Evaluation of the Static Bending Creep of BambooWood Composited IBeam

In order to evaluate the static bending creep (SBC) and service capacity in creepresistance of the bamboowood composited Ibeam （BWIB） which was selfdesigned and selfmade by the project, the rapid creep and 90day creep were tested and analyzed employing ASTM D50504 and ASTM D681502a. Results showed that the SBC of the BWIB accorded with the creep characteristics of common wood material. The total deflection of SBC of the BWIB in 90 days was 5.33 mm, in which the firstday deflection was 1.38mm and the irreversible deflection was 179 mm, which occupied 25.9% and 33.6% of the total 90day deflection respectively. Both the rate of the rapid recovery (Φ=9105%) and the 90day fractional deflection (FD90=155) of BWIB met the requirements of ASTM D5055-04, whose Φ≥90% and of ASTM D681502a, whose FD90<20. SBC had no significant effect on the bending rigidity of BWIB.