摘要
针对既有铁路钢桁梁桥原有设计方案刚度不足的问题,提出了三种可行的加固设计方案。采用有限元软件MIDAS建立了加固前后桥梁结构空间振动分析模型并进行了动力模态分析,通过对比分析加固前后桥梁结构的自振频率变化及列车移动活载作用下桥梁结构动力挠度,对比验证了三种加固方案的有效性,并给出了实际工程推荐方案。
Aiming at the problem that the original design scheme of the existing steel truss railway bridge is with insufficient rigidity, three feasible reinforcement design schemes are put forward. Using the finite element software MIDAS, the spatial vibration analysis model of bridge structure before and after the reinforcement is established and the dynamic model analysis is carried out. By comparing and analyzing the dynamic deflection of bridge structure under the effect of natural variation frequency change of bridge structure and live load of train moving before and after the reinforcement, the effectiveness of three kinds of reinforcement schemes are compared and verified, and the recommendation scheme for practical engineering is given.
出处
《北方交通》
2015年第11期17-20,共4页
Northern Communications
关键词
列车
钢桁梁
动力特性
加固设计
Train
Steel truss
Dynamic characteristic
Reinforcement design
