Viscoelastic damper is an effective passive damping device,which can reduce the seismic response of the structure by increasing the damping and dissipating the vibration energy of structures.It has a wide application ...Viscoelastic damper is an effective passive damping device,which can reduce the seismic response of the structure by increasing the damping and dissipating the vibration energy of structures.It has a wide application prospect in actual structural vibration control because of simple device and economical material.In view of the poor seismic behaviors of assembled frame structure connections,various energy dissipation devices are proposed to improve the seismic performance.The finite element numerical analysis method is adopted to analyze relevant energy dissipation structural parameters.The response spectrum of a 7-story assembled frame structure combined the ordinary steel support,ordinary viscoelastic damper,and viscoelastic damper with displacement amplification device is analyzed.The analysis results show that the mechanical behavior of assembled frame structure with ordinary steel supports are not significantly different from those without energy dissipation devices.The assembled frame structure with viscoelastic damper has better seismic performance and energy dissipation,especially for the viscoelastic damper with displacement amplification devices.The maximum value of inter-story displacement angle decreases by 32.24%;the maximum floor displacement decreases by 31.91%,and the base shear decreases by 13.62%compared with the assembled frame structures without energy dissipation devices.The results show that the seismic fortification ability of the structure is significantly improved,and the overall structure is more uniformly stressed.The damping structure with viscoelastic damper mainly reduces the dynamic response of the structure by increasing the damping coefficient,rather than by changing the natural vibration period of the structure.This paper provides an effective theoretical basis and reference for improving the energy dissipation system and the seismic performance of assembled frame structures.展开更多
第12届美国地震工程会议于2022年6月27日~7月1日在盐湖城市举办,会议主题为“重新构想风险与韧性”(Reimaging Risk and Resilience),集中体现过去4年各国学者在地震工程领域的最新研究成果。在抗震设计理念从“延性”到“韧性”的转变...第12届美国地震工程会议于2022年6月27日~7月1日在盐湖城市举办,会议主题为“重新构想风险与韧性”(Reimaging Risk and Resilience),集中体现过去4年各国学者在地震工程领域的最新研究成果。在抗震设计理念从“延性”到“韧性”的转变中,消能减震技术对结构抗震韧性提升方法与策略成为研究热点。本文细化“韧性”提升路线,从可更换损伤元、自复位阻尼器和抗震韧性减震结构三个层面梳理消能减震技术研究进展;洞察消能减震技术发展趋势——韧性减震装置,从“韧性”视角重新审视现有减震装置研究关键与难点;展望消能减震技术在结构抗震韧性提升方法与策略中的研究方向。展开更多
基金supported by Foundation of Henan Educational Committee(20A560004,J.Z.)Foundation of Henan Science and Technology Project(182102311086,Y.W.)Foundation for University Key Teacher(YCJQNGGJS201901,J.Z.,YCJXSJSDTR201801,Y.W.,Henan University of Urban Construction).
文摘Viscoelastic damper is an effective passive damping device,which can reduce the seismic response of the structure by increasing the damping and dissipating the vibration energy of structures.It has a wide application prospect in actual structural vibration control because of simple device and economical material.In view of the poor seismic behaviors of assembled frame structure connections,various energy dissipation devices are proposed to improve the seismic performance.The finite element numerical analysis method is adopted to analyze relevant energy dissipation structural parameters.The response spectrum of a 7-story assembled frame structure combined the ordinary steel support,ordinary viscoelastic damper,and viscoelastic damper with displacement amplification device is analyzed.The analysis results show that the mechanical behavior of assembled frame structure with ordinary steel supports are not significantly different from those without energy dissipation devices.The assembled frame structure with viscoelastic damper has better seismic performance and energy dissipation,especially for the viscoelastic damper with displacement amplification devices.The maximum value of inter-story displacement angle decreases by 32.24%;the maximum floor displacement decreases by 31.91%,and the base shear decreases by 13.62%compared with the assembled frame structures without energy dissipation devices.The results show that the seismic fortification ability of the structure is significantly improved,and the overall structure is more uniformly stressed.The damping structure with viscoelastic damper mainly reduces the dynamic response of the structure by increasing the damping coefficient,rather than by changing the natural vibration period of the structure.This paper provides an effective theoretical basis and reference for improving the energy dissipation system and the seismic performance of assembled frame structures.
文摘第12届美国地震工程会议于2022年6月27日~7月1日在盐湖城市举办,会议主题为“重新构想风险与韧性”(Reimaging Risk and Resilience),集中体现过去4年各国学者在地震工程领域的最新研究成果。在抗震设计理念从“延性”到“韧性”的转变中,消能减震技术对结构抗震韧性提升方法与策略成为研究热点。本文细化“韧性”提升路线,从可更换损伤元、自复位阻尼器和抗震韧性减震结构三个层面梳理消能减震技术研究进展;洞察消能减震技术发展趋势——韧性减震装置,从“韧性”视角重新审视现有减震装置研究关键与难点;展望消能减震技术在结构抗震韧性提升方法与策略中的研究方向。
