Seismic Response Analysis of Pile Foundations

Thavaraj, Thuraisamy; Finn, W. D. Liam; Wu, Gang

doi:10.1007/s10706-010-9311-y

Cited by 23 publications

(10 citation statements)

References 5 publications

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“…The seismic design using the static p-y curves or cyclic p-y curves is not reasonable for evaluating the ground deformation and soil-pile interaction generated by earthquake loading [Rovithis et al, 2009;Thavaraj et al, 2010]. Nevertheless, the API p-y curve with a coefficient considering cyclic condition [American Petroleum Institute, 1987] is generally used for pseudo-static analysis for the seismic design of a pile [Thavaraj et al, 2010].…”

Section: Introductionmentioning

confidence: 99%

Dynamic P-Y Curves for Dry Sand from Centrifuge Tests

Yoo

Choi

Han

et al. 2013

Journal of Earthquake Engineering

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In this article, the simplified dynamic p-y backbone curve was suggested through a series of dynamic centrifuge tests. The centrifuge tests were carried out for a single pile in dry sand, while changing the conditions such as pile diameters, relative densities, input acceleration amplitudes and frequencies. Based on the results, the dynamic p-y backbone curve was formed as a hyperbolic function by connecting the peak points of the resulting experimental dynamic p-y curves, which corresponded to the maximum soil resistances. In order to represent the p-y backbone curve numerically, the initial stiffness k ini and the ultimate subgrade reaction p u of soil, which are required to formulate the p-y backbone curve, were proposed as a function of the properties of a pile and soil. The dynamic p-y backbone curve was compared with the p-y curves that are currently used in practice. Also, the applicability of the dynamic p-y backbone curve was verified using psuedo-static analysis, and the analysis result using the backbone curve more successfully simulated the other centrifuge test results than that using the existing p-y curve.

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Section: Introductionmentioning

confidence: 99%

Dynamic P-Y Curves for Dry Sand from Centrifuge Tests

Yoo

Choi

Han

et al. 2013

Journal of Earthquake Engineering

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“…3. The stimulation of the pier, the beam and the foundation can be found in the literature [13][14][15]. …”

Section: The Controlled Rocking Isolation Design For Tall Pier Wimentioning

confidence: 99%

Rocking Isolation of Tall Pier with Pile Foundations Based on Double-Spring Model

Chen

Xia

Liu

et al. 2015

2015 Seventh International Conference on Measuring Technology and Mechatronics Automation

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A double-spring model for rocking isolation of tall piers with pile foundations, restoring force curve and the spring stiffness are proposed. Rocking isolation for bridges with tall piers are analyzed by using nonlinear time-history method, and the results are compared with those obtained by using concentrated rotational springs which are more simplified. The results show that the vibration period is not fixed after rocking and uplift of the pier, the anti-overturning moment is very close to the peak moment at the bottom of piers with the effect of rocking isolation is stable, and less affected by input ground motions. Displacement-time curve of the top of the pier and the moment at the pier bottom, obtained by using double-spring model is close to those obtained by using concentrated rotational-springs model, which are more simplified.

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“…Deep foundations often intercept groundwater tables and require expensive dewatering. The deep foundations are subjected to high lateral loading and perform poorly if liquefaction occurs followed by the seismic activity [9][10].…”

Section: Introductionmentioning

confidence: 99%

The Appraisal of Hybrid Foundations on Loose Granular Soil of Western Saudi Arabia

Farooq

Shaath

2020

Proc. eng. technol. innov.

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Western Saudi Arabia is the most important geographic location for the Islamic world. Millions of pilgrims annually visit the region. To accommodate this huge number of pilgrims, various tall buildings are constructed, yet there is a need for many more. The demolition of old buildings is also in progress. The soil supporting of the foundations mostly comprises sand with varying relative density. Most of the buildings are supported by conventional foundations, which require deep excavation for low relative densities. The combinations of pile and raft or hybrid foundations have been effectively used in tall buildings around the globe. In this research, COMSOL Multiphysics FEM analysis has been adopted to investigate the performance of a hybrid foundations with different pile combinations supported on loose granular soil. The results reflect the effective utilization of the hybrid foundation on loose sand. The arrangement of piles in the foundation system can affect the economy and safety of the structure.

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Seismic Response Analysis of Pile Foundations

Cited by 23 publications

References 5 publications

Dynamic P-Y Curves for Dry Sand from Centrifuge Tests

Dynamic P-Y Curves for Dry Sand from Centrifuge Tests

Rocking Isolation of Tall Pier with Pile Foundations Based on Double-Spring Model

The Appraisal of Hybrid Foundations on Loose Granular Soil of Western Saudi Arabia

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