IMPACT RESISTANCE IMPROVEMENT OF REINFORCED CONCRETE BEAMS BY MIXING PVA SHORT FIBRE
This paper describes experimental investigation on the applicability of PVA shortfibre to improve impact resistance of port concrete structures,such as concrete caissons forbreakwaters. In the experiment,mechanical behaviour of reinforced concrete beams withPVA short fibre under repeated impact loads was examined by conducting falling-weightimpact loading tests. In the tests,PVA short fibre content and impact velocity were changedto investigate their influence on the impact behaviour. As the results,it was found that thenumber of repetition of impact loading until ultimate failure was greatly affected by theimpact velocity,and the effect was considerably changed between 2.0 m/s and 2.5 m/s. Also,it was made clear that the number of repetition of impact loading was increased in case ofconcrete beams reinforced with PVA short fibre. It was because that degradation of flexuralrigidity caused by repeated impact loading was mitigated by the existence of PVA short fibre.Accordingly,it was concluded that impact resistance of concrete beams could be improved bymixing PVA short fibre into concrete,showing the possibility of port concrete structures withhigher resistance against impulsive wave forces.
port structure reinforced concrete beam repeated impact load falling-weight impact loading test PVA short fibre
Mitsuyasu Iwanami Yuji Shirane Taku Matsubayashi Hiroshi Yokota
Port and Airport Research Institute,Yokosuka,Japan Maeda Corporation,Tokyo,Japan
国际会议
The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)
杭州
英文
804-809
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）