板 SLABS

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板 SLABS
7．4板的类型
混凝土板主要用于建筑结构上的屋、楼盖结构，可以用于直接浇注在建筑物地基上的地面，可以用于楼层板、停车场、飞机场、快车道等等类似的结构。在建筑上板一般支撑在混凝土梁上，梁和板可整体现浇在一起；此外可以通过石砌体或混凝土墙、型钢杆件结构等等结构支撑在梁上；或直接支撑在梁上；或直接作用在地面结构。
单向板的结构作用主要靠板的支座，即各个方向上板的荷载靠支座传递给主支撑梁,为了减小整体式单向板中板的跨度，应设置次梁；为了减小次梁的跨度，应设置主梁；为了减小主梁的跨度，应设置柱或墙体。

7.4 THE SIDE OF SLABS
Concrete slabs are used mainly for the roofs and floors of buildings, for floors poured directly 01} the sub grade in buildings, or slabs on grades, for parking lots, air fields, roadways, and the like. In build¬ings these slabs may be supported by concrete beams, which are almost always cast monolithically with the slabs; by masonry or concrete walls; by structural steel members; directly by columns; or continuously by the ground.
The supports of a slab may be so arranged that the structural action is principally one way, which means that the loads are carried by the slab in the direction normal to the main supporting beams. See Figure7.16.

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