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This paper presents a two-dimensional structural model of an exposed column-base,which takes account of initial tensioning of anchor bolts and column axial force. The applicability of this model is confirmed by loading tests on a canti-lever with exposed column-base subjected to horizontal forces. The following observations were made: 1)The model takes account of variation of rotational rigidity due to initial anchor bolts tensioning and axial force of column-base. 2)The model adjusts the maximum bending moment capacity and rotational rigidity by changing the line of action of the compressive force line and rigidity modification coefficient. 3)The result of the present model agrees closely with loading-tests results.

SIMPLE ANALYSIS MODEL FOR EXPOSED COLUMN-BASE CONSIDERING EFFECT OF INITIAL TENSIONING OF ANCHOR BOLTS AND COLUMN AXIAL FORCE