斜向往复水平荷载作用下矩形截面框架柱抗震性能
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摘要
通过7根矩形截面钢筋混凝土框架柱试验,研究了不同加载角度时低周往复斜向水平荷载作用下,矩形截面框架柱双向受剪承载力的相关性、滞回曲线特性和延性系数。结果表明,低周往复斜向水平荷载作用下矩形截面框架柱的受剪承载力随加载角度的增大而减小;双向受剪承载力的相关关系可以近似用椭圆方程描述;滞回曲线在形状上与正向水平荷载作用下框架柱的滞回曲线并无明显差异;随着加载角度的增大,框架柱的延性系数有降低的趋势。低周往复斜向水平荷载作用下所有框架柱的破坏均为剪切脆性破坏,应加强其抗震设计。
To investigate the correlation property of bilateral shear strengthes,hysteresis loop property and ductility coefficient of rectangular frame column(RFC) under low-cyclic oblique horizontal load,a total of 7 RFC with different loading angle was tested.The results indicates that the oblique shear strength of RFC was decreased with the increase of loading angle and the relationship of shear strength between X and Y axis of RFC could be described as an elliptic equation.However,there is not significant difference in hysteretic loops of RFC subjected to low-cyclic oblique and forward horizontal loads.With the increase of loading angle,the ductility coefficient of RFC is decreased.Moreover,all RFCs under oblique horizontal load are failure by shear,which was brittle failure,and the anti-seismic design of RFC subjected to oblique horizontal load should be enhanced.
To investigate the correlation property of bilateral shear strengthes,hysteresis loop property and ductility coefficient of rectangular frame column(RFC) under low-cyclic oblique horizontal load,a total of 7 RFC with different loading angle was tested.The results indicates that the oblique shear strength of RFC was decreased with the increase of loading angle and the relationship of shear strength between X and Y axis of RFC could be described as an elliptic equation.However,there is not significant difference in hysteretic loops of RFC subjected to low-cyclic oblique and forward horizontal loads.With the increase of loading angle,the ductility coefficient of RFC is decreased.Moreover,all RFCs under oblique horizontal load are failure by shear,which was brittle failure,and the anti-seismic design of RFC subjected to oblique horizontal load should be enhanced.
引文
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