAO L Y, DENG Y, et al.Cyclic behavior of RC beams strengthened with carbon fiber sheets bonded by inorganic matrix[J]. Journal of Materials in Civil Engineering, 2006,18 (1):28-35.
[10] 夏云龙. 预应力混凝土梁桥疲劳可靠性分析[D]. 西安:长安大学,2009.
XIA Yunlong. Fatigue reliability analysis of prestressed concrete beambridge [D]. Xian: Changan University, 2009.
[11] 孙晓燕,徐冲,王海龙,等. 用于疲劳可靠性分析的公路桥梁荷载效应分析[J]. 公路交通科技, 2011,28(5):80-86.
SUN Xiaoyan, XU Chong, WANG Hailong, et al. Investigation of highway bridge load effect for fatigue reliability analysis [J]. Journal of Highway and Transportation Research and Development, 2011,28(5): 80-86.
[12] 徐冲.超载下既有桥梁加固后疲劳性能试验研究[D]. 杭州:浙江大学,2011.
XU Chong. Experimental research on fatigue mechanical behavior of strengthened existing bridges under overloading [D]. Hangzhou: Zhejiang University, 2011.
[13] 徐冲,孙晓燕,王海龙,等.灰色经济计量学模型在交通量预测中的应用[J]. 公路工程,2010,35(5):34-38.
XU Chong, SUN Xiaoyan, WANG Hailong, et al. Application of a gray econometric model in traffic volume prediction[J]. Highway Engineering, 2010,35(5):34-38.
[14] 孙晓燕. 服役期及加固后服役桥梁可靠度评估和维修决策[D]. 大连: 大连理工大学, 2004.
SUN Xiaoyan. Reliabilitybased assessment of reinforced concrete bridges in commission and strengthened condition [D]. Dalian: Dalian University of Technology, 2004.

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