A numerical model for the dynamic analysis of inclined pile groups

2015 ◽  
Vol 45 (1) ◽  
pp. 45-68 ◽  
Author(s):  
Francesca Dezi ◽  
Sandro Carbonari ◽  
Michele Morici
Keyword(s):  
Numerical Model ◽  
Dynamic Analysis ◽  
Pile Groups ◽  
Inclined Pile

Efficient numerical model for the computation of impedance functions of inclined pile groups in layered soils

2016 ◽  
Vol 126 ◽  
pp. 379-390 ◽  
Author(s):  
Guillermo M. Álamo ◽  
Alejandro E. Martínez-Castro ◽  
Luis A. Padrón ◽  
Juan J. Aznárez ◽  
Rafael Gallego ◽  
...  
Keyword(s):  
Numerical Model ◽  
Layered Soils ◽  
Pile Groups ◽  
Inclined Pile ◽  
Impedance Functions

scholarly journals Numerical modeling of reinforced concrete structures: static and dynamic analysis

2013 ◽  
Vol 66 (4) ◽  
pp. 425-430 ◽  
Author(s):  
Jorge Luis Palomino Tamayo ◽  
Armando Miguel Awruch ◽  
Inácio Benvegnu Morsch
Keyword(s):  
Reinforced Concrete ◽  
Numerical Model ◽  
Finite Elements ◽  
Dynamic Analysis ◽  
Time Integration ◽  
Great Accuracy ◽  
Constitutive Law ◽  
Published Data ◽  
Static And Dynamic Analysis ◽  
Plates And Shells

A numerical model using the Finite Element Method (FEM) for the nonlinear static and dynamic analysis of reinforced concrete (RC) beams, plates and shells is presented in this work. For this purpose, computer programs based on plasticity theory and with crack monitoring capabilities are developed. The static analysis of RC shells up to failure load is carried out using 9-node degenerated shell finite elements while 20-node brick finite elements are used for dynamic applications. The elasto-plastic constitutive law for concrete is coupled with a strain-rate sensitive model in order to take into account high loading rate effect when transient loading is intended. The implicit Newmark scheme with predictor and corrector phases is used for time integration of the nonlinear system of equations. In both cases, the steel reinforcement is considered to be smeared and represented by membrane finite elements. Various benchmark examples are solved with the present numerical model and comparisons with other published data are performed. For all examples, the path failure, collapse loads and failure mechanism is reproduced with great accuracy.

Soil-structure interaction effects in single bridge piers founded on inclined pile groups

2017 ◽  
Vol 92 ◽  
pp. 52-67 ◽  
Author(s):  
Sandro Carbonari ◽  
Michele Morici ◽  
Francesca Dezi ◽  
Fabrizio Gara ◽  
Graziano Leoni
Keyword(s):  
Soil Structure ◽  
Interaction Effects ◽  
Bridge Piers ◽  
Soil Structure Interaction ◽  
Pile Groups ◽  
Structure Interaction ◽  
Inclined Pile

Expanded superposition method for impedance functions of inclined-pile groups

2015 ◽  
Vol 40 (2) ◽  
pp. 185-206 ◽  
Author(s):  
M. Saitoh ◽  
L. A. Padrón ◽  
J. J. Aznárez ◽  
O. Maeso ◽  
C. S. Goit
Keyword(s):  
Superposition Method ◽  
Pile Groups ◽  
Inclined Pile ◽  
Impedance Functions

scholarly journals Numerical analysis of reducing tunneling effect on viaduct piles foundation by jet grouted wall

2021 ◽  
Vol 15 (1) ◽  
pp. 75-86
Author(s):  
Kamel Asker ◽  
Mohmed Tarek Fouad ◽  
Mohamed Bahr ◽  
Ahmed El-Attar
Keyword(s):  
Numerical Model ◽  
Interaction Mechanism ◽  
Back Analysis ◽  
Bending Moment ◽  
Pile Group ◽  
Tunneling Effect ◽  
Shield Tunnel ◽  
Pile Groups ◽  
Perfectly Plastic ◽  
Jet Grouting

Purpose. The target of this study is divided into two parts. The first part is concerned with capability of numerical model to simulate the tunneling process. The second part is related to studying the interaction mechanism between the tunnel, protection technique, and soil. This study themes are investigated by analyzing different protection technique configuration, considering different stiffness of the grouted wall, and applying different interface coefficient between the wall and the soil. Methods. The method used in this study to check the accuracy of the proposed numerical model is 4-D ABAQUS program. The typical excavation of a tunnel is simulated step by step with an assumed rate of tunnel advancement (0.5 to 1.5 m/hr). The soil material utilized in this model is elastic perfectly plastic (the Mohr-Сoulomb criterion), while elastic material is modeled as solid element (S4R) adopted for lining, grouting, filling gaps, shielding, constructing piles, and jet grouted wall. Findings. Results showed that the closer jet grouting to the tunnel with embedded length of 1.5 times tunnel diameter, the better effect on reducing the lateral deformation and bending moment generated on piles. Otherwise, increasing wall thickness more than double grouted column diameter would not affect its shielding efficiency. Furthermore, either increasing or decreasing friction coefficient even if rough between the grouted wall and soil had no effect on the pile behavior. Additionally, applying Mohr-Coulomb criteria for grouted wall with high stiffness allowed realistic response of the pile group. Originality.Capability of the proposed model is verified by back analysis of Changsha Subway Line 1 project, where the shield tunnel would be constructed near existing pile groups of L off-ramp of the Xinzhong Road viaduct. Practical implications. Increasing grouted wall configuration is more effective than mechanical properties or its interface coefficient with surrounded soil in mitigating tunneling effect on nearby piles. Keywords: tunneling, jet grouting, gield measurements, ABAQUS, Changsha Subway Line 1

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