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Nonlinear Finite Element Analysis of Rigid Pile Composite Foundation

Author: FengLiangLiang
Tutor: ZuoMaoTianï¼›WangDong
School: Dalian University of Technology
Course: Geotechnical Engineering
Keywords: Nonlinear elasticity Elastoplastic Finite Element Method Composite Foundation Rigid Pile
CLC: TU473.1
Type: Master's thesis
Year: 2006
Downloads: 297
Quote: 4
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Abstract


This paper delves into the constitutive numerical integration algorithms , based on the Duncan-Chang nonlinear elastic model , an algorithm is derived equations of the model , the preparation of the corresponding calculation program . The use of large-scale nonlinear finite element software ABAQUS provides user-defined interface platform - user material subroutine UMAT, it is a very powerful module , but also for non-linear finite element calculation can simulate achieve a Duncan-Chang the constitutive model integration modules. Finally triaxial tests were carried out on a finite element simulation results show that : In this paper, the algorithm is feasible and reasonable. For rigid pile composite foundation in recent years, mainly in the study of soil and pile interaction characteristics , two-dimensional element method also will be used in the composite foundation . This paper uses a Duncan-Chang hyperbolic nonlinear elastic model and Drucker-Prager elastoplastic constitutive model , in order to simulate the soil between the pile and the possible sliding and piercing, the calculation model using contact element to consider piles and between the soil and the interface between the cushion and the pile may occur on the slip and piercing and other non-linear contact characteristics , while the cushion under the pile and the soil were analyzed and calculated . Verified through an engineering example of two constitutive model is reasonable and feasible and thus can be verified . In ABAQUS finite element analysis software framework developed by the second , the establishment of a finite element model by numerical calculation , for foundation settlement , soil stress ratio of pile body piercing cushion volume, foundation settlement characteristics change over time comparative analysis , in order to discuss the rigid pile composite foundation performance for rigid pile composite foundation design to provide a reference .

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > Pile foundation and deep foundation > Pile
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