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我国砖石结构设计规范(GBJ3-73)第21条规定:当梁直接支承在砌体上时,梁端有效支承长度可按公式(6)计算;又规定:对钢筋混凝土梁,可近似地按公式(7)计算。按前式计算较繁,按后式计算虽然简单,但有时误差很大(详见本文算例),且偏于不安全。为此,笔者推导出了一个计算准确又简单的实用公式,简介如下; 对支承在砌体上的大梁、梁端有效支承长度可
According to Article 21 of China’s Code for Design of Masonry Structures (GBJ3-73), when the beam is directly supported on a masonry, the effective support length of the beam end can be calculated according to formula (6). It also stipulates that: for reinforced concrete beams, it can be approximated Calculated according to formula (7). According to the formula above, the calculation is more complicated. Although the formula is simple, it is sometimes very inaccurate (see the example in this article) and it is unsafe. To this end, the author deduced a practical formula that is accurate and simple to calculate, and the introduction is as follows; The effective support length for the girder and beam ends supported on masonry can be