scholarly journals EARTHQUAKE RESPONSE OF PILE FOUNDATION CONSIDERING CONTRIBUTION OF AXIAL-FORCE FLUCTUATION IN PILES

1999 ◽  
Vol 64 (523) ◽  
pp. 79-86 ◽  
Author(s):  
Yuji SAKO ◽  
Yuji MIYAMOTO
Keyword(s):  
Axial Force ◽  
Pile Foundation ◽  
Earthquake Response ◽  
Force Fluctuation

scholarly journals Effect of Axial Force Fluctuation in Supporting Columns on Earthquake Response of Traditional Wooden Japanese Temple

2007 ◽  
Vol 7 (1) ◽  
pp. 14-26 ◽  
Author(s):  
Yusuke MORI ◽  
Takashi SUZUKI ◽  
Kazuyuki IZUNO ◽  
Kenzo TOKI
Keyword(s):  
Axial Force ◽  
Earthquake Response ◽  
Force Fluctuation

scholarly journals EARTHQUAKE RESPONSE OF PILE FOUNDATION IN HONLINEAR LIQUEFIABLE SOIL DEPOSIT

1995 ◽  
Vol 60 (471) ◽  
pp. 41-50 ◽  
Author(s):  
Yuji Miyamoto ◽  
Yuji Sako ◽  
Eiji Kitamura ◽  
Kenji Miura
Keyword(s):  
Pile Foundation ◽  
Earthquake Response ◽  
Liquefiable Soil

scholarly journals Calculation of Negative Frictional Resistance of Foundation Pile in Deep Fill Foundation

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Ningyu Zhao ◽  
Hongjun Wu ◽  
Yi Song ◽  
Shun Xiang
Keyword(s):  
Axial Force ◽  
Pile Foundation ◽  
Frictional Resistance ◽  
Energy Balance Equation ◽  
Calculation Model ◽  
Measured Data ◽  
Hyperbolic Model ◽  
Distribution Law ◽  
Soil System ◽  
Foundation Pile

In deep fill foundations, the pile foundation might suffer from negative frictional resistance (NFR) due to the consolidation and settlement of the soil. The NFR will cause the pile to settle excessively and reduce its bearing capacity. However, there are not yet many accurate methods to calculate the NFR of foundation piles in deep fill foundations. To make up for the gap, this paper carries out shear tests on the pile-soil interface and discusses the mechanism of pile-side frictional resistance. Considering the distribution law of pile-side frictional resistance with depth, the authors proposed a piecewise calculation model for pile-side frictional resistance, which couples the hyperbolic model and effective stress method. Then, the energy balance equation of the pile when the NFR occurs was established in the light of the energy transfer of the pile-soil system during the settlement of the soil around the pile. Furthermore, the calculation formulas of the axial force and displacement of the pile at different depths were derived, considering the pile-soil displacement and the potential energy change of the pile-soil system. The proposed method was applied to calculate the NFR of the foundation pile in a construction site, and the calculated results were compared with the measured data. The results show that the axial force-depth curve of the pile obtained through theoretical calculation agrees well with the measured data. Hence, our method can accurately reveal the mechanical features of the pile foundation in deep fill foundations.

scholarly journals Numerical Simulation Study on Lateral Displacement of Pile Foundation and Construction Process under Stacking Loads

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
Yan-yan Cai ◽  
Bing-xiong Tu ◽  
Jin Yu ◽  
Yao-liang Zhu ◽  
Jian-feng Zhou
Keyword(s):  
Numerical Simulation ◽  
Influencing Factors ◽  
Axial Force ◽  
Pile Foundation ◽  
Large Scale ◽  
Lateral Displacement ◽  
Soft Soil ◽  
Deformation Modulus ◽  
Engineering Project ◽  
Pile Diameter

