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Dynamic analysis of composite beam subjected to harmonic moving load based on the third-order shear deformation theory

Mohammad Javad REZVANIL, Mohammad Hossein KARGARNOVIN, Davood YOUNESIAN

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 409-418 doi: 10.1007/s11465-011-0245-8

Abstract: The beam is made of laminated composite, and located on a Pasternak viscoelastic foundation.the effects of two types of composite materials, stiffness and shear layer viscosity coefficients of foundation

Keywords： timoshenko composite beam     pasternak viscoelastic foundation     third-order shear deformation theory (TSDT    

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Linear and nonlinear elastic analysis of closely spaced strip foundations using Pasternak model

Priyanka GHOSH, S. RAJESH, J. SAI CHAND

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 228-243 doi: 10.1007/s11709-016-0370-x

Abstract: , an attempt is made to determine the interaction effect of two closely spaced strip footings using Pasternakcarried out by deriving the equations for the interference effect of the footings in the framework of Pasternakthe finite difference method to solve the second order nonlinear differential equation evolved from Pasternakpresented in terms of non-dimensional interaction factors by varying different parameters like width of the foundation, load on the foundation and the depth of the rigid base.

Keywords： bearing capacity     linear and non-linear elasticity     foundation     interaction effect     numerical modeling     Pasternak    

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Simulation of viscoelastic behavior of defected rock by using numerical manifold method

Feng REN, Lifeng FAN, Guowei MA

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 199-207 doi: 10.1007/s11709-011-0102-1

Abstract: Numerical simulations of longitudinal wave propagation in a rock bar with microcracks are conducted by using the numerical manifold method which has great advantages in the simulation of discontinuities. Firstly, validation of the numerical manifold method is carried out by simulations of a longitudinal stress wave propagating through intact and cracked rock bars. The behavior of the stress wave traveling in a one-dimensional rock bar with randomly distributed microcracks is subsequently studied. It is revealed that the highly defected rock bar has significant viscoelasticity to the stress wave propagation. Wave attenuation as well as time delay is affected by the length, quantity, specific stiffness of the distributed microcracks as well as the incident stress wave frequency. The storage and loss moduli of the defected rock are also affected by the microcrack properties; however, they are independent of incident stress wave frequency.

Keywords： stress wave propagation     defected rock     numerical manifold method     viscoelastic behavior     storage modulus    

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An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal

Qi WEI, Xiaohui ZHANG

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 507-516 doi: 10.1007/s11708-010-0017-x

Abstract: Thermal convection of viscoelastic fluids saturating a horizontal porous layer heated from below is analyzedThe viscoelastic character of the flow is considered by a modified Darcy’s law.The effects of interphase heat transfer on the thermal convection of viscoelastic fluids in a porous

Keywords： thermal convection     porous media     viscoelastic fluid     thermal nonequilibrium model    

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Mortarless structures based on topological interlocking

DYSKIN, Elena PASTERNAK, Yuri ESTRIN

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 188-197 doi: 10.1007/s11709-012-0156-8

Abstract: We review the principle of topological interlocking and analyze the properties of the mortarless structures whose design is based on this principle. We concentrate on structures built of osteomorphic blocks – the blocks possessing specially engineered contact surfaces allowing assembling various 2D and 3D structures. These structures are easy to build and can be made demountable. They are flexible, resistant to macroscopic fractures and tolerant to missing blocks. The blocks are kept in place without keys or connectors that are the weakest elements of the conventional interlocking structures. The overall structural integrity of these structures depends on the force imposed by peripheral constraint. The peripheral constraint can be provided in various ways: by an external frame or features of site topography, internal pre-stressed cables/tendons, or self-weight and is a necessary auxiliary element of the structure. The constraining force also determines the degree of delamination developing between the blocks due to bending and thus controls the overall flexibility of the structure thus becoming a new design parameter.

