A STUDY ON ISSUES WITH THERMAL CRACK VERIFICATION METHOD AND IMPROVING IT BASED ON PROBABILITY THEORY

Abstract

 The thermal crack verification in the civil engineering field is generally carried out using the relationship diagram between crack index and crack occurrence probability shown in the concrete standard specifications. In this paper, we have clarified the issues by considering the original meaning of this diagram from a probabilistic perspective and investigating the changes in its revision. It was shown that the tensile stress and strength are normally distributed, and the crack occurrence probability is expressed as a function with the coefficient of variation and the crack index as parameters. It was shown that the new crack verification method proposed using this calculation formula makes it possible to evaluate high-quality construction management conditions that could not be evaluated with conventional crack countermeasures, and a new countermeasure system that controls the coefficient of variation.