H形断面鉄筋コンクリートコア壁の水平力ねじり性状に関する研究

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Recently, several high-rise RC structures with core walls have been designed and constructed in Japan. Due to architectural planning requirements, these core walls have often been of the open section type, typically H-shaped. The torsional stiffness of a 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 simultaneous lateral load (bending and shear) and torsion. 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. Through tests and analyses, the following conclusions were obtained: 1) The correlation between the maximum bending moment and the maximum torsion for an H-shaped RC wall is elliptical. 2) The correlation between the maximum shear force and the maximum torsion is likely linear. 3) The calculated maximum moment assuming that only the flange walls resist torsion safely estimates the experimental moment. 4) The nonlinear finite element method can adequately simulate the hysteric behavior of the test specimens. The maximum bending, shear and torsion loads obtained from these analyses correspond closely with the test results. 5) It is understood that the in-plane direction of flange wall bears most of the torsion from the nonlinear finite element analyses.
社団法人日本建築学会の論文
1999-10-30

H形断面鉄筋コンクリートコア壁の水平力ねじり性状に関する研究

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