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Deformation control criterion of shield tunnel under lateral relaxation of soft soil

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5, Pages 780-795 doi: 10.1007/s11709-023-0944-3

Abstract: Metro shield tunnels under the lateral relaxation of soil (LRS) are susceptible to significant lateralThe LRS is simulated by linearly reducing the loads applied to the lateral sides of the segment structureDuring lateral unloading, the lateral earth pressure coefficient on the segment decreases almost exponentiallyFor a shield tunnel with a diameter of approximately 6 m and under the lateral relaxation of sandy soil

Keywords： shield tunnel lateral relaxation of soil deformation control criterion of segment structure model

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Optimum lateral extent of soil domain for dynamic SSI analysis of RC framed buildings on pile foundations

Nishant SHARMA, Kaustubh DASGUPTA, Arindam DEY

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1, Pages 62-81 doi: 10.1007/s11709-019-0570-2

Abstract: for finite element based numerical dynamic soil structure interaction (SSI) studies.Lateral extent of soil domain, along with the soil properties, were varied exhaustively for a particulardifferent locations in the SSI system (quantified by normalized root mean square error, ), the optimum lateralextent of the soil domain is prescribed for various structural widths, soil types and peak ground accelerationThese relationships can be readily applied for deciding upon the lateral extent of the soil domain for

Keywords： soil structure interaction optimum lateral extent of soil domain length multi-storyed framed building

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Seismic effects on reinforcement load and lateral deformation of geosynthetic-reinforced soil walls

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 1001-1015 doi: 10.1007/s11709-021-0734-8

Abstract: Current design methods for the internal stability of geosynthetic-reinforced soil (GRS) walls postulatedistributions are used to determine the required connection strength and to approximately assess the facing lateralacceleration, and secondary reinforcement are conducted to investigate seismic impacts on the stability and lateral

Keywords： geosynthetics reinforced soil retaining walls seismic performance

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Evaluation of liquefaction-induced lateral displacement using Bayesian belief networks

Mahmood AHMAD, Xiao-Wei TANG, Jiang-Nan QIU, Feezan AHMAD

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1, Pages 80-98 doi: 10.1007/s11709-021-0682-3

Abstract: Liquefaction-induced lateral displacement is responsible for considerable damage to engineered structuresTherefore, an accurate estimation of lateral displacement in liquefaction-prone regions is an essentialThis paper presents a novel probabilistic framework for evaluating liquefaction-induced lateral displacementThe two BBN models are proposed to predict lateral displacements for free-face and sloping ground conditionsThis study also presents a sensitivity analysis to evaluate the impacts of input factors on the lateral

Keywords： Bayesian belief network seismically induced soil liquefaction interpretive structural modeling lateral

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Finding buckling points for nonlinear structures by dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Hossein ESTIRI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1, Pages 23-61 doi: 10.1007/s11709-019-0549-z

Abstract: Dynamic Relaxation Method (DRM) is an explicit approach for solving the simultaneous systems of equationsMixing the dynamic relaxation scheme with external work technique has not been formulated so far.In fact, the suggested load factor depends only on the Dynamic Relaxation (DR) fictitious parameters.It is shown that author’s technique is quicker than the other dynamic relaxation strategies.

Keywords： load factor external work dynamic relaxation static equilibrium path large displacement

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Nonlinear analysis of cable structures using the dynamic relaxation method

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1, Pages 253-274 doi: 10.1007/s11709-020-0639-y

Abstract: The dynamic relaxation method (DRM) is an explicit procedure for analyzing these types of structures.

Keywords： nonlinear analysis cable structure stiffness matrix dynamic relaxation method

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Association of gene variants with juvenile amyotrophic lateral sclerosis

Frontiers of Medicine doi: 10.1007/s11684-023-1005-y

Abstract: Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease characterized by progressive

Keywords： TRMT2B amyotrophic lateral sclerosis mitochondrial complex I tRNA methylation reactive oxygen

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Model testing of tripod caisson foundations in silty clay subjected to eccentric lateral loads

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3, Pages 467-476 doi: 10.1007/s11709-023-0933-6

