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钢筋混凝土受弯构件的高跨比,是结构设计中常用的一个参数。用它可以估算梁、板的截面高度。合理地选择高跨比,可以不进行变形验算,满足刚度或挠度的设计要求,从而简化了设计计算。《钢筋混凝土结构设计规范》(TJ10-74)根据其计算公式和有关系数,在附录中按配筋率给出不需作挠度验算的最小截面高度曲线图。其后,《钢筋混凝土结构计算手册》区分主筋保护层尺寸,以[f]=1/200、M_d/M_c=0和均布荷载作用为基本条件,也按配筋率给出简支梁板最小高跨比h/l的曲线图,而非基本条件由修正系数加以考虑。《建筑技术通讯·建
The high-span ratio of reinforced concrete flexural members is a commonly used parameter in structural design. It can be used to estimate the section height of beams and slabs. Reasonably selecting the high-span ratio can eliminate deformation checking and meet the design requirements of stiffness or deflection, thereby simplifying the design calculation. The Design Specification for Reinforced Concrete Structures (TJ10-74), based on its calculation formulae and relevant factors, gives the minimum cross-sectional height profile without the need for deflection calculation in the appendix according to the reinforcement ratio. Subsequently, the “Radiacoconcrete Structure Calculation Manual” distinguishes the dimensions of the main reinforcement protective layer, with the basic conditions of [f]=1/200, M_d/M_c=0, and uniform load acting, and also the simple supported beam slabs according to the reinforcement ratio. The plot of the height-to-span ratio h/l, but not the basic conditions, is taken into account by the correction factor. "Building Technology Communication and Construction