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Performance functions for laterally loaded single concrete piles in homogeneous clays
Gokhan mancli,M. Rifat Kahyaoglu,Gurkan Ozden,Arif S. Kayalar 국제구조공학회 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.33 No.4
A key parameter in the design of a laterally loaded pile is the determination of its performance level. Performance level of a pile is usually expressed as the maximum head deflection and bending moment. In general, uncertainties in the performance of a pile originates from many factors such as inherent variability of soil properties, inadequate soil exploration programs, errors taking place in the determination of soil parameters, limited calculation models as well as uncertainties in loads. This makes it difficult for practicing engineers to decide for the reliability of laterally loaded piles both in cohesive and cohesionless soils. In this paper, limit state functions and consequent performance functions are obtained for single concrete piles to predict the maximum bending moment, a widely accepted design criterion along with the permissible pile head displacement. Analyses were made utilizing three dimensional finite element method and soil-structure-interaction (SSI) effects were accounted for.
Numerical Analyses of Piles Subjected to Lateral Soil Movement
Mehmet Rifat Kahyaoglu,Gökhan Imançli,Okan Önal,Arif S. Kayalar 대한토목학회 2012 KSCE Journal of Civil Engineering Vol.16 No.4
Load transfer to piles due to the relative movement between the piles and the moving soil is a fairly complex soil-pile interaction problem. Different analysis methods are available in literature to estimate the loads on piles. However, the predicted loads on the piles calculated by these methods vary due to insufficient representation of loading conditions and ignoring relative pile and soil movement. In this paper, three dimensional finite element analyses have been performed to evaluate the load transfer mechanism of free head passive pile groups in purely cohesionless soils. Numerical analyses are classified to address two most common passive pile cases, namely piles adjacent to embankments and piles used for slope stabilization. The effects of relative pile and soil displacement, pile spacing and pile arrangement on soil arching are investigated by numerical simulations. It is observed that load transfer decreases parallel to a decrease in pile spacing for piles adjacent to embankments contrary to piles used for slope stabilization.
Performance functions for laterally loaded single concrete piles in homogeneous clays
Imancli, Gokhan,Kahyaoglu, M. Rifat,Ozden, Gurkan,Kayalar, Arif S. Techno-Press 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.33 No.4
A key parameter in the design of a laterally loaded pile is the determination of its performance level. Performance level of a pile is usually expressed as the maximum head deflection and bending moment. In general, uncertainties in the performance of a pile originates from many factors such as inherent variability of soil properties, inadequate soil exploration programs, errors taking place in the determination of soil parameters, limited calculation models as well as uncertainties in loads. This makes it difficult for practicing engineers to decide for the reliability of laterally loaded piles both in cohesive and cohesionless soils. In this paper, limit state functions and consequent performance functions are obtained for single concrete piles to predict the maximum bending moment, a widely accepted design criterion along with the permissible pile head displacement. Analyses were made utilizing three dimensional finite element method and soil-structure-interaction (SSI) effects were accounted for.