模块化变电站预制舱竖向静力性能试验与数值模拟研究

为了探究模块化变电站预制舱结构在设计荷载作用下的安全性，以及不同设计参数的影响规律，开展了预制舱结构竖向静力性能研究。对实际工程安徽蚌埠临港220 kV变电站预制舱进行了竖向静力加载试验，利用ABAQUS有限元软件对预制舱进行了竖向推覆数值模拟，分析了预制舱的破坏模式，开展了预制舱竖向受力性能参数分析。结果表明：在设计荷载作用下，预制舱承载力和变形满足标准GB 50017—2017要求。在竖向推覆作用下，门洞处梁柱连接、舱底主次檩条连接先后受损，瓦楞板基本不会受损。设置立柱使预制舱下长梁最大位移减小了32.7%，门洞处建议布置立柱；单侧布置荷载使预制舱最大位移减小了39.9%，设备尽量布置在无门洞一侧；与增大瓦楞板厚度相比，底部铺设封板可有效减小预制舱竖向位移；对于大跨度预制舱，建议采用底梁三等分点吊装；预制舱优先端部开窗洞，加载侧开洞时应限制开洞数量及洞口间距。研究明确了预制舱结构的竖向承载性能，提出了设计建议，可为预制舱在实际工程中的应用提供一定的参考。

Experimental and numerical simulation study on vertical static performance of prefabricated cabins in modular substation

In order to investigate the safety of prefabricated cabin structure of modular substation under design loads and the influence law of different design parameters, a study was carried out on the vertical static performance of prefabricated cabin structure. The vertical static loading test was conducted on the prefabricated cabin of the 220 kV Lingang substation in Bengbu, Anhui Province. The vertical pushover numerical simulation of the prefabricated cabin was performed using ABAQUS finite element software. The damage mode of the prefabricated cabin was analyzed, and the parametric analysis of the vertical bearing performance of the prefabricated cabin was carried out. The test results show that the bearing capacity and deformation of the prefabricated cabin under the design load meet the code GB 50017—2017 requirements. Under the action of vertical pushover, the beam-column connection at door opening and the main-secondary purlin connection at cabin bottom are damaged successively, and the corrugated board is basically not damaged. Setting up columns reduces the displacement of the bottom beam of the prefabricated cabin by 32.7%, and columns are recommended for door openings. The lower beam maximum displacement of the prefabricated cabin is reduced by 39.9% by a unilateral arrangement of the loads, and the equipment should be placed as far as possible on the side without a door opening. Compared with increasing the thickness of corrugated boards, laying sealing boards at the bottom can effectively reduce the vertical displacement of the prefabricated cabin. For large-span prefabricated cabins, it is recommended to use three equal points of lifting for bottom beams. The prefabricated cabin prioritizes end window openings, and the number of openings and spacing of openings should be limited for the prefabricated cabin with load side openings. The study clarifies the vertical load bearing performance of prefabricated cabin structures and proposes design suggestions, which can provide certain reference for the application of prefabricated cabin in actual projects.