격자 스트럿-타이 모델 방법을 이용한 철근콘크리트 깊은 보의 극한강도 평가

Evaluation of Ultimate Strength of Reinforced Concrete Deep Beams Using Grid Strut-Tie Model Approach

Recently, many design codes including ACI 318-02 recommend the use of a strut-tie model approach for design of structural concrete with D-region(s). However, there are several unclear problems and shortcomings in the codes' strut-tie model approach. A grid strut-tie model approach was proposed to resolve these problems. In this study, the ultimate strengths of 17 deep beams, the most familiar type of D-regions, were evaluated for the validity check of the grid strut-tie model approach. The analytical results obtained by the approach are compared with those by the strut-tie model approach presented by CEB-FIP, AASHTO LRFD, and ACI 318-02.