Abstract:

The anchorage, which is embedded into the non-homogeneous stratum in most cases, is divided into a series of sub-anchorage segments. The closed form solution for every segment is deduced based on Winkler’s assumption which is widely accepted in the analysis of interaction between the inclusive and ground. At the same time, the solution for the whole anchorage is also gained according to the continuum and compatible condition between the conjoint segments; and a general analysis program is developed for the tension anchor and compression anchor. It is indicated that the proposed solution is practicable by analyzing a compression anchor and a tension anchor, which are placed into non-homogeneous stratum and tested elaborately in site by Kim in 2003 under the multiple load-cases. Especially, the results are more reasonable for the tension anchor when the action between the tendon and grout is taken into account properly.

Key words: prestressed anchor, Winkler’s assumption, non-homogeneous stratum, sub-anchorage segment