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首页> 外文期刊>International journal of steel structures >Comparion of Seismic Response of Single-layer Reticulated Dome under Unform and Incoherence Three-directional Excitations
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Comparion of Seismic Response of Single-layer Reticulated Dome under Unform and Incoherence Three-directional Excitations

机译：均匀和非相干三向激励作用下单层网状穹顶地震响应的比较

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摘要

Seismic ground motions at structural supports are spatially varying and incoherent. The spatial incoherency effects should be considered for structures with large span and multiple supports. Two single-layer reticulated domes of 120m span, with and without substructures under incoherent multiple supports and uniform excitations were modeled and analysed in this study. Time-history responses of structures are obtained and compared for simulated ground motion records. For the simulation, use of existing phase difference spectrum models and coherence models were considered, and three-directional excitations (two horizontal directions and vertical direction) are considered. The analysis results show that the spatial coherency effect can influence the seismic responses of reticulated domes. The results also indicate that the seismic spatial coherency of all three directions can be important, especially for structures without flexible substructures.
机译：结构支撑处的地震地震动在空间上变化且不连贯。对于具有大跨度和多个支撑的结构，应考虑空间不相干效应。在此研究中，对两个120m跨度的单层网状穹顶进行了建模和分析，该穹顶具有无相干的多支撑和均匀激励下的子结构和不具有子结构。获得了结构的时程响应，并比较了模拟的地面运动记录。为了进行仿真，考虑了使用现有的相差谱模型和相干模型，并考虑了三个方向的激励（两个水平方向和垂直方向）。分析结果表明，空间相干效应会影响网状圆顶的地震响应。结果还表明，所有三个方向的地震空间相干性都很重要，特别是对于没有柔性子结构的结构。

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