（1 武汉理工大学土木工程与建筑学院，武汉 430070； 2 郑州市市政工程管理处，郑州 450053；3 宁波工程学院建筑与交通工程学院，宁波 315211；4 郑州大学土木工程学院，郑州 450001；5 宁波大学机械工程与力学学院，宁波 315211）

［摘要］开展锈蚀钢筋混凝土梁受弯试验，通过试验梁变形曲线、荷载挠度曲线及混凝土应变曲线等对试验梁变形性能进行深入分析。研究表明，在荷载作用下，试验梁B15-1，B15-2从屈服至破坏阶段的变形急剧增大，试验梁B15-2发生了脆性破坏。随着纵筋锈蚀率的增大，试验梁的屈服荷载及极限荷载均逐渐下降，屈服阶段不再明显，混凝土应变曲线不再符合平截面假定。当纵筋锈蚀率小于10%时，试验梁的刚度随锈蚀率的增大略有增加，当纵筋锈蚀率大于10%时，试验梁刚度下降较快，且变形不再协调。

［关键词］钢筋混凝土梁； 锈蚀率； 受弯； 变形性能

中图分类号：TU375文献标识码：A文章编号：1002-848X(2017)17-0093-04

Deformation performance analysis of corroded reinforced concrete beam

Zhang Haohua1,2, Zhao Zhuo3, Yuan Chengfang4, Wang Fei5

(1 School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China; 2 Zhengzhou Municipal Engineering Administration Department, Zhengzhou 450053, China; 3 School of Architecture and Traffic Engineering, Ningbo University of Technology, Ningbo 315211, China; 4 School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China; 5 Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, China)

Abstract:The flexural tests were carried out on corroded reinforced concrete beams to study the deformation performance of the test beams through deformation curve, load-deflection curve and concrete strain curve of test beams. The results show that under the loading actions, the deformations of the test beam B15-1 and B15-2 increase sharply from the yielding stage to the failure stage, and the brittle failure happens on the test beam B15-2. With the increase of corrosion rate of longitudinal reinforcement, the yielding load and ultimate load of the test beam decrease gradually,  the yielding stage is no longer obvious, and the concrete strain curve no longer conforms to the plane section assumption. When the corrosion rate of the longitudinal reinforcement is less than 10%, the rigidity of the test beam increases slightly with the increase of the corrosion rate. When the corrosion rate of the longitudinal reinforcement is larger than 10%, the rigidity of the test beam declines rapidly and the deformation is no longer coordinated.

Keywords:reinforced concrete beam; corrosion rate; flexural; deformation property

*宁波市桥梁技术科技创新团队（2014B81003），河南省科技厅重点科技攻关项目（142102310490）。

通讯作者：赵卓，博士，教授，Email：zzhuo_99@163.com。