Numerical analysis to identify the unknown load distribution around a power tunnel lining

Based on the segmental joint tests, it was found that the practical range of joint flexural rigidity was in range of 8500-29000kN•m/rad. A simplified method for determining the stiffness reduction factor of tunnel lining() was proposed using results from the segmental joint tests in which some parameters were obtained by calibration against a 3D Numerical analysis. The influence of joint flexural rigidity, soil resistance coefficient, thickness of tunnel lining and tunnel calculation radius on the stiffness reduction factor of tunnel lining was examined. The stiffness reduction factor can be simply expressed as a function of joint flexural rigidity ratio, soil resistance coefficient, thickness of tunnel lining and tunnel calculation radius for the typical tunnel lining.

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Numerical analysis of effects of water leakage with loss of fines on concrete tunnel lining

Volcanic Rocks and Soils ◽

10.1201/b18897-49 ◽

2015 ◽

pp. 191-192

Author(s):

G. Ren ◽

C.Q. Li ◽

Y.Q. Tan

Keyword(s):

Numerical Analysis ◽

Tunnel Lining ◽

Water Leakage

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Influence of foundation settlements in load redistribution on columns in a monitoring construction - Case Study

Revista IBRACON de Estruturas e Materiais ◽

10.1590/s1983-41952010000300006 ◽

2010 ◽

Vol 3 (3) ◽

pp. 346-356 ◽

Cited By ~ 1

Author(s):

G. Savaris ◽

P. H. Hallak ◽

P. C. A. Maia

Keyword(s):

Numerical Analysis ◽

Numerical Model ◽

Finite Elements ◽

Load Distribution ◽

Numerical Models ◽

Normal Load ◽

Finite Elements Method ◽

Load Redistribution

The objective of this article is to present the results obtained in a study on the interaction between the behavior of the structure and the foundation settlements and verify the influence of normal load distribution on the columns. In this mechanism, known as structure soil interaction (SSI), as the building is constructed, a transfer of loads occurs from the columns which tend to settle more to those that tend to settle less. The study was conducted in a building which had its settlements monitored from the beginning of construction. For this purpose, a linear tridimensional numerical model was constructed and numerical analysis was performed, using the finite elements method. In these analyses, numerical models corre- sponding to the execution of each floor were used, considering the settlements measured in each stage of the construction. The results of analy- ses showed that the effect of SSI are significant for calculating the normal efforts on the columns, particularly on those located in the first floors.

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Numerical analysis of effects of water leakage with loss of fines on concrete tunnel lining

Volcanic Rocks and Soils ◽

10.1201/b18897-57 ◽

2015 ◽

pp. 419-422

Author(s):

G Ren ◽

C Li ◽

Y Tan

Keyword(s):

Numerical Analysis ◽

Tunnel Lining ◽

Water Leakage

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Numerical Analysis of the Contact Behavior of a Polymer-Based Waterproof Membrane for Tunnel Lining

Polymers ◽

10.3390/polym12112704 ◽

2020 ◽

Vol 12 (11) ◽

pp. 2704

Author(s):

Kicheol Lee ◽

Dongwook Kim ◽

Soon-Wook Choi ◽

Soo-Ho Chang ◽

Tae-Ho Kang ◽

...

Keyword(s):

Tensile Strength ◽

Numerical Analysis ◽

Material Properties ◽

Interfacial Adhesion ◽

Laboratory Experiments ◽

Tunnel Lining ◽

Contact Conditions ◽

Contact Behavior ◽

Initial Strength ◽

Interface Parameters

Waterproof membranes have higher initial strength, faster construction, and better waterproofing than conventional sheet membranes. In addition, their polymer constituents have much higher interfacial adhesion and tensile strength than those of conventional materials. However, despite their advantages, waterproof membranes are not widely used in civil construction. This study evaluates the material properties and interface parameters of a waterproof membrane by considering the results of laboratory experiments and numerical analysis. Since the contact behavior of a membrane at its interface with shotcrete is important for understanding the mechanism of the support it offers known as a shotcrete tunnel lining, modeling should adopt appropriate contact conditions. The numerical analysis identifies the suitability and contact conditions of the waterproof membrane in various conditions.

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