J Korean Soc Hazard Mitig 2018; 18(1): 23-33  https://doi.org/10.9798/KOSHAM.2018.18.1.23
Dynamic Resistance Characteristics of Anchors Under Frequent Small Magnitude Earthquakes
Kim, Youngmin*, Heo, Cheolbum**, Park, Sungbum***, and Cho, KookHwan****
*Member, Undergraduate Course, Seoul National University of Science & Technology
**Master’s Course, Seoul National University of Science & Technology
***Master’s Course, Seoul National University of Science & Technology
****Member, Professor, Dept. of Railway Construction Engineering, Graduate School of Railway, Seoul National University of Science & Technology
Correspondence to: Member, Professor, Dept. of Railway Construction Engineering, Graduate School of Railway, Seoul National University of Science & Technology (Tel: +82-2-970-6584, Fax: +82-973-5866, E-mail: khcho@snut.ac.kr)
Received: September 30, 2017; Revised: October 18, 2017; Accepted: November 20, 2017; Published online: January 31, 2018.
© The Korean Society of Hazard Mitigation. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
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.
Keywords: Earthquakes, Vibration, Expansion Anchor, Seismic


This Article

e-submission

Archives

Indexed/Covered by