H形断面鉄筋コンクリートコア壁の水平力とねじりの相関関係

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Recently, several high-rise RC structures with open section core walls, typically H-shaped have been designed and constructed. The torsional stiffness of an open section core wall is smaller than that of a closed section one. However, little research has been carried out on the elasto-plastic torsional behavior of open section core walls. It is important to evaluate the structural capacities of a H-shaped core wall subject to lateral load (bending and shear) and torsional moment simultaneously. Therefore, loading tests and analyses for combined lateral load and torsion were carried out to meet this need. The main parameter of these tests is the ratio of torsional moment to bending moment at the lowest portion of the wall and the loading directions. The specimen with slabs subjected to a pure torsion was tested and investigated. Through tests and analyses, the following conclusions were obtained: (1) The resistant mechanism of a H-shaped wall subjected to simultaneous bending and torsion varies depending on the loading direction. (2) The slabs implove the torsional stiffness and strength of a H-shaped core wall. (3) The nonlinear finite element method can adequately simulate the hysteric behavior of the test specimens. (4) The correlation of lateral load and torsion is determined for each loading direction. The correlation curves at maximum strengths are very nearly elliptical for each direction. Therefore, the overall correlation is close to spherical. (5) The bending strength scarcely deteriorate while the ratio of torsional moment to the bending moment is not more than 25%.
社団法人日本建築学会の論文
2000-06-30

H形断面鉄筋コンクリートコア壁の水平力とねじりの相関関係

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