Translated Title
Experimental research on RHS and CHS truss with concrete filled chord
Translated Abstract
The paper describes a study on the effect of concrete filled chord in rectangular hollow section (RHS) and circular hollow section (CHS) steel tube truss. Tests on trusses made with RHS and CHS steel tube with three types were carried out, with the first type specimens being RHS and CHS trusses, the second type specimens being RHS and CHS trusses with concrete filled in the compressive chord, and the third type specimens being RHS and CHS trusses with concrete filled in both the compressive and the tension chords. Test results indicated that all rectangular section truss specimens failed in the joints. The failure of RHS truss was due to the compressive chord plastification, the other two were due to the flange punching failure mode of tension chord wall which connected with the tension branch. The CHS truss and CHS truss with compressive chord concrete-inside tailed due to the chord plastification, while the failure of the CHS truss with both chord concrete-inside was due to the tension brace broken. Concrete-filled in chord can not only help reinforcing steel tube, but also enhance the strength and rigidity of the joints, resulting in the increase of the ultimate bearing capacity of the whole trusses. The bearing capacity of test results is lager than the calculations according to corresponding specifications, The impact of the joints deformation should be taken into account when truss deformation is calculated, or the calculations results could be unsafe. RHS and CHS trusses have not much difference in the load bearing capacity and deformation, but with chord filled with concrete, the CHS trusses have the higher capacity of the overall truss and joints, better deformability than the corresponding RHS trusses.
Translated Keyword
bending
circular steel tube
concrete-inside
rectangular steel tube
static test
truss
Access Number
WF:perioarticaljzjgxb201004011
