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首页> 外文期刊>International journal of structural stability and dynamics >Seismic Analysis of Single-Layer Latticed Domes Composed of Welded Round Pipes Considering Low Cycle Fatigue
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Seismic Analysis of Single-Layer Latticed Domes Composed of Welded Round Pipes Considering Low Cycle Fatigue

机译：考虑低循环疲劳的焊接圆形管道组成的单层铺饰圆顶的地震分析

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摘要

Member failure due to low cycle fatigue may occur for steel structures under strong earthquakes. In this paper, the seismic response of single-layer latticed domes composed of welded round pipes is analyzed by the software Open System for Earthquake Engineering Simulation (OpenSees) incorporating low cyclic fatigue, in which the equations of initial camber for members are obtained from the buckling coefficient curve of compression members in Chinese codes. Single-layer latticed domes composed of welded round pipes with different parameters are modeled, and the seismic responses of the domes with and without material fatigue are compared by the incremental dynamic analysis. The results show that under strong earthquakes, the seismic responses including the maximum displacements and plastic development of the domes with fatigue are larger than those of the domes without fatigue. The collapsed PGAs decrease by 10-25% if low cycle fatigue is incorporated. Therefore, the low cycle fatigue of material should be taken into account in the seismic analyses of single-layer latticed domes under strong earthquakes.
机译：强烈地震下的钢结构可能出现由于低循环疲劳而导致的成员故障。本文通过焊接圆形管道组成的单层铺饰圆顶的地震响应由包含低循环疲劳的地震工程模拟（Opensees）的软件开放系统分析，其中构件的初始弯曲的方程是从中文代码中压缩成员的屈曲系数曲线。由具有不同参数的焊接圆形管道组成的单层铺饰圆顶，并通过增量动态分析比较了圆顶与材料疲劳的圆顶的地震反应。结果表明，在强大的地震下，包括最大位移和具有疲劳的圆顶的最大位移和塑料开发的地震反应大于圆顶的圆顶没有疲劳。如果掺入低循环疲劳，则塌陷的PGA将减少10-25％。因此，在强烈地震下的单层格子圆顶的地震分析中，应考虑材料的低循环疲劳。

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