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Heterogeneous Simulation on Concrete Shrinkage using Meso-model

메소모델을 사용한 비균질성을 고려한 콘크리트의 수축 해석

  • Received : 2019.08.01
  • Accepted : 2019.08.28
  • Published : 2019.09.01

Abstract

Shrinkage is one of typical characteristics of concrete with cement paste and aggregates. A lot of studies on this has been conducted with an assumption that the concrete is a homogeneous material. However, as shrinkage acts on only one of the components that consist of concrete, it is hard to be characterized only by the average effective properties. Therefore, in this paper, the concrete shrinkage, which is one of the typical characteristics and still has a lot of uncertainty, is simulated considering its heterogeneous properties. Using a meso model, concrete is modeled with the combination of mortar and aggregates, and the shrinkage is simulated by applying the shrinkage strain on the mortar only. According to the results, it is shown that the cracking of shrinking concrete is largely influenced by the types of aggregates and the degree of restraint. Also, the shrinkage cracking cannot be represented only by the single values such as tensile strength since the stiffness of aggregates and the degree of restraint influence the cracking.

Keywords

concrete shrinkage;meso model;heterogeneous material;degree of restraint

Acknowledgement

Supported by : 충남대학교

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