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本文根据实际设计体验讨论带斜肋的钢筋混凝土双曲扁壳屋盖的计算方法(见图1)。扁壳所采用的曲面为沿对角线方向的滑动曲面,主曲率半径R=45.46米,矢高f=7.33米,在边缘构件上拱的矢高f_x=f_y=3.82米。肋的布置平面见图2,所加肋的截面为18×25厘米,肋的间距为3.536米;边缘构件采用有预应力拉杆的双铰拱,拉杆分批施加预应力,以控制边拱的弹性变形使得更符合于简支的边界条件。屋面支于四角的柱子上,为减少不均匀下沉采用了钢筋混凝土桩基础。壳体采用顶升法施工,利用高为0.5米的柱块逐
Based on the actual design experience, this article discusses the calculation method of a reinforced concrete hyperbolic flat shell roof with oblique ribs (see Figure 1). The curved surface adopted by the flat shell is a sliding surface along the diagonal direction. The main radius of curvature is R=45.46 meters, and the vector height is f=7.33 meters. The height of the arch on the edge member is f_x=f_y=3.82 meters. The layout of the ribs is shown in Fig. 2. The section of the ribs is 18 × 25 cm and the spacing of the ribs is 3.536 m. The edge members are double hinged arches with prestressed tie rods. The tie rods are prestressed in batches to control the side arches. The elastic deformation makes it more consistent with the simply supported boundary conditions. The roof is attached to the pillars on the four corners, and reinforced concrete pile foundations are used to reduce uneven sinking. The shell is constructed using the jacking method, using column blocks that are 0.5 meters high.