実構造物における収縮ひび割れ制御設計に関する研究

概要

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Shrinkage cracking controlling design scheme has been proposed by authors and allows us to estimate shrinkage cracking risk of planer R/C members constructed with regular concrete. This study focused to extend this scheme to involve shrinkage crack reducing concrete added expansive additive and shrinkage reducing admixture (NES, hereafter). This extension was achieved by modifying shrinkage restraint stress analysis model, in which recently developed creep model for NES was incorporated. The modified model was verified comparing with strain behavior of real slab members restrained by steel beams, with which the slab members' behavior was successfully reproduced. However, the model was found difficulty in predicting slab behavior constructed on soil foundation due to complexity in estimating restraint degree against the slabs. As an initial step to solve this problem, the restraint degree was analytically identified with the model for the first time.
社団法人日本建築学会の論文
2008-02-28