Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Analysis of Decomposed Components of Raft and Piles of Piled-Raft Foundation in Sandy Soil
Piled-raft foundation is a concept, which has received increasing recognition in recent years. Due to the complexity of piled-raft system, an accurate design relies on numerical modeling. This study is directed to developing a numerical model to analyze and identify the influence of parameters governing its performance. The developed model was based on the finite element technique and accounts for the interactions of pile-to-pile, pile-to-raft, raft-to-soil, and pile-to-soil. The results produced by the present model were validated with the available data in the literature. The analysis in the present study of decomposed components of raft and piles of piled-raft foundation embedded in sands includes the interaction effects. For this purpose, finite element analysis was performed using PLAXIS 3D for various foundation and soil conditions. A square raft was used to model the piled-raft. The developed model has been used to conduct a sensitivity analysis of the governing parameters that include pile length, pile spacing, and raft thickness. Furthermore, the effects of variations of soil modulus of elasticity, friction angle, dilatancy angle, and unit weight have also been examined. From decomposed load–settlement curves obtained from the analysis, the load-carrying capacity of piles is mobilized earlier than that of the raft, showing higher load-carrying proportion. As settlement further increases, raft tends to carry greater load than the piles. Due to the interactions between raft and piles, the load-carrying capacities of the decomposed components are smaller than those of the unpiled raft and pile group of the same configuration. As pile spacing increases, the load proportion of piles becomes higher.
Analysis of Decomposed Components of Raft and Piles of Piled-Raft Foundation in Sandy Soil
Piled-raft foundation is a concept, which has received increasing recognition in recent years. Due to the complexity of piled-raft system, an accurate design relies on numerical modeling. This study is directed to developing a numerical model to analyze and identify the influence of parameters governing its performance. The developed model was based on the finite element technique and accounts for the interactions of pile-to-pile, pile-to-raft, raft-to-soil, and pile-to-soil. The results produced by the present model were validated with the available data in the literature. The analysis in the present study of decomposed components of raft and piles of piled-raft foundation embedded in sands includes the interaction effects. For this purpose, finite element analysis was performed using PLAXIS 3D for various foundation and soil conditions. A square raft was used to model the piled-raft. The developed model has been used to conduct a sensitivity analysis of the governing parameters that include pile length, pile spacing, and raft thickness. Furthermore, the effects of variations of soil modulus of elasticity, friction angle, dilatancy angle, and unit weight have also been examined. From decomposed load–settlement curves obtained from the analysis, the load-carrying capacity of piles is mobilized earlier than that of the raft, showing higher load-carrying proportion. As settlement further increases, raft tends to carry greater load than the piles. Due to the interactions between raft and piles, the load-carrying capacities of the decomposed components are smaller than those of the unpiled raft and pile group of the same configuration. As pile spacing increases, the load proportion of piles becomes higher.
Analysis of Decomposed Components of Raft and Piles of Piled-Raft Foundation in Sandy Soil
Lecture Notes in Civil Engineering
Satyanarayana Reddy, C. N. V. (Herausgeber:in) / Muthukkumaran, K. (Herausgeber:in) / Satyam, Neelima (Herausgeber:in) / Vaidya, Ravikiran (Herausgeber:in) / Sharma, Tusshar (Autor:in) / Singh, Baleshwar (Autor:in)
27.09.2021
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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