Mechanical and Deformation Properties of Sulfate-attacked Concrete under Cyclic Loading and Unloading with Variable Amplitude

XUE Wei-pei; XU Wei; LIU Xiao-yuan; ZHANG Han-wen

doi:10.11988/ckyyb.20210412

PDF(1812 KB)

Journal of Changjiang River Scientific Research Institute ›› 2022, Vol. 39 ›› Issue (8) : 120-125. DOI: 10.11988/ckyyb.20210412

HYDRAULIC STRUCTURE AND MATERIAL

Mechanical and Deformation Properties of Sulfate-attacked Concrete under Cyclic Loading and Unloading with Variable Amplitude

XUE Wei-pei^1,2, XU Wei², LIU Xiao-yuan^2,3, ZHANG Han-wen²

Author information +

History +

Abstract

The mechanical and deformation properties under cyclic loading and unloading with variable amplitude are crucial for concrete structures under sulfate attack. The evolution of the mechanical properties,deformation properties and dissipation energy of concrete specimens under chemical erosion immersed in 10%,15% and 20% sodium sulfate solution for 5 and 7 months in advance was examined via uniaxial compression cyclic loading and unloading test with variable amplitude. Results demonstrated that with the increase of sodium sulfate concentration and erosion time,the strength of the specimen declined,and the number of cycles at failure decreased. The cumulative residual strain increased with the rising of loading strain,and such increment intensified continuously. The loading strain difference was always larger than the cumulative residual strain difference,but approached closer gradually with the proceeding of cyclic loading and unloading. The dynamic elastic modulus and plastic deformation rate both increased with the cyclic loading. The dissipated energy also increased with the cyclic loading,and especially boosted in the later stage.

Key words

concrete / sulfate attack / cyclic loading and unloading with variable amplitude / mechanical properties / deformation properties

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

XUE Wei-pei, XU Wei, LIU Xiao-yuan, ZHANG Han-wen. Mechanical and Deformation Properties of Sulfate-attacked Concrete under Cyclic Loading and Unloading with Variable Amplitude[J]. Journal of Changjiang River Scientific Research Institute. 2022, 39(8): 120-125 https://doi.org/10.11988/ckyyb.20210412

References

[1] 曹杰荣,金祖权,王鹏刚.海洋环境下混凝土的硫酸盐腐蚀机理[J].土木与环境工程学报,2019,41(1):104-109.
[2] 余雪峰,董玉文,王钢,等.复杂环境下粉煤灰混凝土抗硫酸盐侵蚀耐久性[J].混凝土,2020(6):58-60,69.
[3] NIE Y F,QIAN C X.Constitutive Relation of Sulfate Attacked Concrete Based on Uniaxial Loading[J].Advanced Materials Research,2010,168:50-56.
[4] SUN C,CHEN J,ZHU J,et al.A New Diffusion Model of Sulfate Ions in Concrete[J].Construction and Building Materials,2013,39:39-45.
[5] LIANG Y N,YUAN Y S.Constitutive Relation of Sulfate Attacked Concrete under Uniaxial Compression[J].Journal of Harbin Institute of Technology,2008,40(4):532-535.
[6] 李涛,朱鹏涛,张彬,等.硫酸盐侵蚀下混凝土内腐蚀反应-扩散过程的实验研究[J].硅酸盐通报,2020,39(1):50-55.
[7] 段德峰,黄显冲,王晓川.受硫酸盐腐蚀混凝土微观结构分析[J].四川建筑科学研究,2015,41(2):202-207.
[8] 张萌.硫酸盐腐蚀对混凝土微观结构特征的影响研究[J].硅酸盐通报,2020,39(4):1160-1165.
[9] 石星,万玲,邓涛,等.循环载荷作用下混凝土的压缩特性研究[J].地下空间与工程学报,2008(2):281-284.
[10] 王孝政,彭刚,罗曦,等.混凝土单轴循环加卸载试验及声发射特性[J].水利水运工程学报,2016(4):92-97.
[11] 胡海蛟,彭刚,谢玖杨,等.混凝土循环加卸载动态损伤特性研究[J].工程力学,2015,32(6):141-145.
[12] ZHENG Y S,THOMAS F,HEINZ K.Inhomogeneous Mechanical Behaviour of Concrete Subjected to Monotonic and Cyclic Loading[J].International Journal of Fatigue,2020,132,105383.
[13] 薛维培,刘晓媛,姚直书,等.不同损伤源对玄武岩纤维增强混凝土孔隙结构变化特征的影响[J].复合材料学报,2020,37(9):2285-2293.
[14] 刘晓媛.腐蚀环境下混凝土力学性能与微观特性研究[D].淮南:安徽理工大学,2020.
[15] 仇培涛.硫酸腐蚀下大孔隙混凝土孔隙结构和渗透性演化规律研究[D].徐州:中国矿业大学,2020.
[16] 杨荣周,徐颖,郑强强,等.分级等荷循环受压下橡胶砂浆的疲劳损伤演化[J].建筑材料学报,2021:1-12.[2021-07-26].http://kns.cnki.net/kcms/detail/31.1764.tu.20201118.1607.006.html.
[17] 陈学强,彭刚,胡伟华,等.混凝土在循环荷载下变形特性及加载曲线包络线的研究[J].长江科学院院报,2015,32(11):115-118.
[18] 冯萧,曹世荣,卓毓龙,等.块石胶结充填体循环加卸载损伤特性研究[J].有色金属工程,2016,6(6):82-86,95.
[19] 梁春华,熊鹏飞,姜袁.循环荷载下混凝土耗散能及塑性应变演化动态试验研究[J].中国农村水利水电,2019,11:177-180.
[20] 刘博文,彭刚,马小亮,等.不同侧应力状态下混凝土循环加卸载损伤特性[J].长江科学院院报,2017,34(11):121-125.
[21] 陈振华,梅世强,刘玲玲.循环荷载作用下混凝土残余应变特性[J].混凝土与水泥制品,2010(3):48-51.