纵向钢筋对钢筋混凝土梁振动特性的影响  

Effect of Reinforcement on the Dynamic Characteristics of Reinforced Concrete Beam

作　　者：楼梦麟[1] 辛宇翔[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《振动工程学报》2002年第2期220-223,共4页Journal of Vibration Engineering

摘　　要：讨论纵向钢筋对钢筋混凝土梁自振频率和振型的影响。提出了考虑纵向钢筋作用后梁自由振动分析的模态摄动法 ,通过实际算例 ,说明不同含钢率梁的自振特性的变化情况。算例表明模态摄动方法简单实用 ,具有良好的近似性 ;纵向钢筋对梁的模态特性 (尤其是第一阶模态特性 )的影响不可忽视。The effect of reinforcement on the vibration modal functions and natural frequencies of reinforced concrete beam is discussed in this paper. Considering the effect of reinforcement, the method, which may be called the method of modal perturbation, is put forward. The variation of dynamic characteristics of reinforced concrete beam under varying steel content is shown in the numerical example, and it can be inferred from the numerical example that this method is simple, practical and has good precision. It is concluded that the effect of reinforcement should not neglected in the dynamic analysis of reinforced concrete beam.

关 键 词：纵向钢筋 振动特性 影响 动力特性 钢筋混凝土梁 模态摄动法 

分 类 号：TU375.1[建筑科学—结构工程]