Reinforcement Boundary of Steel in the Reinforcing Layer
of RC Beam under the Secondary Load

doi:10.3969/j.issn.1674-0696.2015.01.07

Journal of Chongqing Jiaotong University(Natural Science) ›› 2015, Vol. 34 ›› Issue (1): 30-33.DOI: 10.3969/j.issn.1674-0696.2015.01.07

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Reinforcement Boundary of Steel in the Reinforcing Layer of RC Beam under the Secondary Load

Zhou Jianting¹, Li Zhigang¹, Liu Simeng^1,2

1. School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, China; 2. School of Civil Engineering, Chongqing University, Chongqing 400045, China

Received:2014-02-21 Revised:2014-03-15 Online:2015-02-15 Published:2015-03-10

二次受力RC梁增大截面加固配筋限值研究

周建庭¹, 李志刚¹，刘思孟^1,2

1.重庆交通大学土木建筑学院,重庆400074; 2.重庆大学土木工程学院,重庆400045

作者简介:周建庭（1972—），男，浙江金华人，教授，博士生导师，主要从事桥梁健康监测与结构安全评估方面的研究。E-mail:jt-zhou@163.com。
基金资助:
教育部博士点学科专项基金项目（20115522110001）；交通运输部西部交通建设科技项目（2011318223390）；重庆市教育委员会2013年科学技术研究项目基金支持项目（KJ130426）

Abstract

Abstract: The ultimate failure of RC beams was analyzed with increasing section method at different initial load to study the effects of secondary load on the relatively height of ultimate compressive region and the maximum strengthening quantity, the calculation formulas of RC strengthened beam’s relatively height of ultimate compressive region and maximum strengthening quantity of steel in the reinforcing layer at different initial load were obtained when the beams strength occurred plastic failure. The Finite Element Analysis (FEA) software ABAQUS was used to do the calculation verification, and the calculation results agreed well with analysis ones.

Key words: bridge engineering;secondary load, strengthened beams, ultimate failure, relatively height of ultimate compressive region, maximum strengthening quantity of steel, plastic failure

摘要： 通过分析在不同初始荷载下增大截面加固钢筋混凝土梁的极限破坏，研究二次受力对相对界限受压区高度和最大加固钢筋量的影响，得到加固梁发生塑性破坏时构件的相对界限受压区高度和加固钢筋的最大用量计算公式。利用有限元软件ABAQUS进行计算验证，计算结果与分析吻合较好。

关键词: 桥梁工程, 二次受力, 加固梁, 极限破坏, 相对界限受压区高度, 最大加固钢筋量, 塑性破坏

CLC Number:

TU375.1

Zhou Jianting, Li Zhigang, Liu Simeng. Reinforcement Boundary of Steel in the Reinforcing Layer of RC Beam under the Secondary Load[J]. Journal of Chongqing Jiaotong University(Natural Science), 2015, 34(1): 30-33.

周建庭, 李志刚，刘思孟，. 二次受力RC梁增大截面加固配筋限值研究[J]. 重庆交通大学学报（自然科学版）, 2015, 34(1): 30-33.

References

［1］卓尚木,季直仓,卓昌志.钢筋混凝土结构事故分析与加固［M］.北京:中国建筑工业出版社,1997.
Zhuo Shangmu,Ji Zhicang,Zhuo Changzhi.Accident Analysis of Reinforced Concrete Structures and Reinforcement ［M］.Beijing: China Architecture & Building Press,1997.
［2］王文炜,赵国藩,黄承逵,等.碳纤维布加固已承受荷载的钢筋混凝土梁抗弯性能试验研究及抗弯承载力计算［J］.工程力学,2004(4):172-178.
Wang Wenwei,Zhao Guofan,Huang Chengkui,et al.An experimental study of strengthening of inicially loaded reinforced concrete beams using CFRP sheets ［J］.Engineering Mechanics,2004(4): 172-178.
［3］蒙云,卢波.桥梁加固与改造［M］.北京:人民交通出版社,2012.
Meng Yun,Lu Bo.Bridge Strengthening and Rehabilitation ［M］.Beijing: China Communications Press,2012.
［4］张娜.CFRP加固钢筋混凝土梁规程研究及实际应用［D］.大连:大连理工大学,2013.
Zhang Na.Study on the Guidelines for CFRP Strengthened Rc Beams and the Application in Practice ［D］.Dalian: Dalian University of Technology,2013.
［5］ JTG/TJ 22—2008公路桥梁加固施工技术规范［S］.北京:人民交通出版社,2008.
JTG/TJ 22—2008 Specifications for Strengthening Design of Highway Bridges ［S］.Beijing: China Communications Press,2008.
［6］马来飞,顾祥林,李翔,等.二次受力下外粘纤维片材加固钢筋混凝土梁抗弯承载力［J］.结构工程师,2011,27(4):134-140.
Ma Laifei,Gu Xianglin,Li Xiang,et al.Bending bearing capacity of reinforced concrete beams strengthened with FRP sheets considering the effect of the second loading ［J］.Structural Engineers,2011,27(4): 134-140.
［7］王滋军,刘伟庆,姚秋来,等.考虑二次受力的碳纤维加固钢筋混凝土梁抗弯性能的试验研究［J］.工业建筑,2004,34(7):85-87.
Wang Zijun,Liu Weiqing,Yao Qiulai,et al.Experimental research on the flexural behavior of RC beams strengthened by carbon fiber sheet under quadratic loading ［J］. Industrial Construction,2004,34(7): 85-87.
［8］全学友,刘春茂.非卸载条件下受拉区加固梁的抗弯设计法［J］.重庆大学学报:自然科学版,2002,25(3):115-119.
Quan Xueyou,Liu Chunmao.Design method of moment-strengthening on tension side when load un-removed ［J］.Journal of Chongqing University: Natural Science,2002,25(3): 115-119.
［9］龙炳煌,周旺华.叠合梁的界限受压区高度和最大配筋率公式［J］.土木工程学报,1991,27(6):29-35.
Long Binghuang,Zhou Wanghua.Formulae for determining balanced depth of compression zone and maximum steel ratio in composite beams ［J］.Civil Engineering Journal,1991,27(6): 29-35.
［10］沈蒲生,谭宇昂.钢筋混凝土受弯构件粘贴加固时加固材料最大用量研究［J］.湖南大学学报:自然科学版,2004,31(6):51-55.
Shen Pusheng,Tan Yu’ang.A study on the maximum quantity of externally bonded strengthening materials of reinforced concrete flexural members ［J］.Journal of Hunan University: Natural Sciences,2004,31(6): 51-55.
［11］Shin Y S,Lee C.Flexural behavior of reinforced concrete beams strengthened with carbon fiber-reinforced polymer laminates at different levels of sustaining load［J］.ACI Structural Journal,2003,100(2): 231-239.
［12］Wenwei W,Guo L.Experimental study and analysis of RC beams strengthened with CFRP laminates under sustaining load ［J］.International Journal of Solids and Structures,2006,43(6): 1372-1387.
［13］Kim H S,Shin Y S.Flexural behavior of reinforced concrete (RC) beams retrofitted with hybrid fiber reinforced polymers (FRPs) under sustaining loads［J］.Composite Structures,2011,93(2): 802-811.
［14］张树仁,黄侨.结构设计原理［M］.北京:人民交通出版社,2010.
Zhang Shuren,Huang Qiao.Structural Design Principles ［M］.Beijing:China Communications Press,2010.

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Reinforcement Boundary of Steel in the Reinforcing Layer of RC Beam under the Secondary Load

二次受力RC梁增大截面加固配筋限值研究

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