【摘要】 为避免矩形截面框架柱在斜向水平地震作用下发生脆性破坏,通过试验研究14根框架柱在斜向水平荷载作用下的受力性能和破坏机理。以桁架-拱模型为基础建立计算矩形截面框架柱斜向受剪承载力的空间桁架-拱模型,该模型主要考虑了框架柱截面面积、混凝土和箍筋材料强度、配箍率、轴压力以及混凝土强度折减系数对其斜向受剪承载力的影响。最后,利用该文以及其他试验共计30根矩形截面框架柱的斜向受剪承载力试验结果对此空间桁架-拱模型的可行性和适用性进行了验证,试验结果与计算值的对比表明利用该模型可以安全计算矩形截面框架柱斜向受剪承载力。更多还原

【Abstract】 In order to avoid brittle failure of rectangular frame column under oblique horizontal earthquake,a total of 14 specimens are experimented to investigate the damage form and failure mechanism of rectangular frame column subjected to oblique horizontal load.A spatial truss-arch model developed from unilateral truss-arch model is proposed.Main parameters influenced oblique shear strength of rectangular frame column in the new model are cross-sectional area of frame column,material strength of concrete and stirrup,transverse reinforcement ratio,axial load and the reduction coefficient of concrete strength.Finally,the oblique shear strength of 30 rectangular frame columns under oblique horizontal load are calculated to verify the feasibility and applicability of the spatial truss-arch model,among which 16 specimens are made by other experiments.Comparisons between the experimental results and calculations show that the oblique shear strength of rectangular frame columns calculated by the spatial truss-arch model are safe.更多还原