某站房结构抗震性能分析及采用粘滞阻尼器的减震分析

对某站房结构进行了罕遇地震下的抗震性能分析。屋面和拱支撑的位移较大,屈服杆件集中在屋面,并且夹层结构层间位移超限,不满足抗震设防目标的要求。随后采用粘滞阻尼器进行了减震分析。对替换屋面杆件为阻尼器、在拱上支撑之间设置阻尼器以及两者相组合的方式进行了比较。组合方式的减震效果最优。对25m夹层采用在端部柱间设置阻尼支撑的方式,层间位移减小显著,满足了抗震设防目标的要求。

Seismic behavior and vibration reduction analysis with viscous dampers of a station hall

The seismic behavior of a station hall under rare earthquake is analyzed.The results indicate that the roof and arch have large displacement,yield members are focused on the roof,and inter-story displacement of sandwich structure exceeds the limit,so the seismic fortification criterion can not be satisfied.Then vibration reduction analysis with viscous dampers is carried out.Replacing roof members by dampers,setting dampers between bracings on the arch and both the combination are used respectively,the comparison shows that vibration reduction effect of the combined manner is optimal to the roof and arch.Damping bracings are also fixed between the end columns in 25m sandwich,which decreases the inter-story displacement obviously,and the seismic fortification criterion can be satisfied.