【摘要】 在地震作用下,多高层钢框架结构主要发生剪切型变形,下部楼层相对位移较大,故应在下部楼层附加位移相关型阻尼器(如金属阻尼器)。下部楼层附加金属阻尼器后对结构进行地震反应时程分析,可知上部楼层的层间速度明显大于下部楼层,因而可以在上部楼层附加速度相关型阻尼器(如黏滞阻尼器),如此就得到同时附加位移和速度相关型阻尼的钢框架消能减震结构。本文通过数值分析首先阐明同时附加位移和速度相关型阻尼的设计思想以后,介绍了基于等效线性化理论和减震性能曲线的消能结构设计方法,并利用此方法研究了结构同时附加金属阻尼器和黏滞阻尼器的消能减震结构设计方法。结果表明,该结构减震效果比仅附加金属或仅附加黏滞阻尼结构的减震效果要好。更多还原

【Abstract】 Multistory and high-rise steel frame structures always appear shear deformation under earthquake action.The relative displacement of lower floors is lager than upper floors.So the displacement-related damper(such as metal dampers) can be added to lower floors.The structure with which the lower floors have added displacement-related dampers is analyzed by time history analysis of earthquake response.It shows that the relative velocity of upper floors is obviously lager than the lower floors.So the velocity-related damper(such as viscous dampers) can be added to upper floors.According to this idea,the structure with displacement-related dampers and velocity-related dampers can be got.Firstly,the idea is introduced after numerical analysis of structure.Secondly,based on the equivalent linearization theory and vibration-absorption performance curve,the design method of energy dissipation structures is proposed.Thirdly,the design method was used to research the structure with displacement-related dampers and velocity-related dampers.Results show that the damping effect of the structure with metal dampers and viscous dampers is better than the structure only with metal dampers or only with viscous dampers.更多还原