Evaluation of performance of port structures during earthquakes

Iai, Susumu

doi:10.1016/j.soildyn.2018.04.055

Cited by 21 publications

(4 citation statements)

References 27 publications

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“…There are many reasons causing port closure, such as labor strike, terrorist attack, natural disaster, etc., one of which should be the earthquake. In recent years, significant damages to port facilities resulting from earthquakes in U.S. and Haiti have obviously illustrated that strong earthquake can severely affect port facilities, especially wharves [2]. The 1989 Loma Prieta, California, earthquake caused considerable damages to pile-supported wharf at 7th Street Terminal of the Port of Oakland, and the damages mainly occurred at the pile-deck connections [3].…”

Section: Introductionmentioning

confidence: 99%

Seismic fragility analysis of concrete pile-supported wharves based on single-degree-of-freedom model

Gao

2022

SN Appl. Sci.

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This study proposes a new procedure to predict the seismic fragility curves of concrete pile-supported wharf based on an equivalent single-degree-of-freedom (SDOF) model. The SDOF model is utilized to substitute the practical wharf structure during probabilistic seismic demand analysis for reducing the computational cost and complexity. The trilinear backbone cure and Pivot hysteresis model, whose parameters are determined by the pushover analysis of actual wharf, are incorporated in the SDOF model to represent hysteresis characteristics and strength degradation of wharf. To validate the reasonability of the proposed procedure, two case studies are conducted by comparing the difference of fragility curves developed from actual wharf and its equivalent SDOF model based on the cloud method. The results show that the curves are located very closely on the graph, and the curve of SDOF model is generally above that of actual wharf, which indicates that the SDOF model may provide a conservative assessment for fragility analysis of wharf.

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Section: Introductionmentioning

confidence: 99%

Seismic fragility analysis of concrete pile-supported wharves based on single-degree-of-freedom model

Gao

2022

SN Appl. Sci.

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“…Probabilistic analyses and fragility curves (Akiyama et al, 2020;Burns Patrick et al, 2021) are examples of multi-hazard approaches that aim to determine the occurrence probability of both phenomena simultaneously and the expected level of damage of structures after them. Recent multi-hazard literature has focused on structures in the urban environment such as buildings and bridges (Attary et al, 2021;Burns Patrick et al, 2021;Ishibashi et al, 2021;Karafagka et al, 2018), while little attention has been paid to the response of road networks to sequential earthquake-tsunami processes (Iai, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Besides the simulation models available to assess the individual effects of earthquake and tsunami loads on transport infrastructure, a few, limited modelling approaches to predict sequential damage and effects are available. From a review of the literature on fragility and vulnerability models, it was seen that most studies focus on individual transport components or networks, usually considering only one hazard at a time (Argyroudis and Kaynia, 2015;Argyroudis and Mitoulis, 2021;Briaud and Maddah, 2016;Iai, 2019;Maruyama et al, 2010;NIBS, 2004). The studies mentioned focus mainly on the vulnerability of bridges and tunnels, and the main emphasis is on ground movement due to seismic excitation.…”

Section: Introductionmentioning

confidence: 99%

Modelling the sequential earthquake–tsunami response of coastal road embankment infrastructure

Sancha

Silva

Areu-Rangel

et al. 2022

Nat. Hazards Earth Syst. Sci.

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Abstract. Transport networks in coastal, urban areas are extremely vulnerable to seismic events, with damage likely due to both ground motions and tsunami loading. Most existing models analyse the performance of structures under either earthquakes or tsunamis, as isolated events. This paper presents a numerical approach that captures the sequential earthquake–tsunami effects on transport infrastructure in a coastal area, taking into consideration the combined strains of the two events. Firstly, the dynamic cyclic loading is modelled, applied to the soil-structure system using a finite-difference approximation to determine the differential settlement, lateral displacement and liquefaction potential of the foundation. Next, using a finite-volume method approach, tsunami wave propagation and flooding potential are modelled. Finally, the hydrostatic and hydrodynamic loads corresponding to the wave elevation are applied to the post-earthquake state of the structure to obtain a second state of deformation. The sequential model is applied to an embankment in Manzanillo, Mexico, which is part of a main urban road; the response is analysed using ground motion records of the 1995 Manzanillo earthquake–tsunami event.

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“…[7]. Fully coupled dynamic consolidation analysis has been carried out by Madabushi and Zeng [31] for gravity walls; by Alyami et al [1], Iai and coworkers et al [23][24][25] and Tashiro [48], who considered different types of quay walls with the main objective of modeling the occurrence of dynamic liquefaction; by Morigi et al [35] and Wang et al [49], who analyzed excavations supported by cantilevered or anchored diaphragm walls in saturated sands.…”

Section: Introductionmentioning

confidence: 99%

On the effects of pore water pressure buildup and dissipation on the seismic performance of a propped r.c. diaphragm wall in sand

2020

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The study concerns the analysis of a retaining structure composed by a couple of r.c. diaphragm walls propped at the crest in loose and medium-dense, variably saturated sand under seismic conditions. Fully coupled dynamic equilibrium conditions and pore water flow in the porous soil have been taken into account, in order to assess the effects that the development and subsequent dissipation of excess pore water pressures can have on the performance of such structures under seismic conditions. To this end, a series of simulations in which the saturated soil permeability is varied of about two orders of magnitude has been carried out, in order to consider different evolution rates for the dynamic consolidation process. The von Wolffersdorff hypoplastic model and the van Genuchten water retention equation have been used to describe the mechanical and hydraulic behavior of the sand. The results obtained in a large series of finite element simulations show a significant dependence of the seismic performance of the structure evaluated in terms of permanent rotations and structural loads, in view of the modern performance-based design criteria on the excess pore pressures buildup during the seismic shaking and on its dissipation with time. For the particular seismic input considered, neither fully drained nor fully undrained conditions can be considered applicable in most of the cases considered. In such conditions, the quantitative assessment of wall and soil displacements, pore water pressures and effective stress distributions within the soil requires necessarily the solution of a fully coupled, nonlinear dynamic consolidation problem.

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Evaluation of performance of port structures during earthquakes

Cited by 21 publications

References 27 publications

Seismic fragility analysis of concrete pile-supported wharves based on single-degree-of-freedom model

Seismic fragility analysis of concrete pile-supported wharves based on single-degree-of-freedom model

Modelling the sequential earthquake–tsunami response of coastal road embankment infrastructure

On the effects of pore water pressure buildup and dissipation on the seismic performance of a propped r.c. diaphragm wall in sand

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