高強度繊維補強モルタルの破壊特性に及ぼす載荷速度の影響
1998 年 63 巻 514 号 p. 15-20
詳細
1998 年 63 巻 514 号 p. 15-20
The influence of loading speed on the fracture properties of fiber reinforced mortar was investigated. Three-point bending tests on pre-notched beam specimen were performed under the four different loading speed conditions. Fracture parameters of specimen were analyzed based on the poly-linear approximation analysis of tension softening diagram by using the data of a load-load point displacement curve. The fracture energy of specimen was significantly improved by mixing short cut fibers in mortar matrix. The fracture energy and the maximum load increase at the high loading speed condition and this is conspicuous in the case of the fiber reinforced mortar. The reason of this loading effect is considered that the high loading speed causes the increase of crack resistance in the fracture process zone of specimen.
