全户内变电站装配式钢框架部分隔震结构体系振动台试验OA

To address the issue of excessive floor-mounted equipment acceleration in existing non-isolated indoor substations,a partial isolation retrofit strategy was proposed by introducing isolation bearings between the equipment and the floor slab.Based on this concept,a shaking table test was conducted on a prefabricated steel frame structure representative of an indoor substation.Three isolation schemes were considered:a fixed-base system(FBS),a base isolation system(BIS),and a partial isolation system(PIS).BIS was further categorized into BIS-LNR and BIS-LR,corresponding to the use of linear natural rubber(LNR)bearings and lead rubber(LR)bearings,respectively.Experimental results show that the maximum equipment acceleration in FBS reaches 1.42g,significantly exceeding the allowable limit of 0.6g.In contrast,BIS-LNR,BIS-LR,and PIS reduce the average equipment acceleration by 87%,69%,and 77%,respectively.In terms of structural response,the maximum inter-story drift of BIS is only 38%of that of FBS,while PIS shows a drift similar to FBS.Both remain well below the code-specified limit of 1/50.These results demonstrate that the proposed PIS retrofit strategy can effectively achieve the dual control of structural and equipment responses in existing indoor substations.