【摘要】 选用两相邻单自由度体系(2-sdof)作为算例模型进行连接阻尼器的参数优化设计研究,以结构的位移响应传递率为性能指标,推导同时连接金属阻尼器和粘滞阻尼器时结构的位移响应,并基于定点理论得出对应于不同金属阻尼量的最适粘滞阻尼参数公式。根据振动微分方程自编程序,选取两条不同的地震波对结构算例模型进行弹塑性时程分析,依据位移、加速度响应和能量的分布对单质点体系减震性能进行了分析。结果表明:在两相邻结构之间附加按照理论公式得出的阻尼量,能够充分发挥出金属阻尼器和粘滞阻尼器的双重性质,从而使得结构的地震响应得到大幅度地降低。更多还原

【Abstract】 A two adjacent single degree of freedom( 2-sdof) system is chosen as an example to study the optimized parameters of the connection dampers. The structural displacement response transfer rate is regarded as a performance index,and the structural displacement responses are deduced as metallic dampers and viscous dampers being attached to the system simultaneously. Then optimal viscous damping parameter formula is obtained corresponding to the different metal damping quantity based on the fixed point theory. An elastic-plastic time history analysis program for structures is built based on the vibration equation of adjacent structures,two different seismic waves are selected to analyze the elastic-plastic time history of the structural model,and the seismic performance of the single point system is analyzed according to the displacement,acceleration response and the distribution of energy based on the modal analysis method. The results show that: when the derived damping based on theoretical formula is applied to the two adjacent structures,the dual properties are fully functioned for metal dampers to control displacements and for viscous dampers to control velocities,therefore the seismic responses of the structures are greatly reduced.更多还原