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철근콘크리트 깊은 보의 극한전단강도 예측에 관한 해석적 연구
손강혁,홍기섭,홍영균 대한건축학회 2001 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.21 No.2
This study is focusing on an analytical study of ultimate shear strength prediction of the reinforced concrete deep beam. Theoretical analysis method of deep beam is not fixed yet because of material's nonlinear feature and discontinuous stress distribution. Recently, to improve this problems, strut-tie model ,plastic theory and nonlinear FEM using equivalent Truss model method are widely used. Many researchers have been trying to examine ultimate shear strength prediction. However, their solutions are not easy to apply in actual manner. In this study, based on experiment data about simple support reinforced concrete deep beam, an ultimate shear strength equation which consider splitting strength of concrete, a/d, and web reinforcement ratio as variables is proposed.
洪起燮,孫剛赫 홍익대학교환경개발연구원 2001 환경개발연구논문집 Vol.6 No.-
Spring network models are being developed to facilitate the analysis and design of structural concrete components and systems. Concrete is represented by rigid particles which are inter-connected by elastic springs. Spring fracture equates to discrete cracking along the particles boundaries. The network geometry is defined by the Voronoi diagram associated with a randomly generated set of points (i.e. nuclei of the Voronoi cells.) These nuclei define the computational degrees of freedom and are distributed so as to maximize isotropy with respect to potential crack direction A novel method is given for calculating stresses in th rigid-particles-spring network. Reinforcement is modeled discretely and can be positioned in the structural model irrespective of the local geometrical features of the network. Concrete-reinforcement interfacial behavior is lumped into nonlinear links positioned along the reinforcing components. Network generation, the positioning of reinforcing components and links, and the assignment of linkage properties are all highly automated. The practicality of this approach is demonstrated through analyses of reinforced concrete deep beam.