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大型空冷岛平台结构通常采用大直径管柱排架式结构体系,其抗震防线较为单薄,结构质量大且沿高度分布不均匀,难以进一步提高侧移刚度及抗震性能,具有特殊性.建议采用大型防屈曲支撑将空冷平台结构设计为消能减震结构体系.用Sap2000软件进行建模分析,比较分析了加入防屈曲支撑前后空冷岛模型的模态、周期、内力等数据,并进行非线性推覆分析及时程分析,结果表明,该结构体系可明显改善空冷岛平台结构在中震和大震下的抗震性能.提出了加入防屈曲支撑后管柱结构设计的改进方案,兼顾性能和经济,使应用可行性大为增加.
Large-scale air-cooled island platform structure usually adopts large-diameter column-and-column type structural system, which is characterized by its weak anti-seismic line of defense, high structural quality and uneven distribution along the height, and difficulty in further improving lateral stiffness and seismic performance. Buckling support design of air-cooled platform as energy-dissipating and shock-absorbing structural system.Modeling analysis with Sap2000 software, the data of modal, period and internal force before and after adding anti-buckling brace are analyzed and compared, and nonlinear push Covering analysis and time-history analysis, the results show that this structural system can significantly improve the seismic performance of air-cooled island platform under moderate and strong earthquakes. An improved scheme of pipe column design with anti-buckling support is proposed, which considers both performance and economy, Make the application more viable.