Abstract
An unconnected pile foundation allows separation between the lower pile and the pile cap, and it has been proposed as an effective foundation type for reducing the seismic load during strong earthquakes. However, previous quantitative evaluations of unconnected piles with various foundation types and earthquake intensities are inadequate. In this study, the influence of base shaking level and the material of the interposed layer between pile and pile cap on the seismic behaviour of unconnected piles were evaluated using a centrifuge model test to reproduce the field stress conditions. A dynamic centrifuge model test was completed on an experimental model consisting of dry sandy soil, a foundation and a single degree-of-freedom structure. The acceleration of the structure and the settlement of the foundation system were measured during base shaking. For the unconnected pile system, the structural seismic load reduction effect due to rocking behaviour was confirmed, and the unconnected pile foundation with the interposed layer with large stiffness had less vertical settlement than the conventional shallow foundation. Finally, the rotational stiffness and damping ratio for the foundation system used in the centrifuge model tests were derived and discussed.
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References
Allmond JD, Kutter BL (2014) Design considerations for rocking foundations on unattached piles. J Geotech Geoenviron Eng 140:4014058. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001162
Anastasopoulos I, Kontoroupi T (2014) Simplified approximate method for analysis of rocking systems accounting for soil inelasticity and foundation uplifting. Soil Dyn Earthq Eng 56:28–43. https://doi.org/10.1016/j.soildyn.2013.10.001
Antonellis G, Panagiotou M (2014) Seismic response of bridges with rocking foundations compared to fixed-base bridges at a near-fault site. J Bridg Eng 19:4014007. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000570
ASCE/SEI 41 (2014) Seismic evaluation and retrofit of existing buildings. American Society of Civil Engineers, Reston
Chotesuwan A, Mutsuyoshi H, Maki T (2012) Seismic behavior of bridges with pier and foundation strengthening: PsD tests and analytical study. Earthq Eng Struct Dyn 41:279–294. https://doi.org/10.1002/eqe.1129
Deng L, Kutter BL, Kunnath SK (2012) Probabilistic seismic performance of rocking-foundation and hinging-column bridges. Earthq Spectra 28:1423–1446. https://doi.org/10.1193/1.4000093
Deng L, Kutter BL, Kunnath SK (2014) Seismic design of rocking shallow foundations: displacement-based methodology. J Bridg Eng 19:4014043. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000616
Eslami A, Veiskarami M, Eslami MM (2012) Study on optimized piled-raft foundations (PRF) performance with connected and non-connected piles-three case histories. Int J Civ Eng 10:100–111
FEMA 356 (2000) Prestandard and commentary for the seismic rehabilitation of buildings
Fioravante V, Giretti D (2010) Contact versus noncontact piled raft foundations. Can Geotech J 47:1271–1287. https://doi.org/10.1139/T10-021
Gajan S, Kutter BL (2008) Capacity, settlement, and energy dissipation of shallow footings subjected to rocking. J Geotech Geoenviron Eng 134:1129–1141. https://doi.org/10.1061/(ASCE)1090-0241(2008)134:8(1129)
Gajan S, Kutter BL (2009) Effects of moment-to-shear ratio on combined cyclic load-displacement behaviour of shallow foundations from centrifuge experiments. J Geotech Geoenviron Eng 135:1044–1055. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000034
Garnier J, Pecker A (1999) Use of centrifuge tests for the validation of innovative concepts in foundation engineering. In: Pinto S (ed) Earthquake geotechnical engineering. Balkema, Rotterdam, pp 431–439
Gazetas G (2015) 4th Ishihara lecture: Soil–foundation–structure systems beyond conventional seismic failure thresholds. Soil Dyn Earthq Eng 68:23–39. https://doi.org/10.1016/j.soildyn.2014.09.012
Ha JG, Lee S-H, Kim D-S, Choo YW (2014) Simulation of soil–foundation–structure interaction of Hualien large-scale seismic test using dynamic centrifuge test. Soil Dyn Earthq Eng 61–62:176–187. https://doi.org/10.1016/j.soildyn.2014.01.008
Kim MK, Lee SH, Choo YW, Kim DS (2011) Seismic behaviours of earth-core and concrete-faced rock-fill dams by dynamic centrifuge tests. Soil Dyn Earthq Eng 31:1579–1593. https://doi.org/10.1016/j.soildyn.2011.06.010
Kim DS, Kim NR, Choo YW, Cho GC (2013a) A newly developed state-of-the-art geotechnical centrifuge in Korea. KSCE J Civ Eng 17:77–84. https://doi.org/10.1007/s12205-013-1350-5
