论文部分内容阅读
例题:已知楼板与平台板的标高分别为4.136米和2.000米,楼板梁边与平台梁边的净距为3140毫米。试设计一板式楼梯(楼板梁和平台梁的截面尺寸均为200毫米×300毫米)(图7)解答:(一)楼梯板的材料标号混凝土用200号,钢筋用Ⅱ级钢筋。(二)楼梯板的几何尺寸1.确定踏步尺寸。根据楼板与平台板的标高,可算出两者的高度差为4.136-2.000=2.136米=2136毫米。如采用12级踏步,则踏步高c=2136毫米÷12=
Example: It is known that the elevations of floor slabs and platform slabs are 4.136 m and 2.000 m, respectively, and the clear distance between the edge of floor slabs and the edge of the platform girders is 3140 mm. Try to design a slab staircase (floor beams and platform beams are 200 mm × 300 mm in cross-section) (Figure 7) Solution: (a) The material number of the stairs is No. 200 for concrete and No. II for rebar. (b) Geometry of stairs 1. Determine the step size. According to the elevation of the floor slab and the platform slab, the height difference between the two can be calculated as 4.136-2.000 = 2.136 m = 2136 mm. If using 12 steps, the step height c = 2136 mm ÷ 12 =