LENGTHY LOAD-BEARING STRUCTURAL ELEMENT OF CONSTRUCTION BEAM TYPE FROM POLYMER COMPOSITE MATERIAL Russian patent published in 2015 - IPC E04C3/02 E04C3/28 E04C3/00 C08K7/14 

FIELD: construction.

SUBSTANCE: invention relates to elements of load-bearing structures operating under load and may be used as beams of building structures, slabs in construction of hangars, cross beams of power transmission line supports, etc. The structural element comprises a core and reinforcing layers from layers of glass fabric serially laid at both sides of the core, with attachment of layers impregnated with binder, preferably according to vacuum infusion technology. Layers of reinforcing material are glass fabrics with different angular orientation of fibres relative to the longitudinal axis of the core, layers are formed into identical packages, besides, in most loaded parts of the structural element each package is formed at least from three layers of different glass fabrics, namely: inner central layer - glass fabric, laid so that fibres making this glass fabric are laid at the angles of 0° and 90° relative to the longitudinal axis of the core, and other layers - external to the central layer - from multi-axial glass fabric laid so that fibres making this glass fabric are laid at the angles of 0°, +45° and -45° relative to the longitudinal axis of the core. The binder is a nano-modified epoxide binder of grade VSE-28, and core material is foam polyurethane.

EFFECT: structural element has high resistance to impact of loads, to impact of unfavourable climatic factors, has lower weight and is manufacturable.

4 cl, 3 dwg, 6 tbl