サステナブルビル構造システムの柱梁接合部に関する実験

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タイトル別名
  • EXPERIMENTAL STUDY ON BEAM-TO-COLUMN CONNECTIONS FOR A SUSTAINABLE BUILDING STRUCTURE SYSTEM
  • サステナブルビル コウゾウ システム ノ チュウ リョウセツゴウブ ニ カンスル ジッケン

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Two beam-to-columns connection, "steel bar joint" and "end plate joint", for a sustainable building structure system have been developed in the light of increasing demand for sustainability of buildings. In the steel bar joint, a column and a beam are firmly attached by steel bars introducing pre-stress through a column and a certain region of the end of the beam. In the end plate joint, a column and a beam are simply connected by high-tension bolts connecting a column and an end plate that is welded at the end of the beam. In these connections, damages caused by severe earthquakes are concentrated to replaceable components, that is, steel bars and end plates, so that the main members are not damaged and can be re-used. Two series of experiments were conducted to clarify the mechanical characteristics of these connections. As a result, these connections succeeded to avoid the damage of the beam though some of the specimen had some local damage in their column. The rotation capacities of the specimens were quite good. The rigidity of the connections was almost half of the rigid connection in the case that the beam was attached to strong side of the column because of out-of-plane flexibility of the flange of the column. A web of a column is much more flexible so that the rigidity dropped to half of that in the case that a beam was attached to a weak side of the column. The axial behavior of the steel bar was examined by tests and modeled for numerical simulation of the steel bar joints. The result of the simulation using the model showed satisfactory agreement with the experimental results.

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