【摘要】 为给辽宁省地方标准的编制提供依据对钢管高性能混凝土压弯构件的静力性能展开研究。通过对24个试件(内填自密实混凝土的立方试块抗压强度标准值为96 MPa)的静力试验,发现钢管高性能混凝土压弯构件的轴力-挠度曲线可以分为弹性阶段、弹塑性阶段和下降段。试件挠曲线接近正弦半波曲线,钢管纵向应变基本符合平截面假定,环向受压的钢管对混凝土没有约束力。应用有限元法模拟试件的轴力-挠度曲线和变形模态,模拟结果与试验结果吻合良好。总体而言,钢管高性能混凝土压弯构件与普通钢管混凝土压弯构件在静力性能方面没有本质区别。更多还原

【Abstract】 The static performance of the high-performance concrete filled steel tubular beam-columns were investigated in order to provide foundation for drawing the relative code of Liaoning Province.On the basis of experimental study on 18 specimens(the cubic compressive strength of the in-filled self-consolidating concrete was 96 MPa),it was found that the axial load-deflection curves could be divided into elastic,elasto-plastic and softening stages.The deflection curve was close to sine curve,distribution of longitudinal strain of the steel tube obeyed the plane section assumption,also,the transversely compressed steel tube had no confinement force to the concrete.The axial load-deflection curves and the deformed models were simulated by using FEM and the calculated results checked well with those of tests.In general,there are no essential differences between high-performance concrete filled steel tubular beam-column and normal concrete filled steel tubular beam-column in aspect of static performance.更多还原