Application of regression models for the estimation of the flexible-base period of pile-supported structures in continuously inhomogeneous soils

Medina, Cristina; Álamo, Guillermo M.; Padrón, Luis A.; Aznárez, Juan J.; Maeso, Orlando

doi:10.1016/j.engstruct.2019.03.112

Cited by 7 publications

(2 citation statements)

References 32 publications

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“…Under the condition of additional mode, a model for estimating the moment of pile group affected by tunnel is established [34], and the optimal analytical set of parameters for impact analysis is P g � p g1 , p g2 , . .…”

Section: Tunnel Impact Analysis Outputmentioning

confidence: 99%

Numerical Simulation Algorithm Design of Influence on Existing Tunnel by Underpass Construction of New Tunnel

2021

Scientific Programming

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Simulation is a powerful tool that can be used for systematic planning, analysis, and decision-making. Proper designing is preliminary required to construct a new tunnel over an existing tunnel to ensure safety and durability. Once an underpass tunnel completes, the interaction between the tunnel structure and the nearby soil gains a stable state and the stress of the tunnel is balanced. However, the stability of an existing tunnel is affected if the construction in the nearby area is not properly analyzed. This article proposes a numerical simulation model to empirically analyze lining force and surface settlement in order to ensure safety in engineering practice. The existing tunnel structure working condition is simulated under the new tunnel. The artificial honeybee colony algorithm is used to extract the parameter fusion characteristic value of tunnel influence and the model of estimating the bending moment of group piles. The structural mechanics of existing tunnels under new tunnels are analyzed using the triple bend model to improve the bearing capacity of existing tunnels under new tunnels. Based on the above analysis, numerical simulation experiments are designed. The proposed method has high accuracy and strong fitting ability and can effectively reduce the displacement of existing tunnels. Moreover, the method can improve the bearing capacity of tunnels. For tunneling operation, the results of the simulation may be used as a recommendation.

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Section: Tunnel Impact Analysis Outputmentioning

confidence: 99%

Numerical Simulation Algorithm Design of Influence on Existing Tunnel by Underpass Construction of New Tunnel

2021

Scientific Programming

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“…Chiou and Tsai [22] presented assessment formulas for the displacement ductility capacity of a pile in Gibson cohesionless soils based on an ideal model. Medina et al [23] estimated the flexible-base fundamental period of structures supported on various pile configurations embedded in several Gibson soils. Efthymiou and Gazetas [24] conducted a finite-element study for the linear-elastic behavior of rigid suction caisson foundations installed in a Gibson soil stratum.…”

Section: Introductionmentioning

confidence: 99%

Two Novel Vlasov Models for Bending Analysis of Finite-Length Beams Embedded in Elastic Foundations

Yue

Fan

et al. 2022

Buildings

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The issue of soil–structure interaction (SSI) is essentially to analyze the influence of complex media on the mechanical behavior of supported structures. With the development of underground space, geological structures and space constraints put forward higher requirements for foundations and buildings. In this paper, the effects of soil heterogeneity and embedment depth on the bending of finite-length beams embedded in two novel Vlasov elastic foundations are investigated. Firstly, the constitutive relations of subsoil are simulated by Gibson and transversely isotropic soils, and the type of elastic foundation is described by the modified Vlasov model. Then, based on variational principles, the governing differential equations for the deformation and attenuation parameters of beams embedded in elastic foundations are derived by taking the variation of the minimum potential energy of the system, and the characteristic coefficient related to the embedment depth is introduced. Finally, the mechanical performance of the beam and foundation is obtained by an iterative technique and the Fourier series method, and an extensive parametric study is performed to examine influence of some basic parameters on the deformation and internal forces of the system. The results show that the mathematical expressions of two refined elastic models are in good agreement with those of the traditional Vlasov foundation after degradation. The iterative technique based on the principles of solid mechanics can be employed to obtain more reliable model parameters. More importantly, with the increase in the embedment depth, the mechanical responses of the beam and subgrade forces decrease. The main reason is that the restraint effect of the soil media around structures, which leads to the reduction of the characteristic coefficient affecting the displacement of beams. Moreover, the heterogeneity of soil, including Gibson characteristics and transverse isotropy, should be considered according to specific working conditions in civil engineering.

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Influence of soil non-homogeneity on the base shear force of piled structures subjected to harmonic seismic waves

Medina

Álamo

Aznárez

et al. 2020

Engineering Structures

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Application of regression models for the estimation of the flexible-base period of pile-supported structures in continuously inhomogeneous soils

Cited by 7 publications

References 32 publications

Numerical Simulation Algorithm Design of Influence on Existing Tunnel by Underpass Construction of New Tunnel

Numerical Simulation Algorithm Design of Influence on Existing Tunnel by Underpass Construction of New Tunnel

Two Novel Vlasov Models for Bending Analysis of Finite-Length Beams Embedded in Elastic Foundations

Influence of soil non-homogeneity on the base shear force of piled structures subjected to harmonic seismic waves

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