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本文通过对一组钢筋混凝土柱的多次循环荷载试验,研究了截面形式(含配箍形式)、剪跨比及配箍率对钢筋混凝土柱的滞回特性、最终破坏形式和变形能力等特性的影响。在分析各试件受荷全过程和破坏机理的基础上,总结出(初始)受弯破坏(即纵筋屈服)的柱存在着三种最终破坏形式,即最终剪切破坏、最终粘结破坏和最终弯曲破坏,使柱在横向位移增大或循环加荷时迅速失去强度。本文提出了塑性铰区域变形的测量和分析方法,得到了塑性铰区域弯曲变形成份和剪切变形成份的特性及其相互关系,以及塑性铰区域变形与柱全变形的关系。
In this paper, through repeated cyclic loading tests on a group of reinforced concrete columns, the characteristics of the cross-section (including the hoop form), the shear-span ratio and the ratio of stirrups to the hysteretic properties, final failure modes, and deformability of the reinforced concrete columns are studied. Impact. Based on the analysis of the loading process and the failure mechanism of each specimen, it concludes that there are three kinds of final failure modes for the (initial) bending failure (ie, the longitudinal tendon yielding) column, namely the final shear failure and the final bond failure. And the ultimate bending failure causes the column to rapidly lose strength when the lateral displacement is increased or when it is cyclically loaded. In this paper, the measurement and analysis methods of plastic hinge region deformation are proposed. The characteristics of the bending deformation component and the shear deformation component of the plastic hinge area and their relationship, as well as the relationship between the plastic hinge area deformation and the column full deformation are obtained.