Effect of cross-section shape on the lateral response of steel piles

Abstract

Abstract: Current researches on pile withspecial-shaped sections mainly focus on the vertical bearing capacity of cast-in-place concrete piles, but there is little research on thelateral response of thin-walled steel piles with special-shaped sections. By means of numerical simulation, this paper presents an extensive study on the lateral response of steel piles with three different cross-section shapes (including the circular pipe pile, square hollow pile and X-section pile) and two different aspect ratios (the ratio of pile embedded length to the outer diameter or width). The results show that: for semi-rigid piles, compared with that of the pipe pile having the same displacement at the pile head, the bearing capacity of the square hollow pile increases about 9% and X-section pile increases up to 11%. for flexible piles, with a given pile head displacement, the bearing capacity of square hollow pile is about 15% higher than that of pipe pile and X-section pile. Furtherly, this paper discusses the merit and demerit ofthese three cross-section pile by comparing their displacement and bending moment, from which, the relationships betweem them are developed to aid the industrial design.

Key words: pile foundation, cross-section shape, lateral load, numerical simulation, sandy soil

CLC Number:

LI Wei-chao, GE Bin, YANG Min. Effect of cross-section shape on the lateral response of steel piles[J]. Journal of Lanzhou University of Technology, 2020, 46(4): 133-138.

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