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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。
In order to avoid the brittle failure of the rectangular cross-section frame column under oblique horizontal earthquake, the mechanical behavior and failure mechanism of 14 columns under oblique horizontal load were studied. Based on the truss-arch model, a space truss-arch model for calculating the diagonal shear strength of rectangular column frame columns is established. The model mainly considers the cross-sectional area of the frame columns, the strength of concrete and stirrups, the stirrup ratio, the axial pressure, Influence of concrete strength reduction coefficient on its oblique shear capacity. Finally, the feasibility and applicability of the space truss-arch model are verified by using the test results of the oblique shear capacity of a total of 30 rectangular cross-section frame columns in this article and other tests. The comparison between the experimental results and the calculated values shows that the use of the The model can safely calculate the oblique shear bearing capacity of rectangular cross-section frame columns.