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Kinematic Demands on Pile-Supported Wharves due to Liquefaction-Induced Lateral Ground Deformations
The study presented in this paper uses results from five large-scale physical centrifuge models on pile-supported wharves to evaluate the accuracy of Newmark sliding block analysis combined with pile-pinning effects in estimating kinematic demands on piles. The piles in the centrifuge tests were subjected to varying degrees of liquefaction-induced lateral ground deformations from multiple shaking events creating a total of ten (10) well-instrumented “case histories” to evaluate the applicability of existing design methods to predict kinematic demands, the results of which are used to propose measures to improve existing methods. The results show that median Newmark displacements provide a good estimate of the permanent end-of-shaking displacements, but underestimated the peak transient displacements, and that median + 1σ Newmark displacements provided a good estimate of the peak transient displacements, which represent the peak pile demand. Design recommendations are provided to improve the kinematic demand estimates on piles that include incorporating pile-pinning effects in Newmark and limit equilibrium analyses.
Kinematic Demands on Pile-Supported Wharves due to Liquefaction-Induced Lateral Ground Deformations
The study presented in this paper uses results from five large-scale physical centrifuge models on pile-supported wharves to evaluate the accuracy of Newmark sliding block analysis combined with pile-pinning effects in estimating kinematic demands on piles. The piles in the centrifuge tests were subjected to varying degrees of liquefaction-induced lateral ground deformations from multiple shaking events creating a total of ten (10) well-instrumented “case histories” to evaluate the applicability of existing design methods to predict kinematic demands, the results of which are used to propose measures to improve existing methods. The results show that median Newmark displacements provide a good estimate of the permanent end-of-shaking displacements, but underestimated the peak transient displacements, and that median + 1σ Newmark displacements provided a good estimate of the peak transient displacements, which represent the peak pile demand. Design recommendations are provided to improve the kinematic demand estimates on piles that include incorporating pile-pinning effects in Newmark and limit equilibrium analyses.
Kinematic Demands on Pile-Supported Wharves due to Liquefaction-Induced Lateral Ground Deformations
Torkelson, Thomas (author) / Khosravifar, Arash (author) / Souri, Milad (author) / McCullough, Nason (author)
16th Triennial International Conference ; 2022 ; Honolulu, Hawaii
Ports 2022 ; 308-319
2022-09-15
Conference paper
Electronic Resource
English