Browse > Article
http://dx.doi.org/10.5000/EESK.2018.22.1.015

A Discussion on the Seismic Coefficient for Gravity Quay Wall Considering Frequency Characteristics of Input Earthquake  

Lee, Moon Gyo (Department of Civil and Environmental Engineering, KAIST)
Ha, Jeong Gon (Department of Civil and Environmental Engineering, KAIST)
Park, Heon Joon (Department of Civil and Environmental Engineering, KAIST)
Kim, Dong Soo (Department of Civil and Environmental Engineering, KAIST)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.22, no.1, 2018 , pp. 15-22 More about this Journal
Abstract
Pseudo-static approach has been conventionally applied for the design of gravity type quay walls. In this method, seismic coefficient ($k_h$), expressed in terms of acceleration due to gravity, is used to convert the real dynamic behavior to an equivalent pseudo-static inertial force for seismic analysis and design. Therefore, the calculation of an appropriate $k_h$ considering frequency characteristics of input earthquake is critical for representing the real dynamic behavior. However, the definitions of $k_h$, which is used for simplified analysis in Korea, focuses only on convenience that is easy to use, and the frequency characteristics of input earthquake are not reflected in the $k_h$ definitions. This paper evaluates the influences of the frequency characteristics of input earthquake on $k_h$ by initially reviewing the $k_h$ definitions in the existing codes of Japan for port structures and then by performing a series of dynamic centrifuge tests on caisson gravity quay walls of different earthquake input motions (Ofunato, Hachinohe). A review of the existing codes and guidelines has shown that the $k_h$ values are differently estimated according to the frequency characteristics of input earthquake. On the other hand, based on the centrifuge tests, it was found that the permanent displacements of wall are more induced when long-period-dominant earthquake is applied.
Keywords
Seismic coefficient; Pseudo-static analysis; Quay wall; Frequency characteristics; Dynamic centrifuge test;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Ministry of Land, Transport and Maritime Affairs. Seismic Performance evaluation & improvement revision of existing structures (Harbors). Korea Infrastructures Safety and Technology Corporation. c2012.
2 Lee MG, Jo SB, Cho HI, Park HJ, Kim DS. A Discussion on the Definitions of Seismic Coefficient for Gravity Quay Wall in Korea. Journal of the Earthquake Engineering Society of Korea. 2017;21(2):77-85.   DOI
3 Nozu A, Ichii K, Sugano T. Seismic design of port structures. Journal of Japan Association for Earthquake Engineering. 2004;4(3):195-208.   DOI
4 Nagao T, Iwata N, Fujimura M, Morishita N, Sato H, Ozaki R. Seismic Coefficients of Caisson Type and Sheet Pile Type Quay Walls Against the Level-one Earthquake Ground Motion. Technical note of National Institute for Land and Infrastructure Management. 2006;1-26.
5 Cakir T. Evaluation of the Effect of Earthquake Frequency Content on Seismic Behavior of Cantilever Retaining Wall Including Soil-structure Interaction. Soil Dynamics and Earthquake Engineering. 2013;45:96-111.   DOI
6 Hatami K, Bathurst RJ. Effect of Structural Design on Fundamental Frequency of Reinforced-soil Retaining Walls. Soil Dynamics and Earthquake Engineering. 2000;19(3):137-157.   DOI
7 Lee MG, Ha JG, Jo SB, Park HJ, Kim DS. Assessment of Horizontal Seismic Coefficient for Gravity Quay Walls by Centrifuge Tests. Geotechnique Letters. 2017;7(2):211-217.   DOI
8 Comite Europeen de Normalisation. Eurocode 8: Design of Structures for Earthquake Resistance. Part 5: Foundations, Retaining Structures. Geotechnical Aspects. CEN, Brussels. c2004.
9 Ministry of Transport. Technical standards for Ports and Harbour Facilities in Japan. c1999 translated version of 港灣の施設物の技術上の基準‧同解說(日本港灣協會, 1999).
10 Ministry of Transport. Technical standards for Ports and Harbour Facilities in Japan. c2007 translated version of 港灣の施設物の技術上の基準‧同解說(日本港灣協會, 2007).
11 Noda S, Uwabe T, Chiba T. Relation between Seismic Coefficient and Ground Acceleration for Gravity Quay Wall. Report of Port and Harbour Research Institute. 1975;14(4):67-111.
12 Kim SR, Jang IS, Chung CK, Kim MM. Evaluation of Seismic Displacements of Quay Walls. Soil Dynamics and Earthquake Engineering. 2005;25:451-459.   DOI
13 Kim DS, Kim NR, Choo YW, Cho GC. A Newly Developed State-of-the-art Geotechnical Centrifuge in Korea. KSCE Journal of Civil Engineering. 2013;17(1):77-84.   DOI
14 Lee SH, Choo YW, Kim DS. Performance of an Equivalent Shear Beam (ESB) Model Container for Dynamic Geotechnical Centrifuge Tests. Soil Dynamics and Earthquake Engineering. 2013;44:102-114.   DOI
15 Terzaghi K. General Wedge Theory of Earth Pressure. American Society of Civil Engineers Transactions. 1941;106:68-97.
16 Zeng, X. Seismic Response of Gravity Quay Walls. I: Centrifuge Modeling. Journal of Geotechnical and Geoenvironmental Engineering. 1998;124(5):406-417   DOI
17 Ministry of Construction and Transportation. Research of Seismic Design Criterea (II). Earthquake Engineering Society of Korea. c1997.
18 Ministry of Oceans and Fisheries. Seismic Design Standards of Harbor and Port. Earthquake Engineering Society of Korea. c1999.
19 Seo HY, Park KS, Kim IH, Kim DS. A discussion on the improvement of seismic design criteria of infrastructures. Journal of the Earth quake Engineering Society of Korea. 2014;18(5):231-240.   DOI