Analysis of Pile Equivalent Anchorage Length for Elevated Pile Caps Under Lateral Load

Abstract eng:
Calculation model of equivalent anchorage length for elevated pile caps under lateral load was proposed based on the invariability of basic period. Pile-soil interaction was considered by elastic subgrade reaction method and using the power series method solved the curve differential equation. Variety rules of anchorage length for elevated pile caps with the changes of soil properties, diameter-spacing ratio of pile, pile-pier stiffness ratio etc. were studied. The empirical equation of pile equivalent fixed length for elevated pile caps under lateral load was given in the paper. The main factors affecting the equivalent anchorage length of pile consist of soil properties and pile-pier stiffness ratio. So the paper can provide some theoretical foundation for simplifying calculation and conceptual design of bridges.

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