附加消能支撑的结构减振试验研究

Experimental Research on the Structure with Energy Dissipation Brace

介绍了空框架以及附加单向斜撑、小八字撑以及小八字曲拐撑的4种结构的自由振动试验以及正弦稳态激振试验,比较了其消能能力.在正弦稳态激振试验中,分别在柱端施加不同的位移,测试其在不同频率下框架及阻尼器的力-位移滞回曲线.结果表明,附加黏弹性消能支撑后,结构的刚度改变不大,而结构阻尼和消能能力增大,从而有效地保护主体结构在振动中免遭破坏;通过对结果分析比较,得出空框架本身的耗能能力有限,而相对单向斜撑和小八字撑而言,小八字曲拐撑有着较好的消能能力,值得推广应用。

This paper presents natural vibration experiment and sine excitation experiment of the frame with different energy dissipation braces （the little character brace or the unidirectional diagonal brace or the little- character-toggle-brace）and compared their capability of energy dissipation. In the sine excitation experiment, different displacement is applied to the column, the force-displacement stagnant curves of the frame and the viscoelastic damper in different frequency are tested. The result indicates that the stiffness of the structure has little change but its damp and dissipation energy capability increase. So the brace protects the structure from destroying. In contrast, the energy dissipation capability of little-character-toggle-brace is stronger than the little character brace and the unidirectional diagonal brace and deserves generalization application.