高温作用后混凝土的动态轴拉力学性能研究_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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高温作用后混凝土的动态轴拉力学性能研究

Study on dynamic axial tensile properties of concrete subjected to high temperature

2024年第2期

高温；混凝土；轴拉力学性能；往复加载；损伤模型

High temperature; Concrete; Axial tension property; Reciprocating loading; Damage model

2024年第2期

10.19761/j.1000-4637.2023.02.018.07

蒋奇勇，陈平

中国电建集团华东勘测设计研究院有限公司，浙江杭州 311100

蒋奇勇，陈平

蒋奇勇,陈平.高温作用后混凝土的动态轴拉力学性能研究[J].混凝土与水泥制品,2024(2):18-23,27.

JIANG Q Y,CHEN P.Study on dynamic axial tensile properties of concrete subjected to high temperature[J].China Concrete and Cement Products,2024(2):18-23,27.

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摘要：进行了高温作用后混凝土的单调拉伸和往复拉伸试验，分析了其主要力学特征参数（抗拉强度、初始弹性模量、峰值应变、残余应变、割线模量等）的温度效应和应变率效应。采用混凝土损伤模型，引入温度参数，提出了基于应变率效应和温度效应的混凝土加卸载模型，验证了模型的适用性。结果表明：混凝土的抗拉强度及初始弹性模量随着温度的升高而降低，峰值应变随着温度的升高而增大，残余应变累积与温度无关，而随应变率的增大而累积速率加快；混凝土卸载曲线的非线性程度与应变率呈正相关，与温度无明显关系；混凝土再加载曲线的非线性程度与温度呈正相关，与应变率无明显关系；通过对比得出，所提出的模型计算结果与实测结果吻合程度较好。 Abstract: The monotonic and reciprocating tensile tests of concrete after high temperature were carried out, and the temperature and strain rate effects of the main mechanical characteristic parameters of concrete (including tensile strength, initial elastic modulus, peak strain, residual strain, secant modulus, etc.) were analyzed. A concrete loading and unloading model based on strain rate effect and temperature effect was proposed by using the existing concrete damage model, and the applicability of the model was verified. The results show that the tensile strength and initial elastic modulus of concrete decrease with the increase of temperature. The peak strain increases with the increase of temperature, the accumulation of residual strain is independent of temperature, and the accumulation rate increases with the increase of strain rate. The nonlinearity of concrete unloading curve is positively related to strain rate, but has no obvious relationship with temperature. The nonlinearity of the concrete reloading curve is positively correlated with temperature, but has no obvious relationship with strain rate. By comparing the calculated results of the model with the measured results, the proposed model is in good agreement with the measured results.

英文名 : Study on dynamic axial tensile properties of concrete subjected to high temperature

刊期 : 2024年第2期

关键词 : 高温；混凝土；轴拉力学性能；往复加载；损伤模型

Key words : High temperature; Concrete; Axial tension property; Reciprocating loading; Damage model

刊期 : 2024年第2期

DOI : 10.19761/j.1000-4637.2023.02.018.07

文章编号 :

基金项目 :

作者 : 蒋奇勇，陈平

单位 : 中国电建集团华东勘测设计研究院有限公司，浙江杭州 311100

蒋奇勇，陈平

蒋奇勇,陈平.高温作用后混凝土的动态轴拉力学性能研究[J].混凝土与水泥制品,2024(2):18-23,27.

JIANG Q Y,CHEN P.Study on dynamic axial tensile properties of concrete subjected to high temperature[J].China Concrete and Cement Products,2024(2):18-23,27.

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摘要

参数

结论

参考文献

引用本文

Abstract: The monotonic and reciprocating tensile tests of concrete after high temperature were carried out, and the temperature and strain rate effects of the main mechanical characteristic parameters of concrete (including tensile strength, initial elastic modulus, peak strain, residual strain, secant modulus, etc.) were analyzed. A concrete loading and unloading model based on strain rate effect and temperature effect was proposed by using the existing concrete damage model, and the applicability of the model was verified. The results show that the tensile strength and initial elastic modulus of concrete decrease with the increase of temperature. The peak strain increases with the increase of temperature, the accumulation of residual strain is independent of temperature, and the accumulation rate increases with the increase of strain rate. The nonlinearity of concrete unloading curve is positively related to strain rate, but has no obvious relationship with temperature. The nonlinearity of the concrete reloading curve is positively correlated with temperature, but has no obvious relationship with strain rate. By comparing the calculated results of the model with the measured results, the proposed model is in good agreement with the measured results.