Kim DS, Lee SH, Choo YW, Perdriat J (2013b) Self-balanced earthquake simulator on centrifuge and dynamic performance verification. KSCE J Civ Eng 17:651–661. https://doi.org/10.1007/s12205-013-1591-3
Kim DK, Lee SH, Kim DS, Choo YW, Park HG (2015) Rocking effect of a mat foundation on the earthquake response of structures. J Geotech Geoenviron Eng 141:4014085. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001207
Ko K-W, Ha J-G, Park H-J, Kim D-S (2018) Comparison between cyclic and dynamic rocking behavior for embedded shallow foundation using centrifuge tests. Bull Earthq Eng. https://doi.org/10.1007/s10518-018-0409-6
Kokkali P, Abdoun T, Anastasopoulos I (2015) Centrifuge modeling of rocking foundations on improved soil. J Geotech Geoenviron Eng 141:4015041. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001315
Kourkoulis R, Gelagoti F, Anastasopoulos I (2012) Rocking isolation of frames on isolated footings: design insights and limitations. J Earthq Eng 16:374–400. https://doi.org/10.1080/13632469.2011.618522
Kramer SL (1996) Geotechnical earthquake engineering. Prentice-Hall, New York
Kutter BL, Moore M, Hakhamaneshi M, Champion C (2016) Rationale for shallow foundation rocking provisions in ASCE 41-13. Earthq Spectra 32:1097–1119. https://doi.org/10.1193/121914EQS215M
Lee SH, Choo YW, Kim DS (2013) Performance of an equivalent shear beam (ESB) model container for dynamic geotechnical centrifuge tests. Soil Dyn Earthq Eng 44:102–114. https://doi.org/10.1016/j.soildyn.2012.09.008
Martakis P, Taeseri D, Chatzi E, Laue J (2017) A centrifuge-based experimental verification of soil–structure interaction effects. Soil Dyn Earthq Eng 103:1–14. https://doi.org/10.1016/j.soildyn.2017.09.005
Paolucci R, Figini R, Petrini L (2013) Introducing dynamic nonlinear soil–foundation–structure interaction effects in displacement-based seismic design. Earthq Spectra 29:475–496. https://doi.org/10.1193/1.4000135
Park H-J, Ha J-G, Kwon S-Y, Lee M-G, Kim D-S (2017) Investigation of the dynamic behaviour of a storage tank with different foundation types focusing on the soil-foundation-structure interactions using centrifuge model tests. Earthq Eng Struct Dyn 46(14):2301–2316
Pecker A (2004) Design and construction of the Rion Antirion Bridge. In: Yegian MK, Kavazanjian E (eds) Geotechnical engineering for transportation projects, proceedings of geo-trans 2004, Los Angeles, Calif., 27–31 July 2004. GSP 126. American Society of Civil Engineers, Reston, pp 216–240
Pitilakis D, Dietz M, Wood DM et al (2008) Numerical simulation of dynamic soil–structure interaction in shaking table testing. Soil Dyn Earthq Eng 28:453–467. https://doi.org/10.1016/j.soildyn.2007.07.011
Safak E (1995) Detection and identification of soil–structure interaction in buildings from vibration recordings. J Struct Eng 121:899–906. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:5(899)
Shirato M, Kouno T, Asai R, Nakatani S, Fukui J, Paolucci R (2008) Large-scale experiments on nonlinear behavior of shallow foundations subjected to strong earthquakes. Soils Found 48:673–692. https://doi.org/10.3208/sandf.48.673
Stewart JP, Fenves GL, Seed RB (1999) Seismic soil–structure interaction in buildings. i: analytical methods. J Geotech Geoenviron Eng 125:26–37. https://doi.org/10.1061/(ASCE)1090-0241(1999)125:1(26)
Teguh M, Duffield CF, Mendis PA, Hutchinson GL (2006) Seismic performance of pile-to-pile cap connections: an investigation of design issues. Electron J Struct Eng 6:8–18
Tileylioglu S, Stewart JP, Nigbor RL (2011) Dynamic stiffness and damping of a shallow foundation from forced vibration of a field test structure. J Geotech Geoenviron Eng 137(4):344–353
Zhang F, Okawa K, Kimura M (2008) Centrifuge model test on dynamic behavior of group-pile foundation with inclined piles and its numerical simulation. Front Archit Civ Eng China 2:233–241. https://doi.org/10.1007/s11709-008-0033-7
Acknowledgements
This research was supported by a Grant (030401) from the Infrastructure and Transportation Technology Promotion Research Program funded by the Ministry of Land, Infrastructure and Transport of the Korean government. This research was also supported by the National Research Foundation (NRF) of Korea Grant funded by the Korean government (MSIP) (No. NRF-2015R1A2A1A15054531). The authors acknowledge the KREONET service provided by the Korea Institute of Science and Technology Information.
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Ha, JG., Ko, KW., Jo, SB. et al. Investigation of seismic performances of unconnected pile foundations using dynamic centrifuge tests. Bull Earthquake Eng 17, 2433–2458 (2019). https://doi.org/10.1007/s10518-018-00530-y
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DOI: https://doi.org/10.1007/s10518-018-00530-y