반복적인 작은 규모의 지진에 대한 앵커의 저항특성

In order to increase the stability of the structure, anchors have been widely used for structures such as frictional type anchors for slopes, buoyant anchors for subways. However, The traditional type of anchor which is frictional resistance anchor is often reported for failure due to vibration construction procedure such as blasting end so on. If the anchor loses a bearing capacity due to vibration, there will be huge loss of life and economic loss such as derailment of train, collapse of slope, destruction of structure.
Since the earthquake that occurred in Gyeongju on September 12, 2016, there have been 215 earthquakes with a magnitude of 2.0 or more. However, studies on the vibratory resistance of anchors in Korea have been insignificant levels. In order to verify vibratory resistance characteristics of new expansion anchor against blasting and earthquake vibration, field tests and numerical analyses for seismic were performed. Field blasting test results show that the expansion anchor has better capability from vibratory load than frictional type anchor. The numerical analyses for earthquake simulation results also show that the expansion type anchor has more resistance than frictional type anchor.