偏心距对水平受荷双桩基础响应影响

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Abstract A large scale model test of two-pile foundation in saturated silt is carried out to investigate the response under eccentric lateral loading. An ABAQUS numerical model is built and validated by the model test result. The effect of eccentricity of applied lateral loading on the behavior of the foundation is further studied using the validated model. It is found that the applied load-horizontal displacement curves of the pile cap of the two-pile foundation are close to a laterally loaded single pile curve in shape. The lateral stiffness decreases with the increasing eccentricity of the applied load. Eccentricity can induce significant difference in pile-head shearing between the two piles. The pile next to the load point undertakes more shear force and the pile-head shear resistance of another pile can be opposite to its displacement in direction under a certain eccentricity. The torsional rigidity of the individual piles is far greater than that of a corresponding single pile subjected to torsion because of the deflection-torque coupling effect in the piles，but the influence of the coupling effect decreases with the increasing eccentricity. Both torsional and lateral resistances of the individual piles contribute to resist the applied torque；and the contribution of torsional resistances of the individual piles to the applied torque significantly decreases with the increasing applied load.

Key words： pile foundations eccentric lateral load large-scale model test numerical simulation

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	Articles by authors
	KONG Linggang1
	2
	GU Ming1
	2
	CHEN Renpeng1
	2
	CHEN Yunmin1
	2

Cite this article:

KONG Linggang1,2,GU Ming1, et al. INFLUENCE OF ECCENTRICITY ON TWO-PILE FOUNDATION SUBJECTED TO LATERAL LOADING[J]. , 2013, 32(s2): 4174-4182.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/4174

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