基于小波神经网络锈蚀钢筋强度预测研究.pdf

第27卷第3期
公路交通科技
Vol. 27 No. 3
2010年3月
Joual of Hi hway and Transpor ation Research and Development
Mar.2010
文章编号:1002-068(2010)03-000-06
基于小波神经网络锈蚀钢筋强度预测硏究
王磊,张建仁,金鹏飞2
(1.长沙理エ大学土木与建筑学院,湖南长沙41000
2.奉化市凯远工程咨询有限公司,浙江奉化315500)
摘要:为研究氯离子侵做和混凝土碳化综合作用下既有钢筋混凝土桥梁中锈蚀引起的钢萜屈服强度的退化,基于拆除
两座旧桥主要承重构件中筋锈蚀影响因的无损检测以及銹敒钢觞拉仲試验,考虑混凝土碳化、氣离子侵做、保护
层厚度以及混凝土强度等因素综合影响,利用小波神经网络在非线性建模中收攽迅遠等优越性,提出了基于小波神经
网络来预测既有钢筋混凝土桥梁中钢筋屈服强度方法。研究表明:锈蚀率較小情况下,锈蚀引起钢舫屈服强度的下降
并不显著。该预测方法可以考虑不同环境对混凝土桥梁中钢筋锈蚀的综合影响,精度满足要求,具有較好的适用性。
关键词:桥梁工程;钢筋屈服强度;小波神经网络;锈蚀;预测
中图分类号:U48
文献标识码:A
Prediction of e h of Corroded Reinforment Based on Wavelet Neutral Network
WANG Leil, ZHANG Jianren], JIN Pengfei?
1 School of i il En erng &A an ha n f e&T ol an ha Han 410004 Chi
2. Fenghua Kaiyuan Engineering Consultant Co., Id, Fenghua Zhejiang 315500, China
Abstract To invest i ate the rein oment yield stre th de ation inuced by coion under the entration of
chlorine ion an the on ca on of xtn o cee b s e nonesrutive inspetion n
the influencing acos of rin omen com n a he esn sting of the med reinforcement were
performed during the experimental investigation of the main members from two decommissioned old brides
onsidering the influenes of concrete anation, penetration of chlorine ion, thickness of concrete cover an
conce h a p i m d of e coed minfo ment yield strength based on the wavelet neutral
network was preened by using he apii of c e f the waelet neural network in nonlinear modelin
The reseach result shows that the reinfocement yield strength de radation induced by bridge corrosion is not
marble i h e ower com n s The eed pit on md can incoporate the integral effect of
various enviroments n rein ement msin of rod conte bridges. Its precision can satisfy enginering
requirements and exhibit good applicability
Key words bridge engineeing oment yield eth; wavelet neural network; crosion; prediction
0引宫
使用性能。钢筋锈蚀是一个非常复杂的过程,影响钢
筋锈蚀的因素很多,如:保护层厚度、混凝土的碳
既有钢筋混凝士桥梁中钢筋锈蚀,使得钢筋屈服化、氯化物侵蚀、裂発、混凝土强度等山。考虑这些
强度退化,从而导致结桥梁抗力衰减,影响桥梁正常影响因素以及破损检测和无损检测测量结果的偏差,
收稿日期:200905-20
基金项目:国家自然科学基金资助项目(50908023);交通运输部西部交通建设科技项目(200318009);溯南省应用基础重点项目
(06D008)
作者简介:王磊(199-),男,吉林榆树人,博士,讲师,从事桥梁可靠理论及耐久性评佔研究.( eiwlei @hotmail.mu)
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