Optimization Design Of Section For Bisymmetric Built-up Steel H-shaped Beams

摘要

Built-up steel H-shaped beam with variable cross-section design can save steel and realize the economy requirements of structure. The existing design method of variable width of flange of steel beam is only applicable to beam under uniformly distributed load. This paper presents optimization design procedures of the Variable cross-section. The related formulas used to optimization design of section for bisymmetric built-up steel H-shaped beams under concentrated load were derived, and the position of varying cross section of beams under concentrated load was calculated, it is convenient to be used in engineering design, and provides theoretical foundation for variable cross-section design.