摘要
结合我国抗震设计规范,提出被动耗能减震结构基于能力谱法的抗震设计方法。在该方法中,结构的性能水平用层间位移角限值予以量化,以简化方法计算速度相关型阻尼器的等效阻尼比。该法首先对经过初步设计的建筑结构进行推覆分析以评估其抗震性能,然后依据性能目标要求选择阻尼器的参数和数量,并对设置阻尼器的结构再次进行推覆分析以检验层间位移角是否满足性能目标要求。通过算例,介绍用该方法对钢筋混凝土规则框架进行消能减震设计的设计过程。实例分析表明,提出的被动耗能减震结构基于能力谱法的抗震设计方法是可行的,并且与非线性动力分析得出的平均结果吻合较好。
A seismic design procedure for energy dissipation systems is proposed by using the capacity spectrum method in combination with Chinese seismic design code. The performance level is quantified by the inter-story drift ratio, and the equivalent damping ratio is evaluated by the simplified method in the proposed procedure. Nonlinear static analysis is conducted for the evaluation of the seismic performances of structures without supplement dampers. The size and number of dampers are selected according to the requirements of the prescribed performance objective. Pushover analysis is carried out for structures with supplement dampers to verify whether the inter-story drift satisfies the prescribed performance criterion or not. Application of the procedure is illustrated by using a regular reinforced concrete frame with visco-elastic dampers. The results from the case study indicate that the proposed method is simple, feasible, and agrees well with nonlinear dynamic analysis.
出处
《土木工程学报》
EI
CSCD
北大核心
2006年第7期26-32,共7页
China Civil Engineering Journal
基金
陕西省自然科学基金(2003EZ15)
陕西省教育厅专项基金(05JK236)
关键词
能力谱法
性能目标
等效阻尼比
被动耗能减震
capacity spectrum method
performance objective
equivalent damping ratio
passive energy dissipation systems
