新的<em>k</em><sub>h0</sub>-法计算单筋梁

新的k_h0-法计算单筋梁

摘要: 介绍一新的钢筋混凝土单筋梁的配筋计算方法和算例，该法在混凝土受压区采用矩形加抛物线的应力分布，在计算中求解的未知量是混凝土边缘压应变或受拉钢筋应变，而不是“等效矩形应力”法中的受压区高度。该法是欧洲规范Eurocode 2中采用的方法，计算过程简便，求得配筋后，无须在验算受压区高度；此外，还可用于弯压或弯拉构件的配筋计算。计算结果中除了含有计算钢筋面积的钢筋系数外，还有混凝土受压区边缘应变、受拉钢筋应变、受压区高度及内力臂系数等，结果一目了然。

Abstract: _{A new method for calculation of singly reinforced concrete beam and some related examples are introduced. The method uses a rectangle-parable stress distribution in the compression zone. Instead of the height of equivalent rectangular stress distribution, the strain of reinforcement should be at first solved from equilibrium equations. This method is adopted in Eurocode 2. The calculation is simple and a check of the height of compression zone is not necessary. In addition, it can be used for the computation of bending-tensile or bending-compressive members. Besides coefficient for the determination of section area of steel rods, there are some other desired quantities, such as the strain of concrete and reinforcement, the height of compression zone and the ratio of internal lever arm to effective depth.}