预应力简支梁固有频率研究  

Study on the natural frequencies of prestressed simple supported beam

作　　者：李萍[1] 浣石[1] 谭湘倩[1] 陶为俊[1] LI Ping;HUAN Shi;TAN Xiang-qian;TAO Wei-jun(Research Center of Civil Engineering Protection,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学土木工程防护研究中心,广东广州510006

出　　处：《广州大学学报（自然科学版）》2018年第2期55-60,共6页Journal of Guangzhou University:Natural Science Edition

基　　金：广州市属高校科研资助项目(1201620277)

摘　　要：基于经典轴压模型,研究了预应力筋偏心距、预应力大小对简支梁固有频率的影响,对已有的简支梁固有频率理论计算公式进一步修正.以预应力混凝土简支梁为例,通过ANSYS有限元分析了预应力筋偏心距以及预应力改变对预应力简支梁固有频率的影响,验证了混凝土模拟单元与预应力筋模拟单元的2种联系方式对计算结果没有影响,以期望为以后的预应力混凝土梁设计及健康检测提供参考.Based on the classical pressure model of the eccentric shaft,away from the influence of prestressed tendons,the size of frequencies,the formula is further modified on calculated frequencies of the present theory.Taking the prestressed concrete beam as an example,through the ANSYS finite element analysis of prestressed reinforcement and prestressed eccentric distance change influence on the natural frequency of the prestressed beam,the two contact elements and prestressed concrete simulated simulation unit bear no influence to the calculation results. The design of prestressed concrete beams can offer future expectations on health testing foundation.

关 键 词：预应力 简支梁 固有频率 偏心距 单元联系方式 

分 类 号：TU378[建筑科学—结构工程]