低周反复荷载作用下型钢混凝土异形柱的抗剪承载力分析

Analysis on the shear capacity of irregularly-shaped steel reinforced concrete columns under cyclic reversed loading

从剪应力分布入手,分析型钢混凝土(SRC)异形柱中翼缘对抗剪承载力的影响,得出翼缘对抗剪强度的提高系数。根据试验得到的各构件的破坏形态和破坏机理,分别推导各种配钢形式的SRC异形柱在正向荷载(沿工程轴)以及斜向荷载作用下剪切斜压和剪切黏结破坏的抗剪承载力计算公式,计算结果与试验实测值均吻合较好。理论分析和试验结果表明:T、L形柱的斜向抗剪强度大于正向,而十形柱的斜向抗剪强度小于正向。研究结果可供工程设计参考。

Regarding the shear stress distribution of irregularly-shaped steel reinforced concrete （SRC） columns, the influence of flange on bearing capacity is analyzed, and the amplified coefficient of flange is obtained. Based on the failure characteristics and mechanism derived from the tests, the formulas for calculating the ultimate shear capacity of different irregularly-shaped SRC columns are derived for right angle and oblique angle loadings. The calculation results are in good agreement with test data. It is shown that shear capacity of T, L shaped columns under oblique angle loading are larger than that under right angle loading, whereas the shear capacity of ＋ shaped columns under oblique angle loading are smaller than that under right angle loading.