RC 구조물의 연성거동을 위한 최소철근비 결정에 대한 연구
The study of determination of minimum reinforcement ratio for ductile behaviour in RC structures
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Minimum reinforcement requirements should be based on gross section properties and contain that the yield moment be greater than the cracking moment. Those requirements are apparent when the effects of external forces and those of imposed deformations are examined separately, and the different nature of the structural response observed in these two instances is considered. Most codes for concrete structures have minimum reinforcement requirements for flexural members. Those requirements are intended to prevent excessive crack widths at service loads for aesthetic and durability reasons, and to tie the structure together and ensure that it acts as assumed in the design and to provide a ductile response and ensure adequate warning of an impending failure at overloads. For this study, we are to review each code requirement and then compare with the values of this requirement and the results of theoretical approach. In this study, we can be obtained following results. 1) The minimum area of reinforcement for external forces should be determined in considering the compressive strength of concrete. 2) For case where structural walls or large columns porvide significant restraints to imposed deformations, it may be necessary to increase the amount of reinforcement specified by code minimum requirements.