鋼管高強混凝土應力-應變?nèi)€試驗研究*
王力尚 錢稼茹
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（清華大學土木工程系 北京 100084）
［提要］ 通過22根鋼管高強混凝土柱的軸壓試驗，驗證了高強混凝土結構技術規(guī)程有關鋼管高強混凝土構件初始壓縮剛度的算式。研究給出套箍指標為0.28~1.1的鋼管高強混凝土峰值應力、峰值應變、平臺應力（即殘余應力）、平臺初始應變的算式；給出了鋼管高強混凝土應力(應變?nèi)€方程及曲線參數(shù)的建議公式。［關鍵詞］ 鋼管高強混凝土;峰值應力;峰值應變;平臺應力;應力-應變?nèi)€Abstract: Experiment on axially loaded 22 steel tube confined high-strength concrete columns (STCC) was carried out．The formula for the initial compressive stiffness of STCC proposed by Technical specification of high-strength concrete structures is verified．The empirical formulas for peak stress，peak strain，plateau stress and the strain at the starting point of plateau of steel tube confined high-strength concrete with the confinement index of 0.28~1.1 are obtained．The equation for complete axial compressive stress-strain curve of steel tube confined high-strength concrete and its parameters are suggested．Keywords：Steel tube confined high-strength concrete; peak strength; peak strain; plateau stress; stress-strain curve
