Abstract
Modified Piled Raft (MPR) foundations have the potential to reduce seismic force transmission to the superstructure compared to connected piled raft foundations. However, the responses of the separation layer in improving the seismic resilience of the structure were not extensively parameterized before. To address this gap, the investigation explores the potential for enhancing the seismic resilience of MPR foundations in seismically active regions by integrating sustainable materials in the separation layer between the raft and pile group. A novel separation layer is proposed by integrating geofoams with different types of soils. The performance of this novel separation layer is explored through a comprehensive 3D finite element analysis under both static and dynamic loading conditions. Using the OpenSees software platform, an extensive numerical analysis was undertaken to examine the influence of various key parameters on the system's behaviour. A comprehensive analysis of these parameters was conducted to evaluate the responses of MPR foundations with and without geofoam in the separation layer, specifically in the context of ground motion analysis. Raft thickness, pile configuration, separation layer thickness, and the materials used in the separation layer were all considered. The findings indicate that raft thickness and pile length are crucial influencing factors on the dynamic response of the MPR system. Furthermore, the inclusion of EPS geofoam in the separation layer demonstrated its effectiveness in reducing the acceleration amplitude at the top of the raft by 44.25% and lateral displacement by 47.84%, effectively mitigating the impact of seismic waves reaching the upper surface of the raft.
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The datasets generated during and/or analysed during the current study are not publicly available due to the ongoing research works but are available from the corresponding author on reasonable request.
References
Abdelrahman GE, Elragi A (2006) Behaviour improvement of footings on soft clay utilizing geofoam. In: The 10th Arab structural engineering conference, 13 -15 November, Kuwait.
Baldi G, Belloni G, Maggioni W (1988) The ISMES Geotechnical Centrifuge. In: Corte´ JF, Balkema (eds) In: Proceedings of the international conference centrifuge 88, Paris, 25–27 April 1988. Rotterdam, The Netherlands, pp 45–48
Cao XD, Wong IH, Chang M-F (2004) Behavior of model rafts resting on pile-reinforced sand. J Geotech Geoenviron Eng 130:129–138. https://doi.org/10.1061/(asce)1090-0241(2004)130:2(129)
Chanda D, Saha R, Haldar S, Choudhury D (2023) State-of-the-art review on responses of combined piled raft foundation subjected to seismic loads using static and dynamic approaches. Soil Dyn Earthq Eng 169:107869. https://doi.org/10.1016/j.soildyn.2023.107869
Chatterjee K, Choudhury D, Rao VD, Poulos HG (2019) Seismic response of single piles in liquefiable soil considering P-delta effect. Bull Earthq Eng 17:2935–2961. https://doi.org/10.1007/s10518-019-00588-2
Chaudhuri CH, Chanda D, Saha R, Haldar S (2020) Three-dimensional numerical analysis on seismic behavior of soil-piled raft-structure system. Structures 28:905–922. https://doi.org/10.1016/j.istruc.2020.09.024
Clancy P, Randolph MF (1993) An approximate analysis procedure for piled raft foundations. Int J Numer Anal Methods Geomech 17:849–869
Clancy P, Randolph MF (1996) Simple design tools for piled raft foundations. Geotechnique 46:313–328. https://doi.org/10.1680/geot.1996.46.2.313
de Sanctis L, Mandolini A (2006) Bearing capacity of piled rafts on soft clay soils. J Geotech Geoenviron Eng 132:1600–1610. https://doi.org/10.1061/(asce)1090-0241(2006)132:12(1600)
