The Analysis Of Experiment On The Load Carrying Capacity Of The Studs Of The Light Gage Steel Joist Wall

As a new type of residential structure, the lightgage steel joist structure iswidely used in foreign countries. With the development of steel structure in China andthe policy on-steel residential structure coming into existence, the study andapplication of the lightgage steel joist structure seem to be extremely urgent andnecessary.The experiment on the load-carrying capacity of the studs of the lightgagesteel joist wall has been done and the following conclusions are drawn out.1. The buckling load-carrying capacity of the studs has been improved aftertaking the buttressing effect of the wall into account. According to the result of theexperiment, the load-carrying capacity of the test wall studs is about three times ofthe single test studs. So it is reliable and economic to take the buttressing effect ofthe wall into account when performing the design work. Otherwise a widestrength margin shouled be set aside for the load-carrying capcity of the studs.2. The wall has no support during the construction stage and the calculationbased on the national standard GB 50018-2002 (Technical code of cold-formedthin-wall steel, structures) should be reliable and safe. The crankle destabilizationof the studs with cold-formed channel section should be taken into account whencalculating the load-carrying capacity. The warpings at both ends of the sectionshould be calculated without any constraint when converting the crankledestabilization into the slenderness rationλ_w.3. As the weather board has an influence on the studs, the buttressing effectof the wall should be taken into consideration when calculating the load-carryingcapacity of the wall studs. The method how to calculate the buttressing effect ofthe wall isn't given in the national stadandard GB 50018-2002. It is suggested notto consider the bending and buckling for the wall studs according to the experiment result. The load-carrying capacity can be calculated based on thebending and buckling revolving the poor shaft of the section. The length I_oy can be set to 0.65.