黏滞阻尼器加固的RC框架结构抗震性能分析

Research on seismic performance of RC frame structure retrofitted with viscous dampers

经济建设的发展对建筑结构的抗震安全度提出了更高的要求,在各种抗震加固方案中,基于黏滞阻尼器的加固方案被广泛应用。采用合理的弹塑性分析模型对采用黏滞阻尼器加固的RC框架结构在不同强度地震作用下的性能表现进行了全面考察,并重点关注了不同参数减震方案的减震效果以及结构在大震和特大震下的性能表现。研究表明随着地震动强度的变化,黏滞阻尼器的减震效果会有所不同,且随着地震强度增加,采用更大速度指数黏滞阻尼器的减震方案的减震效果更佳。

Higher demands on seismic safety of building structures are required with the development of society. Seismic retrofitting scheme based on viscous dampers has been widely adopted. In this paper,a reasonable elasto-plastic analysis model was used to comprehensively examine the performance of RC frame structures retrofitted with viscous dampers under different earthquake intensity levels. And the paper focuses on the damping effects of various schemes with different parameters as well as the structural performance under strong and mega earthquakes. It is shown that the damping effect of the viscous damper changes with earthquake intensity levels. And the scheme using viscous damper with larger velocity index has a better effect with the increase of seismic intensity.