塑性铰区埋入高阻尼隔震橡胶后RC柱抗震性能的-工程力学-清华大学.PDFVIP

第 26 卷第 10 期 Vol.26 No.10 工 程 力 学 2009 年 10 月 Oct. 2009 ENGINEERING MECHANICS 102 文章编号：1000-4750(2009)10-0102-09 塑性铰区埋入高阻尼隔震橡胶后 RC 柱抗震性能的试验研究 *张大长，陈怀亮，韩丽婷 (南京工业大学土木工程学院，南京 210009) 摘 要：以开发塑性铰区埋入隔振橡胶层的新型RC 柱为目的，通过橡胶层提高 RC 柱的变形能力、增强延性和 耗能能力，改善传统 RC 柱的抗震性能；探讨埋入不同厚度橡胶层 RC 柱的承载力-变形特性、破坏模式和抗震性 能。试验及分析结果表明：反复水平荷载作用下普通 RC 柱的塑性铰区出现较多的水平裂缝和竖向裂缝，且裂缝 宽度较大，塑性铰区混凝土的损伤和破坏均较严重，RC 柱的荷载-位移曲线呈反“S”的捏拢形；塑性铰区埋入 橡胶层的 RC 柱的初始刚度与 RC 柱基本相同，水平承载力有所降低，但是，橡胶层能够显著提高 RC 柱的变形 性能，裂缝稀疏且宽度明显变小，即塑性铰区混凝土的损伤降低，荷载-位移滞回曲线呈梭形，且没有明显的下降 段，比 RC 柱具有更好的耗能能力。在水平荷载作用下，塑性铰区埋入橡胶层 RC 柱的水平承载力上升速度与埋 入的橡胶层厚度有关，埋入的橡胶层越厚，水平承载力上升越慢。 关键词：塑性铰；高阻尼隔震橡胶；抗震性能；钢筋混凝土柱；试验研究 中图分类号：TU352.1; TU317+ .1 文献标识码：A EXPERIMENTAL STUDY ON THE SEISMIC BEHAVIOR OF RC COLUMN WITH RUBBER LAYER BUILT IN ITS PLASTIC HINGE * ZHANG Da-chang , CHEN Huai-liang , HAN Li-ting (Civil Engineering Institute, Nanjing University of Technology, 210009, China) Abstract: This paper aimed at developing a new type of column with a rubber layer built-in its plastic hinge zone, in which the deformation capacity, ductility and energy dissipation are increased and improved. The tests and the analyses of results showed that concrete in the plastic hinge zone of RC column was seriously damaged under horizontal cyclic loading and a large amount of horizontal cracks and vertical cracks with large width appeared and extended in the hinge zone of RC column, and the hysteria curves of load-deformation is reverse S shape. When the rubber layer was built in the hinge zone of RC columns, the ultimate strength of RC column slightly decreased, but