高烈度地震区某幼儿园减震分析与设计

Energy-Dissipation Analysis and Design of a Kindergarten Building in High Seismic Intensity Region

介绍了黏滞阻尼器的结构构造和工作原理,以位于8度抗震设防地区的某幼儿园为例,采用Midas Gen有限元分析软件,选取了5条天然地震波和2条人工地震波,分析了主体结构在多遇地震和罕遇地震作用下的抗震性能,给出了黏滞阻尼器在不同水准地震作用下的耗能情况。计算结果表明:附设黏滞阻尼器后,主体结构抗震性能良好,可以实现“三个水准”抗震设防目标。罕遇地震作用下,结构整体塑性程度较低,损伤屈服机制合理。黏滞阻尼器在地震作用下表现出良好的耗能特性,罕遇地震作用下提供的附加阻尼比低于多遇地震作用,同时多组地震波附加阻尼比的离散性有所降低。研究成果可为类似工程提供借鉴。

The construction details and working principle of viscous damper is introduced.Taking a kindergarten located in an 8-degree seismic fortification area as an example,five natural earthquake waves and two artificial earthquake waves are selected by using the Midas Gen finite element analysis software to analyze the dynamic response of the structure under frequent earthquake and rare earthquake,and the energy consumption of the viscous damper under the three-level earthquakes is given.The results indicate that with the addition of viscous damper,the main structure has good seismic performance and can achieve the"three-level"of seismic fortification goals.Under rare earthquakes,the overall plasticity of the structure is relatively low,and the damage yield mechanism is reasonable.Viscous damper exhibit good energy dissipation characteristics under earthquake action,providing a lower additional damping ratio under rare earthquakes than under frequent earthquakes,and the dispersion of additional damping ratios for multiple sets of seismic waves is also lower.This work can provide reference for similar projects.