Full Text:   <602>

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CLC number: TU4

On-line Access: 2018-08-03

Received: 2017-09-04

Revision Accepted: 2018-02-23

Crosschecked: 2018-07-09

Cited: 0

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Citations:  Bibtex RefMan EndNote GB/T7714


Hans Henning Stutz


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Journal of Zhejiang University SCIENCE A 2018 Vol.19 No.8 P.624-637


Hypoplastic modeling of soil-structure interfaces in offshore applications

Author(s):  Hans Henning Stutz, Frank Wuttke

Affiliation(s):  Department of Engineering, Aarhus University, Aarhus 8000, Denmark; more

Corresponding email(s):   hhs@eng.au.dk

Key Words:  Hypoplasticity, Interfaces, Cyclic loading, Fine and coarse grained soils

Hans Henning Stutz, Frank Wuttke. Hypoplastic modeling of soil-structure interfaces in offshore applications[J]. Journal of Zhejiang University Science A, 2018, 19(8): 624-637.

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author="Hans Henning Stutz, Frank Wuttke",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

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%T Hypoplastic modeling of soil-structure interfaces in offshore applications
%A Hans Henning Stutz
%A Frank Wuttke
%J Journal of Zhejiang University SCIENCE A
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%P 624-637
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%DOI 10.1631/jzus.A1700469

T1 - Hypoplastic modeling of soil-structure interfaces in offshore applications
A1 - Hans Henning Stutz
A1 - Frank Wuttke
J0 - Journal of Zhejiang University Science A
VL - 19
IS - 8
SP - 624
EP - 637
%@ 1673-565X
Y1 - 2018
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1700469

Cyclic and monotonic loaded offshore structures (e.g. piles, pipelines, cables, and suction-buckets) must be designed and calculated considering the effects of the soil-structure interaction. An advanced constitutive soil model must be used, but a simplified Mohr-Coulomb friction law is applied for the soil-structure interface. The Mohr-Coulomb model is a simple bilinear friction model that cannot take into account monotonic and cyclic interface phenomena. These include hardening, softening, and stiffness degradation under loading. However, we propose two advanced hypoplastic interface models for fine- and coarse-grained soils with intergranular strain concept. The intergranular strain concept has been proven to be an efficient way to model the small-strain deformation and un/reloading behavior of soils. The intergranular strain concept is therefore used to enhance the prediction capabilities of the hypoplastic interface models. Differences of the recent model formulation compared with previous versions are presented and discussed based on simulation. This is followed by an application of different models in finite-element simulations. The new models are used to simulate cyclic direct shear interface tests. Furthermore, the advanced interface model is used for simulation of a torodial penetrometer penetration problem. Several aspects, which are particularly important for offshore structures, are compared with the simple Mohr-Coulomb friction model.

The paper discusses modelling of the interface in soil-structure interaction problems and compares the performance of the Mohr Coulomb model that is typically used with a hypoplastic interface model.


创新点:1. 基于先前的亚塑性模型,通过将晶粒间应变的概念融入模型公式来模拟循环载荷. 2. 整体性较好的模型具有更好、更精确的模拟结果.
方法:1. 采用一种砂浆接触的力学方法,其中一个表面作为主面,另一个表面作为从属面. 2. 采用砂浆接触的力学方法并结合用户定义的子程序,对土壤-结构界面进行建模. 3. 基于先前的亚塑性模型,将晶粒间应变的概念融入模型公式来模拟循环载荷.
结论:1. 整体性较好的模型具有更好、更精确的模拟结果. 2. 本文提出的土壤-结构界面建模方法不仅提高了模拟结果,且在某些模拟中提高了数值收敛性.


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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