Lateral displacement of pile foundation is crucial to the safety of an overall structure. In this study, a numerical simulation on the lateral displacement of pile foundation under stacking loads was conducted to determine its relation with different influencing factors. Simulation results demonstrated that stacking loads at the pile side mostly influence the lateral displacement of pile foundation. The lateral displacement of pile foundation increases by one order of magnitude when the stacking loads increase from 100 kPa to 300 kPa. Other influencing factors are less important than stacking loads. Lateral displacements of the pile body and at the pile top can be reduced effectively by increasing the deformation modulus of surface soil mass, reducing the thickness of soft soil, and expanding pile diameter. Our analysis indicates that a nonlinear relationship exists between the lateral displacement at the pile top and the pile diameter. The lateral resistance of the pile body can be enhanced by coupling the stacking load along piles and the axial force at the pile top. An actual large-scale engineering project was chosen to simulate the effects of postconstructed embankment on lateral displacement and axial force of bridge pile foundation under different construction conditions and to obtain the lateral displacement of the pile body and the negative frictional resistance caused by soft soil compression under stacking loads. On the basis of the calculated results, engineering safety and stability were evaluated, and a guide for the design and construction was proposed.

Dynamic Analysis of the Superstructure-Pile Foundation-Soil Interaction System under Earthquake Based on Fuzzy Theory

2011 ◽  
Vol 48-49 ◽  
pp. 461-465
Author(s):  
Bao Lin Xiong ◽  
Chun Jiao Lu
Keyword(s):  
Pile Foundation ◽  
Comprehensive Evaluation ◽  
Fuzzy Theory ◽  
Earthquake Response ◽  
Frequency Domain Method ◽  
Dimensional System ◽  
Foundation Soil ◽  
Soil System ◽  
Interaction System ◽  
Interaction Problem

Based on frequency domain method, the seismic responses of the superstructure-pile foundation-soil system are studied taking the dynamic soil-structure interaction into consideration. For analyzing the earthquake response of cylindrical pile foundation, earthquake response analysis of three-dimensional system of pile foundation-soil-superstructure simplify two-dimensional question. The dynamic responses of the interaction system under EI-Centro ground motion excitation are evaluated by using secondary development of the large general finite analysis software Abaqus. It is shown that pile foundation is more anti-seismic and that pile foundation flexibility can improve the structural basic cycle. Based on a comprehensive assessment theory, soil-superstructure interaction problem under Earthquake is analyzed by second-level evaluation of comprehensive evaluation. By applying comprehensive evaluation method fuzzy theory model of soil-superstructure interaction is built. It is show that fuzzy mathematics method is appropriate for this kind of soil-superstructure interaction problem.

Analisis Daya Dukung Tanah Dan Bahan Pondasi Tiang Pancang Pada Pembangunan Jembatan Kab. Jombang

2020 ◽  
Vol 9 (1) ◽  
pp. 32-37
Author(s):  
Ruslan Hidayat ◽  
Saiful Arfaah
Keyword(s):  
Carrying Capacity ◽  
Pile Foundation ◽  
Heavy Traffic ◽  
Traffic Volume ◽  
Material Strength ◽  
Cone Penetrometer ◽  
The Village

One of the most important factors in the structure of the pile foundation in the construction of the bridge is the carrying capacity of the soil so as not to collapse. Construction of a bridge in the village of Klitik in Jombang Regency to be built due to heavy traffic volume. The foundation plan to be used is a pile foundation with a diameter of 50 cm, the problem is what is the value of carrying capacity of soil and material. The equipment used is the Dutch Cone Penetrometer with a capacity of 2.50 tons with an Adhesion Jacket Cone. The detailed specifications of this sondir are as follows: Area conus 10 cm², piston area 10 cm², coat area 100 cm², as for the results obtained The carrying capacity of the soil is 60.00 tons for a diameter of 30 cm, 81,667 tons for a diameter of 35 cm, 106,667 tons for a diameter of 40 cm, 150,000 tons for a diameter of 50 cm for material strength of 54,00 tons for a diameter of 30 cm, 73,500 tons for a diameter of 35 cm, 96,00 tons for a diameter of 40 cm, 166,666 tons for a diameter of 50 cm

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