FIELD: construction.
SUBSTANCE: metal whole beam of rectangular, box or double-T cross-section includes beam itself made of rolled or fabricated sections, support devices manufactured according to hinge support or rigid fixing of its ends scheme. The beam is made stepped-variable rigid, at that sections with higher bending rigidity are located under epure of bending moments with extreme ordinates and rational ratios of section lengths and their bending stiffness are selected from condition of equality of absolute values of allowed normal stresses in cross-sections with maximal and minimal values of bending moments.
EFFECT: reduction of metal whole beam materials consumption due to change of its bending stiffness along length and bending stiffness of there sections.
5 cl, 5 dwg
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|---|---|---|---|
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| PLANK BEAM | 2022 |
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| MULTI-PURPOSE BUILDING | 2007 |
|
RU2345200C2 |
