【摘要】 基于房屋结构顶点位移,提出了一种简单、直接的被动消能结构加固设计方法;通过Push-over分析将多自由度体系等效为单自由度体系,由被动阻尼器的有效阻尼比和有效刚度的相关性,提出简单的迭代方法确定满足结构等效单自由度体系性能目标所需的附加有效阻尼比和有效刚度,并对阻尼器在多自由度体系中的分配提出建议;采用该方法对某10层钢筋混凝土框架结构进行了加固设计。分析结果表明:该方法在Pushover适用范围内可以取得满意的精度,不同的阻尼器分配模式减震效果不同。更多还原

【Abstract】 A simple and straight retrofitting design method was put forward based on roof displacement of building structure for passive energy dissipation.By Pushover analysis,a multi-degree-of-freedom system was transformed into an equivalent single-degree-of-freedom system.According to the dependence relationship between damping ratio of passive dampers and stiffness,an iteration method was presented.Then supplemental effective damping ratio and effective stiffness required to meet the performance criterion of the equivalent single-degree-of-freedom system could be solved conveniently by standard software through simple iterative computation,and two damper distribution patterns in multi-degree-of-freedom-system were also proposed.The procedure was applied to a ten-storey reinforced concrete frame structure for verification of the proposed method.The analytical results show the methods that can make satisfactory accuracy achieved for structure in Pushover analysis can be applied.The effects of energy dissipation for different damper distribution patterns are different.更多还原