Keywords： topological interlocking     fragmented structures     segmented structures     constraint     delamination     bending stiffness    

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Linear viscoelastic behavior of asphalt binders and mixtures containing very high percentages of reclaimed

Frontiers of Structural and Civil Engineering   Pages 1211-1227 doi: 10.1007/s11709-023-0983-9

Abstract: The primary aim of this study is to correlate the impact of aggregates, if any, on the viscoelastic behaviorconstructed and Shift-Homothety-Shift in time-Shift (SHStS) transformation was used to compare the linear viscoelasticThe influence of aggregates on the viscoelastic behavior of asphalt mixtures depends on temperature andThe maximum difference (60% to 70%) in the viscoelastic behavior of the binder and mixture based on SHStS

Keywords： RAP     complex modulus     SHStS transformation     rejuvenation     behavior of asphalt binder and mixture    

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Torsional vibrations of a cylindrical foundation embedded in a saturated poroelastic half-space

Dazhi WU,Lu YU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 194-202 doi: 10.1007/s11709-015-0292-z

Abstract: Considering the interactions between an embedded foundation and saturated soil, the torsional vibrationsof a cylindrical foundation embedded in a saturated poroelastic medium are analyzed in this paper.Both a rigid foundation and an elastic foundation are considered.Assuming both the side surface and the bottom surface of the foundation are perfectly bonded to soil,of an embedded cylindrical foundation are presented.

Keywords： embedded foundation     saturated soil     rigid foundation     elastic foundation     torsional vibration    

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Numerical modeling of current-induced scour around multi-wall foundation using large-eddy simulation

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 546-565 doi: 10.1007/s11709-023-0943-4

Abstract: Scouring is one of the primary triggers of failure for bridges across rivers or seas. However, research concerning the scour mechanism of multi-wall foundations (MWFs) remains scarce, hindering the further application of MWFs. In this study, for the first time, the scouring effect caused by unidirectional flow around MWFs was examined numerically using FLOW-3D involving a large-eddy simulation. Initially, the applicability of the scouring model and input parameters was validated using a case study based on published measured data. Subsequently, the scouring effects of four MWFs with different wall arrangements and inflow angles, including the flow field analysis and scour pit and depth, were investigated thoroughly. It was found that the maximum scour depth of MWFs with an inflow angle of 0° was smaller than that of those with an inflow angle of 45°, regardless of the wall arrangement. Meanwhile, changing the inflow angle significantly affects the scour characteristics of MWFs arranged in parallel. In practical engineering, MWFs arranged in parallel are preferred considering the need for scouring resistance. However, a comparative analysis should be performed to consider comprehensively whether to adopt the form of a round wall arrangement when the inflow angle is not 0° or the inflow direction is changeable.

Keywords： multi-wall foundation     current-induced scour     bridge foundation     large-eddy simulation     numerical analysis    

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Evaluation of seismic reliability of gravity dam-reservoir-inhomogeneous foundation coupled system

Hamid Taghavi GANJI, Mohammad ALEMBAGHERI, Mohammad Houshmand KHANEGHAHI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 701-715 doi: 10.1007/s11709-018-0507-1

Abstract: The seismic performance of gravity dam-reservoir-foundation coupled system is investigated utilizingThe methodology is applied to Pine Flat gravity dam and the foundation is considered to be inhomogeneousThe effects of the deconvolution process, number of samples, and foundation inhomogeneity are investigated

Keywords： gravity dams     dam-reservoir-foundation interaction     seismic reliability     inhomogeneous foundation     earthquake    

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Comparative study on foundation treatment methods of immersed tunnels in China

Shaochun WANG, Xuehui ZHANG, Yun BAI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 82-93 doi: 10.1007/s11709-019-0575-x

Abstract: typical traffic immersed tunnels built in China, this paper details the features of the four dominant foundationtreatment methods for immersed tunnel construction: pile foundation, sand flow foundation, groutingfoundation, and gravel bedding foundation.Further, a comprehensive comparison of settlement and cost of these four foundation treatment methodsThe findings of this article could henceforth be applied to foundation treatment work in immersed tube

Keywords： foundation treatment method     immersed tunnel     subsoil stress     settlement    

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Creep and recovery behaviors of magnetorheological elastomers

Weihua LI, Yang ZHOU, Tongfei TIAN, Gursel ALICI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 341-346 doi: 10.1007/s11465-010-0096-8

Abstract: Moreover, a four-parameter viscoelastic model was developed to describe MRE creep behaviors.

