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A platform for research: civil engineering, architecture and urbanism
Evaluation of performance-based seismic coefficient for gravity-type quay wall via centrifuge tests
Abstract Conventional simplified analysis methods for seismic design of gravity-type quay wall are based on providing capacity to resist a design seismic force, but they do not provide information on the performance of a structure when the limit of the force-balance is exceeded. In order to overcome the limitation of conventional seismic design methods, a performance-based seismic coefficient (k hk) concept which can verify the performance of port structures exceeding the limit of force-balance was proposed in the technical standards and commentaries for port and harbour facilities in Japan, published in 2007. The k hk concept considers the deformation of the quay wall, the wall height, the effect of frequency characteristics and duration of the ground motions, and the natural period of the ground. This paper proposes a performance verification method for the gravity-type quay wall during earthquakes through dynamic centrifuge model tests. The centrifuge tests were used in the present study to validate the proposed k hk concept for evaluating the seismic performance of the quay wall under various conditions. The reliability of the k hk concept was evaluated for different wall heights, earthquake motions and the thickness of subsoil, which are the primary variables in the k hk equation. In addition, some improvements that should be considered in the future revision of the k hk equation are discussed in this research.
Highlights Performance-based seismic coefficient (k hk) concept for gravity-type quay walls is evaluated by dynamic centrifuge tests. Important parameters for khk equation arewall height, thickness of subsoil, and frequency content of earthquake motions. A procedure to verify the k hk equation by comparing the measured and the allowable deformation of quay wall is suggested. Some improvements that should be considered in the future revision of the k hk equation are discussed.
Evaluation of performance-based seismic coefficient for gravity-type quay wall via centrifuge tests
Abstract Conventional simplified analysis methods for seismic design of gravity-type quay wall are based on providing capacity to resist a design seismic force, but they do not provide information on the performance of a structure when the limit of the force-balance is exceeded. In order to overcome the limitation of conventional seismic design methods, a performance-based seismic coefficient (k hk) concept which can verify the performance of port structures exceeding the limit of force-balance was proposed in the technical standards and commentaries for port and harbour facilities in Japan, published in 2007. The k hk concept considers the deformation of the quay wall, the wall height, the effect of frequency characteristics and duration of the ground motions, and the natural period of the ground. This paper proposes a performance verification method for the gravity-type quay wall during earthquakes through dynamic centrifuge model tests. The centrifuge tests were used in the present study to validate the proposed k hk concept for evaluating the seismic performance of the quay wall under various conditions. The reliability of the k hk concept was evaluated for different wall heights, earthquake motions and the thickness of subsoil, which are the primary variables in the k hk equation. In addition, some improvements that should be considered in the future revision of the k hk equation are discussed in this research.
Highlights Performance-based seismic coefficient (k hk) concept for gravity-type quay walls is evaluated by dynamic centrifuge tests. Important parameters for khk equation arewall height, thickness of subsoil, and frequency content of earthquake motions. A procedure to verify the k hk equation by comparing the measured and the allowable deformation of quay wall is suggested. Some improvements that should be considered in the future revision of the k hk equation are discussed.
Evaluation of performance-based seismic coefficient for gravity-type quay wall via centrifuge tests
Lee, Moon-Gyo (author) / Ha, Jeong-Gon (author) / Manandhar, Satish (author) / Park, Heon-Joon (author) / Kim, Dong-Soo (author)
Soil Dynamics and Earthquake Engineering ; 123 ; 292-303
2019-05-06
12 pages
Article (Journal)
Electronic Resource
English
Seismic performance of block-type gravity quay wall: numerical modeling versus centrifuge experiment
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