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A Study on Settlement Variation in Piled Raft Foundation Under Seismic Loads
Piled raft foundations are usually used to transmit the loads from superstructure to the soil beneath the structure having low or medium bearing capacity to hard or rock strata with a higher bearing capacity and stiffness. This paper investigates the influence of the length and stiffness of the piles on the performance of the raft foundation. For this, a ten storey moment-resisting frame resting on piled raft foundation with different pile length was simulated numerically. Three-dimensional numerical model of the soil medium, piles, raft and the structural elements were created in ANSYS software. Four bay 10 storey building frames having 3 m bay length and storey height of 3 m is with different pile configurations are considered for the study. The column size of 0.5 m × 0.5 m and beam size of 0.3 m × 0.45 m were taken for frames. The dimension of the raft foundation is 14mx14mx1m. This study mainly focuses on the vertical settlement of the raft at various locations along the length of the raft foundation when subjected to El Centro earthquake and time history corresponding to response spectrum given in IS 1893 code. Study was conducted on five types of pile configuration based on pile length. It was found that the settlement at the edges of the raft is minimum for model M1 which is having longest peripheral pile and minimum settlement at the centre is observed for model M5 which has longer central pile compared to peripheral piles.
A Study on Settlement Variation in Piled Raft Foundation Under Seismic Loads
Piled raft foundations are usually used to transmit the loads from superstructure to the soil beneath the structure having low or medium bearing capacity to hard or rock strata with a higher bearing capacity and stiffness. This paper investigates the influence of the length and stiffness of the piles on the performance of the raft foundation. For this, a ten storey moment-resisting frame resting on piled raft foundation with different pile length was simulated numerically. Three-dimensional numerical model of the soil medium, piles, raft and the structural elements were created in ANSYS software. Four bay 10 storey building frames having 3 m bay length and storey height of 3 m is with different pile configurations are considered for the study. The column size of 0.5 m × 0.5 m and beam size of 0.3 m × 0.45 m were taken for frames. The dimension of the raft foundation is 14mx14mx1m. This study mainly focuses on the vertical settlement of the raft at various locations along the length of the raft foundation when subjected to El Centro earthquake and time history corresponding to response spectrum given in IS 1893 code. Study was conducted on five types of pile configuration based on pile length. It was found that the settlement at the edges of the raft is minimum for model M1 which is having longest peripheral pile and minimum settlement at the centre is observed for model M5 which has longer central pile compared to peripheral piles.
A Study on Settlement Variation in Piled Raft Foundation Under Seismic Loads
Lecture Notes in Civil Engineering
Kolathayar, Sreevalsa (editor) / Chian, Siau Chen (editor) / Krishna, S. Vinoda (author) / Jayalekshmi, B. R. (author)
2021-09-21
9 pages
Article/Chapter (Book)
Electronic Resource
English
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