基于耗能减震结构耗能装置的优化设置的研究

Research on optimization setting based on passive energy dissipation structural device

在建筑物中设置耗能减震装置,已在抗震领域研究多年,而阻尼安装位置的优化确是摩擦阻尼器应用中面临的主要问题之一.相同数量的阻尼器,不同的布置位置,将会对主体结构的消能减震作用产生较大影响.对此,本文以某八层框架为例,通过ANSYS有限元软件对结构进行八度多遇及罕遇地震作用分析,得出了结构在无阻尼、循环优化法及遗传算法再优化三种情况下结构的地震响应.计算结果表明,安装摩擦阻尼器的消能减震结构抗震性能明显提高;在摩擦阻尼器数量一定的前提下,通过遗传算法对阻尼器位置布设的进一步优化有利于减小结构地震响应,提高结构抗震性能.

Setting energy dissipator in the building has been in research for many years in the seismic field.One of the friction damper application problems is the damper setting place.There is great influence on energy dissipation in structure whether the damper setting place is optimized under the same number of the dampers.Eight degrees multi-in earthquake and rare earthquake dynamic time history analysis was done in an eight-floor frame by ANSYS finite element software.Three conditions of structural dynamic response are obtained：no friction damper,friction damper optimized by cycled optimum method,and friction under GA method.The results show that the structure,with friction damper installed,can markedly improve the seismic ability,and the optimization of friction damper installation place will be greatly helpful for reducing the structural dynamic response as the number of friction damper is determined.