混合减震技术在医疗建筑中的应用研究

Analysis research and application of composite damping technique in hospital building

混合消能减震是基于速度型阻尼器和位移型阻尼器各自的力学性能特点,结合结构受力和变形情况,在结构中混合布置不同类别的耗能减震装置,实现降低结构地震作用的一种新型减震技术。在不同水准地震作用下分阶段发挥各耗能器的作用,达到减震效率的最优化。以某医院建筑为工程背景,在结构中同时布置了黏滞阻尼器和屈曲约束支撑。通过研究整体结构和各减震装置在不同水准地震作用下的受力和变形,得出黏滞阻尼器在各水准地震作用下均发挥耗能作用,且耗能性能随地震作用的增大而降低,屈曲约束支撑主要在设防地震和罕遇地震作用下发挥耗能作用,且耗能性能则在愈高水准的地震愈发显著。提出的减震技术保证了结构在不同的地震水准下,具有相当的耗能能力,该设计思路可以为类似项目提供借鉴和参考。

The composite damping technique is a new design concept based on the mechanical properties of velocity-related dampers and displacement-related dampers,by combining with the force and deformation of the structure,different types of energy dissipation devices are arranged in different locations of the structure to reduce the seismic action of the structure.The dampers play different roles under different level of earthquakes,thus the energy dissipation efficiency can be optimized.A hospital building was taken as an example,viscous dampers and metallic dampers are arranged in the structure simultaneously,by studying the mechanical and deformation characteristics of the whole structure and the damping devices,results show that the viscous dampers play roles in all levels of seismic action,the energy dissipation performance decreases with the increase of the seismic action,while the buckling restrained braces mainly play a role in middle and rare earthquakes,and the energy dissipation performance is more significant in the high level earthquake.The technique proposed ensures that the structure has adequate energy dissipation capacity under different seismic levels.The design concept referred can be taken as a useful reference for the similar projects.