지지부 조건에 따른 유공형 판으로 전단보강된 넓은 보의 전단성능 평가

국문 초록 (Abstract)

본 논문은 유공형 판 형태로 전단 보강한 넓은 보의 중심에 기둥을 삽입하여 연속한 두 경간으로 설계하여 전단파괴 실험을 통해 넓은 보의 거동을 평가하였다. 유공형 강판으로 전단 보강된 시험체 5개와 유공형 GFRP판으로 보강된 시험체 3개 총 8개의 시험체를 전단파괴 실험을 통해 계측한 전단강도와 ACI-318 규준의 설계식을 통해 얻은 전단강도와 비교․평가하였다. 또한 넓은 보의 지지부 폭, 지지부의 형상과 전단보강재의 재료를 변수로 하여 넓은 보의 전단강도에 미치는 영향을 분석하였다. 이를 통해 지지부 폭이 증가할수록 전단강도가 증가하고 하중의 집중을 방지하는 것을 확인하였다. 또한 전단보강재의 재료인 강재와 GFRP에 상관없이 전단보강량이 동일하다면 넓은 보에서 비슷한 전단보강효과를 보이는 것을 확인하였다.

다국어 초록 (Multilingual Abstract)

In this paper, shear performance of concrete wide beams was evaluated through shear failure tests. The specimens were designed to have two continuous spans with a column at the center of the wide beam. Also the specimens were reinforced with plates with openings as shear reinforcements. For the test, total eight specimens, including five specimens were reinforced with steel plates and the other three specimens were reinforced with GFRP plates were manufactured. And the shear strengths obtained from the tests were compared with ones from the equation provided by ACI 318. Support width of wide beam, support section of wide beam and shear reinforcement material were considered as variables. The results showed that the support width was proportional to the increase of shear strength. Also, regardless of material type of shear reinforcement, the shear reinforcing effect was similar when the amount of shear reinforcement was the same.

참고문헌 (Reference)

1 최진웅, "유공형 강판으로 전단보강된 넓은 보에서의 횡방향 보강 간격에 따른 전단성능 평가" 한국전산구조공학회 28 (28): 259-266, 2015

2 Shuraim, A.B., "Transverse Stirrup Configurations in RC Wide Shallow Beams Supported on Narrow Columns" 138 (138): 416-424, 2012

3 Lubell, A.S., "One-Way Shear in Wide Concrete Beams with Narrow Supports" 2008

4 "KS F 2405 Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens"

5 Korea Concrete Institute, "Concrete Design Code and Commentary(KCI-12)" Kimoondang Publishing Company 2012

6 Kim, D-J., "Concrete Beams with Fiber-Reinforced Polymer Shear Reinforcement" 111 (111): 903-912, 2014

7 "ACI Committee 440.1R-06 for the Design and Construction of Concrete Reinforced with FRP Bars (ACI 440.1R-06), American Concrete Institute"

8 "ACI Committee 318-14 Building Code Requirement for Reinforced Concrete and Commentary (ACI 318-14), American Concrete Institute"