循环弯曲荷载作用下钢筋混凝土梁碳化深度预测

朱林楦; 张铭驿; 陈超然; 周志军; 王苗苗

doi:10.13204/j.gyjzG21112513

循环弯曲荷载作用下钢筋混凝土梁碳化深度预测

doi: 10.13204/j.gyjzG21112513

1. 长安大学公路学院, 西安 710064;
2. 云南省交通科学研究院有限公司, 昆明 650011;
3. 甘肃省交通规划勘察设计院股份有限公司, 兰州 730030

基金项目:

陕西省交通运输厅科研项目(20-13K)。

详细信息

作者简介:
朱林楦,女,1996年出生,博士研究生。电子信箱:zlx15615552173@163.com。

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出版历程
- 收稿日期: 2021-11-25

Prediction of Carbonation Depth of Reinforced Concrete Beams Under Cyclic Flexural Loads

1. School of Highway, Chang'an University, Xi'an 710064, China;
2. Yunnan Science Research Institute of Communication Co., Ltd., Kunming 650011, China;
3. Gansu Province Transport Planning, Survey & Design Institute Co., Ltd., Lanzhou 730030, China

摘要

摘要: 为研究循环弯曲荷载与碳化耦合作用下混凝土的劣化规律,开展了循环弯曲荷载作用下的钢筋混凝土梁的快速碳化试验,同时结合试验数据及理论分析,提出了循环弯曲荷载作用下的混凝土碳化深度预测模型,定量分析了应力水平及循环次数对混凝土碳化深度的影响,最后通过现有试验结果对模型进行验证。结果表明:碳化时间越长,混凝土碳化深度越大,但碳化速率逐渐减慢;应力水平越高,循环加载次数越多,混凝土疲劳损伤越严重,且疲劳损伤会加速混凝土的碳化;碳化模型的预测值与试验值吻合较好,相对误差小于5%,该模型可用于预测反复荷载作用下混凝土的碳化深度。
- 混凝土 /
- 循环弯曲荷载 /
- 疲劳损伤 /
- 碳化模型
Abstract: In order to study deterioration laws of concrete under combined action of cyclic flexural loads and carbonation, the accelerated carbonation test for RC beams under cyclic flexural loads was conducted. Simultaneously, based on theoretical analysis and experiment results, a prediction model for carbonation depth was proposed, which could quantitatively analyze the influence of stress levels and loading cycles on carbonation depths of concrete. Finally, the model was verified by existing test results. The results showed that carbonation depths of concrete increased with increase of carbonation time, but the carbonation rate slowed down gradually; the higher the stress level and the more loading cycles, the more serious the fatigue damage of concrete, which would accelerate carbonation of concrete; the predicted values by the carbonation depth model were in good agreement with the experimental results, and the relative errors were less than 5%. The model could be used to predict the carbonation depth of concrete under repeated loading.
- concrete /
- cyclic flexural load /
- fatigue damage /
- carbonation model

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参考文献(24)

[1]	JI Y S, WU M, DING B D, et al. The experimental investigation of width of semi-carbonation zone in carbonated concrete[J]. Construction and Building Materials,2014,65(29):67-75.
[2]	施锦杰,孙伟.混凝土中钢筋锈蚀研究现状与热点问题分析[J].硅酸盐学报,2010,38(9):1753-1764.
[3]	LI S, LIU J L, CUI C X, et al. Carbonation process of reinforced concrete beams under the combined effects of fatigue damage and environmental factors[J]. Applied Sciences, 2020, 10(11). DOI: 10.3390/app10113981.
[4]	马宏望,俞燕飞,梁超锋,等.不同应力状态下混凝土碳化性能研究进展[J].混凝土与水泥制品,2019(6):20-24.
[5]	JIANG C, HUANG Q H, GU X L, et al. Experimental investigation on carbonation in fatigue-damaged concrete[J]. Cement and Concrete Research,2017,99:38-52.
[6]	罗小勇,邹洪波,施清亮.不同应力状态下混凝土碳化耐久性试验研究[J].自然灾害学报,2012,21(2):194-199.
[7]	贺鹏飞,余志武,刘鹏,等. 混凝土碳化研究进展[C]//2018年全国学术年会论文集(上册).北京:《工业建筑》杂志社有限公司,2018.
[8]	韩建德,孙伟,潘钢华.混凝土碳化反应理论模型的研究现状及展望[J].硅酸盐学报,2012,40(8):1143-1153.
[9]	CASTEL A, FRANÇOIS R, ARLIGUIE G. Effect of loading on carbonation penetration in reinforced concrete elements[J]. Cement and Concrete Research,1999,29(4):561-565.
[10]	田浩,李国平,刘杰,等.受力状态下混凝土试件碳化试验研究[J].同济大学学报(自然科学版),2010,38(2):200-204,213.
[11]	袁承斌,张德峰,刘荣桂,等.混凝土在不同应力状态下的碳化[J].建筑结构,2004(4):32-34.
[12]	TANG J Z, WU Jin, ZOU Z H, et, al. Influence of axial loading and carbonation age on the carbonation resistance of recycled aggregate concrete[J]. Construction and Building Materials,2018,173:707-717.
[13]	唐官保,姚燕,王玲,等.应力作用下混凝土碳化深度预测模型[J].建筑材料学报,2020,23(2):304-308.
[14]	范燕平.荷载作用下混凝土梁的碳化研究[D].青岛:中国石油大学(华东),2016.
[15]	沈奇真. 碳化与荷载耦合作用下水泥基材料微结构演变与预测模型[D].南京:东南大学,2018.
[16]	JIANG C, HUANG Q H, GU X L, et al. Modeling the effects of fatigue damage on concrete carbonation[J]. Construction and Building Materials,2018,191:942-962.
[17]	周艳霞. 考虑疲劳损伤影响的混凝土碳化性能研究[D].西安:西安建筑科技大学,2016.
[18]	王海超. 钢筋混凝土构件腐蚀疲劳试验研究与理论分析[D].大连:大连理工大学,2004.
[19]	张誉,张伟平,屈文俊.混凝土结构耐久性概论[M].上海:上海科学技术出版社,2003.
[20]	陈才生,张军,金伟良,等.钢筋混凝土梁超载作用下疲劳性能试验研究[J].施工技术,2015,44(12):5-9.
[21]	逯静洲,国力,刘亚,等.疲劳荷载和碳化联合作用下混凝土损伤特性试验研究[J].混凝土,2017(1):63-66,70.
[22]	龚洛书,苏曼青,王洪琳.混凝土多系数碳化方程及其应用[J].混凝土及加筋混凝土,1985(6):10-16.
[23]	牛荻涛.混凝土结构耐久性与寿命预测[M]. 北京:科学出版社,2003.
[24]	TANAKA K, NAWA T, HASHIDA H, et al. Effect of repeated load on micro structure and carbonation of concrete and mortar[C]//Eighth International Conference on Durability of Building Materials and Components. 1999:256-265.