Prestressed special-shaped trough plate

Abstract

The invention provides a prestressed special-shaped trough plate. The prestressed special-shaped trough plate comprises a special-shaped concrete slab body and prestressed steel strands buried in thespecial-shaped concrete slab body and taken as main reinforcements. The prestressed special-shaped trough plate is characterized in that the special-shaped concrete slab body comprises a face plate and ribbed beams, the face plate and the ribbed beams are integrated into a whole by pouring, an expanded section flange is arranged at the bottom of each ribbed beam, and longitudinal placing notches are formed in the two sides of the face plate. With the adoption of the prestressed special-shaped trough plate provided with the expanded section flanges at the bottoms of the ribbed beams, the bending resistance of the component is greatly improved, the bearing capacity is improved under the condition of the fixed height of the trough plate, the height of the trough plate is reduced under the condition of the same live load, and meanwhile, the invert arch cracking of the component is effectively controlled under the joint action of the special-shaped concrete slab body and the prestressed steel strands.

Description

technical field [0001] The invention relates to a building prefabricated component, in particular to a reinforced concrete prefabricated slab which is prestressed by a pretensioning method and used in buildings. Background technique [0002] Prestressed double T slabs have the characteristics of large span and good bearing capacity, but there are problems in the treatment of the slab joints and the cracking of the concrete slab under the negative bending moment during the tensioning process, so it is difficult to popularize in engineering applications. The prestressed double T-slabs in the existing public technology cannot use the long-line method to manufacture the prestressed double T-slabs, which reduces the work efficiency of the component manufacturing, and at the same time, the mold has poor versatility, which increases the cost, and the bottom of the rib beam does not adopt the enlarged cross-section flange. Special-shaped ribs, under the same bending moment, the heig...

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Problems solved by technology

[0002] Prestressed double T slabs have the characteristics of large span and good bearing capacity, but there are problems in the treatment of slab joints and cracking of concrete slabs under the action of negative bending moments during the tensioning process, so it is difficult to popularize in engineering applications

The prestressed double T-slabs in the existing public technology cannot use the long-line method to manufacture the prestressed double T-slabs, which reduces the work efficiency of the component manufacturing, and at the same time, the mold has poor versatility, which increases the cost, and the bottom of the rib beam does not adopt the enlarged cross-section flange. Special-shaped ribs, under the same bending moment, the height of the ribs cannot be reduced. When the prestress is released, the concrete panel cracks due to the negative bending moment, which affects the structural performance of the prefabricated components. sex

A kind of pretensioned prestressed special-shaped channel plate with expanded flange at the bottom of the rib beam and easy to manufacture has not been reported

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