超高強度コンクリートのプレテンション部材への適用性に関する基礎的研究

概要

論文の詳細を見る
Ultra-high-strength concrete (UHSC) with compressive strength of 150 N/mm^2 makes it possible to reduce the weight of prestressed concrete structures. Particularly in case that UHSC is applied to pretensioned members, high bond strength can also be expected to reduce the transfer length. Considerable autogenous shrinkage of UHSC, however, reduces effective prestress and causes cracking due to the restraint of reinforcing steel. A new type UHSC with less autogenous shrinkage was developed, and its basic characteristics were investigated. Prestressing tests parameterizing the type of prestressing steel and the amount of introduced stress were also conducted to determine transfer length and to verify the effect of reduced autogenous shrinkage. Furthermore the predictability of effective prestress considering shrinkage and creep strain was studied.
社団法人日本材料学会の論文
2004-06-15