体外预应力连续梁振动特征的分析与研究  

Analysis on vibration behavior of externally prestressed concrete continuous beam

作　　者：熊学玉[1,2] 高峰[1] 李阳[1] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学先进土木工程材料教育部重点实验室,上海200092

出　　处：《振动与冲击》2011年第6期104-108,133,共6页Journal of Vibration and Shock

基　　金：工程建设行业标准<预应力混凝土结构设计规范>研究项目;上海市科委科技支撑计划(09231201102);上海市科委<现代预应力成套技术>(0907H194200);教育部高等学校博士学科点专项科研基金(20090072110051);铁道部重点课题(2010G009-K);科技部创新项目(10C26213100691)

摘　　要：Ayaho Miyamoto推导双折线体外预应力简支梁固有频率、熊学玉等对其给出的公式进行修正和扩充,但其公式仅适用于简支梁。以两跨单(双)折线体外预应力梁为例,采用整体分析和拉普拉斯变换方法,研究体外预应力连续梁的横向振动,推导出了频率方程和振型函数的解析表达式,推导过程适用于各种跨度的连续梁固有频率的计算。实测结果与公式计算误差为-2.8%,吻合较好,有利于指导实际工程。The formula of natural frequency of double broken line externally prestressed concrete beam has been derived by Ayaho Miyamoto and improved and extended by Xiong Xue-yu,et al,but the formula can only be applied to simply supported beam.Taking a two-spans single（double） broken line externally prestressed concrete beam as example,the transverse vibration of externally prestressed concrete beam was investigated by using the method of overall analysis and Laplace transform.The frequency equation and analytical expression of mode shape functions were deduced.The error between measured and calculated results is-2.8%.

关 键 词：连续梁 横向振动 固有频率 体外预应力梁 

分 类 号：TU375.1[建筑科学—结构工程]