Abstract
This paper presents a study that attempted to improve the site applicability of profile sheets and check the effects of bending reinforcement in composite profiled beams, and consequently, to suggest an improved modular-type CB2 and two types of bending reinforcement methods. As a result of the reinforcing and reforming modular profiled beam experiment conducted, CBIIshowed an adequate deformation capacity as well as a sufficient plastic plateau at the maximum load and thereafter. For all the specimens, an insignificant modular slip occurred while linear relations were kept constant, at up to approximately 50% of the maximum load and at constant linear relations. The experimental values were very low. Probably, due to the small-scale experiment, the area of the concrete for the concrete filling and covering might have been insufficient, which might have led to the failure to improve the strength. Comparing the results with the standard design stress, all the specimens-except for T16 and B16-indicated more than 0.9. Based on the standard design stress, the reinforced modular profiled beam was consideredto have positive applicability.
본 논문은 본 연구자가 기존에 발표한 모듈단면 프로파일보를 개선하여 새로운 모듈을 제안하였으며 이를 바탕으로 휨보강을 실시하여 적절한 휨보강 방법을 제시하고자 하였다. 개선된 모듈은 기존의 모듈보다 향상된 내력 및 초기강성을 나타냈다. 휨보강은 T형 단면 강재와 철근을 이용하여 실시하였으며 실험결과 철근을 이용하여 휨보강을 실시하는 것이 우수한 것으로 나타났다. 휨내력은 재료 실험결과를 바탕으로 이론값과 비교하면 저조한 결과를 나타냈으나 재료의 설계기준강도를 이용하면 90%정도의 내력을 나타내 향후 T형보를 이용한 압축측 보강이 이루어진다면 모듈단면 프로파일보의 적용가능성은 충분하다고 판단된다.
