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http://dx.doi.org/10.5000/EESK.2021.25.1.011

A Study on the Correction Factors of Soil Non-linearity Considering Korean Regional Conditions for Seismic Deformation Method Applied to Multi-Utility Tunnels  

Choi, Jeong Ho (Department of Civil & Environmental Engineering, Kongju National University)
Yun, Jong Seok (Department of Civil & Environmental Engineering, Kongju National University)
Choo, Yun Wook (Department of Civil & Environmental Engineering, Kongju National University)
Youn, Jun Ung (National Center for Seismic Safety, KISTEC)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.25, no.1, 2021 , pp. 11-20 More about this Journal
Abstract
The seismic deformation method is conventionally used as a seismic design for a multi-utility tunnel in Korea. In the seismic deformation method, the soil ground's natural period is one of the most critical factors for calculating the ground displacement using cosine functions. Correction factors for the natural period and shear wave velocity have been used to consider the non-linearity of dynamic soil properties. However, the correction factors have been issued because the correction factors have not been sufficiently studied to consider Korea's regional conditions. This paper aims to evaluate the natural periods for the seismic deformation method considering Korea's ground conditions. Ground response analysis was performed using seven real earthquake records on twelve sites with different soil conditions where actual multi-utility tunnels are installed. As a result, natural periods of the sites were analyzed and new correction factors were proposed according to seismic performance and Korea's regional conditions.
Keywords
Multi-utility tunnel; Seismic deformation method; Ground response analysis; Natural period of ground;
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Times Cited By KSCI : 1  (Citation Analysis)
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