TEST ON WELDED STEEL TRUSSES ADOPTED T-STRUCTURAL SHAPE FOR CHORD MEMBERS AND STEEL TUBE FOR WEB MEMBERS : Eccentric Panel Points : Part 1

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  • 剛節トラス (弦材 : T 形鋼, 腹材 : 鋼管) の耐力実験 : 偏心剛節点 : その 1
  • 剛節トラス(弦材:T形鋼,腹材:鋼管)の耐力実験 偏心剛節点-1-
  • ゴウセツ トラス ゲンザイ T カタコウ , ハラザイ コウカン ノ タイリョク ジッケン ヘンシン ゴウセツテン 1

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It has been Known experimentally that the Strength and rigidity of welded steel trusses of tubtlar construction will often be decreased by the local deformations taken placed at the panel points. Therefore in order to make these local deformations as small as possible and to utilize the merits in the structural shape-trusses, the authers devise a welded steel truss in which the T-structural shape (half the H-structural shape) is adopted for the chord members and the steel tube for the web members. In this paper a type of the above mentioned welded steel truss is treated, in which the panel points are constructed of the eccentric panel points to make the construction of chord and web members at the panel points as simple as possible. Two specimens are tested for finding their strength and rigidity under the vertical loading at the eccentric panel point, and the results of these tests are compared with the theoretical analysis for the welded steel truss with eccentric panel points. The results are as follows. 1) In the test both specimens of the welded steel truss with eccentric panel points showed nearly the same elastic and plastic behaviors respectively. The elastic behaviors were found to satisfy most of the results of the theoretical analysis and the plastic behaviors were qualitatively explained by using the simple plastic theory. 2) The damages to the panel points in these specimens could not be observed until their breaking loads. 3) The maximum loads (13.90 tons and 13.82 tons) of these specimens were about 4.38 times their allowable load (3.16 tons) in the short time loading used in the structural design and were about 1.78 times the allowable load (7.77 tons) of the truss which has the same members and size and has the non-eccentric panel points constructed of pin joints.

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