The application of C b to the design of members subjected to bending including beams as well as members subjected to combined loading, is discussed. The concept of C b and the formula for determining the modification factor is similar when using Allowable Strength Design (ASD) or the Load and Resistance Factor Design (LRFD) method. C b affects cases in which member relax length, L b is greater than L p and thus lateral-torsional buckling (LTB) controls flexural strength. Burgett and Tide offer a method for design of beams with C b >1.0 for the Allowable Stress Design (ASD) method. He recommends using an effective unbraced length instead of the original unbraced length. The amount of gain or benefit from C b varies, depending on section size, material properties, unbraced length, and value of C b.
|Original language||English (US)|
|Number of pages||9|
|Specialist publication||Engineering Journal|
|State||Published - Mar 1 2009|
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction