Effective Stress Analyses of Port Structures

Iai, Susumu; Ichii, Koji; Liu, Hanlong; Morita, Toshikazu

doi:10.3208/sandf.38.special_97

Cited by 80 publications

(18 citation statements)

References 6 publications

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“…In this regard, the definition of k h could be further improved in future studies. In addition, the influence of excess pore water pressure developed in the backfill during earthquake should be evaluated for port structures (Zeng & Steedman, 1993;Iai et al, 1998;Kim et al, 2005;Lee, 2005).…”

Section: Evaluation Of Two Major Considerations In Defining K Hmentioning

confidence: 99%

Assessment of horizontal seismic coefficient for gravity quay walls by centrifuge tests

Lee

Jo³

et al. 2017

Géotechnique Letters

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In the simplified analysis of seismic design of gravity quay walls based on the pseudo-static approach, selection of an appropriate horizontal seismic coefficient (k h ) is important for computing the equivalent pseudo-static inertial force. However, there is no unified standard for defining k h . There are conflicts among the existing k h definitions regarding whether it considers (a) the effect of wall height on maximum horizontal acceleration (MHA) used in the determination of k h or (b) the application of correction factor for k h according to seismic performance grade. This paper evaluates the relevance of these conflicts by initially reviewing the k h definitions in the existing codes and guidelines for port structures and then by performing a series of dynamic centrifuge tests on caisson gravity quay walls of different wall heights (5, 10 and 15 m). A review of the existing codes and guidelines has shown that the correction factor for k h should be specified according to the seismic performance grade for the economical design of quay walls. On the other hand, based on the centrifuge tests, it was found that the MHA used in k h calculation and the correction factor for considering seismic performance grade should reflect the effect of wall height.

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Section: Evaluation Of Two Major Considerations In Defining K Hmentioning

confidence: 99%

Assessment of horizontal seismic coefficient for gravity quay walls by centrifuge tests

Lee

Jo³

et al. 2017

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“…8, joint elements are specified at the bottom of the caisson to allow sliding and separation between the caisson and the rubble mound. The friction angle of the element is set to 31 degrees based on previous work [16]. After a static gravity analysis to set the initial conditions for the dynamic tsunami analysis, the tsunami wave force (described below) is applied to the caisson as an equivalent static distributed force as shown in Fig.…”

Section: Load Conditions For Simulating the Tsunamimentioning

confidence: 99%

Centrifuge model tests and large deformation analyses of a breakwater subject to combined effects of tsunami

Ueda

Iai

Tobita

2016

Soil Dynamics and Earthquake Engineering

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In this study, centrifuge model tests and effective stress analyses are performed on a tsunami-affected breakwater similar to those that were seriously damaged during the magnitude-9.0 East Japan Earthquake in 2011. The centrifuge model tests are performed at a scale of 1/200 to simulate the failure of the breakwater. This study is a significant improvement on a previous one by the same authors. The centrifuge model tests now allow the seepage flow to be blocked as well as admitted, and the effective stress analyses are now performed based on the finite strain formulation in order to take large deformations into account instead of just the infinitesimal strain formulation that is applicable only to small displacements. Both the centrifuge model tests and the effective stress analyses demonstrate the important part played by the seepage of pore water in the failure of the rubble mound, in addition to the wave force of the tsunami action. In particular, it is shown that the breakwater damage of 2011 could have been prevented or at least mitigated by preventing seepage flow in the rubble mound.

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“…19. Although these quay walls were constructed along a straight Inagaki et al, 1996;Iai et al, 1998]. …”

Section: Remediation Of Liquefiable Soils For Port Structures In Japamentioning

confidence: 99%

“…Soil-structure interaction poses additional complex problems. Thus, since the late 1980s, increasing attention has been directed towards a full seismic response analysis of port structures using the finite element or finite difference technique [Iai and Kameoka, 1993;Iai, 1998;Iai et al, 1998]. …”

Section: Introductionmentioning

confidence: 99%

Untitled

IAI¹

2005

J. Earth. Eng.

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The paper gives an overview of the remedial measures against liquefaction for port structures. Case histories of implementation and performance of these remediation measures during past earthquakes are reviewed. The paper discusses the applicability and limitations of the conventional simplified approach and how these limitations can be overcome in the performance-based approach using a full seismic response analysis of a soil-structure system. -structure interaction. 77 J. Earth. Eng. 2005.09:77-103. Downloaded from www.worldscientific.com by UNIVERSITY OF OTAGO on 07/15/15. For personal use only.

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Effective Stress Analyses of Port Structures

Cited by 80 publications

References 6 publications

Assessment of horizontal seismic coefficient for gravity quay walls by centrifuge tests

Assessment of horizontal seismic coefficient for gravity quay walls by centrifuge tests

Centrifuge model tests and large deformation analyses of a breakwater subject to combined effects of tsunami

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