电力工程水平地震影响系数最大值取值分析

Analysis of determining maximum value of horizontal seismicinfluence coefficient in electric power engineering

电力工程在抗震设计时,通过水平地震影响系数最大值(αmax)计算地震影响系数,水平地震影响系数最大值一般在规范中直接给出,但是,电力工程抗震设计常用的规范中给出的αmax却不尽相同,不同的原因是由于新一代《中国地震动参数区划图》造成的.其中,《电力设施抗震设计规范》的αmax是根据新区划图相关规定给出的数值,其他规范的数值是以老版区划图为基础.在抗震设计时,在相关规范未按新区划图调整前,可以《电力设施抗震设计规范》给出的αmax为准,但该规范未提供其他超越概率条件下的αmax,本文将加以补充.

In seismic design of power engineering,it is required to use the maximum horizontal seismic influence coefficientαmaxto calculate seismic influence coefficient.The maximum horizontal seismic influence coefficient is given in the specification directly.However,commonly given in the power engineering seismic design specificationαmaxare not the same.The different cause is due to a new generation Chinese seismic zoning map.Among them,in the seismic design code for electric power facilities,theαmaxis given with the new seismic zoning map;in the other norms,theαmaxis given with old one.The author believes that before the related specification have not adjusted according to the new seismic zoning map,the designers can select theαmaxfrom the seismic design code for electric power facilities.For the some lack in this code,the author will supplement in this paper.