不规则结构的基础隔震研究

Analysis on Base Isolation of Irregular Structures

利用有限元软件SAP2000对不规则结构基础隔震进行分析。采用平立面不规则结构和立面不规则情况下的基础规则两种不规则结构模型,通过对基础隔震结构隔震层的支座选择和布置改变隔震层的偏心率,分析不同的隔震层刚度、隔震层偏心距和上部结构的楼层的偏心距对平立面不规则结构的扭转效应影响。分析结果表明:对于不规则结构隔震层和上部结构的偏心率都会引起结构产生扭转效应,在两种模型的对比中我们也得出基础规则的结构也会产生一定的扭转效应,因此在实际的应用中也应考虑其扭转破坏给工程带来的不利影响。

The paper analyzes the base isolation of irregular structures with finite element software SAP2000. By adopting the two irregular structure models： flat facade irregular structures and facade irregular structures, and changing the eccentricity of isolation layer through choosing and arranging the bearings of the isolation layer of base isolation structures, the paper also analyzes the impact of different isolation layer stiffness, eccentricity of isolation layer and the floors of upper structures on the torsion effect of flat facade irregular structures. The results show that： both the isolation layer of irregular structures and eccentricity of the upper structures will lead to the structures to produce torsion effect. By comparing the two models, it can be concluded that the structures of basis rules will also produce torsion effect; therefore the damage to the project caused by torsion effect should be considered in practice.