[1]何世钦,贡金鑫.负载钢筋混凝土梁钢筋锈蚀及使用性能试验研究[J].东南大学学报(自然科学版),2004,34(4):474-479.[doi:10.3969/j.issn.1001-0505.2004.04.012]
 He Shiqin,Gong Jinxin.Experimental studies on steel bar corrosion and serviceability of reinforced concrete beam under service loading[J].Journal of Southeast University (Natural Science Edition),2004,34(4):474-479.[doi:10.3969/j.issn.1001-0505.2004.04.012]
点击复制

负载钢筋混凝土梁钢筋锈蚀及使用性能试验研究()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
34
期数:
2004年第4期
页码:
474-479
栏目:
土木工程
出版日期:
2004-07-20

文章信息/Info

Title:
Experimental studies on steel bar corrosion and serviceability of reinforced concrete beam under service loading
作者:
何世钦 贡金鑫
大连理工大学土木水利学院, 大连 116023
Author(s):
He Shiqin Gong Jinxin
School of Civil Engineering and Hydraulic, Dalian University of Technology, Dalian 116023, China
关键词:
钢筋混凝土 锈蚀 持续荷载 挠度 剩余承载力
Keywords:
reinforced concrete corrosion sustained loading deflection cracking residual loading capacity
分类号:
TU375.01
DOI:
10.3969/j.issn.1001-0505.2004.04.012
摘要:
通过对负载下锈蚀、不负载锈蚀梁和一组参考梁的对比试验,研究了荷载对钢筋混凝土结构中钢筋锈蚀及钢筋混凝土梁变形性能和剩余承载力的影响.整个锈蚀试验过程中施加的持续荷载为极限荷载的0%、25%、45%和65%.通过交替喷洒3.5%的盐水来模拟海洋潮汐环境.采用外加电流来加速钢筋锈蚀.整个试验过程中检测梁的挠度,达到预定的时间后进行剩余承载力试验.结果表明,荷载对钢筋锈蚀有明显影响,荷载作用使梁锈蚀加速,梁的挠度增大,剩余承载力减小.由于钢筋混凝土结构一般都是负载工作的,所以对钢筋混凝土结构使用寿命进行预测时,应考虑使用荷载和暴露环境对结构耐久性能的影响.
Abstract:
Based on testing of corroded reinforced concrete beams with or without sustained loading and comparison with a series of control beams, the effects of mechanical loading on corrosion of reinforcing steel, the flexural deflection and residual loading capacity of reinforced concrete beams are studied. Beam specimens were subjected to sustained loading respectively corresponding to 0%, 25%, 45%, 65% of the ultimate load during the corrosion test process. The marine tidal environment was simulated by alternately spraying and draining of 3. 5% NaCl acqueous solution. An external direct current technique was used to accelerate corrosion of the reinforcement. Beam deflections were recorded during the test process. The experiment of residual flexural loading capacity of the beams was carried out after the preset time. The results indicate that loading has a significant effect on corrosion. The corrosion rate is accelerated under sustained loading. With sustained loading the time-dependent deflection of the beams increase and the residual loading capacity decrease. The reinforced concrete structures are usually subjected to loading. Therefore in service-life prediction of reinforced concrete structures, the influence of the service load and environmental condition should be taken into account.

参考文献/References:

[1] Metha P K,Gerwick B C.Cracking-corrosion interaction in concrete exposed to marine environment [J].Concrete International, 1982,4(10):45-51.
[2] Rodriguez J, Ortega L M,Casal J.Load carrying capacity of concrete structures with corroded reinforcement [J]. Construction and Building Materials, 1997,11(4):239-248.
[3] Mangat P S, Elgarf M S.Flexural strength of concrete beams with corroding reinforcement [J].ACI Structural Journal, 1999,96(1):149-158.
[4] American Society for Testing and Materials.ASTM G 102—89 Standard Practice for Calculation Rates and Related Information from Electrochemical Measurement [S].Philadephia,PA,1989.
[5] 中华人民共和国交通部. JTJ 270—98水运工程混凝土试验规程[S].北京:人民交通出版社,1998.
[6] Ballim Y, Reid J C,Kemp A R.Deflection of RC beams under simultaneous load and steel corrosion [J].Magazine of Concrete Research, 2001,53(3):171-181.
[7] Rodriguez J, Ortega L M,Gracia A M.Assessment of structural elements with corroded reinforcement [A].In:Corrosion and Corrosion Protection of Steel in Concrete[C].Sheffied:Sheffield Academic Press,1994.171-185.
[8] Yoon S, Wang K,Weiss W,et al.Interaction between loading,corrosion and serviceability [J].ACI Materials Journal, 2000,97(6):637-644.