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[1] 周欢.水利工程高性能混凝土高温劣化试验研究[J].广西水利水电,2022(5):15-18.
[2] 毛振豪,马乾坤,张继承.等.活性粉末混凝土高温后强度退化规律试验研究[J].硅酸盐通报,2022,41(12):4245-4253.
[3] 刘淑钰,苗艳春,李明厚,等.高温后再生保温混凝土损伤劣化数值分析[J/OL].太原理工大学学报,2022(10):1-14[2023-09
-19].http://kns.cnki.net/kcms/detail/14.1220.N.20221014.1614.0
02.html.
[4] 李敏,钱春香,王珩,等.高强混凝土受火后力学性能变化规律的研究[J].硅酸盐学报,2003,31(11):1116-1120.
[5] 于跟社,邓宗才,王珏,等.玄武岩纤维高性能混凝土轴拉和抗冲击韧性试验研究[J].混凝土与水泥制品,2022(3):56-60.
[6] 王利平,杨卫忠.混凝土轴心受拉全曲线试验的新方法[J].混凝土与水泥制品,2018(8):29-32.
[7] 陈森,李浩,王振,等.持续高温条件下重混凝土劣化行为研究[J/OL].混凝土与水泥制品,2023(9):1-5[2023-09-19].http://kns.cnki.net/kcms/detail/32.1173.TU.20230905.1535.004.html.
[8] 杨倩,贾恒瑞,陈宗平.火灾高温后混凝土剩余强度及本构方程研究[J].混凝土与水泥制品,2022(3):28-33.
[9] BALENDRAN R V,MARTIN-BUADES W H.The influence of high temperature curing on the compressive, tensile and flexural strength of pulverized fuel ash concrete[J].Building and Environment,2000,35(5):415-423.
[10] 胡翠平,徐玉野,罗漪,等.高温作用后混凝土抗拉强度的影响分析[J].华侨大学学报(自然科学版),2014,35(2):196-201.
[11] YANKELEVSKY D Z,REINHARDT H W. Uniaxial behavior of concrete in cyclic tension[J].Journal of Structural Engineering,1989,115(1):166-182.

[12] GOPALARATMAN V S,SHAH S P.Softening response of plain concrete in direct tension[J].ACI Materials Journal,1985,82(3):310-323.
[13] CHEN X,BU J,FAN X,et al.Effect of loading frequency and stress level on low cycle fatigue behavior of plain concrete in direct tension[J].Construction and Building Materials,2017,133:367-375.
[14] ASTM.Standard specification for concrete aggregates:ASTM C33-08[S].West Conshohocken:ASTM,2004.
[15] PIASTA J,SAWICZ Z,RUDZINSKI L.Changes in the structure of hardened cement paste due to high temperature[J].Matériauxet Construction,1984,17(4):291-296.
[16] MORSY M S,AL-SALLOUM Y A,ABBAS H,et al.Behavior of blended cement mortars containing nano-metakaolin at elevated temperatures[J].Construction and Building Materials,2012,35:900-905.
[17] PENG G F,HUANG Z S.Change in microstructure of hardened cement paste subjected to elevated temperatures[J].Construction and Building Materials,2008,22(4):593-599.
[18] SPOONER D C,DOUGILL J W.A quantitative assessment of damage sustained in concrete during compressive loading[J].Magazine of Concrete Research,1975,27(92):151-160.
[19] SPOONER D C,YOUNG A G,DOUGILL J W.A quantitative assessment of damage sustained in concrete during compressive loading[J].Magazine of Concrete Research,1976,28(96):168-169.

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