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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Implementation of Hypoplasticity for Fast Lagrangian Simulations

Implementation of Hypoplasticity for Fast Lagrangian Simulations

Tanseng, Pornpot

Paperback

Series: Advances in Geotechnical Engineering and Tunneling, Book 10

General Science

Currently unavailable to order

ISBN10: 3832510737
ISBN13: 9783832510732
Publisher: Logos Verlag Berlin
Published: Dec 15 2005
Pages: 142
Weight: 0.55
Height: 0.41 Width: 6.61 Depth: 9.41
Language: English
The hypoplastic constitutive equations by Wu with and without structure tensor and by von Wolffersdorff were implemented in the finite element with explicit integration program FLAC. The influence of material nonlinearity, mass density and damping factor on numerical solutions with the explicit method were studied and reported. The implementation of hypoplasticity by Wu in FLAC was selected to simulate some laboratory tests i.e. biaxial test and simple shear test. The implementation was also used to simulate some typical geotechnical problems i.e. a spread footing on cohesionless soil, a trapdoor problem and an unlined circular tunnel. The results obtained with hypoplasticity agreed well with analytical solutions and experimental results. The hypoplastic constitutive equations and an elasto-plastic one with Mohr-Coulomb failure criterion were used to simulate normally consolidated Bangkok Clay. The hypoplasticity by Wu was selected for modelling of shield tunnelling in Bangkok Clay because the model gives good predictions of the undrained behavior. The earth pressure coefficient at rest K0 used in the shield tunnelling simulations with FLAC is higher than the K0 obtained from the Jaky's formula. The shield tunnelling was modelled by using actual dimensions from the construction records to generate the mesh. The surface settlements from the simulations are close to the observations. The empirical method by Peck underpredicts the surface settlements from observations.

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