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浙江大学学报(工学版)
浙江大学学报(工学版)
土木工程     
锈蚀高强度钢丝的力学性能与评级方法
潘骁宇1,谢旭1,李晓章1,孙文智2，朱汉华2
1. 浙江大学 土木工程学系，浙江 杭州 310058; 2.金华市公路管理局，浙江 金华 321017；3.浙江省公路管理局，浙江 杭州 310009
Mechanical properties and grading method of corroded high-tensile steel wires
PAN Xiao-yu1, XIE Xu1, LI Xiao-zhang1, SUN Wenzhi2, ZHU Han-hua3
1.Department of Civil Engineering, Zhejiang University, Hangzhou, 310058, China; 2.Jinhua Highway Administration Bureau, Jinhua, 321017, China; 3.Highway Administration Bureau of Zhejiang Province, Hangzhou, 310009, China
 全文: PDF(2580 KB)  
摘要：

为了建立高强度钢丝的锈蚀分级标准，以4座服役10 a以上的拱桥吊杆高强度钢丝样本为对象，在进行原状钢丝拉伸和疲劳试验研究的基础上，用刻痕方法模拟钢丝的表面蚀坑，通过有限元分析以及拉伸试验研究蚀坑形貌对钢丝力学性能的影响，建立蚀坑参数与钢丝极限应变的定量关系，提出考虑蚀坑形状的锈蚀钢丝评价标准。结果表明，锈蚀对钢丝弹性模量和极限强度的影响不敏感，但蚀坑引起钢丝的延性下降；锈蚀钢丝的延性下降程度与蚀坑部位的应力集中状况有关，用蚀坑形状参数可以较精确地评价钢丝受锈蚀影响的程度。
关键词： 有限元模型;  拉伸试验;  锈蚀分级;  拱桥吊杆;  锈蚀钢丝    
Abstract:

In order to establish a grading method of corroded high-tensile steel wires, samples of steel wire served for more than a decade on four arch bridges were employed and the mechanical properties were investigated from the tensile and fatigue tests. The effect of pitting geometries was analyzed by finite element method (FEM) and tension test, and pits were simulated by means of notches on the surface of steel wires. According to the theoretical analysis and experimental results, the quantitative relationship between the pitting geometries and the ultimate strain of wire was proposed, and a grading method based on pitting geometries was developed. The results show that the elastic modulus and the ultimate strength of the wire are not sensitive to, while the ductility is significantly influenced by the pitting corrosion. Besides, stress concentration around the pitting is the cause of the decline in ductility of corroded high-tensile steel wires. The status of corroded wires can be evaluated precisely by the depth and shape of pits.
Key words: tension test    hanger    finite element method (FEM)    grading method of corrosion    corroded wire
出版日期: 2014-12-08
:  U 443.38  
基金资助:

国家自然科学基金资助项目(51378460);浙江省交通科技资助项目(2012H47)
通讯作者: 谢旭，男，教授     E-mail: xiexu@zju.edu.cn
作者简介: 潘骁宇(1990-)，女，硕士生，从事拱桥吊杆损伤研究. E-mail: panxy@zju.edu.cn
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引用本文:

潘骁宇,谢旭,李晓章,孙文智，朱汉华. 锈蚀高强度钢丝的力学性能与评级方法[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2014.11.002.

PAN Xiao-yu, XIE Xu, LI Xiao-zhang, SUN Wenzhi, ZHU Han-hua. Mechanical properties and grading method of corroded high-tensile steel wires. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2014.11.002.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2014.11.002    或    http://www.zjujournals.com/xueshu/eng/CN/Y2014/V48/I11/1917

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