Abstract
Up to the present, the lateral stress of pile foundations have been usually designed without superstructure so, from the strict theoretical point of view, the stress and deformation are not considered to be correct. This paper expressed the systematic theory of pile foundation with superstructure by elastic analysis on single layer ground under lateral load. 1. General characteristics of pile foundation are explained not by absolute value but by stress per unit deformation. 2. General characteristics are controlled by non dimensional rotation. θo/(yoβ) or θo/(yoη). 3. Non dimensional rotation is related with ω:the restraint factor of rotation. ω:consists of EcKg(kNm):rigidity of ground beam, E_pI_p(kNm^2):bending rigidity of pile and β or η constant of ground character sties. 4. The stress and deformation of pile foundation are able to be easily calculated using the results of this paper.
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