某钢结构景观桥晃动分析及加固
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    摘要:

    某钢结构景观桥投入运营后,人走至跨中位置时,能明显感到桥梁横向晃动,须进行加固改造。文章首先从桥梁结构布置、节点做法介绍了桥梁现状概况,然后采用Midas建立模型进行分析,模型位移计算结果不收敛,初步判定为结构体系不稳定。文章提出三种加固措施,将铰接支座改造成固定支座、将钢梁铰接连接节点改造成刚接节点、增加支撑,并分别建立模型进行分析,最后结合现场实际情况及理论与实际的出入,推荐采用将钢梁铰接节点改造成刚接节点并增加主梁交叉支撑的方案,按方案加固后横向晃动问题消失。通过该桥的分析及加固方案设计,对以后类似工程有一定借鉴意义。

    Abstract:

    After a certain steel structure landscape bridge was put into operation, when people walked to the mid-span position, they could obviously feel the bridge swaying laterally and needed to be reinforced. The article first introduces the current situation of the bridge from the layout of the bridge structure and the method of joints, and then uses Midas to build a model for analysis. The displacement calculation result of the model does not converge, and it is preliminarily judged that the structure system is unstable. The article proposes three reinforcement measures, transforming the hinged support into a fixed support, transforming the steel beam hinged connection node into a rigid connection node, adding support, and separately establishing models for analysis, and finally combining the actual situation on the site and the difference between theory and practice. , It is recommended to adopt the scheme of transforming the hinged joints of steel beams into rigid joints and increase the cross bracing of the main beams. The lateral shaking problem disappears after strengthening according to the scheme. Through the analysis of the bridge and the design of the reinforcement scheme, it has certain reference significance for similar projects in the future.

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  • 收稿日期:2021-12-17
  • 最后修改日期:2022-02-11
  • 录用日期:2022-02-11
  • 在线发布日期: 2022-07-21
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