受弯构件的“跨高比”是一个很有用的设计参数,可以在拟定结构方案时作为估算梁、板截面尺寸的参考,也可以通过控制跨高比来满足梁、板的刚度或挠度的设计要求,特别对钢筋混凝土构件,可以避免进行繁复的变形验算。在老设计规范《BJG21-66》中,列出了不需作挠度计算的受弯构件的截面最小高度,也就是受弯构件的容许高跨比,见表1。 The “cross-height ratio” of the flexural member is a very useful design parameter. It can be used as a reference for estimating the beam and plate cross-section dimensions when formulating the structural scheme, and can also be used to control the stiffness of the beam or plate by controlling the height-to-height ratio. Deflection design requirements, especially for reinforced concrete components, can avoid complicated deformation checking. In the old design specification “BJG21-66”, the minimum height of the section of the bending member that does not require deflection calculation is listed, that is, the allowable high-span ratio of the bending member. See Table 1.