Recently, most of concrete bridge deck in Two-Girder bridges have problem that transverse cracking has occurred. The Causes of Cracks in slabs of Two-Girder bridges are the mutual combination of several factors, such as concrete mix, the change in curvature due to the continuous pouring, heat of hydration, and plastic shrinkage. In this paper, Step-by-step analysis was carried out using the tensile stress of the concrete deck construction considering of the nodal temperature distribution, and the time and temperature of the upper plate of the material changes, the drying shrinkage, creep. distribution reinforcement bars in order to prevent the construction of the initial concrete cracking tensile stress share all this stress were examined. In this paper, investigation for crack causes were conducted to design and improvements were developed for future design through the analysis of concrete tensile stress.

• 이일용(한국도로공사 구조물처 차장) | Lee, il yong
• 서상길(한국도로공사 설계처 차장) | Seo, Sang Gil
• 이시환(한국도로공사 울산포항사업단 대리) | Lee Si Hwan