摘要
阻尼比是一个重要的结构动力特性参数,它对结构的动力响应有着重要影响。目前结构抗震计算通常取阻尼比为常数,这不能真实反映建筑物的阻尼机理,与阻尼比的实测结果也有很大的差距。本文以选取的混凝土剪力墙模型振动台试验实测阻尼数据、拟静力试验前后实测阻尼数据为依据,讨论了混凝土剪力墙阻尼比的取值,统计得到了混凝土剪力墙阻尼比与变形相关的计算公式。通过与已有相关公式的比较,论证了本文建立的阻尼比计算公式的合理性和有效性。
Damping ratio is the most important dynamic parameter and has significant influence on the dynamic responses. However,Damping ratio is regarded as a constant when designing buildings at present. It is not consistent with damping mechanism and experimental data of damping ratio of buildings. Based on the damping data evaluated from several shake table tests and quasi-static cyclic tests,some damping properties of reinforced concrete shear wall are discussed,the predictors of damping ratios with amplitude dependencies are obtained by the regression analysis method. At last,the validity and feasibility of the proposed predictors of nonlinear damping ratios are verified by comparing with the related formula.
出处
《工程抗震与加固改造》
北大核心
2016年第1期9-14,共6页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金资助项目(50978091
51278181)
教育部博士点基金资助项目(20120161110022)
关键词
混凝土剪力墙
振动台试验
弹性阻尼比
弹塑性阻尼比
reinforced concrete shear wall
shake table test
linear damping ratio
nonlinear damping ratio
