[1]杨晓明,吴天宇,陈永林.锈蚀钢筋混凝土梁受弯性能试验研究[J].自然灾害学报,2018,(05):070-78.[doi:10.13577/j.jnd.2018.0509]
 YANG Xiaoming,WU Tianyu,CHEN Yonglin.Experimental study on the bending performance of corroded reinforced concrete beam[J].,2018,(05):070-78.[doi:10.13577/j.jnd.2018.0509]
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锈蚀钢筋混凝土梁受弯性能试验研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年05期
页码:
070-78
栏目:
出版日期:
2018-10-28

文章信息/Info

Title:
Experimental study on the bending performance of corroded reinforced concrete beam
作者:
杨晓明 吴天宇 陈永林
辽宁工程技术大学 土木工程学院, 辽宁 阜新 123000
Author(s):
YANG Xiaoming WU Tianyu CHEN Yonglin
College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China
关键词:
钢筋锈蚀钢筋混凝土梁承载力应力抗拉强度
Keywords:
reinforcement corrosionreinforced concrete beamload carrying capacitystresstension strength
分类号:
P315.92;X9
DOI:
10.13577/j.jnd.2018.0509
摘要:
本文针对锈蚀钢筋混凝土梁的受弯性能展开试验研究。采用人工加速锈蚀的方法,制作不同锈蚀率的钢筋混凝土梁,采用四点受弯的加载形式进行静力加载至破坏,破坏后取出钢筋测量锈蚀率及抗拉强度。分析试验结果可以得出以下结论:在利用实测数据进行锈蚀钢筋强度统计回归中可采用按未锈蚀钢筋截面面积计算锈蚀钢筋强度的方法,以便在锈蚀钢筋混凝土结构安全评估的时候可以直接采用按上述回归公式计算出的锈蚀钢筋强度作为结构内钢筋强度,从而避免了对钢筋截面面积和钢筋强度同时修正的困难。对应锈蚀钢筋强度(按未锈蚀钢筋截面面积计算)下降程度可以发现,当锈蚀率较小(<10%)时,钢筋混凝土梁的承载力退化主要是因为钢筋强度的下降;当锈蚀率较大(>10%)时,钢筋混凝土梁的承载力退化不单是因为钢筋强度的下降,由锈蚀引起的钢筋与混凝土间的粘结退化也起到了关键作用。
Abstract:
The experimental study on the bending performance of corroded reinforced concrete beam was carried out in this paper. The reinforced concrete beams with different corrosion ratios were fabricated by artificial accelerated method and four-point bending test was applied on these corroded beams. After test, the corroded steel bars were obtained and their corrosion ratio and tension strength were measured. From the results some conclusions can be given. The tension strength of corroded bars can be calculated by measured yielding force of corroded steel bars and section area of non-corroded steel bars. The tension strength can be used to calculate the load carrying capacity of existing concrete structure, which avoids the problem of modifying the section area and tension strength of corroded steel bars at the same time. Besides, the decrease of tension strength of corroded bars is the main reason for the deterioration of concrete beams when the corrosion ratio is less than 10%. However, when the corrosion ratio is more than 10%, the bonding performance between concrete and steel play a key role for the deterioration of load carrying capacity.

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备注/Memo

备注/Memo:
收稿日期:2017-12-14;改回日期:2018-04-17。
基金项目:辽宁省自然科学基金项目(20170540414);辽宁省教育厅杰出青年学者成长计划(LJQ2013037)
作者简介:杨晓明(1977-),男,教授,博士,主要从事结构损伤识别及耐久性研究.E-mail:xiao_m_y@163.com
更新日期/Last Update: 1900-01-01