open access

https://hdl.handle.net/2115/82096

RBSM based analysis on mechanical degradation of non-air entrained concrete under frost action - A general prediction with various water cement ratio, lowest temperatures and FTC numbers

英語

Simulation and modeling

2019-06-30

Elsevier

Construction and building materials

211

744-755

Frost action is one of the significant factors for deterioration of concrete structures in cold and wet regions. To evaluate the effects of freezing-thawing environment on the structural performance of reinforced concrete structures, it is important to know the degradation of concrete materials such as strength, stiffness, ductility, and so on. In order to investigate the mechanical behaviors of concrete under the effect of frost damage including deformation as well as strength, a two-dimensional mesoscopic Rigid Body Spring Model has been proposed previously. In current paper, a systematic study was conducted to simulate and analyze the frost-damaged concrete. Behavior under mechanical loading including uniaxial compression and tension is simulated on non-air-entrained concrete model after a full process of freezing-thawing cycles is simulated. The deteriorated properties such as compressive strength, tensile strength, elastic modulus, etc. are evaluated and parametric study is conducted. Then, a macroscale prediction model was proposed based on the mesoscale simulation results and it considered different environmental factors which varied among different laboratory experiments. The proposed model could predict the strength degradation in compression and tension of concrete with the number of FTCs which was also verified by numerous experimental results. Besides, pursuant to the existing constitutive models for non-damaged concrete, stress-strain relationships in compression and tension for frost-damaged concrete were developed according to the simulation results and several test data by mathematical regression. Satisfactory correlation was found through the comparisons between analytical and experimental results to show the applicability of the models in studying the structural performance of reinforced concrete structures.

学術雑誌論文

Accepted Manuscript

Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

© <2019>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

0950-0618