大偏心距夹心梁柱节点抗震性能试验
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重庆市科技攻关资助项目(CSTC,2010AB0007)


Experimental study on seismic behavior of beam-column sandwich joints with big beam-column eccentricity
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    摘要:

    完成了3个梁柱偏心距大于1/4柱宽的夹心十字型平面节点试件的低周反复加载试验,对试件的抗震性能、损伤过程、失效模式、位移延性、节点区受剪承载力等方面进行了分析.结果表明此类偏心夹心节点具有良好的承载能力和抗震性能,并且可以用X筋替代部分节点区箍筋承担节点区剪力,但梁筋在节点区的锚固性能较弱.与普通夹心节点相比,大偏心夹心节点核芯区附近柱纵筋受力较为不利.

    Abstract:

    Three specimens of sandwich joints with eccentricity being larger than a quarter of the column width in middle floor of frame are designed and loaded under cyclic loading. Their shear capacity, failure modes, and ductility, as well as energy dissipation are analyzed. The results show that the performance of sandwich joints with big eccentricity is good under cyclic loading. X-type reinforcements can be used to substitute for stirrups in the joint to bear shear forces. But the anchorage of longitudinal bars of beams in eccentric sandwich joints is relatively weak. Comparing to sandwich joints without eccentricity, the column longitudinal bars near the sandwich joints with big eccentricity are vulnerable to sudden change of strain.

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华建民,陈祥,曹晖.大偏心距夹心梁柱节点抗震性能试验[J].重庆大学学报,2011,34(8):128-133.

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  • 收稿日期:2011-05-04
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