高烈度区钢结构转运站隔震性能分析与研究  

Analysis and Research on Seismic Isolation Performance of Steel Structure Transfer Station in High Seismic Intensity Area

作　　者：江赛雄 傅强 JIANG Saixiong;FU Qiang(Southwest Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Chengdu 610021,China;New Generation Building Technology and Application Research Center,Chengdu 610021,China)

机构地区：[1]中国电力工程顾问集团西南电力设计院有限公司,四川成都610021 [2]新一代建筑技术及应用研究中心,四川成都610021

出　　处：《电力勘测设计》2024年第1期35-42,共8页Electric Power Survey & Design

摘　　要：为研究高烈度区火力发电厂中钢结构转运站隔震应用效果及隔震性能,本文建立两层和五层两个典型钢结构转运站进行隔震结构研究。并选取5条天然地震波与2条人工地震波对结构进行时程分析,对比分析隔震前后结构的动力特性、楼层层间位移角、楼层层间剪力等地震响应指标。得到以下结论:1)在高烈度区转运站结构设置基础隔震支座,能有效延长结构自振周期,降低结构地震响应强度。2)结构设置基础隔震支座后,在自然地震波与人工地震波的作用下,结构的柱底水平剪力、楼层层间位移角、楼层层间剪力相比隔震前都得到了有效降低,建议高烈度区转运站结构有条件时宜采用结构隔震措施。3)隔震结构隔震效果差异与结构隔震层屈重比的大小存在直接关系,合理的控制隔震层屈重比能有效提高结构的隔震效果。4)隔震设计时应考虑结构变形对工艺设备的影响,消除相邻建筑变形不一致产生的附加应力,以保证结构安全。In order to study the application effect and isolation performance of steel structure transfer stations in thermal power plants in high intensity areas,two typical steel structure transfer stations with two floors and five floors are established in this paper to study the isolation structure.The time history analysis of the structure is carried out by selecting 5 natural seismic waves and 2 artificial seismic waves,and the dynamic characteristics,inter story displacement angle,inter story shear force and other seismic response indexes of the structure before and after isolation are compared and analyzed.The conclusions are as follows:1)The foundation isolation bearing in the transfer station structure in the high intensity area can effectively prolong the natural vibration period of the structure and reduce the seismic response strength of the structure.2)After the structure is equipped with base isolation bearing,under the action of natural earthquake wave and artificial earthquake wave,the horizontal shear force at the bottom of the column,the displacement angle between floors,and the shear force between floors of the structure have been effectively reduced compared with those before isolation.It is suggested that the transfer station structure in high intensity areas should adopt structural isolation measures when conditions permit.3)The difference of isolation effect of isolated structures is directly related to the yield weight ratio of the isolation layer,and reasonable control of the yield weight ratio of the isolation layer can effectively improve the isolation effect of structures.4)During isolation design,the influence of structural deformation on process equipment shall be considered to eliminate additional stress caused by inconsistent deformation of adjacent buildings to ensure structural safety.

关 键 词：高烈度区 钢结构转运站 隔震结构 铅芯隔震支座 抗震性能 

分 类 号：TU352.1[建筑科学—结构工程]