보강된 콘크리트 깊은 보의 스트럿-타이 모델 해석

Analysis of Strengthened Concrete Deep Beam Using Strut-Tie Model

In this paper, the strengthening analysis by strut-tie model for strengthened shear failed RC deep beam by the so-called the Steel Clamping Unit (SCU), which is a strengthening equipment, is carried out. The analysis considers the span-to-depth ratio, the existence of prestressing and stirrup, the shape of shear crack, and the strengthening position of the SCU. Based on analytical results, optimized strengthening analysis and design are carried out by investigating the behavior of the strengthened deep beams. The comparison between analytical results and experimental results shows that optimum strengthening effect by the SCU can be obtained when compressive strut zone created by SCU is away from major shear crack of the beam as far as possible.