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Seismic Analysis of Soil-Pile-Structure System in Stratified Ash-Soil Deposit
The present study deals with the seismic analysis of soil-pile-structure system in a stratified soil deposit subjected to EI Centro (Mw: 6.9), Northridge Santa Monica (Mw: 6.7), and San Fernando (Mw: 6.5) earthquakes. The influence of pile diameter (0.5 and 1.0 m) and shape has been considered for the analysis. The soil profile having fly ash as top layer followed by weathered soil and weathered rock of thickness 8 m, 10 m, and 10 m, respectively, was considered for the study. The response analysis has been done using finite element software SoilWorks. The results are presented in the form of displacement, velocity, and acceleration time histories. Pile responses have also been recorded in form of axial force, shear force, and bending moment for better design of pile foundation. Amplification in acceleration value has been noticed within the fly ash layer as compared to soil for the soil-pile-structure system under different earthquakes. This amplification in acceleration is due to low modulus of elasticity of fly ash layer, and the acceleration in the case of pile diameter 1.0 m is high as compared to pile diameter 0.5 m. The acceleration and velocity response show high magnitude for Northridge earthquake when moving away from footing center. Bending moment shows its maximum peak at the interface of fly ash and weathered soil. The results of the study are very much useful for safe design of pile foundation in ash-soil deposit.
Seismic Analysis of Soil-Pile-Structure System in Stratified Ash-Soil Deposit
The present study deals with the seismic analysis of soil-pile-structure system in a stratified soil deposit subjected to EI Centro (Mw: 6.9), Northridge Santa Monica (Mw: 6.7), and San Fernando (Mw: 6.5) earthquakes. The influence of pile diameter (0.5 and 1.0 m) and shape has been considered for the analysis. The soil profile having fly ash as top layer followed by weathered soil and weathered rock of thickness 8 m, 10 m, and 10 m, respectively, was considered for the study. The response analysis has been done using finite element software SoilWorks. The results are presented in the form of displacement, velocity, and acceleration time histories. Pile responses have also been recorded in form of axial force, shear force, and bending moment for better design of pile foundation. Amplification in acceleration value has been noticed within the fly ash layer as compared to soil for the soil-pile-structure system under different earthquakes. This amplification in acceleration is due to low modulus of elasticity of fly ash layer, and the acceleration in the case of pile diameter 1.0 m is high as compared to pile diameter 0.5 m. The acceleration and velocity response show high magnitude for Northridge earthquake when moving away from footing center. Bending moment shows its maximum peak at the interface of fly ash and weathered soil. The results of the study are very much useful for safe design of pile foundation in ash-soil deposit.
Seismic Analysis of Soil-Pile-Structure System in Stratified Ash-Soil Deposit
Lecture Notes in Civil Engineering
Sitharam, T.G. (editor) / Pallepati, Raghuveer Rao (editor) / Kolathayar, Sreevalsa (editor) / Ram, Amit Kumar (author) / Mohanty, Supriya (author)
2021-03-27
12 pages
Article/Chapter (Book)
Electronic Resource
English
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