（广州大学土木工程学院， 广州 510006）

［摘要］消能减震结构附加有效阻尼比计算一般采用基于能量的应变能法。相比能量，功率反映能量的耗散效率，具有瞬时特性，对于速度相关型消能器，风振设计时经常要求计算功率，使用功率计算附加有效阻尼比将更加合理直接。推导了基于功率的附加有效阻尼比计算方法（功率计算方法），比较功率计算方法与应变能法的差异性，通过一个多层与一个超高层工程实例对功率计算方法与应变能法的计算效果进行研究。结果表明，应变能法计算结果较为保守，功率计算方法计算结果更符合实际。建议计算速度相关型消能器附加有效阻尼比时优先采用功率计算方法。

［关键词］消能减震结构； 附加有效阻尼比； 功率计算方法； 应变能法

中图分类号：TU318-1文献标识码：A文章编号：1002-848X(2019)11-0109-06

Research on power calculation method of additional effective damping ratio

Zhou Yun, Shang Chenghao

(School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)

Abstract:Energy-based strain energy method is usually used to calculate the additional effective damping ratio of energy dissipation structures. Compared with energy, power reflects energy dissipation efficiency and has instantaneous characteristics. For speed-dependent energy dissipators, the calculation of power is often required in wind-induced vibration design. It is more reasonable and direct to use power to calculate additional effective damping ratio. The power calculation method of additional effective damping ratio was deduced. The difference between power calculation method and strain energy method was compared. The calculation effect of power calculation method and strain energy method was studied through a multi-layer and a super high-rise engineering example. The results show that the strain energy method is more conservative and the power calculation method is more practical. It is suggested that the power calculation method should be preferred when calculating the additional effective damping ratio of velocity-dependent dampers.

Keywords:energy dissipation structure; additional effective damping ratio; power calculation method; strain energy method

作者简介：周云，博士，教授，Email:zhydxs@163.com。