Study On The Application Of Steel Castellated Beams

The theoretical and experimental studies on hexagon hole and circular hole steel castellated beams are included in this paper. Based on the structural steel specification of our country, the author advances the simplified strength and stability calculation methods for these two hole's types of castellated beams, and draws up diagrams of involved parameters to simplify the complex designing calculation process greatly. The carrying capacity table of hexagon hole castellated beams had also been compiled. After the theoretical analysis on optimization design of the sections of these two hole's types of steel castellated beams. The author made suggestions for choosing values of the best beam expansion ratio, beam bridge height and beam pier width. In order to ascertain the worst section under various load cases, this paper studies and analyses the stress distribution on the hole edge of the circular hole castellated beams under loads acting. For the purpose of a contrast analysis, the author made three experimental beams, one was hexagon hole castellated beam and the other two were circular hole castellated beams. The mechanical characteristic and carrying capacity etc. of these two kinds of beams had been contrasted and analyzed. For verifying the precision and reliability of the simplified theoretical calculation methods, the simplified theoretical calculation and the experiment results of these two kinds of beams had also been contrasted and analyzed.