발파실험과 내진해석을 통한 Anchor의 동적 저항성에 관한 연구

Recently, as earthquakes have occurred in Gyeongju, interest in the stability of structures against vibrationfrom earthquakes has increased. In Korea, the capacity of load resistance is mainly considered in the design of anchors.However, the vibration resistance characteristics of anchors have not been fully elucidated. The traditional type ofanchor, which is a frictional resistance anchor, is often reported to fail due to vibration in construction procedures, suchas blasting. The expansion type of anchor, on the other hand, could have more resistance to vibration but its capabilityof demonstrating vibratory resistance has to be investigated. In order to verify the vibratory resistance characteristics ofexpansion anchors against blasting and earthquake vibration, field tests and numerical analyses for seismic wave wereperformed. Field blasting test results show that the expansion anchor has better capability against vibratory load thandoes the frictional type anchor. Numerical analysis to earthquake also show that the expansion type anchor providesmore resistance than does the frictional type anchor.