[1]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.[doi:10.11830/ISSN.1000-5013.2014.02.0196]
　HU Cui-ping,XU Yu-ye,LUO Yi,et al.Experimental Study on the Tensile Strength of Concrete after High Temperature[J].Journal of Huaqiao University(Natural Science),2014,35(2):196-201.[doi:10.11830/ISSN.1000-5013.2014.02.0196]
点击复制

高温作用后混凝土抗拉强度的影响分析()
分享到：

《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第35卷
期数:
2014年第2期
页码:
196-201
栏目:
出版日期:
2014-03-20

文章信息/Info

Title:
Experimental Study on the Tensile Strength of Concrete after High Temperature
文章编号:
1000-5013(2014)02-0196-06
作者:
胡翠平1;  徐玉野1;  罗漪1;  郑涌林1;  林碧兰2
1. 华侨大学 土木工程学院, 福建 厦门 361021;2. 厦门理工学院 材料科学与工程学院, 福建 厦门 361021
Author(s):
HU Cui-ping1;  XU Yu-ye1;  LUO Yi1;  ZHENG Yong-lin1;  LIN Bi-lan2
1. College of Civil Engineering, Huaqiao University, Xiamen 361021, China; 2. School of Material Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
关键词:
混凝土;  抗拉强度;  劈裂断面;  高温;  冷却方式
Keywords:
concrete;  tensile strength;  splitting section;  high temperature;  cooling mode
分类号:
TU528
DOI:
10.11830/ISSN.1000-5013.2014.02.0196
文献标志码:
A
摘要:
对62组混凝土标准立方体试块进行劈裂抗拉强度试验,考察受火温度、冷却方式、养护龄期及静置时间对高温作用后混凝土劈裂断面形态和抗拉强度的影响规律,并针对不同情况建议了高温作用后混凝土抗拉强度的计算式.结果表明:受火温度对高温作用后混凝土劈裂断面的破坏形态和抗拉强度影响很大.当受火温度在300 ℃以内时,劈裂断面较为平整;随着受火温度的提高,劈裂断面越来越粗糙,当受火温度超过600 ℃时,劈裂断面主要经过硬化水泥浆,断面处粗骨料未发生破坏.喷水冷却后,高温作用后混凝土的抗拉强度总体上比自然冷却后的低.养护龄期
Abstract:
The splitting tensile strength of 62 groups of concrete standard cubic specimens was investigated. The effects of temperature, cooling mode, curing age and standing time on the failure pattern of splitting section and the tensile strength of concrete were discussed, and the related calculation formula of the tensile strength was proposed in different conditions. The results show that there is a great influence of temperature on splitting sectional failure pattern and tensile strength of concrete. The splitting section is smooth at the temperature <300℃, and becomes rougher at higher temperature. When the temperature exceeds 600℃, the splitting occurs at the edge of coarse aggregates which are nearly undamaged. The tensile strength of the concrete after fire with spray cooling is smaller than that with natural cooling. The shorter the curing age is, the lower the tensile strength of the concrete after fire. With an increase in standing time, the tensile strength of the concrete after fire decreases initially and then increases, the minimum strength locates at 28 days standing time.

参考文献/References:

[1] 林燕卿,徐玉野,杨清文,等.火灾后混凝土短柱的滞回性能和损伤评定[J].华侨大学学报:自然科学版,2013,34(5):563-569.
[2] CHANG Y F,CHEN Y H,SHEU M S,et al.Residual stress-strain relationship for concrete after exposure to high temperatures[J].Cement and Concrete Research,2006,36(10):1999-2005.
[3] DIMIA M S,GUENFOUD M,GERNAY T,et al.Collapse of concrete columns during and after the cooling phase of a fire[J].Journal of Fire Protection Engineering,2011,21(4):245-263.
[4] 吴红翠,王全凤,徐玉野.HRB500级高强钢筋高温后的力学性能试验[J].华侨大学学报:自然科学版,2009,30(4):432-435.
[5] 中华人民共和国住房与城乡建设部.GB 50010-2010 混凝土结构设计规范[S].北京:中国建筑工业出版社,2010:34-97.
[6] 徐彧,徐志胜.高温作用后混凝土强度试验研究[J].混凝土,2000(2):44-45,53.
[7] 项凯,余江滔,陆洲导.多因素影响下高温后混凝土劈裂抗拉强度试验[J].武汉理工大学学报,2008,30(10):51-55.
[8] 谢狄敏,钱在兹.高温作用后混凝土抗拉强度与粘结强度的试验研究[J].浙江大学学报:自然科学版,1998,32(5):598-602.
[9] 王峥,宋玉普.高温对混凝土抗拉强度与黏结强度影响的试验研究[J].混凝土,2010(8):51-53.
[10] 覃丽坤,宋玉普,王玉杰,等.高温对混凝土力学性能影响的试验研究[J].混凝土,2004(5):9-11.
[11] 余江滔,夏敏,陆洲导.受火(高温)后混凝土的随机损伤本构关系[J].同济大学学报:自然科学版,2011,39(2):158-165.
[12] 吕天启,赵国藩,林志伸.高温后静置混凝土力学性能试验研究[J].建筑结构学报,2004,25(1):63-70.
[13] 中华人民共和国建设部.GB 50081-2002 普通混凝土力学性能试验方法标准[S].北京:中国建筑工业出版社,2002:19-20.
[14] 吕天启,赵国藩,林志伸,等.高温后静置混凝土的微观分析[J].建筑材料学报,2003,6(2):135-141.
[15] 朱玛,徐志胜,徐彧.高温后混凝土强度试验研究[J].湘潭矿业学院学报,2000,15(2):70-72.

