Constitutive Relation of Sulfate Attacked Concrete Based on Uniaxial Loading
Constitutive Relation of Sulfate Attacked Concrete Based on Uniaxial Loading
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DOI：
10.4028/www.scientific.net/amr.168-170.50
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发表时间：
2010-12
期刊：
影响因子：
--
通讯作者：
Yanfeng Nie;Chunyu Qian
中科院分区：
文献类型：
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作者：
Yanfeng Nie;Chunyu Qian
本文采用室内加速劣化试验技术，对硫酸盐和硫酸盐-氯化物复合侵蚀混凝土的应力-应变全过程曲线进行了试验研究。针对实际工程应用，研究了一种超声无损检测(NDT)技术来估计损伤程度。这些曲线与结构设计规范中建议的混凝土方程形式相同，但具有不同的特征点系数和值。得到了硫酸盐侵蚀混凝土的腐蚀损伤与应力应变关系、本构参数、特征值等一系列力学参数的解析表达式，可直接用于硫酸盐侵蚀混凝土结构的理论和数值分析以及实际工程检测与评估。
In this paper, the whole stress-strain curve of concrete attacked by sulfate and sulfate-chloride compound were investigated experimentally by an accelerated deterioration laboratory technique. For practical engineering applications, special attention of research was devoted to an ultrasonic nondestructive test (NDT) technique to estimate the damage extent. The curves were fitted very well with the same form of equations for the concrete suggested in the structure design code, but with different coefficients and value of feature points. Aanlytical expressions between the corrosion damage of concrete attacked by sulfate and the stress-strain relationship, constitutive parameters, value of character ponits,a series of mechanics parameters are achieved, which can be directly used in theoretical and numerical analysis as well as practical engineering detection and assessment of concrete structures attacked by sulfate.