Geologic site conditions and site coefficients for estimating earthquake ground motions in the inland areas of Korea |
| |
| Affiliation: | 1. Korea Earthquake Research Center, Geological and Environmental Hazards Division, Korea Institute of Geoscience and Mineral Resources, 30 Gajeong-dong, Yuseong-gu, Daejeon 305-350, Republic of Korea;2. Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea;3. School of Civil, Urban and Geosystem Engineering, Seoul National University, San 56-1, Shinlim-dong, Gwanak-gu, Seoul 151-742, Republic of Korea;1. Dept. of Civil and Environmental Engineering, Wonkwang Univ., Republic of Korea;2. Dept. of Civil and Environmental Engineering, KAIST, Daejeon, Republic of Korea;1. Department of Civil, Environmental, Building Engineering and Chemistry, Technical University of Bari, Via Edoardo Orabona, 4, 70126 Bari (BA), Italy;2. Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Via Terracini 28, 40131 Bologna, Italy;3. Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Roma, Italy;1. Powerchina Huadong Engineering Co., Ltd, Hangzhou, 311122, PR China;2. Institute of Geotechnical Engineering, Zhejiang University of Technology, Hangzhou, 310023, PR China;3. Zhejiang Huadong Construction Engineering Co., Ltd, Hangzhou, 310014, PR China;1. Department of Civil Engineering, Kunsan National University, Republic of Korea;2. Faculty of Technology and Technique, Quy-Nhon University, Viet Nam;3. Research Institute, Korea Electric Power Corporation Engineering & Construction, Republic of Korea |
| |
| Abstract: | Site characterization and site-specific ground response analyses were conducted at two representative inland areas in Korea. In situ tests included 25 boring investigations, 7 crosshole tests, 18 downhole tests and 41 SASW tests, and in the laboratory, resonant column tests were performed. The soil deposits in Korea, which were shallower and stiffer than those in the western US, were examined. The fundamental site periods were distributed in the narrow band ranging from 0.1 to 0.4 s. Most sites were designated as site classes C and D based on the mean shear wave velocity of the upper 30 m from the current Korean seismic design guide. Based on the ratio of the acceleration response spectra of ground surface to rock-outcrop, short-period (0.1–0.5 s) site coefficient, Fa ranged from 1.0 to 2.7, and mid-period (0.4–2.0 s) site coefficient, Fv ranged from 1.0 to 1.6, regardless of the input rock outcrop acceleration levels of 0.05 and 0.14 g. The site coefficients specified in the Korean seismic design guide, which is similar to NEHRP provisions and UBC, underestimate the ground motion in the short-period band and overestimate the ground motion in the mid-period band. These differences can be explained by the differences in the depth to bedrock and the soil stiffness profile between Korea and western US. Also, the site coefficients should be re-evaluated accounting for the local geologic conditions on the Korean peninsula. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
