Abstract
This paper is the continuity of the previous paper (Part 5.1) and the same welded steel trusses as the previous paper are treated, in which the T-structural shape is adopted for their chord members, the steel tube for their web members and the non-eccentric panel point for their panel points. A specimen of the above mentioned welded steel trusses is tested to find its strength and rigidity in elasto-plastic range under the vertical concentrated loading at a panel point of its upper chord member, the results in this test are discussed in comparison with the results of the elasto-plastic analysis, in which some assumptions based on the charactors of trusses are adopted. And the strength and rigidity of the specimen are experimentally compared with those of a specimen with eccentric panel points in the same shape and size. The results are as follows. 1) In the test the yield load of the specimen was about 28 tons and its rigidity for larger load than the yield one remarkably became small. Finally the maximum load of the specimen was decided by the buckling of a web member. The above mentioned elasto-plastic behaviors of the specimen were known to nearly satisfy the results of the theoretical analysis for it. Consequently the yield load of the specimen was found to correspond to a limited load, in which the specimen for welded steel trusses would lose almost its charactors for the trusses and its upper chord member would begin to apply for a simple beam. 2) The dameges to the panel points of the specimen could not be observed in test. 3) The yield load and rigidity of the specimen with non-eccentric panel points were found to become larger than those of the specimen with eccentric panel points.
