再生混凝土疲劳可靠度及疲劳寿命预测

钟楚珩; 龙宇华; 周金枝; 吴维熙

doi:10.13204/j.gyjzG21080909

再生混凝土疲劳可靠度及疲劳寿命预测

doi: 10.13204/j.gyjzG21080909

1. 湖北工业大学土木建筑与环境学院, 武汉 430070;
2. 桥梁结构健康与安全国家重点实验室, 武汉 430034

基金项目:

桥梁结构健康与安全国家重点实验室项目(BHSKL19-04-KF)。

详细信息

作者简介:
钟楚珩,男,1989年出生,博士,讲师。

通讯作者:
周金枝,zhoujinzhi@hbut.edu.cn。

计量
- 文章访问数: 138
- HTML全文浏览量: 33
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2021-08-09
- 网络出版日期: 2022-07-25

Research on Fatigue Reliability and Fatigue Life Prediction of Recycled Aggregate Concrete

1. School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430070, China;
2. State Key Laboratory for Health and Safety of Bridge Structures, Wuhan 430034, China

摘要

摘要: 为了研究再生混凝土的弯曲疲劳性能和疲劳可靠度,对普通混凝土(NAC)和再生混凝土(RAC)进行不同应力水平下(S=0.6、0.7、0.9)弯曲疲劳试验,获得不同应力水平下试件的纵向应变和疲劳寿命。并对疲劳寿命进行两参数Weibull分布检验,建立的S-N-P_f方程。再依据对数疲劳寿命一般遵循对数正态分布的规律,基于Palmgren Miner疲劳模型,得出可靠度计算式,对混凝土疲劳可靠度进行分析。结果表明:在不同应力水平下,RAC的疲劳寿命较NAC来说较小,纵向应变较NAC较大,抗弯疲劳性能较NAC差,其疲劳可靠度也低于NAC。且在对NAC的分析中假设疲劳寿命服从Weibull分布所得不同可靠度下的预测疲劳寿命,比假设服从对数正态分布更接近疲劳寿命临界值,而在对RAC的分析中,两者结果相差不大。
- 再生混凝土 /
- 弯曲疲劳寿命 /
- 两参数Weibull分布 /
- S-N-P_f方程 /
- 疲劳可靠度 /
- 预测疲劳寿命
Abstract: The flexural fatigue tests of natural aggregate concrete (NAC) and recycled aggregate concrete (RAC) were investigated at three different stress levels (S=0.6, 0.7, 0.9) to study the fatigue properties and fatigue reliability of recycled aggregate concrete, the longitudinal strain and fatigue life at different stress levels were obtained. The two-parameter Weibull distribution was analyzed, and the S-N-P_f equation was established. And since the logarithmic fatigue life generally follows a lognormal distribution, based on the Miner fatigue model, the reliability formula was derived and the fatigue reliability was calculated. The results showed that under different stress levels, the fatigue life of RAC was smaller than that of NAC, the longitudinal strain of RAC was larger than that of NAC, the flexural fatigue resistance and the fatigue reliability of RAC were lower than that of NAC. It was assumed that the fatigue life obeyed the Weibull distribution, the predicted fatigue life under different reliability was closer to the critical value than if it obeyed the lognormal distribution in the analysis of NAC. The results were not much different in the analysis of RAC.
- recycled aggregate concrete /
- flexural fatigue life /
- two-parameter Weibull distribution /
- S-N-P_f equation /
- fatigue reliability /
- prediction of fatigue life

HTML全文

参考文献(19)

[1]	赵由才,王罗春.建筑垃圾的环境污染综述[C]//第五届中国粉煤灰、矿渣及煤矸石加工与应用技术交流大会.南京:2007.
[2]	李清海,孙蓓.国内外建筑垃圾再生利用的研究动态及发展趋势[J].中国建材科技,2009(18):119-122.
[3]	魏英烁,姬国强,胡力群.建筑垃圾回收再利用研究综述[J].硅酸盐通报,2019(38):2842-2846.
[4]	OIKONOMOU N D.Recycled concrete aggregates[J].Cement& Concrete Composites,2005,27(2):315-318.
[5]	吕智英.混凝土再生骨料的研究动态与发展趋势[J].混凝土,2010(6):77-82.
[6]	赵海霞,解雅军.再生粗骨料不同取代率对混凝土工作性能及物理性能的影响[J].混凝土,2020(11):72-74.
[7]	陈宗平,占东辉,徐金俊.再生粗骨料含量对再生混凝土力学性能的影响分析[J].工业建筑,2015,45(1):130-135.
[8]	魏毅萌,柴军瑞,覃源,等.冻融循环下再生混凝土孔隙分布变化及其对抗冻性能的影响[J].硅酸盐通报,2018(37):825-830.
[9]	乔宏霞,彭宽,陈克凡,等.陶瓷粉再生混凝土冻融破坏可靠性分析[J].材料导报,2020(34):10035-10040.
[10]	周金枝,付甜甜,双子洋,等.氯盐浸泡下再生混凝土力学性能试验研究[J/OL].工业建筑:1-10[2022-05-11 ].http://kns.cnki.net/kcms/detail/11.2068.TU.20211014.1304.002.html.
[11]	王晨霞,张铎,曹芙波,等.冻融循环后再生混凝土的力学性能及损伤模型研究[J/OL].工业建筑:1-16[2022-05-11 ].http://kns.cnki.net/kcms/detail/11.2068.TU.20210629.1707.002.html.
[12]	LI H,ZHANG M,OU J.Flexural fatigue performance of concrete containing nano-particles for pavement[J].International Journal of Fatigue,2007,29:1292-1301.
[13]	李北星,尹立愿,樊立龙.机制砂混凝土抗弯曲疲劳性能研究[J].建筑材料学报,2017(20):801-807.
[14]	肖建庄,李宏,李龙.再生混凝土弯折疲劳性能[J].东南大学学报(自然科学版),2012,42(增刊2):340-345.
[15]	朱红兵,许永强,夏博,等.再生混凝土抗折疲劳试验断面破坏形态分析[J].工业建筑,2016,46(6):133-136.
[16]	ARORA S,SINGH S P.Probability of flexural fatigue failure of concrete made with recycled concrete aggregates[J].IOP Conference Series Materials Science and Engineering,2018,431:102004.https://doi.org/10.1088/1757-899X/431/10/102004
[17]	LUO X W,YAO H L.Experimental research on influence of loading method on dynamic behavior of recycled concrete[C]//International Conference on Manufacturing Science and Engineering (ICMSE 2011),Guilin:2011.
[18]	ARORA S,SINGH S P.Analysis of flexural fatigue failure of concrete made with 100% coarse recycled concrete aggregates[J].Construction and Building Materials,2016,102:782-791.
[19]	薛彦卿,丁锋,陈峰林,等.路用水泥混凝土疲劳损伤的可靠度分析[J].建筑材料学报,2014(17):1009-1014.