医疗类建筑是抗震救灾的重要场地,如何保证医疗建筑在发生地震时实现“大震不倒”甚至“功能不中断”,成为值得研究的关键问题。对于位于发震断层附近的医疗类建筑,本文以实际项目为例,采用粘滞阻尼器作为一种消能减震的手段,将减震结构与非减震结构在多遇地震和罕遇地震工况下的地震响应进行对比。结果表明:多遇地震工况下,粘滞消能器发生轴向拉压变形开始耗能,能够提供3%的附加阻尼比,主体结构地震力减小,结构构件尺寸较非减震结构能够更好地满足医疗建筑的使用要求;罕遇地震工况下,设置粘滞消能器的结构X与Y向最大层间位移角分别为1/214和1/230,结构塑性铰分布满足“强柱弱梁”的设计准则,整体结构基本满足“大震下功能不中断”的性能要求。

As an important site for earthquake prevention and disaster reduction,how to ensure medical buildings in the event of an earthquake to achieve no collapse or even uninterrupted function has become a key issue worthy of study. For the study of near-fault medical buildings,in this paper we take the actual project as an example,using viscous dampers as a means of energy dissipation and vibration reduction,to compare the seismic response of the damping structure and the non-damping structure under frequent and rare earthquakes. The results show that the axial tension and compression deformation of viscous dampers begins to dissipate energy,which can provide 3% additional damping ratio under frequent earthquake to decrease the seismic force of the main structure. The size of structural components can better meet the requirements of medical buildings than that of non-damping structures. Under rare earthquakes,the maximum inter laminar displacement angles in X and Y directions of the structure with viscous dampers are set to be 1/214 and 1/230 respectively. The distribution of plastic hinges of the structure meets the design criterion of “strong column and weak beam”. The overall structure basically meets the performance requirement of uninterrupted function under large earthquakes.

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“十三五”科技部科技支撑计划子课题“装配式钢筋混凝土车站技术经济与相关政策研究”(2017YFB1201104)资助