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Title |
Direct Inelastic Design of Reinforced Concrete Members Using Strut-and-Tie Model
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Keywords |
스트럿-타이 모델 ; 할선강성 ; 비탄성 설계 ; 변형 능력 ; 철근콘크리트 strut-and-tie model ; secant stiffness ; inelastic design ; deformability ; reinforced concrete |
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Abstract |
In the previous study, direct inelastic strut-and-tie model (DISTM) was developed to perform inelastic design of reinforced concrete members by using linear analysis for their secant stiffness. In the present study, for convenience in design practice, the DISTM was further simplified so that inelastic design of reinforced concrete members can be performed by a run of linear analysis, without using iterative calculations. In the simplified direct inelastic strut-and-tie model (S-DISTM), a reinforced concrete member is idealized with compression strut of concrete and tension tie of reinforcing bars. For the strut and tie elements, elastic stiffness or secant stiffness is used according to the design strategy intended by engineer. To define the failure criteria of the strut and tie elements, concretecrushing and reinforcing bar fracture were considered. The proposed method was applied to inelastic design of various reinforced concrete members including deep beam, coupling beam, and shear wall. The design results were compared with the properties and the deformation capacities of the test specimens.
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