Damage Constitutive Model and Mechanical Performance Deterioration of Concrete under Sulfate Environment
Damage Constitutive Model and Mechanical Performance Deterioration of Concrete under Sulfate Environment
复制标题
硫酸盐环境下混凝土损伤本构模型及力学性能劣化
DOI：
10.1155/2020/3526590
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发表时间：
2020-03
影响因子：
--
通讯作者：
Lu Zhaohui
中科院分区：
文献类型：
--
作者：
Liu Peng;Chen Ying;Yu Zhiwu;Lu Zhaohui
研究了侵蚀方式、侵蚀龄期和硫酸盐溶液浓度对混凝土力学性能的影响。提出了基于随机性的混凝土应力-应变无量纲关系模型。研究了硫酸盐侵蚀下混凝土表面弹性模量和泊松比的变化规律，提出了用表面参数表征混凝土表面性能变化的新方法。结果表明，混凝土应力-应变的无量纲关系模型可以较好地表征混凝土力学性能的变化。硫酸盐侵蚀前后混凝土荷载-位移的差异反映在曲线斜率和极限承载力的变化上，混凝土表面横向和纵向应变曲线直线段的斜率也发生变化。在1%硫酸盐溶液和饱和硫酸盐溶液作用下，混凝土极限承载力的提高率分别约为30%和10%。而饱和硫酸盐溶液对混凝土极限承载力的破坏率约为25%。C20和C40混凝土表面弹性模量的损伤因子分别为0.185和-0.19。研究结果为研究硫酸盐环境下混凝土的应力-应变关系和力学性能的变化提供了依据。
The effects of erosion mode, erosion age, and concentration of sulfate solution on mechanical properties of concrete were investigated. The dimensionless relationship model of the stress-strain of concrete on the basis of randomness was proposed. The variation of the elasticity modulus and Poisson’s ratio of the concrete surface attacked by sulfate was studied, and a novel method of using a superficial parameter to characterize the performance change of the concrete surface was recommended. The results showed that the dimensionless relationship model of stress-strain of concrete could be used to represent the variations of mechanical properties of concrete. The differences of load-displacement of concrete before and after sulfate attack were reflected as the change of curve’s slope and ultimate bearing capacity, and the slope of a straight section of the lateral and longitudinal strain curves of concrete surface also varied. The increment rates of ultimate bearing capacity of concrete attacked by 1% and saturated sulfate solution were about 30% and 10%, respectively. However, the decreasing ratio of the ultimate bearing capacity of concrete attacked by saturated sulfate solution was approximately 25%. The damage factor of the elasticity modulus of the concrete surface of C20 and C40 was 0.185 and −0.19, respectively. The obtained results could provide a support for investigating the variations of stress-strain relationship and mechanical performance of concrete under a sulfate environment.
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影响因子：
7.4
作者：
Yingwu Zhou;Mali Li;L. Sui;F. Xing
通讯作者：
Yingwu Zhou;Mali Li;L. Sui;F. Xing
DOI：
10.4028/www.scientific.net/amr.168-170.50
发表时间：
2010-12
期刊：
Advanced Materials Research
影响因子：
--
作者：
Yanfeng Nie;Chunyu Qian
通讯作者：
Yanfeng Nie;Chunyu Qian
硫酸盐溶液浓度对混凝土劣化机理及物理性能的影响
影响因子：
7.4
作者：
Liu, Peng;Chen, Ying;Lu, Zhaohui
通讯作者：
Lu, Zhaohui
硫酸盐腐蚀改性混凝土的力学性能及使用寿命预测
影响因子：
1.8
作者：
Zhang, Min;Yang, Li-min;Chen, Hong-li
通讯作者：
Chen, Hong-li
影响因子：
7.4
作者：
Najjar, M. F.;Nehdi, M. L.;Azabi, T. M.
通讯作者：
Azabi, T. M.