Accession Number : AD0623595

Title :   ELASTIC BUCKLING TESTS ON LATERALLY AND TORSIONALLY BRACED TAPERED I-BEAMS.

Descriptive Note : Technical rept.,

Corporate Author : COLUMBIA UNIV NEW YORK DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS

Personal Author(s) : Butler,Donald J.

Report Date : SEP 1965

Pagination or Media Count : 39

Abstract : Presented, are the results of an experimental investigation which studied the influence of lateral and torsional bracing on the elastic buckling strength of tip loaded, tapered, cantilever I-beams. The principal conclusions may be summarized as follows: A single lateral brace at the free end of the beam should be applied to the top (tension) flange for greatest effect. The most effective combination of end lateral brace and midspan lateral brace consists of an end brace on the top flange and a midspan brace on the bottom flange. Intermediate bracing on the top flange has very little influence on the strength of the beam. Relatively modest torsional bracing effectively inhibits lateral buckling; e.g., a typical roof purlin which might be connected to such members would provide sufficient resistance to twist to achieve full or nearly full torsional bracing. (Author)

Descriptors :   (*CANTILEVER BEAMS, BUCKLING), (*BUCKLING, CANTILEVER BEAMS), REINFORCING MATERIALS, FLANGES, STRUCTURAL PROPERTIES, LOADS(FORCES), STEEL, BEAMS(STRUCTURAL)

Distribution Statement : APPROVED FOR PUBLIC RELEASE