長期設計荷重下におけるRC造スラブの鉄筋の抜出しに関する解析的研究

概要

論文の詳細を見る
As one of the factors which influence long-term deflections on reinforced concrete slabs after being cracked, the slippage of tension steel at fixed edges has been generally accepted. From previously published test data, it is obvious that the influence on the slippage of tension steel is so large that it can not be disregared when compared with the influence on creep and shrinkage of concrete. However, a method for the quantitative estimation on the change of slippage of tension steel with time is still not clear. In this paper, the formulation is shown on the basis of bond stress-relative slippage relation and then the validity of this formulation is examined by comparing analayzed results with experimental results. Finally, even though equations solved by elastic analysis are used as the equation for the calculation of the slippage of tension steel under sustained design loading, it is shown that the analyzed results which are given by these equations are sufficiently useful for structural design when the results of elastic analysis are compared with the results of elastic-plastic analysis. Furthermore, it is shown that L=35 d may be used as the anchorage length in the case of utilizing a calculated equation for the slippage of tension steel on pull-out specimens.
社団法人日本建築学会の論文
1989-06-30