Experimental Study on the Axial Behavior of Cold-Formed Thin-Walled Steel Framing Wall Studs

摘要

A full-scale experimental study on the axial behavior of cold-formed thin-walled steel framing wall studs is presented. The influence of parameters, including whether the studs are sheathed or not, sheathing materials, the screws spacing and the studs spacing, on the bearing capacity of studs under vertical compression is analyzed by the test. The test results of the six wall specimens show that: the load carrying capacity of a stud increases significantly when it is covered with sheathings;;the ultimate load of the stud sheathed with fiber reinforced calcium silicate board(CSB) is about 18.8 percent higher than that sheathed with oriented strand board(OSB);;when the wall frames are sheathed with OSB or plasterboard, the change of screws spacing has little effect on the bearing capacity, however, the bearing capacity of CSB-sheathed wall stud will fall when the screws spacing decreases from 300mm to 150mm;;when the studs spacing increases, the bearing capacity of stud decreases slightly.