摘要
有限元模型对桥梁质量和刚度分布模拟是否准确,直接影响桥梁的动力分析结果.本文对斜拉桥的索、桥塔、主梁等结构的已有建模方法进行了探讨和评述.针对斜拉桥特点,采用三维梁单元、板壳单元、杆单元等建立大桥的有限元空间分析模型,进行结构动力特性分析.将计算结果与实桥脉动测试结果进行比较,结果显示与实测结果相当吻合,进一步验证了模型的有效性,同时也为大桥进一步进行健康监测的研究提供了依据.
Building a finite element model of bridge, which accurately reflects the true structure＇s stiffness and mass distribution, can improve the precise of dynamic analysis results of structure very much. In this paper, the existing analogues of cable, tower, girder of the bridge are mentioned and observed. A large structure finite element method analysis program is adopted to build a 3-D model of a cable-stayed bridge, in which beam element, shell element and link element are used to get the dynamic property of bridge. Comparing the results of calculation with that of ambient vibration test, the validity of the model is approved and a base to have a further study on this bridge is obtained.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第1期56-59,共4页
Journal of Xiamen University：Natural Science
关键词
斜拉桥
有限元
动力特性
脉动测试
cable-stayed bridge
finite element method
dynamic property
ambient vibration test
