对称配筋矩形截面大偏心受压柱正截面受弯承载力Mcua的计算

Calculation of Bending Capacity M of Positive Section of Symmetrically-Reinforced Rectangular Cross-Section Large Eccentric Compression Column

在混凝土结构设计中,框架柱、框支柱的剪力和弯矩计算经常会用到。其中,《混凝土结构设计规范》(GB 50010-2010)(2015年版)中第11.4.3条第1款计算剪力时,条文说明对公式中Mcua的计算过程进行了推导,但推导过程不是很清晰,容易引起误解。本文根据混凝土结构设计的原理,在非抗震和抗震情况下,对Mcua的来历进行了推导,通过精确计算与分析,给出了实用的条件。

In the design of concrete structures,the calculation of shear and bending moments of frame columns and frame pillars is often used.Among them,when calculating the shear force in paragraph 1,Article 11.4.3 of the"Code for Design of Concrete Structures"(GB 50010-2010)(2015 edition),the article states that the calculation process of Mcua in the formula is deduced,but the derivation process is not very clear,which is easy to cause misunderstanding.In this paper,based on the principle of concrete structure design,under non-earthquake and earthquake resistance,the origin of Mcua is derived.Through accurate calculation and analysis,practical conditions are given.