El Gendy M, El Araby I, El Kamash W, Sallam E, El Labban A (2017) Experimental study for the effect of static and dynamic loads on clay utilizing geofoam. Port-Said Eng Res J 21:241–249. https://doi.org/10.21608/pserj.2017.33373
El Kamash W, El Naggar H, Nabil M, Ata A (2020) Optimizing the unconnected piled raft foundation for soft clay soils: numerical study. KSCE J Civ Eng 24:1095–1102. https://doi.org/10.1007/s12205-020-0567-3
El-Garhy BM (2022) A simplified method for the nonlinear analysis of composite piled raft foundation. Geotech Geol Eng 40:4357–4375. https://doi.org/10.1007/s10706-022-02159-w
Fellenius BH, Altaee AA (1995) Critical depth: how it came into being and why it does not exist. Proc Inst Civ Eng Geotech Eng 113:107–111
Fioravante V, Giretti D (2010) Contact versus noncontact piled raft foundations. Can Geotech J 47:1271–1287. https://doi.org/10.1139/T10-021
Horikoshi K, Randolph MF (1997) On the definition of raft-soil stiffness ratio for rectangular rafts. Geotechnique 47:1055–1061. https://doi.org/10.1680/geot.1997.47.5.1055
Horikoshi K, Randolph MF (1998) A contribution to optimum design of piled rafts. Geotechnique 48:301–317. https://doi.org/10.1680/geot.1998.48.3.301
Horikoshi K, Matsumoto T, Hashizume Y, Watanabe T, Fukuyama H (2003) Performance of piled raft foundations subjected to static horizontal loads. Int J Phys Model Geotech 3:37–50
Hu L, Pu J (2004) Testing and modeling of soil-structure interface. J Geotech Geoenvironmental Eng 130:851–860. https://doi.org/10.1061/(asce)1090-0241(2004)130:8(851)
Jamiolkowski M, Ricceri G, Simonini P (2009) Safeguarding Venice from high tides: Site characterization & geotechnical problems. Proc 17th Int Conf Soil Mech Geotech Eng Acad Pract Geotech Eng 4:3209–3227. https://doi.org/10.3233/978-1-60750-031-5-3209
Katzenbach R, Leppla S, Choudhury D (2016) Foundation systems for high-rise structures. CRC Press, Taylor & Francis Group
Kumar A, Choudhury D (2017) Load sharing mechanism of combined pile-raft foundation (CPRF) under seismic loads. Geotech Eng 48:95–101
Kumar A, Choudhury D, Katzenbach R (2016) Effect of earthquake on combined pile-raft foundation. Int J Geomech. https://doi.org/10.1061/(asce)gm.1943-5622.0000637
Kumar A, Choudhury D, Patil M (2017) Soil – structure interaction in a combined pile – raft foundation – a case study. Proc Inst Civ Eng Geotech Eng 170:117–128. https://doi.org/10.1680/jgeen.16.00075
Liang FY, Chen LZ, Shi XG (2003) Numerical analysis of composite piled raft with cushion subjected to vertical load. Comput Geotech 30:443–453. https://doi.org/10.1016/S0266-352X(03)00057-0
Lin L-K, Chen L-H, Chen RHL (2010) Evaluation of geofoam as a geotechnical construction material. J Mater Civ Eng 22:160–170. https://doi.org/10.1061/(asce)0899-1561(2010)22:2(160)
Mattsson N, Menoret A, Simon C, Ray M (2013) Case study of a full-scale load test of a piled raft with an interposed layer for a nuclear storage facility. Geotechnique 63:965–976. https://doi.org/10.1680/geot.12.P.166
Mayer MH, Gaul L (2007) Segment-to-segment contact elements for modelling joint interfaces in finite element analysis. Mech Syst Signal Process 21:724–734. https://doi.org/10.1016/j.ymssp.2005.10.006
Melese FW, Gebregziabher HF (2021) Behavior of structurally non-connected settlement reducing piles under raft foundation. J Civ Environ Eng 11:1–8
Modarresi M, Rasouli H, Ghalesari AT, Baziar MH (2016) Experimental and numerical study of pile-to-pile interaction factor in sandy soil. Procedia Eng 161:1030–1036. https://doi.org/10.1016/j.proeng.2016.08.844
Mylonakis G, Gazetas G (2000) Seismic soil-structure interaction: beneficial or detrimental? J Earthq Eng 4:277–301. https://doi.org/10.1080/13632460009350372
Park HJ, Ko KW, Song YH, Song MJ, Jin S, Ha JG, Kim DS (2020) Centrifuge modeling of disconnected piled raft using vertical pushover tests. Acta Geotech 15:2637–2648. https://doi.org/10.1007/s11440-020-00928-6
