Analysis and design of conversion structure of an underground substation combined with superstructure
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摘要: 虹杨变电站是与上部建筑结合的深埋地下变电站,能够很好地解决城市用电问题和土地使用紧张问题之间的矛盾,但其在电力系统的应用及研究较少,面临新的挑战,包括上下建筑的协调与转换、转换结构的抗震与防连续倒塌等安全性问题。对比了各种转换结构类型,选择了厚板转换形式,并采用有限元软件对其受力和变形进行了精细分析。在抗震方面,采用振型分解反应谱法,建立了虹杨变电站地上、地下结构的整体三维有限元模型,考虑土的弹性约束程影响,考虑水平和竖向地震力,进行了抗震性能设计,得到了地震作用下上下结构的共同作用及转换厚板的应力变形规律,指导了本工程转换厚板的抗震设计。Abstract: Hongyang Substation is combined with the upper part of the building of deep buried underground substation, and it can well solve the contradictions between urban electricity and land use tension. However, in power system application, there are fewer researches, and new challenges occur, including coordination and conversion of upper and lower structures, seismic resistance of conversion structure and anti-progressive collapse and other security issues. Various kinds of structure types are compared, and the form of thick plate is selected. The stress and deformation are analyzed by using the finite element software. The whole three-dimensional finite element model of the ground and underground structure of the substation is established by using the mode decomposition response spectrum method. Considering the influences of elastic constraint, horizontal and vertical seismic forces, the seismic performance is designed, and the joint action of the upper and lower structures and the stress and deformation rules of the plate are obtained.
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Keywords:
- underground substation /
- superstructure /
- conversion /
- resistance /
- anti-progressive collapse
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