钢筋混凝土不等肢异形柱抗剪性能试验研究

为了考察钢筋混凝土不等肢异形柱的抗剪性能,对12个不等肢异形柱试件进行了低周反复荷载作用下的试验研究．试验结果表明：异形柱的2个柱肢均发生较为严重的破坏,翼缘也具有抗剪作用;随翼缘增大,钢筋混凝土不等肢异形柱斜截面的抗剪承载力提高;水平荷载作用方向不同时,不等肢异形柱的抗剪承载力和变形能力不同．根据试验结果,考虑翼缘混凝土对异形柱抗剪承载力的作用对相关规范中给出的公式进行了修正,使之适用于钢筋混凝土异形柱抗剪承载力的计算．     

Experimental Study on Seismic Behavior of Exterior Joints of Special-shaped Columns with Different Lengths of Limbs

Four exterior joints with special-shaped columns which have different lengths of limbs are tested under low cyclic loading. Special-shaped columns adopted are L- and T-shaped in section. It can be concluded that crack pattern, failure mode and shear strength of joints are affected by the length of limb, and that shear strength and ductility increase with the length of limb; the joints with the flexural failure of the beam have better seismic behavior than those with the shear failure of the joint core.