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以某火力发电厂主厂房为原型,建立整体结构的空间计算模型,对其分别进行模态分析和水平双向地震作用下的弹塑性时程分析。结合拟动力和伪静力试验研究,探讨框排架结构的空间变形性能及塑性铰的分布特点。针对此类结构特点引起的严重地震扭转效应,提出减小扭转的措施,改善了火力发电厂主厂房在高烈度地震作用下的动力性能,为工程设计提供参考依据。
Taking the main workshop of a thermal power plant as a prototype, a space calculation model of the whole structure is established, and the elasto-plastic time history analysis under modal analysis and horizontal bidirectional earthquake is carried out respectively. Combined with quasi-dynamic and pseudo-static experimental research, the space deformation performance and the distribution characteristics of plastic hinge are discussed. Aiming at the serious earthquake torsion effect caused by such structural features, measures to reduce torsion are proposed to improve the dynamic performance of the main plant of a thermal power plant under the action of high-intensity earthquakes and provide a reference for engineering design.