高效耗能黏弹性阻尼框架结构减震性能研究

Analysis of damping performance of the frame structure with high-efficiency energy dissipation viscoelastic dampers

提出了高效耗能黏弹性阻尼器,研究了该阻尼器对框架结构的减震机理。首先给出了高效耗能黏弹性阻尼器的结构构造,推导了小震、大震与巨震作用下的阻尼放大系数计算公式,由此分析了该放大系数的变化规律。此外,还推导了设置高效耗能黏弹性阻尼框架结构的等效阻尼比。分析表明,框架结构设置高效耗能黏弹性阻尼器在阻尼等效前后顶部位移反应时程曲线相差不超过10%。

A high-efficiency energy dissipation viscoelastic damper(HEVD)is proposed,and the seismic performance of a frame structure with a HEVD is studied.Firstly,the construction of the viscoelastic damper with high efficiency energy dissipation is presented,the formulas for calculating the damping magnification factor under small,large and giant earthquakes are derived,and the variation law of the magnification factor is analyzed.In addition,the equivalent damping ratio of the frame structure with the HEVD is derived.The analysis shows that the difference of the time-history curve of the top displacement of the frame structure before and after the damping equivalence is not more than 10%.