Pecker A (2004) Design and construction of the rion antirion bridge. 40744:216–240. https://doi.org/10.1061/40744(154)7
Petracca M, Candeloro F, Camata G (2017) STKO user manual. ASDEA Softw Technol Pescara Italy
Poulos HG, Davis EH (1980) Pie foundation analysis and design, 1980th edn. Rainbow-Bridge Book Co
Priyadarshee A, Kumar V, Sharma K, Kumar A (2024) Study on the load sharing in piled raft foundation. Multiscale Multidiscip Model Exp Des. https://doi.org/10.1007/s41939-024-00380-z
Rasouli H, Taghavi Ghalesari A, Modarresi M, Hasanzadeh A (2017) Numerical Study of Non-Contact Piled Raft Interaction under Static Loads. In: Proceedings of the 5th international conference on civil engineering and urban planning. pp 750–762
Rasouli H, Fatahi B (2019) A novel cushioned piled raft foundation to protect buildings subjected to normal fault rupture. Comput Geotech 106:228–248. https://doi.org/10.1016/j.compgeo.2018.11.002
Roy J, Kumar A, Choudhury D (2018) Natural frequencies of piled raft foundation including superstructure effect. Soil Dyn Earthq Eng 112:69–75. https://doi.org/10.1016/j.soildyn.2018.04.048
Saadatinezhad M, Lakirouhani A, Asli SJ (2019) Seismic response of non-connected piled raft foundations. Int J Geotech Eng. https://doi.org/10.1080/19386362.2019.1565392
Saadatinezhad M, Lakirouhani A, Jabini Asli S (2021) Seismic response of non-connected piled raft foundations. Int J Geotech Eng 15:66–80. https://doi.org/10.1080/19386362.2019.1565392
Saha R, Dutta SC, Haldar S, Kumar S (2020) Effect of soil-pile raft-structure interaction on elastic and inelastic seismic behaviour. Structures 26:378–395. https://doi.org/10.1016/j.istruc.2020.04.022
Sharma VJ, Vasanvala SA, Solanki CH (2012) Effect of cushion on composite piled raft foundation in layered soil under seismic forces. Comput Methods Civ Eng 322:314–322
Sreya MV, Jayalekshmi BR, Venkataramana K (2022) Effect of coir reinforced soil on the seismic response of RC framed buildings. Indian Geotech J 52:568–589. https://doi.org/10.1007/s40098-021-00593-w
Steenfelt JS, Foged B, Augustesen AH (2015) Izmit Bay bridge - geotechnical challenges and innovative solutions. Int J Bridg Eng 3:53–68
Taghavi Ghalesari A, Janalizadeh Choobbasti A (2018) Numerical analysis of settlement and bearing behaviour of piled raft in Babol clay. Eur J Environ Civ Eng 22:978–1003. https://doi.org/10.1080/19648189.2016.1229230
Tradigo F, Pisanò F, di Prisco C, Mussi A (2015) Non-linear soil-structure interaction in disconnected piled raft foundations. Comput Geotech 63:121–134. https://doi.org/10.1016/j.compgeo.2014.08.014
Wong IH, Chang MF, Cao XD (2000) Raft foundations with disconnected settlement-reducing piles. Des Appl Raft Found. https://doi.org/10.1680/daorf.27657.0017
Yamashita K, Shigeno Y, Hamada J, Chang D (2018) Seismic response analysis of piled raft with grid-form deep mixing walls under strong earthquakes with performance-based design concerns. Soils Found 58:65–84. https://doi.org/10.1016/j.sandf.2017.12.002
Zhu W, Yang Y, Zhang N, Zhao Z (2023) Performance study of buried box culverts subjected to footing load and protected by compressible materials. Multiscale Multidiscip Model Exp Des. https://doi.org/10.1007/s41939-023-00267-5
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Amalu P A. The first draft of the manuscript was written by Amalu P A and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Amalu, P.A., Jayalekshmi, B.R. Geofoam integrated separation layer for enhancing seismic resilience in modified piled raft foundations. Multiscale and Multidiscip. Model. Exp. and Des. (2024). https://doi.org/10.1007/s41939-024-00474-8
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DOI: https://doi.org/10.1007/s41939-024-00474-8