Bending beam and method of making same

Details Bending beam and method of making same Bending beam and method of making same

1974-04-03

1976-07-06

Love, John J.

Railways

Suspended

Double inner rail

52724, 104108, 104118, 105141, 138117, 138177, 138178, E04C 3293, E01B 2522, B61B 300, B61B 500

Patent

active

039675602

ABSTRACT:
Bending beam arrangement for use in supporting elevated trains and the like, and method of making same. The profile member beam is formed as a composite structure having steel profilemember and a concrete profile member connected thereto. The concrete profile member is disposed and configured so as to maximally absorb the compression forces experienced by the bending beam while minimizing the total cross sectional area of the concrete so that the overall weight of the bending beam is maintained at a minimal level. By absorbing the compressive forces on the composite beam and thereby preventing buckling of the steel beam, a thin walled steel beam construction can be utilized hence substantially only significant tensile forces need be accommodated thereby. Various preferred geometrical embodiments are included with means being provided in each embodiment to accommodate supporting and guiding of an elevational or suspended train vehicle for movement therealong. Several preferred embodiments include closed profile steel girders having the concrete profile girder disposed inside the hollow space formed thereby. Other preferred embodiments of open steel beam construction are also included. In one preferred embodiment two pipes of different sizes are arranged one inside the other to form the steel profile member with a hollow space formed between the two pipes being filled with concrete constituting the compressive reinforcing concrete girder. In this last-mentioned embodiment, a longitudinal slot through both pipes is provided at the contact surface thereof for accommodating suspension of a train vehicle. The hollow space inside of the inner tube or pipe accommodate guide wheels for the vehicle as well as driving mechanisms and other support equipment. The method of manufacturing preferred embodiments of the composite steel concrete beam include controlling the temperature of the concrete mixture during curing so as to prevent formation of stresses due to dimensional changes in the concrete during curing.

REFERENCES:
patent: 980191 (1911-01-01), Boynton
patent: 1340454 (1920-05-01), McClenahan
patent: 1977371 (1934-10-01), Bauer
patent: 3059588 (1962-10-01), Chadenson
patent: 3090326 (1963-05-01), Goodell et al.
patent: 3236192 (1966-02-01), Esquillan
patent: 3291394 (1966-12-01), Wheeler
patent: 3385015 (1968-05-01), Hadley
patent: 3550339 (1970-12-01), Yanai

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