体外预应力梁动力特性的分析方法  

Analytical Approach for Dynamic Characteristics of Prestressed Beam with External Tendons

作　　者：楼梦麟[1] 洪婷婷[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：《同济大学学报（自然科学版）》2006年第10期1284-1288,共5页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金资助项目(50279031)

摘　　要：以体外预应力简支梁为例,讨论了预应力梁的振动过程中预加力的变化情况,建立了梁的受力模型,导出了预应力梁横向弯曲振动的微分方程.采用模态摄动法,得出求解预应力梁的动力特性的近似求解方法.通过算例结果和实验数据的比较,验证了算法的准确性.Based on the study of a simply-supported prestressed beam, the changes of the preloading in the vibration process of the beam are discussed and the analysis model of the beam is established. As a result, the differential equation of the lateral vibration for the simply-supported prestressed beam is obtained. The mode perturbation method is applied to deduce the approximation analysis technique for dynamic characteristics of the prestressed beam. The accuracy of the method is verified by the compariron of the results of a numerical example with the experimental data.

关 键 词：预应力梁 动力分析 模态摄动法 

分 类 号：TU375[建筑科学—结构工程] O32[理学—一般力学与力学基础]