相似文献/References:

[1]刘界鹏,王伟,张小冬.钢筋混凝土与型钢混凝土超短柱的滞回性能试验研究[J].东南大学学报(自然科学版),2009,39(6):1193.[doi:10.3969/j.issn.1001-0505.2009.06.021]
 Liu Jiepeng,Wang Wei,Zhang Xiaodong.Seismic behavior of reinforced-concrete and steel reinforced concrete ultra short columns[J].Journal of Southeast University (Natural Science Edition),2009,39(4):1193.[doi:10.3969/j.issn.1001-0505.2009.06.021]
[2]潘华,邱洪兴.钢筋混凝土受弯构件正截面疲劳性能数值模拟[J].东南大学学报(自然科学版),2006,36(6):997.[doi:10.3969/j.issn.1001-0505.2006.06.025]
 Pan Hua,Qiu Hongxing.Numerical simulation of fatigue performance of reinforced concrete flexural components[J].Journal of Southeast University (Natural Science Edition),2006,36(4):997.[doi:10.3969/j.issn.1001-0505.2006.06.025]
[3]曹万林,张建伟,陶军平,等.内藏桁架的混凝土组合低剪力墙试验[J].东南大学学报(自然科学版),2007,37(2):195.[doi:10.3969/j.issn.1001-0505.2007.02.004]
 Cao Wanlin,Zhang Jianwei,Tao Junping,et al.Experimental study on low-rise RC shear wall with concealed truss[J].Journal of Southeast University (Natural Science Edition),2007,37(4):195.[doi:10.3969/j.issn.1001-0505.2007.02.004]
[4]程远兵,康谷贻,程文瀼.钢筋混凝土弯扭构件的全过程分析[J].东南大学学报(自然科学版),2006,36(1):97.[doi:10.3969/j.issn.1001-0505.2006.01.020]
 Cheng Yuanbing,Kang Guyi,Cheng Wenrang.Whole working history analysis of reinforced concrete members subjected to flexure-torsion loads[J].Journal of Southeast University (Natural Science Edition),2006,36(4):97.[doi:10.3969/j.issn.1001-0505.2006.01.020]
[5]贡金鑫,王海超,李金波.腐蚀环境中荷载作用对钢筋混凝土梁腐蚀的影响[J].东南大学学报(自然科学版),2005,35(3):421.[doi:10.3969/j.issn.1001-0505.2005.03.021]
 Gong Jinxin,Wang Haichao,Li Jinbo.Effect of loading on corrosion of reinforced concrete beam exposed in corroded environment[J].Journal of Southeast University (Natural Science Edition),2005,35(4):421.[doi:10.3969/j.issn.1001-0505.2005.03.021]
[6]李富民,袁迎曙.锈蚀钢绞线的静力拉伸断裂特性[J].东南大学学报(自然科学版),2007,37(5):904.[doi:10.3969/j.issn.1001-0505.2007.05.033]
 Li Fumin,Yuan Yingshu.Fracture behaviour of corroded steel strands under static tension[J].Journal of Southeast University (Natural Science Edition),2007,37(4):904.[doi:10.3969/j.issn.1001-0505.2007.05.033]
[7]徐秀丽,刘伟庆,蓝宗建,等.碳纤维加固钢筋混凝土受扭梁的试验研究[J].东南大学学报(自然科学版),2001,31(4):67.[doi:10.3969/j.issn.1001-0505.2001.04.016]
 Xu Xiuli,Liu Weiqing,Lan Zongjian,et al.Experimental Study on Torsional Reinforced Concrete Beam Strengthened with Carbon Fiber Reinforced Plastics[J].Journal of Southeast University (Natural Science Edition),2001,31(4):67.[doi:10.3969/j.issn.1001-0505.2001.04.016]
[8]李爱群,曹征良.钢筋混凝土抗震连系梁的设计与施工[J].东南大学学报(自然科学版),1997,27(3):1.[doi:10.3969/j.issn.1001-0505.1997.03.001]
 Li Aiqun,Cheng Wenrang,Cao Zhengliang.Design and Construction of Aseismic Reinforced Concrete Coupling Beams[J].Journal of Southeast University (Natural Science Edition),1997,27(4):1.[doi:10.3969/j.issn.1001-0505.1997.03.001]
[9]赵晓华,薛国亚,宋启根.带裂缝钢筋混凝土板的断裂力学分析[J].东南大学学报(自然科学版),1994,24(3):8.[doi:10.3969/j.issn.1001-0505.1994.03.002]
 Zhao Xiaohua,Xue,Guoya,et al.Analysis of Reinforced Concrete Plate with Cracks by Fracture Mechanics[J].Journal of Southeast University (Natural Science Edition),1994,24(4):8.[doi:10.3969/j.issn.1001-0505.1994.03.002]
[10]蓝宗建,黄兴棣,田安国,等.钢筋混凝土围套加固偏心受压柱的试验研究[J].东南大学学报(自然科学版),1994,24(3):112.[doi:10.3969/j.issn.1001-0505.1994.03.019]
 Lan Zongjian,Huang,Xingdi,et al.An Experimental Investigation on the RC Eccentric Compression Column Strengthened by the Enclosure[J].Journal of Southeast University (Natural Science Edition),1994,24(4):112.[doi:10.3969/j.issn.1001-0505.1994.03.019]

备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(50078009)、辽宁省科学技术基金资助项目(001077).
作者简介: 何世钦(1970—),女,博士生; 贡金鑫(联系人),男,副教授,gong_jx.vip@eyou.com.
更新日期/Last Update: 2004-07-20