[1]寇佳亮,王栋,张晶,等.卤水-干湿侵蚀下HDC力学性能试验及损伤本构模型研究[J].自然灾害学报,2020,29(02):076-86.[doi:10.13577/j.jnd.2020.0208]
 KOU Jialiang,WANG Dong,ZHANG Jing,et al.Experimental study on mechanical property and damage constitutive model of high ductile concrete under brine erosion-dry and wet cycle[J].,2020,29(02):076-86.[doi:10.13577/j.jnd.2020.0208]
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卤水-干湿侵蚀下HDC力学性能试验及损伤本构模型研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
29
期数:
2020年02期
页码:
076-86
栏目:
出版日期:
2020-04-28

文章信息/Info

Title:
Experimental study on mechanical property and damage constitutive model of high ductile concrete under brine erosion-dry and wet cycle
作者:
寇佳亮12 王栋1 张晶1 张浩博12
1. 西安理工大学 土木建筑工程学院, 陕西 西安 710048;
2. 西安理工大学 省部共建西北旱区生态水利国家重点实验室, 陕西 西安 710048
Author(s):
KOU Jialiang12 WANG Dong1 ZHANG Jing1 ZHANG Haobo12
1. School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China;
2. State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
关键词:
高延性混凝土卤水侵蚀干湿循环力学性能本构模型
Keywords:
high ductile concrete (HDC)erosion of brinedrying and watering cyclemechanical propertiesconstitutive model
分类号:
TU528;TU37;X9
DOI:
10.13577/j.jnd.2020.0208
摘要:
为了研究卤水-干湿循环环境下高延性混凝土(HDC)单轴受压力学性能,以3种高浓度卤水溶液为侵蚀介质,对HDC共进行了195次干湿循环试验,分析了卤水与干湿循环共同作用对HDC抗压强度、抗折强度及应力-应变关系的影响。试验结果表明:HDC对卤水有较好的抗侵蚀能力,且破坏时的应变基本保持在(2.5~3.5)%,为延性破坏;在整个循环周期内,试件的质量均出现先降后升的现象,其中溶液3(15%Cl-+5%SO42-)中的HDC试件在150次循环后质量缓慢增长至94%;溶液3(15%Cl-+5%SO42-)中HDC抗压强度耐腐蚀系数和抗压强度下降幅度最大,分别为33.1%和50%;根据试验结果,推导出了化学损伤变量的表达式,进一步耦合力学损伤,引入耦合损伤变量D,建立了HDC在力学和化学损伤耦合作用下的弹塑性-化学损伤本构模型。
Abstract:
In order to study the uniaxial compression performance of high ductile concrete (HDC) in brine-dry and wet cycle environment,a total of 195 dry-wet cycles tests were carried out on HDC using three high-concentration brine solutions as the erosive medium.The effects of brine and dry-wet cycle on the compressive strength, flexural strength and stress-strain relationship of HDC were analyzed.The results showed that:HDC has a good resistance to brine,and the strain at the time of failure is basically maintained at (2.5~3.5)%, which is a ductile failure; During the entire cycle, the quality of the test specimens first decreased and then increased. The HDC test specimens in solution 3 (15%Cl-+5%SO42-) slowly increased to 94% in quality after 150 cycles;In solution 3 (15%Cl-+5%SO42-), the HDC compressive strength corrosion resistance coefficient and compressive strength decreased the most, respectively 33.1% and 50%;According to the test results, the expression of the chemical damage variable is derived, and the mechanical damage is further coupled, and the coupled damage variable D is introduced.An elastoplastic-chemical damage constitutive model of HDC under the coupling of mechanical and chemical damage was established.

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相似文献/References:

[1]寇佳亮,张亚茹,张晶.冻融循环后高延性混凝土疲劳性能试验及S-N曲线研究[J].自然灾害学报,2019,28(05):075.[doi:10.13577/j.jnd.2019.0509]
 KOU Jialiang,ZHANG Yaru,ZHANG Jing.Experimental study on fatigue property and S-N curve of high ductile fiber concrete under freeze-thaw cycles[J].,2019,28(02):075.[doi:10.13577/j.jnd.2019.0509]

备注/Memo

备注/Memo:
收稿日期:2019-05-24;改回日期:2019-08-22。
基金项目:国家自然科学基金项目(51408487);中国住建部科学技术项目(2014-K2-037);中国博士后科学基金第56批面上项目(2014M562437);陕西省博士后科学基金项目(2014M562437);西安理工大学科学研究计划项目(118-211403)
作者简介:寇佳亮(1979-),男,副教授,博士,从事高性能纤维混凝土力学性能研究.E-mail:jialiangkou0918@163.com
更新日期/Last Update: 1900-01-01