变压器–套管体系基础隔震振动台试验  

Shake Table Testing of a Base-isolated Transformer Bushing System

作　　者：马国梁[1] 朱瑞元[2] 谢强[1] 何畅[1] 辛朝辉[3] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]电力规划设计总院,北京100120 [3]特变电工沈阳变压器集团有限公司,辽宁110144

出　　处：《高电压技术》2017年第4期1317-1325,共9页High Voltage Engineering

基　　金：国家电网公司科技项目(20141625)~~

摘　　要：为解决在近期地震中大型变压器遭受严重破坏的问题,利用复合隔震支座系统对一个变压器–套管体系进行了基础隔震振动台试验研究。首先用叠层橡胶支座和滑移橡胶支座组成的复合隔震支座系统对一个变压器–套管体系进行了基础隔震设计布置,然后开展了该变压器–套管体系在白噪声和汶川地震的卧龙波、清平波和曾家波激励下的振动台试验研究,得到了该体系的动力特性和关键部位的地震响应,并对比分析了该变压器–套管体系采用基础隔震与未隔震的地震响应。试验结果表明:与未隔震体系相比,基础隔震变压器–套管体系的加速度和应变响应减小到其未隔震体系时的1/2以下,同时在一定程度上放大了隔震体系的位移响应,但该体系在幅值为0.4g的地震波作用下的套管顶部相对台面的位移<60 mm。复合隔震支座系统减小了地震动向变压器–套管体系传递,过滤掉了地震波中的高频成分,避免了与变压器–套管体系发生类共振,减小了地震响应。该试验研究验证了采用复合支座系统基础隔震变压器–套管体系的有效性,对于采用复合支座系统基础隔震的变压器可以考虑降低1度抗震设计要求。In order to solve serious damages of large-scale transformers in recent earthquakes, shaking table test on a base-isolated transformer-bushing system was conducted using a hybrid isolation system. Base isolation design and arrangement for the transformer-bushing system were implemented by the hybrid isolation system consisted of laminated rubber bearings and sliding bearings. Moreover, shaking table test on the base-isolated transformer-bushing system to white noise and Wolong, Qingping, Zengjia ground motions recorded in the great Wenchuan earthquake was conducted. Dynamic properties and earthquake responses of the system were measured. Meanwhile, the seismic responses of the base-isolated transformer-bushing were compared and analyzed with the non-isolated system. The results show that acceleration and strain responses of the base-isolated transformer-bushing system can significantly be reduced to less than 1/2 of those of the non-isolated system. Relative displacement responses of the base-isolated system to the table will increase to some extent, however, acceleration of 0.4g table motion is within 60 mm when the system to the peak. The hybrid base-isolation system can reduce ground motions transferring to the transformer-bushing system, filter out high frequency components of the earthquake motions, prevent quasi-resonance between transformer-bushing system and earthquake motions, and mitigate earthquake responses of the transformer-bushing system. The tests validate the effec- tiveness of the hybrid base-isolation system for a transformer-bushing system, therefore, the hybrid system base-isolated transformer can meet the design demands of lowering one-degreee earthquake fortification intensity.

关 键 词：变压器 叠层橡胶隔震支座 滑移隔震支座 复合隔震 振动台试验 地震响应 

分 类 号：TU352.12[建筑科学—结构工程]