基底隔震高压隔离开关抗震性能分析

在以往的大地震中，高压隔离开关均遭受了严重的损坏，此类设备的损坏主要由于瓷柱脆性破坏造成。以往该类设备抗震性能的研究主要集中于瓷柱以及支架的研究。实际情况表明，高压隔离开关自身特点决定了仅依靠增强瓷套管及其支架的刚度，不能够从根本上解决其抗震问题。高压隔离开关设置基底隔震层，通过隔震系统的滑移吸收地震能量，基础只将有限的地震能量传给上部结构，减震效果显著。地震时程分析证明，基底隔震高压隔离开关具有较大的安全储备。

Analysis of Quake Resistance Performance of HV Disconnecting Switch with Base Isolation

HV disconnecting switches were severely damaged in historical big earth quakes,which are mainly caused by porcelain pole brittle failures.Previous quake resistance studies were focused on porcelain pole and its support.Actual situation shows that,because of the characteristics of HV disconnecting switch itself,it is impossible to solve quake resistance problem fundamentally by only increasing stiffness of porcelain pole sleeve and its support.By applying base isolation layer on HV disconnecting switches,the energy of the quake is absorbed by the slippage of isolation system,resulting limited quake energy being transferred from base to upper structure,which significantly increases quake reduction.Quake time history analysis shows that HV disconnecting switches with base isolation have larger safety reserve.