调谐型颗粒阻尼器简化力学模型及其参数计算方法研究与减震桥梁试验

介绍了调谐型颗粒阻尼器, 进行了基于该阻尼器减震高架连续梁桥缩尺模型的振动台试验；建立了该阻尼器的数值分析简化力学模型, 提出了该模型等效阻尼比的能量估算方法, 并对该阻尼器的减震控制效果进行了有限元数值模拟. 试验与数值模拟结果表明:调谐型颗粒阻尼器可以有效降低高架连续梁桥的地震响应；上述简化力学模型和参数估算方法可以有效模拟调谐型颗粒阻尼器的减震控制效果, 可为基于颗粒阻尼器的土木工程结构减震设计参考.

EXPERIMENTAL AND THEORETICAL RESEARCH ON THE SIMPLIFIED MECHANICAL MODEL OF A TUNED PARTICLE DAMPER,ITS PARAMETER DETERMINATION METHOD AND EARTHQUAKE-INDUCED VIBRATION CONTROL OF BRIDGE

This paper presents an experimental research on a tuned particle damper attached to a scaled continuous viaduct. A simplified mechanical model for the damper used in finite element method was established to simulate the controlling effects of the damper. An analytical energy method was established to estimate the equivalent additional damping ratio of the damper. The experimental and computational results show that tuned particle dampers can effectively reduce the seismic response of the model bridge. The simplified mechanical model and the analytical energy method are effective in simulating the controlling effects of the tuned particle damper. The simplified mechanical model and the analytical energy method provide certain theoretical guidance for the application of particle damping in civil engineering.