相似文献/References:

[1]曾家民.混凝土碳化对钢筋锈蚀的影响及防护措施探讨[J].华侨大学学报(自然科学版),1994,15(1):58.[doi:10.11830/ISSN.1000-5013.1994.01.0058]
　Zeng Jiamin.Effects of the Carbonization of Concrete on the Corrosion of Reinforcing Steel and Its Protective Measures[J].Journal of Huaqiao University(Natural Science),1994,15(2):58.[doi:10.11830/ISSN.1000-5013.1994.01.0058]
[2]肖棋,江开勇.熔融沉积快速成形工艺材料粘结质量分析[J].华侨大学学报(自然科学版),1999,20(4):387.[doi:10.11830/ISSN.1000-5013.1999.04.0387]
　Xiao Qi,Jiang Kaiyong.Bonding Quality of Materials Fastly Modeling by Fused Deposition[J].Journal of Huaqiao University(Natural Science),1999,20(2):387.[doi:10.11830/ISSN.1000-5013.1999.04.0387]
[3]叶青,曾志兴.提高混凝土强度的技术经济分析[J].华侨大学学报(自然科学版),2002,23(1):56.[doi:10.3969/j.issn.1000-5013.2002.01.013]
　Ye Qing,Zeng Zhixing.Technical and Economical Analysis of Concrete for Promoting Its Strength[J].Journal of Huaqiao University(Natural Science),2002,23(2):56.[doi:10.3969/j.issn.1000-5013.2002.01.013]
[4]李浩,施养杭.混凝土碳化深度预测模型的比对与分析[J].华侨大学学报(自然科学版),2007,28(2):192.[doi:10.3969/j.issn.1000-5013.2007.02.021]
　LI Hao,SHI Yang-hang.Discussion of Concrete Carbonation Depth Predictive Models[J].Journal of Huaqiao University(Natural Science),2007,28(2):192.[doi:10.3969/j.issn.1000-5013.2007.02.021]
[5]徐玉野,王全凤,罗漪.混凝土矩形柱的耐火极限分析及实用计算[J].华侨大学学报(自然科学版),2008,29(2):284.[doi:10.11830/ISSN.1000-5013.2008.02.0284]
　XU Yu-ye,WANG Quan-feng,LUO Yi.Analysis and Practical Calculation for the Fire Resistance of Concrete Columns with Rectangular Cross Section[J].Journal of Huaqiao University(Natural Science),2008,29(2):284.[doi:10.11830/ISSN.1000-5013.2008.02.0284]
[6]施养杭,李浩.混凝土结构碳化寿命可靠度分析[J].华侨大学学报(自然科学版),2008,29(4):600.[doi:10.11830/ISSN.1000-5013.2008.04.0600]
　SHI Yang-hang,LI Hao.Reliability Analysis on Life of Carbonized Concrete Structure[J].Journal of Huaqiao University(Natural Science),2008,29(2):600.[doi:10.11830/ISSN.1000-5013.2008.04.0600]
[7]杨清文,徐玉野,郑涌林,等.含钢率对混凝土截面温度场分布的影响[J].华侨大学学报(自然科学版),2012,33(1):89.[doi:10.11830/ISSN.1000-5013.2012.01.0089]
　YANG Qing-wen,XU Yu-ye,ZHENG Yong-lin,et al.Influence of Steel Ratio on the Temperature Field Distribution of Concrete Section[J].Journal of Huaqiao University(Natural Science),2012,33(2):89.[doi:10.11830/ISSN.1000-5013.2012.01.0089]
[8]刘阳,郭子雄,杜耀峰.带粉刷层混凝土试块高温后抗压性能试验及数值模拟[J].华侨大学学报(自然科学版),2012,33(3):304.[doi:10.11830/ISSN.1000-5013.2012.03.0304]
　LIU Yang,GUO Zi-xiong,DU Yao-feng.Experimental Study and Numerical Simulation on the Compressive Behavior of Concrete Cubes with Mortar Cover after Exposure to Fire[J].Journal of Huaqiao University(Natural Science),2012,33(2):304.[doi:10.11830/ISSN.1000-5013.2012.03.0304]

备注/Memo

备注/Memo:
收稿日期: 2013-09-09
通信作者: 徐玉野(1978-),男,副教授,主要从事结构抗火的研究.E-mail:yuyexu@hqu.edu.cn.
基金项目: 国家自然科学基金资助项目(50908091); 中央高校基本科研业务费专项基金资助(JB-SJ1011); 福建省自然科学基金面上资助项目(2012J01221, 2012J05099); 福建省高等学校新世纪优秀人才支持计划项目(11FJRC03); 福建省厦门市科技计划项目(3502Z20133022)
更新日期/Last Update: 2014-03-20