钢筋混凝土框架“强柱弱梁”及轴压比限值的概率分析

从可靠度校准的角度分析了现行建筑抗震设计规范“强柱弱梁”和轴太比限值的概率意义。结合框架和节点试验结果，表明现行规范规定的柱梁弯矩比并不能有效地防止柱铰机构的形成，不同抗震等级框架的轴压比限值的失效概率相差较大。本文认为，在保证相同的延性换效概率的前提下，可以通过提高柱梁抗弯强度比来放宽规范轴压比的限制。最后，探讨了进一步研究的思路和方法。

Probability Analysis of "Strong Beam and Weak Beam" and Axial Compression Ratio in RC Frame

In the view of reliability calibration, this paper analyzes the probabilistic sense of the provisions of "Strong Column and Weak Beam' and axial compression ratio in aseismic criteria (GBJ 11 89), which demonstrates that there is much difference between different aseismic ranks of RC frame. The authors suggest that it is possible to make axial compression ratio larger by adjusting the moment capacity ratio between column and beam. Finally, the direction and method of further studies are proposed.