Equivalent damping for displacement-based seismic design of pile-supported wharves with soil–pile interaction

Gao, Shufei; Gong, Jinxin; Yu, Feng

doi:10.1016/j.oceaneng.2016.08.006

Cited by 15 publications

(7 citation statements)

References 11 publications

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“…The energy dissipation of the soil plays an important role to quantify the energy dissipation of the PSWS. Energy dissipations of earthquake waves in soil are correlated to several mechanism including small‐strain material damping, hysteretic damping 1 …”

Section: Analysis and Deterministic Resultsmentioning

confidence: 99%

“…For a PSWS embedded in soil, the pile‐deck structural system is designed to develop plastic hinges in the piles instead of in the deck. Thus, the energy dissipation of the wharf mainly comes from inelastic deformation of the plastic hinges in piles and the soil–pile interaction during a seism; in this sense, piles and soil contribute to energy dissipation to the wharf 1 …”

Section: Methodsmentioning

confidence: 99%

“…Spectral demands. The equivalent viscous damping ratio ξ eq is considered as a sum of ξ plus the hysteretic damping ratio ξ hyst (i.e, ξ eq = ξ + ξ hyst ), which depends on dissipated/stored energy 1 . ξ hyst is correlated to the first point of the bilinear curve and to the performance point of the pushover curve 48 .…”

Section: Methodsmentioning

confidence: 99%

“…Due to economic loss and tremendous impact on society by severe earthquakes affecting the regions where the constructions are located, seismic design of PSWSs has attracted great interest 1–5 . Displacement‐based seismic design methods have been used in port industry for decades.…”

Section: Introductionmentioning

confidence: 99%

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Pushover analysis for flexible and semi‐flexible pile‐supported wharf structures accounting the dynamic magnification factors due to torsional effects

Zacchei

Lyra

Stucchi

2020

Structural Concrete

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This is a pushover analysis for pile‐supported wharves considering the dynamic magnification factors due to torsional effects. The piles seismic design by deterministic approach is shown accounting plastic hinges and P‐delta effects in 2D/3D mathematical modeling. A real structure placed at high seismicity area is considered as case study in order to validate the model and provide reliable technical data. New bound limits of seismic demands associated with damage states and the best soil performance are identified. A stochastic approach is proposed to estimate the no‐exceedance probability of horizontal displacements of a semi‐flexible with respect to a flexible model. Results are plotted in terms of base shears, displacements, and energy. The advantage of the use of pushover analysis in terms of displacements is estimated in 18–38%. Other results as bound limits, hysteretic damping, plastic rotation are compared with previous studies.

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Section: Analysis and Deterministic Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pushover analysis for flexible and semi‐flexible pile‐supported wharf structures accounting the dynamic magnification factors due to torsional effects

Zacchei

Lyra

Stucchi

2020

Structural Concrete

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show abstract

“…Piles in earthquake region have also received much attention, especially for port facilities where socio-economic impact of catastrophes could be tremendous for the long term [10]. Displacementbased design approach is probably the most widely adopted (e.g.…”

Section: Introductionmentioning

confidence: 99%

Improved Soil-Pile Interaction of Floating Pile in Sand With Shaft Treatment

Chan¹

2017

GEOMATE

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ABSTRACT:The present study explored the efficacy of pile shaft surface treatment on the improvement of soil-pile frictional resistance for floating or friction piles. 4 surface conditions of model piles measuring 200 mm long and 20 mm in diameter were examined, namely smooth (control), roughened, fishbone and checked shafts. A pile cap made of plywood was fixed to the top of the pile with 10 mm embedment depth, leaving 190 mm clearance for installation in the sand bed. The test chamber was a see-through glass tank with a footprint of 100 mm x 200 mm and 300 mm height. Coarse sand of D50 = 1.5 mm were loosely placed in the chamber by layers up to 200 mm height before the piles were installed either in single or triple group formations. The incremental load test of conducted via application of dead load ranging between 0.01-0.08 kPa on the pile cap, and the corresponding settlement was recorded. The test results revealed settlement to be reduced by the piles in the order of roughened > fishbone > checked > smooth for the single pile configuration, with maximum reduction of 40 % recorded by the roughened pile. As for the pile group, settlement reduction of the piles with surface treatment clearly outperformed the control pile by almost 50 %, though differences between the former were marginal with seemingly overlapping stress-strain plots. All in all the surface treatment of pile shaft enhanced the shaft friction for the piles installed in sand, but field implementation would require further examination of the pile-driving efficiency as the improved piles could cause additional resistance during installation.

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Pushover Analysis Accounting for Torsional Dynamic Amplifications for Pile-Supported Wharves

Zacchei

Lyra

Stucchi

2022

Mechanisms and Machine Science

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Equivalent damping for displacement-based seismic design of pile-supported wharves with soil–pile interaction

Cited by 15 publications

References 11 publications

Pushover analysis for flexible and semi‐flexible pile‐supported wharf structures accounting the dynamic magnification factors due to torsional effects

Pushover analysis for flexible and semi‐flexible pile‐supported wharf structures accounting the dynamic magnification factors due to torsional effects

Improved Soil-Pile Interaction of Floating Pile in Sand With Shaft Treatment

Pushover Analysis Accounting for Torsional Dynamic Amplifications for Pile-Supported Wharves

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