HYBRID SPAN STRUCTURE WITH PRESTRESSED BEAMS FROM POLYMER COMPOSITE MATERIAL AND REINFORCED CONCRETE SLAB FROM ABOVE Russian patent published in 2016 - IPC E01D2/00 

FIELD: construction.

SUBSTANCE: invention relates to bridge engineering. Hybrid span structure with prestressed beams from polymer composite material and with reinforced concrete slab above consists of, at least two identical beams, connected by lateral braces and reinforced concrete slab included into beams operation using metal thrusts. Beams are made from polymer composite material and each is formed from arranged in two or three tiers polymer composite shapes, each having wall and two flanges, connected to each other along adjoining planes and connected by lateral braces made in form of diaphragms from polymer composite shapes. During making of beams tiers are preliminarily bended for creation of camber and prestress and combining into finished beam in cambered position. Beams are separated by joints on section with length, making part of span length, and beams camber is created due to their profile knees at splicing points and preliminary sections bending within their length or without preliminary bending.

EFFECT: use of polymer composite material as beams material for hybrid span structure reduces structure weight, lighten bridge supports, lowers cost of transport and construction operations; use of identical beams as span structure structural element, allows to produce simple design with minimum number of mounts of different types; tier-like segmentation of beams enables to design them from standard composite shapes; use of diaphragms as lateral braces between beams enables to make diaphragms from same as beams composite shapes; preliminary beams tiers hogging to create camber and tiers connection to each other in cambered state creates prestress in beams, which allows to reduce total stresses from all loads and due to it reduce material consumption; beams segmentation into separate sections, which length is part of span length, makes it possible to organize their delivery to country's hard-to-reach areas by any type of transport.

1 cl, 3 dwg