Keywords： magneto-rheological elastomers (MREs)     creep     recovery     linear viscoelastic model    

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Centrifuge model test and field measurement analysis for foundation pit with confined water

Chunlin DING , Xiaohong MENG ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 299-304 doi: 10.1007/s11709-009-0035-0

Abstract: The similarity law of centrifuge test was developed for the seepage field and stress field of a foundationBased on the deep foundation pit of the Huangxing Road Station of the Shanghai metro line M8, the deformation

Keywords： foundation pit with confined water     centrifuge model test     seepage-stress coupling field     similarity relation    

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Influencing factors and control measures of excavation on adjacent bridge foundation based on analytic

Shuangxi FENG, Huayang LEI, Yongfeng WAN, Haiyan JIN, Jun HAN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 461-477 doi: 10.1007/s11709-021-0705-0

Abstract: internal force of the piles, as well as inordinate settlement of soil surrounding the existing bridge foundationIt was found that the excavation depth and the distance between the foundation pit and the bridge foundationFor the FEM, the FE baseline model was calibrated based on the case of no bridge surrounding the foundationFurthermore, the lateral displacement of the bridge pile foundation, the internal force of the piles,and the settlement of the soil surrounding the pile foundation were emphatically analyzed.

Keywords： deep foundation pit excavation     adjacent bridge foundation     influencing factors     analytic hierarchy process    

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An efficient method for the dynamic interaction of open structure-foundation systems

LIU Jingbo, GU Yin, LI Bin, WANG Yan

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 340-345 doi: 10.1007/s11709-007-0045-8

Abstract: The structure-foundation system is transformed from an original open system into an approximately hermeticThis procedure is highly efficient in analyzing dynamic structure-foundation interaction problems insource problem in 2-dimensions (2-D) elastic semi-infinite space, and the other is a dynamic structure-foundationThe results also indicate that the proposed method is more advantageous for solving large structure-foundation

Keywords： structure-foundation interaction     superposition     interaction problem     freedom     efficient    

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Improved numerical method for time domain dynamic structure-foundation interaction analysis based on

DU Jianguo, LIN Gao

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 336-342 doi: 10.1007/s11709-008-0054-2

Abstract: finite element method (SBFEM), an improved time domain numerical approach for the dynamic structure-foundationWith reasonable choice of the number of base functions, the degrees of freedom on the structure-foundationIt may be concluded that the proposed approach is suitable for large-scale structure-foundation interaction

Keywords： structure-foundation interface     computational efficiency     different     suitable     numerical approach    

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Title Author Date Type Operation

Dynamic analysis of composite beam subjected to harmonic moving load based on the third-order shear deformation theory

Mohammad Javad REZVANIL, Mohammad Hossein KARGARNOVIN, Davood YOUNESIAN

Journal Article

Linear and nonlinear elastic analysis of closely spaced strip foundations using Pasternak model

Priyanka GHOSH, S. RAJESH, J. SAI CHAND

Journal Article

Simulation of viscoelastic behavior of defected rock by using numerical manifold method

Feng REN, Lifeng FAN, Guowei MA

Journal Article

An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal

Qi WEI, Xiaohui ZHANG

Journal Article

Mortarless structures based on topological interlocking

DYSKIN, Elena PASTERNAK, Yuri ESTRIN

Journal Article

Linear viscoelastic behavior of asphalt binders and mixtures containing very high percentages of reclaimed

Journal Article

Torsional vibrations of a cylindrical foundation embedded in a saturated poroelastic half-space

Dazhi WU,Lu YU

Journal Article

Numerical modeling of current-induced scour around multi-wall foundation using large-eddy simulation

Journal Article

Evaluation of seismic reliability of gravity dam-reservoir-inhomogeneous foundation coupled system

Hamid Taghavi GANJI, Mohammad ALEMBAGHERI, Mohammad Houshmand KHANEGHAHI

Journal Article

Comparative study on foundation treatment methods of immersed tunnels in China

Shaochun WANG, Xuehui ZHANG, Yun BAI

Journal Article

Creep and recovery behaviors of magnetorheological elastomers

Weihua LI, Yang ZHOU, Tongfei TIAN, Gursel ALICI,

Journal Article

Centrifuge model test and field measurement analysis for foundation pit with confined water

Chunlin DING , Xiaohong MENG ,

Journal Article

Influencing factors and control measures of excavation on adjacent bridge foundation based on analytic

Shuangxi FENG, Huayang LEI, Yongfeng WAN, Haiyan JIN, Jun HAN

Journal Article

An efficient method for the dynamic interaction of open structure-foundation systems

LIU Jingbo, GU Yin, LI Bin, WANG Yan

Journal Article

Improved numerical method for time domain dynamic structure-foundation interaction analysis based on

DU Jianguo, LIN Gao

Journal Article