The Stochastic Dynamic Reliability Research on Nonlinear Pile-Soil-Structure Interaction System with Uncertain Parameters

2011 ◽  
Vol 243-249 ◽  
pp. 5764-5767
Author(s):  
Ai Hong Zhou ◽  
Ying Yuan ◽  
Bai Qing Xu
Keyword(s):  
Pile Foundation ◽  
Soil Structure ◽  
Soil Structure Interaction ◽  
Stochastic Dynamic ◽  
Uncertain Parameters ◽  
Soil Material ◽  
Dynamic Reliability ◽  
Structure Interaction ◽  
Material Parameters ◽  
Interaction System

According to the damage characteristics of pile-soil-structure interaction system subjected to the earthquake, the seismic design method of using the dual design guideline of strength and deformation and taking the same reliability for both pile foundation and superstructure was put forward. The stochastic dynamic reliability of pile-soil-structure interaction system with uncertain parameters was studied on the basis of the randomness of earthquake, the nonlinearity of soil material parameters, and especailly the variability of soil material parameters. The results show that the control indexes of pile foundation and superstructure decreases with the increases of failure probability and the variation of material parameters will make the pile foundation structure partial unsafe.

The Stochastic Seismic Response Analysis on Nonlinear Pile-Soil-Structure Interaction System with Uncertain Parameters

2011 ◽  
Vol 243-249 ◽  
pp. 3940-3944
Author(s):  
Ai Hong Zhou ◽  
Ying Yuan ◽  
Ji Hua Chen
Keyword(s):  
Seismic Response ◽  
Vibration Analysis ◽  
Soil Structure ◽  
Soil Structure Interaction ◽  
Equivalent Linearization ◽  
Uncertain Parameters ◽  
Structure Interaction ◽  
Material Parameters ◽  
Interaction System ◽  
Stochastic Seismic Response

In order to solve the problem of the analysis of seismic response for nonlinear pile-soil-structure interaction system with uncertain parameters subjected to stochastic external excitation, a simple and practical method was proposed in this paper, and the corresponding plug-in program was developed on the platform of universal software ANSYS. Firstly, the stochastic vibration analysis was converted into the definite harmonic vibration analysis accurately by means of the pseudo-excitation method. Secondly, perturbation theory of small parameter was introduced to consider the uncertain material parameters and direct interpolation equivalent linearization model was used to simulate the nonlinearity of material. Finally, the effects of the variability of shear modulus, damping ratio, density and Poisson’s ratio on the stochastic seismic response of the pile-soil-structure interaction system are studied. The results show that the variability coefficients of the response have the same magnitude as the input material parameters and the influence of the variability of material parameters on the response magnitude can’t be ignored.

On the Soil-Structure Interaction Numerical Study of Strengthening Design of Sluice within Mining Subsidence Areas

2010 ◽  
Vol 163-167 ◽  
pp. 3640-3644
Author(s):  
Hong Chang ◽  
Jun Wu Xia ◽  
Hong Fei Chang ◽  
Feng Jie Zhang
Keyword(s):  
High Pressure ◽  
Pile Foundation ◽  
Soil Structure ◽  
Numerical Study ◽  
Mining Subsidence ◽  
Soil Structure Interaction ◽  
Analysis Model ◽  
Structure Interaction ◽  
Jet Grouting ◽  
The Stability

Finite element models, established using ANSYS, given the soil - structure interaction phenomena produced at the interface between the reinforced concrete structure and the soil, have been used to perform a parametric study of the strengthening design of the foundation and the sluice chamber within mining subsidence area. High pressure jet grouting pile is adopted to reinforce the foundation, this analysis model is simplified by the transformation from the pile foundation to the solid foundation, which reflects the characteristic of pile foundation. The strengthening design of the sluice chamber is a renovation from open style to frame, to increase the integral property. It is indicated that, using high pressure jet grouting pile to reinforce the foundation can apparently improve the stability of sluice in mining area. Nevertheless, it can't improve the stability of sluice through reinforcing the sluice chamber.

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