钢筋混凝土柱低周疲劳力学性能分析  

Low-cycle fatigue damage for shear behavior of reinforced concrete columns

作　　者：刘鸣[1] 刘伯权[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061

出　　处：《长安大学学报（自然科学版）》2012年第5期65-70,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(51078037);教育部高校博士点基金项目(20100205110010);陕西省自然科学基金项目(2010JM7002)

摘　　要：在以往12根1/2比例钢筋混凝土柱低周疲劳试验研究基础上,分析了不同位移幅值下弯曲型破坏混凝土柱的累积损伤发展规律,重点研究了钢筋混凝土柱的强度退化、刚度退化、能量耗散等力学性能。研究结果表明:钢筋混凝土柱的低周疲劳破坏过程一般可分为损伤迅速发展、相持及破坏3个阶段;强度退化和刚度退化与构件的损伤过程发展一致,导致其产生的根本原因是构件弹塑性性质及损伤的发展;构件破坏时滞回耗能随加载路径不同而存在显著差异,裂缝的开展和分布状态对构件耗能能力有明显的影响。Based on existing low-cycle fatigue tests on 12 identical half-scale reinforced concrete columns,the development of cumulative damage of reinforced concrete frame column was investigated.Furthermore,the rigidity deterioration,strength deterioration and energy dissipation of reinforced concrete columns were studied.The results indicate that the failure process of reinforced concrete columns can be divided into three stages：damage rapid development stage,stalemate stage,and failure stage.The stiffness degradation traces and rigidity deterioration traces are accompanied with the failure process.The reason lies in the essential feature of elastic-plastic behavior of member and the development of damage.In addition,the energy dissipation is related to the loading path and is influenced by the crack development and crack distribution of column.

关 键 词：结构工程 柱 低周疲劳 累积损伤 疲劳寿命 

分 类 号：TU375.4[建筑科学—结构工程]