建筑结构轻钢屋面板抗震试验和加固
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摘要
对9个轻钢屋面板试件进行试验研究,以评估其抗震性能。根据当前的隔板设计方法,隔板能够提高承受动力荷载的剪切强度,而不是剪切刚度。此外,随着振幅增大,剪切刚度降低。使用较厚的面板或面板的安装方向与荷载方向平行时,隔板延性将降低。大多数损坏的隔板维修后可达到其初始强度,抗震加固措施能够有效增加电弧点焊/按钮冲隔板的剪切强度和刚度。
An experimental program of nine steel deck roof diaphragm specimens was carried out to assess their seismic characteristics.The dynamically loaded diaphragms were able to develop the shear strength but not the shear stiffness values calculated using current diaphragm design methods.Furthermore , the shear stiffness decreased with increasing excitation amplitude.Diaphragm ductility decreased with the use of thicker deck panels and when the deck was oriented parallel to the loading direction.Most of the damaged diaphragms could be repaired to recuperate their original strength.A seismic retrofit scheme was effective in increasing the shear strength and stiffness of an arcspot weld / button-punch diaphragm.
An experimental program of nine steel deck roof diaphragm specimens was carried out to assess their seismic characteristics.The dynamically loaded diaphragms were able to develop the shear strength but not the shear stiffness values calculated using current diaphragm design methods.Furthermore , the shear stiffness decreased with increasing excitation amplitude.Diaphragm ductility decreased with the use of thicker deck panels and when the deck was oriented parallel to the loading direction.Most of the damaged diaphragms could be repaired to recuperate their original strength.A seismic retrofit scheme was effective in increasing the shear strength and stiffness of an arcspot weld / button-punch diaphragm.
引文
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