隅撑式阻尼减震技术的应用研究

Study on vibration reduction technology of knee-brace type damping

斜撑或人字支撑型阻尼减震方案中阻尼器的安装位置和空间常常受限于工业工艺或建筑功能等方面要求,有时不能安装在最优位置处。隅撑式阻尼减震方案对空间的要求要稍小一些,但其变形幅度较小,需要布置较多数量的阻尼器。通过对单层单跨平面框架的理论分析和基于结构控制benchmark模型的数值模拟,对隅撑式阻尼减震方案的有效阻尼比、结构弹塑性地震响应的减震效果等方面进行了分析,结果表明:隅撑式阻尼减震方案在技术上是可行的,通过合理设计,可以获得与斜撑式阻尼减震方案相近的减震效果;其工程造价要高于后者,但受到的建筑空间限制少于后者,可作为后者的备选方案。

Due to the requirements of industrial process or construction function,the space and installation of dampers in slant or herringbone bracing type are restricted,so as to not be installed in optimal locations. Damper installed like kneebrace needs smaller space,but its deformation is small and more quantity of dampers should be installed. The effective damping ratio and damping effect of seismic response in elastic-plastic structures are analyzed in this paper through theoretical analysis of the single layer and single span plane frame and on the base of numerical simulation of structure control benchmark model with knee-brace type dampers. The results show that: knee-brace type damping scheme is feasible in technology and damping effect,similar to slant bracings,can be obtained through reasonable design; on the other hand,the project cost is higher than the latter,but the limit of architectural space in it is less than the latter,so it can be used as the latter alternative.