Study on Stress-strain Constitutive Relationship of Super-long-age Plastic Concrete under Triaxial Compression

5th Annual International Workshop on Materials Science and Engineering

Hu, Liangming^1 ; Zhu, Junfu^1 ; Jia, Xin^1 ; Zhang, Changhui^2 ; Gao, Danying^1

School of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou

450001, China^1

North China University of Water Resources and Electric Power, Zhengzhou

450045, China^2

关键词: Calculation formula;    Compressive stress strains;    Different confining pressures;    Engineering applications;    Fourth order polynomial;    Lateral confining pressure;    Stress-strain constitutive relationships;    Triaxial compression;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/585/1/012018/pdf
DOI  :  10.1088/1757-899X/585/1/012018

来源: IOP

【 摘 要 】

The triaxial stress-strain relationship of super long-aged (540d) plastic concrete mixed with clay and bentonite was studied. According to the test, the stress-strain curves of plastic concrete under different confining pressures are obtained. It is found that the stress-strain curves under the lateral confining pressure are basically the same (0.4 MPa, 0.6 MPa), (0.4 MPa, 0.8 MPa), and the slope of the rising section is basically the same. Compared with the peak pressure ratio (0.2 MPa, 0.4 MPa), the lateral confining pressure is larger. In addition, the calculation formula of the peak secant elastic modulus and the triaxial compressive stress-strain relationship in accordance with the lateral pressure of plastic concrete are also proposed. The fourth-order polynomial mathematical model. The establishment of the mathematical model provides a basis for the development of plastic concrete specifications and triaxial compression performance numerical analysis, and further promotes the engineering application of plastic concrete.