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NSM기법으로 CFRP-Strip을 보강한 RC보의 RBSN해석
한상훈 ( Sang Hoon Han ),임진묵 ( Jin Mook Lim ),홍기남 ( Ki Nam Hong ) 충북대학교 건설기술연구소 2010 建設技術論文集 Vol.29 No.1
This paper presents a simple and efficient two-dimensional rigid-body-spring network model able to accurately estimate the fractural behavior of reinforced concrete structure. The proposed rigid-body-spring network model, denoted as RBSN model, considers CFRP reinforcing materials using the beam elements and link spring elements. The RBSN method is able to model collapse due to concrete crushing. The RBSN model is used to predict the applied load-midspan deflection response of RC beams strengthened CFRP-strip subjected to the four-point bending. Numerical simulation and experimental measurement are compared to based on tests available in the literature. The numerically simulated responses agree significantly with the corresponding experimental result until the maximum load. However, It should be mentioned that, in order to more accurately predict the post-peak flexural behavior of RC beams strengthened CFRP-strip, development of the advanced model to simulate the fracture model of concrete in compression is required.