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REINFORCED-CONCRETE ROOF-CEILING CONSTRUCTION WITH INDIRECT PRE-STRESSING WITH FLAT LOWER SURFACE, METHOD FOR PRE-STRESSING OF THE ROOF-CEILING CONSTRUCTION AND METHOD FOR PROVISION OF STABILITY OF THE ROOF-CEILING CONSTRUCTION
REINFORCED-CONCRETE ROOF-CEILING CONSTRUCTION WITH INDIRECT PRE-STRESSING WITH FLAT LOWER SURFACE, METHOD FOR PRE-STRESSING OF THE ROOF-CEILING CONSTRUCTION AND METHOD FOR PROVISION OF STABILITY OF THE ROOF-CEILING CONSTRUCTION
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机译：平底下表面间接预应力的钢筋混凝土屋顶结构，屋顶结构的预应力方法和屋顶结构的稳定性提供方法
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摘要
The indirectly prestressed concrete roof-ceiling construction is prefabricated element for constructing industrial large-span buildings. The construction comprises distinctly wide and thin concrete soffit plate (1) and upper concrete girder (2), of the inverse ôVö- shaped cross section, interconnected by slender steel pipe-rods (3) that are used to stabilize the upper girder (2) against lateral buckling and prevent parts (1) and (2) to get closer or apart each to another. Prestressing of the soffit plate (1) causes compression in the upper girder (2) which passively (indirectly) pushes the ends of the construction, acting on some eccentricity over the center of gravity of the cross section, causing rotation of its ends bending in that way the soffit plate upwards. There are two efficient methods of prestressing these construction.
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