钢管混凝土核心柱轴压组合性能分析

ANALYSES ON COMPOSITE COLUMN WITH INSIDE CONCRETE FILLED STEEL TUBE UNDER AXIAL COMPRESSION

对于钢管混凝土核心柱,核心钢管混凝土和外围普通混凝土的受压性能存在明显差异,本文分析了外围混凝土体积配箍率等因素对柱协同工作的影响,推导出了临界状态时外围混凝土柱的配箍率,并与试验值进行对比,吻合良好。

A composite column with inside concrete filled steel tube may have advantages over either pure steel or reinforced concrete columns, with the inner concrete enhancing the stability , the tube confining the concrete core to a triaxial stress state, and the outer concrete protecting the steel tube from high temperature, corrosion, etc. But the reaction to axial compressive load is different between reinforced concrete column and column with inside concrete filled steel tube . This paper presents analyses of the influences of the transverse reinforcement ratio on the function of the composite column. The transverse reinforcement ratio in critical state is derived , and found to be in good agreement with test data.