基于提高结构隔震率的隔震支座组合布置

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中图分类号：TU352.1；TB115.1 文献标志码：B

Combination arrangement of seismic isolation support based on improving seismic isolation ratio of structure

ZHANG Qifu1，WANG Dunqiang1 ，LI Jingyu （1.School of Civil Engineering，Shandong Jianzhu University， Jinan 25O1O1，China； 2.Shandong Rail Transit Survey and Design Institute，Jinan 25O1O1，China）

Abstract：To solve the issue that the isolation structure with a single isolation support has a horizontal displacement exceeding the maximum deformation limit under earthquake action，3 types of isolation structures with different combination arrangements of 3 types of isolation supports are designed aiming at improving the isolation ratio.The dynamic time history of the isolation structure is analyzed using SAP2O0O finite element software. The results show that the natural vibration period of the structure can be extended significantly using the combination arrangement of seismic isolation supports. Under seismic fortification，the horizontal seismic impact coefficient is 0.128<0.4 ，and the seismic effect is reduced by 1 degree.Under rarely occurred earthquake，both interlayer displacement and support displacement are below the standard limits. The highest isolation ratio appears at the isolation structure with lead core laminated rubber support arranged in the outer ring and corners，and the natural laminated rubber support arranged inside.

Key words： seismic isolation support； seismic isolation design； seismic isolation ratio； arrangementstyle；time history analysis

0引言

随着建筑抗震要求的不断提高，以增大构件截面尺寸为主的传统抗震设计理论难以满足现实要求，利用隔震支座组成隔震层来隔离地震能量的隔震结构日益增多。（剩余5344字）