鉄骨鉄筋コンクリート構造柱脚部のベースプレートの応力伝達機構

概要

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To make clear the function of the base plate concerning the mechanism of the stress transfer from the steel element of composite column to the footing, thirteen specimens were tested under monotonic and/or repeated horizontal load with constant axial load. Each specimen has wedge-shaped slit in order to prevent the contact between the steel flange element and the surrounding reinforced concrete element. The reinforcement ratio of column is 0.884% and 2.22%. The applied axial load is 0%, 10% and 20% of the ultimate compressive strength. The effect of the anchor bolts is also examined. The ultimate strength of the steel column base is much dependent on the flexural resistance of the base plate. The function of the base plate is caused by the restraining force of surrounding concrete which is transferred to the footings by the flexural reinforcement. Ultimate strength formula was proposed. Preditions were shown to be in good agreement with the test results.
一般社団法人日本建築学会の論文