阻尼器布置偏心距对阻尼器耗能的影响研究

Study on the influence of eccentricity of damper arrangement on energy dissipation of damper

在结构的消能减震中,粘滞阻尼器常采用悬臂墙式布置。研究发现,在实际使用过程中,悬臂墙式阻尼器不同的偏心距会进一步影响阻尼器在结构中的耗能效果。为了分析阻尼器布置偏心距对其耗能的影响,从而修正结构附加阻尼比,引入阻尼器布置偏心距位移参数。结果表明:当阻尼器居中布置时,其布置偏心距位移参数大于1,修正后的附加阻尼比计算结果略大于"抗规"计算,这说明"抗规"计算相对保守;当阻尼器布置存在偏心时,其布置偏心距位移参数小于1,修正后的附加阻尼比计算结果小于"抗规"计算,这说明采用修正后的附加阻尼比计算更为合理。这验证了本文提出的基于阻尼器布置偏心距位移参数修正附加阻尼比的计算方法具有更好的计算精度,从而为分析阻尼器在结构中的耗能提供理论指导。

In the energy dissipation of structures, the cantilever wall type arrangement is often used for viscous dampers. It is found that the different eccentricities of cantilever wall dampers will further affect the energy dissipation effect of the dampers. To analyze the influence of the eccentricity of the damper on the energy dissipation and to modify the additional damping ratio of the structure, the displacement parameter of the eccentricity of the damper is introduced. The results show that when the damper is placed in the center, the displacement parameter of eccentricity is greater than 1, and the modified additional damping ratio is slightly greater than the anti-gauge calculation, which shows that the anti-gauge calculation is relatively conservative.When the arrangement of the damper is eccentric, the displacement parameter of the eccentricity is less than 1, and the calculation result of the modified additional damping ratio is less than that of the anti-gauge calculation, which shows that the modified additional damping ratio is more reasonable. It is verified that the method of modifying additional damping ratio based on displacement parameter of the eccentricity of damper arrangement has better calculation precision, which provides theoretical guidance for analyzing energy dissipation of damper in structure.