Abstract: conducted to investigate the bearing capacities of tripod caisson foundations subjected to eccentric lateralLateral load–rotation curves of five eccentric-shaped tripod suction foundations were plotted to analyzeeccentric tripod caisson foundations, the traditional tripod foundation has a relatively high ultimate lateralcaissons, a formula for the rotational center of the tripod caisson foundation subjected to an eccentric lateralundrained condition, suction was generated under the lid of the “up-lift” caisson, which helps resist lateral

Keywords： tripod caisson foundation silty clay eccentric lateral capacity model tests

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Increased expression of coronin-1a in amyotrophic lateral sclerosis: a potential diagnostic biomarker

Frontiers of Medicine 2022, Volume 16, Issue 5, Pages 723-735 doi: 10.1007/s11684-021-0905-y

Abstract: Amyotrophic lateral sclerosis (ALS) is the most common motor neuron disease.

Keywords： amyotrophic lateral sclerosis coronin-1a autophagy pathogenesis

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A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1, Pages 176-189 doi: 10.1007/s11709-018-0486-2

Abstract: Dynamic relaxation method (DRM) is one of the suitable numerical procedures for nonlinear structuralBased on this formulation, a new time step is found for the viscous dynamic relaxation.

Keywords： viscous dynamic relaxation time step displacement error geometric nonlinear analysis

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Experimental and theoretical investigations of the lateral vibrations of an unbalanced Jeffcott rotor

Ali ALSALEH, Hamid M. SEDIGHI, Hassen M. OUAKAD

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4, Pages 1024-1032 doi: 10.1007/s11709-020-0647-y

Abstract: The current work experimentally explores and then theoretically examines the lateral vibrations of anby adopting the Lagrange method on the basis of rigid rotor assumptions to theoretically predict the lateral

Keywords： rotor-dynamics Jeffcott rotor lateral vibrations Lagrange method system-equivalent stiffness sleeve bearings

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The stress relaxation of cement clinkers under high temperature

Xiufang WANG,Yiwang BAO,Xiaogen LIU,Yan QIU

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4, Pages 413-417 doi: 10.1007/s11465-015-0357-7

Abstract: This research provides a theoretical proof for the mechanism of the stress relaxation of cement clinkersCompression stress relaxation under various high temperatures is discussed using a specially developedThe cell shows that stress relaxation dramatically increases and that the remaining stress rapidly decreases

Keywords： stress relaxation high temperature cement clinker compression elastic modulus

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Response of basement wall in tall buildings foundation under lateral loading

Irfan JAMIL; Irshad AHMAD; Aqeel Ur REHMAN; Aqib AHMED; Ameer HAMZA; Wali ULLAH

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 11, Pages 1415-1423 doi: 10.1007/s11709-022-0885-2

Abstract: during the foundation design, engineers have not considered the basement wall contribution to resisting lateralbasement wall contribution, and the raft contribution including for piled raft foundations, to resisting lateralResults show that when a basement wall is present, the lateral displacement decreases and the demand

Keywords： basement wall lateral load displacement piled raft

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Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2, Pages 239-248 doi: 10.1007/s11709-011-0110-1

Abstract: Surcharge load (e.g. embankment fill) will induce settlement and outward lateral displacement, whilevacuum pressure will induce settlement and inward lateral displacement of a ground.Ideally, combination of surcharge load and vacuum pressure can reduce or minimize the lateral displacementFor the conditions investigated, the results indicate that the outward lateral displacement increasesAlso, it is shown that for a given and condition, lateral displacement reduces with the increase

Keywords： vacuum consolidation lateral displacement PVD finite element analysis surcharge load

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Numerical investigation of the ultimate lateral resistance of piles in soft clay

Konstantinos P. TZIVAKOS,Michael J. KAVVADAS

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2, Pages 194-200 doi: 10.1007/s11709-014-0251-0

Abstract: The paper presents a numerical study on the undrained lateral response of a single, free-head, reinforcedSoil conditions simulating normally consolidated clays are examined—undrained shear strength increasingwith depth—and the pile-soil interaction under static lateral loading is analyzed.are imported into a beam-on-nonlinear-Winkler-foundation simulation in order to predict the pile head lateralat providing the estimation of a range of values for the ultimate soil resistance coefficient with

Keywords： laterally loaded pile soft clay p?y curves finite element method (FEM)