Chandra S Goit

Chandra S Goit
Saitama University · Department of Civil and Environmental Engineering

PhD

About

27
Publications
2,915
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169
Citations

Publications

Publications (27)
Article
Dynamic experimental studies on the active lengths of a fixed-head floating pile under static and dynamic loading conditions are reported, focusing on the effects of local nonlinearity and resonant behavior of soil. Results obtained from the laterally loaded model soil-pile system subjected to low-to-high amplitude pile head loading suggest a stron...
Article
Horizontal impedance functions of inclined single piles are measured experimentally for model soil-pile systems with both the effects of local soil nonlinearity and resonant characteristics. Two practical pile inclinations of 5° and 10° in addition to a vertical pile embedded in cohesionless soil and subjected to lateral harmonic pile head loadings...
Article
The effects of soil nonlinearity on the dynamic behavior of fixed-head floating inclined pile groups are investigated experimentally in the form of horizontal impedance functions (IFs) and internal forces in piles. A 2x2 model of inclined pile groups embedded in dry cohesionless soil and subjected to a broad range of lateral harmonic loadings at th...
Article
Model tests on fixed-head floating piles embedded in dry cohesionless soil (Gifu sand) are carried out under 1-g conditions on a shaking table, to investigate the effects of local soil nonlinearity on the dynamic response of pile groups. Results obtained from these tests are employed to assess the applicability of Poulos׳ superposition method in de...
Conference Paper
Full-text available
Numerical investigations to obtain the kinematic response of piles in soil under vertical dynamic loading using three-dimensional finite element modelling were carried out in the time domain. A numerical model was validated against the available solutions for end-bearing single piles. Based on this validation, the model for floating single pile was...
Article
Full-text available
The overlapping displacement fields among closely spaced piles termed as pile-to-pile interactions, increase the overall settlement of pile groups. Resultantly, under static loading, these interactions invariably decrease the group stiffness of piles than the collective stiffnesses of corresponding single piles. Whereas under dynamic loading, the g...
Conference Paper
Full-text available
This paper presents a finite-element (FE) analysis for simulating the rate-dependent characteristics of a laterally loaded single pile foundation system. A scaled single pile model embedded in dry sand subjected to different rates of lateral pseudo-static and cyclic loadings is considered for numerical modelling. Numerical analysis is carried out u...
Article
Full-text available
Physical-scaled model testing under 1 g conditions is carried out in obtaining the vertical response of fixed head floating-inclined single piles embedded in dry sand. Practical pile inclinations of 5° and 10° besides a vertical pile (0°) subjected to static and dynamic vertical pile head loadings are considered. To account for the effects of soil...
Article
Full-text available
The loading rate effect on a single pile subjected to cyclic lateral loads is studied experimentally and numerically. In the experiment, a scaled model pile embedded in cohesionless sand is housed in a laminar shear box under 1g condition. Loads are applied with a horizontal actuator rigidly connected to the pile-head allowing only horizontal trans...
Article
Full-text available
This paper investigates the frequency-dependent pile-head impedance characteristics of a model soil-pile foundation system under large amplitude loads, inducing soil yielding. Testing was conducted on a scaled single pile embedded in sand under a 1g condition. A laminar shear box mounted on a unidirectional shaking table was used to house the soil-...
Chapter
An experimental investigation to evaluate the effective foundation input motion (EFIM) of a soil-steel pipe sheet pile (SPSP) foundation system under 1g conditions was carried out through scaled model testing on a shaking table. The scaled model with 20 piles interlocked together to form a circular assembly was embedded in dry cohesionless Gifu san...
Article
In recent years, Japan has experienced an increasing number of short-period-dominated, high-acceleration earthquake motions. These strong motions, however, have caused only a limited damage to structures founded on piles. Among the possible reasons for the limited damage is the earthquake motion filtering effect of pile foundations. This filtering...
Article
Frequency and intensity dependent dynamic response behavior of soil-steel pipe sheet pile (SPSP) foundation and superstructure supported on it is studied in this work considering the soil-structure interactions (SSI) effect through experimental investigation by utilizing a physical scaled model of soil-SPSP foundation-superstructure (S-SPSP-S) syst...
Article
A simplified analytical formulation has been used to verify the superposition method of two components of soil-structure interactions (SSI), namely-the kinematic interaction and the inertial interaction for estimating the dynamic response of soil-pile-structure systems (SPSS). The dynamic response analysis is conducted in the frequency domain and t...
Article
An analytical solution is developed for the kinematic response of a group of end-bearing fixed-head cylindrical vertical piles embedded in a homogeneous elastic stratum subjected to vertically-propagating harmonic shear waves. Pile-soil interaction, incorporating group effects in a pile group, is represented through a simplified beam-on-dynamic-Win...
Article
The vertical response of a fixed-head floating single pile embedded in sand is obtained experimentally under 1g conditions. Specifically, pile head stiffnesses and axial strains generated along the pile length for a range of static and dynamic pile head loadings are measured. To account for the effects of soil non-linearity on the static response o...
Article
Dynamic tests on model soil-pile systems under 1g (natural gravity) conditions are carried out to assess the effects of soil non-linearity on the horizontal pile-to-pile interaction factors of inclined piles. This paper examines 2×2 symmetric free-head floating inclined pile groups embedded in cohesionless soil and subjected to a low-to-high amplit...
Article
This paper presents a superposition method expanded for computing impedance functions (IFs) of inclined-pile groups. Closed-form solutions for obtaining horizontal, vertical, and rocking IFs, estimated by using pile-to-pile interaction factors, are proposed. IFs of solitary inclined piles, crossed IFs, and explicit incorporation of compatibility co...
Article
Full-text available
Dynamic experimental studies of response curves of laterally loaded model soil-pile-structure systems subjected to strong ground motion possesses great importance in understanding the response of actual pile supported structures subjected to the earthquake loadings. Model tests on instrumented pile groups for the non-embedded footing case have been...

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Project (1)
Project
Dynamic behavior of piles with frequency and intensity of loads