Abstract

A few tests and studies had been carried on in order to clarify the appraising method of elastic rotative rigidity and ultimate resistance moment of an uncovered column base in a posttension system with a cast steel base plate. The test method is to measure elastic rotative rigidity and ultimate resistance moment when the column, which is welded with a cast steel base plate connected with anchor bolts on a foundation of reinforced concrete and expanded mortar, is horizontally and axially loaded at the top. As a result, an appraising formula for elastic rotative rigidity and ultimate resistance moment of the column base in this system was derived.

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