钢筋混凝土矩形截面单跨双坡梁在均布荷载作用下,梁的最大配筋及其截面可用下列方法计算: 先把双坡梁假定为高为梁中点的等截面梁,设其混凝土抗弯强度为R′_w,令R′_w=(?)(其中R_w为混凝土的弯曲抗压计算强度,q为每厘米上的计算荷载,b为矩形梁的宽度,单位:厘米,K为坡度系数)。用此等截面梁的跨中弯矩M_中和梁中点高度及R′_w,可按一般方法算出钢筋数量,实际上就是危险截面的钢筋数量。并将算出的钢筋数量A_g代入式 For single-span double-slope beam with reinforced concrete rectangular cross section, under uniform load, the maximum reinforcement of the beam and its cross section can be calculated by the following methods: First, the double-slope beam is assumed to be a beam with equal height at the middle point of the beam, and its concrete bending strength is set. For R’_w, let R’_w = (?) (where R_w is the calculated bending strength of the concrete, q is the calculated load per centimeter, b is the width of the rectangular beam, in cm, and K is the gradient factor) . Using the mid-span bending moment M_ of this section beam and the midpoint height of the beam and R′_w, the number of steel bars can be calculated by the general method, which is actually the number of steel bars with dangerous sections. And substitute the calculated number of reinforcing bars A_g into