- 摘 要
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王力尚 錢稼茹 （清華大學土木工程系 北京 100084）
[提要] 22根鋼管高強混凝土柱的軸向受壓試驗結果表明，鋼管高強混凝土短柱的軸向受壓破壞為剪切破壞，長柱的破壞為彎曲破壞。根據(jù)試驗和有關文獻的結果，提出了混凝土強度等級不大于C80、套箍指標不大于1.1的鋼管高強混凝土柱的軸向受壓承載力計算公式，以及長柱軸向受壓承載力折減系數(shù)計算公式。
[關鍵詞] 鋼管高強混凝土柱 軸向受壓 承載力折減系數(shù) 套箍指標Experimental study on 22 steel tube confined high-strength concrete columns was carried out under the axial compressive load. The test results showed that the short columns failed due to shear failure of core concrete, the long columns failed due to flexure. Based on the test results of this study and others, a formula for calculating the axial compressive strength of short steel tube confined high-strength concrete columns,as well as the strength reduction factor for long columns are proposed. The formula and the factor are suitable for the grade of core concrete not larger than C80 and the steel tube confinement index not larger than l.1.
Keywords: steel tube confined high-strength concrete column; axial compression; strength reduction factor; steel tube confinement index
