鉄筋コンクリート構造物の施工荷重による損傷の防止 : コンクリートの強度変動に基づいた信頼性施工

抄録

This paper explains how to determine the reliability of reinforced concrete structures with respect to structural damage such as occurrence of cracking and excess deflections during construction, which affect their serviceability significantly after construction. Occurrence of cracking and excess deflections are affected by the variation in the strength of concrete, Young's modulus, and supporting systems. Effects of these variables on load distributions and variations were studied using Monte Carlo technique for random simulation. Results of this study indicate that variability of Young's modulus have a significant influence both on the load variability and deformations. The coefficient of variation of load distribution during construction is less than 10 % and that of creep deflections during construction is more than 20 %. From the coefficient of variation of load distribution and the coefficient of variation of rupture of concrete, a diagram for determining the reliability of reinforced concrete structures against occurrence of cracking during construction was made.