井字楼盖设计（Well pattern floor design）.doc

井字楼盖设计（Well pattern floor design） Several common problems in structural design of well beam 0 Introduction Due to the large rigidity of the beam in the two directions of longitudinal and horizontal, it is suitable for buildings requiring larger space, such as the entrance hall, dining room, conference room and exhibition hall of civil buildings. Therefore, the structure of well beam system has been widely applied for its rationality of force and arrangement. In this paper, several problems in the design of well beam structure are introduced, which can be referred to for reference. Features of 1 well beam structure: 1.1 reinforced concrete well beam is a structural form evolved from two-way slabs. When the span increases, the thickness of the plate increases accordingly. However, due to the thickness of the plate and the weight increases, and the lower part of the tension zone of concrete is often cracked, can not see the work. Therefore, in the two-way slab span is large, in order to reduce the weight of the floor slab, we can put the plate in the lower part of the tension zone of concrete cut off a part of, let the tensile steel properly concentrated on several fronts, the steel and concrete work together more economically and reasonably. In this way, the two-way slab becomes a box shaped beam in the two directions, and the two directions of Liang Tongchang are equal height, regardless of the primary and secondary beams. 1.2 can form regular beam lattice, the ceiling is more beautiful. The common types of grillage layout are orthogonal, orthogonal, oblique, oblique and oblique. 1.3, compared with the general beam slab structure, it has a large span to depth ratio, and is suitable for buildings which are restricted by storey height and require large span. Design principle of 2 well beam structure 2.1, when there is a column around the well beam, the spacing between the well and the beam can be adjusted to avoid the column. The grid plate near the column needs to be