多高层建筑结构中反弯点法概念辨析

Conceptual differentiation and analysis of anti-bending point method for multi-story and high-rise frame structure

在多年的多高层建筑结构教学及设计、施工实践中发现关于多高层框架计算概念较模糊的问题,尤其是在水平荷载作用计算中,很多人对反弯点法的适用条件i_b/i_c≥3和建筑抗震结构概念设计中的"强柱弱梁"原则认识不清,不能正确理解和正确使用,甚至认为两者是矛盾的,提出了很多质疑。实际上,两者是从两个不同的角度阐述两个问题。文章从框架结构的本质意义出发,对相关概念进行了辨析,以期达到概念清楚、设计正确的目的。

From years of teaching practice, design and construction on multi-story and high-rise building structure, I found that some concepts of multi-story and high-rise building structure in teaching are ambiguous. In the calculation of horizontal load, some people cannot understand the using condition ib/ic ≥ 3 and the design principle of stronger column and weaker beam for aseismic structure. Some people even think the condition and the principle are incompatible. In fact, they are different perspectives of two relative problems. To clear the concept and design correctly, verifications were put forward based on the essential meaning of the building structure.