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김시윤 ( Kim Si Yun ),김승직 ( Kim Sung Jig ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.2
Many of recent field observations and researches have been shown that axial force variation due to vertical ground motion can affect the shear capacityRC column . However, the majority of shear strength models of RC columns in current design codes and predictive approaches have been developed based on experiments with constant axial loads. Thus, this paper evaluates the experimental seismic performance of RC columns subjected to varying axial loads. The axial loading patterns included constant and variable loading considering the characteristic of overturning moment and vertical ground motion. The observations of experimental results, including the effect on shear strength, and ductility are discussed compared with the case of constant axial load.
김시윤 ( Kim Si Yun ),장준호 ( Chang Chun Ho ),김승직 ( Kim Sung Jig ),신상영 ( Shin Sang Young ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
The paper introduce the experimental program of investigation on the performance of RC beams strengthened with Uni-Directional Narrow Fabric. A total of twelve shear-critical specimens were constructed and experimentally investigated through static loading tests. Experimental parameters include the shear rebar, the type of fiber, and spacing of the fiber. Testing data were analyzed to investigate the performance of the specimens retrofitted or strengthened with Uni-Directional Narrow Fabric compared to the behavior of the non-retrofitted RC beam.