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Journal of the Korean Society of Hazard Mitigation 2015;15(4):147-154.
Published online August 31, 2015.
기계식 앵커시스템을 활용한 FRP 보강근의 장기성능에 대한 실험적 평가
오홍섭
An Experimental Verification on the Long-Term Performance of FRP Reinforcing Bars using Mechanical Anchorage System
Hongseob Oh
Abstract
This paper is dealt with an experimental results to examine the tensile strength, long-term performance such as the fatigue and tensile creep performance of GFRP and AFRP reinforcing bar. The anchorage method for test on the tensile and long-term performance was adopted with compression type mechanical anchorage system based on the ASTM specification. From the cyclic loading test on the AFRP and GFRP reinforcing bar, the fatigue endurance limit on the two million loading cycles of two different bars are almost 25% of initial tensile strength. The creep rupture test on GFRP bar was conducted and the creep rupture does not occur if sustained stress is limited to 55% of the short term strength.
Key Words: FRP; Fatigue limit; Fiber Reinforced Polymer; Mechanical anchorage; Tensile creep
요지
본 연구에서는 GFRP와 AFRP 보강근의 인장강도와 피로, 크리프와 같은 장기성능을 실험적으로 평가하였다. 인장 및 장기거동 평가 를 위하여 ASTM 기준을 적용한 압착형 앵커를 도입하여 실험을 수행하였다. AFRP와 GFRP보강근에 대한 피로실험 결과 두 보강근 의 200만회에 대한 피로한계는 약 정적강도의 25% 수준인 것으로 분석되었다. GFRP에 대한 크리프 실험을 수행하였으며, 실험결과 크리프에 대한 저항강도는 정적강도의 55%수준인 것으로 나타났다.
핵심용어: 피로한계; 기계적 정착; 인장 크리프


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