大跨径钢管混凝土系杆拱桥动力特性分析

该文介绍了利用MIDAS/Civil建立袍江大桥空间模型。其主拱、边拱、吊杆横梁和桥面系采用梁单元、板单元模拟,吊杆和系杆用只受拉单元模拟,并对其进行模态分析提取桥跨自振特性。与实测值进行比较,查看基本振动形态,得出该桥实测模态与理论计算模态较吻合,且面内振动频率符合简化计算公式规律,该桥动力特性优良。

Analysis on Dynamical Characteristic of Long-span Concrete Filled Steel Tube Bowstring Arch Bridge

The article introduces Paojiang River Bridge Spatial Model set up by MIDAS/Civil.The simulation of beam unit and plate unit is for its main arch,side arch,boom crossbeam and deck system,and the simulation of tight side is only for the boom and bowstring.And the modal analysis is carried out to achieve the natural vibration characteristic of bridge span.Compared with the measured values,the basic vibration form is analyzed to educe that the measured mode of this bridge is more matched with the theoretical calculation mode,and the deck vibration frequency satisfies the rule of simplified calculation formula.The dynamical characteristic of this bridge is excellent.