带水平向黏滞阻尼器的弹簧支座隔振结构抗震性能研究

Study on seismic performance of structure with vibration-isolating spring bearings and horizontal viscous dampers

针对弹簧隔振结构具有竖向隔震性能佳、水平减震性能不足的特点,提出一种带水平向黏滞阻尼器的弹簧支座隔振结构,将弹簧支座与黏滞阻尼器组合,既能满足竖向隔振需求,又能在水平向达到减震效果。以上音歌剧院为工程背景,主要研究带水平向黏滞阻尼器的弹簧支座隔振结构的抗震性能。首先通过弹簧支座方案与无隔振方案的对比,得到弹簧支座隔振结构竖向隔振效果显著、水平隔震效果不佳的结论;提出"弹簧隔振支座+黏滞阻尼器"的组合隔振方案,通过详细的方案对比证明组合隔振结构在受力和变形控制上的优越性;对整体结构进行罕遇地震下抗震性能分析,结果表明隔振弹簧可正常工作,黏滞阻尼器发挥良好耗能作用,整体结构处于较优的性能状态。

For the reason that the spring performs well at vertical isolation but insufficiently at horizontal earthquake dissipation, a design method of combined vibration-isolating was proposed, which combined spring bearing with horizontal viscous damper to meet the vertical vibration isolation requirements and achieve the earthquake dissipation in the horizontal direction. Based on the opera house of Shanghai Conservatory of Music, the seismic performance of structure with vibration-isolating spring bearings and horizontal viscous dampers was studied. Firstly, the spring bearings scheme and the non-spring bearings scheme were compared, showing that the structure with vibration-isolating spring bearings was more effective in vertical vibration isolation and less effective in horizontal earthquake isolation. Then the combined vibration isolation scheme used vibration-isolating spring bearings combined with viscous dampers was proposed, and was proved to work well in controlling the structural force and deformation via comparing different schemes in detail. Lastly, the seismic performance of the structure under the rare earthquake was analyzed. The result shows that the vibration-isolating spring work normally, and the viscous dampers dissipate energy well and the whole structure performs better.