不同虚拟横梁对箱形梁桥自振频率的影响探究

Study on the Influence of Different Virtual Beams on the Natural Frequencies of Box Girder Bridges

为研究箱梁桥的横向受力,以某单箱双室宽翼缘连续梁(18 m+20 m+18 m)为依托工程,基于慧加梁格法基本理论,采用Midas civil建模仿真,模拟不同虚拟横梁的截面形式,分析桥梁的自振频率,并与实桥测试频率进行对比分析。结果表明:工字型截面横向连接方式计算结果与实桥结果较为接近,研究结果可为该类桥梁仿真模拟提供参考。

In order to study the transverse force of box girder bridge,it is supported by a single-box double-chamber wide flange continuous beam(18 m+20 m+18 m).Based on the basic theory of huijia grillage method,Midas civil was used for modeling and simulation,the section forms of different virtual beams are simulated,the natural vibration frequency of the bridge is analyzed and compared with the test frequency of the real bridge.The results show that the calculated results are close to the real bridge,the research results can provide reference for the simulation of this kind of bridge.