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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Structural collapse correlative analysis using phenomenological fiber hinge elements to simulate two-directional column deteriorations
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Structural collapse correlative analysis using phenomenological fiber hinge elements to simulate two-directional column deteriorations

机译：使用现象学的纤维铰链元素模拟结构双向倒塌的结构倒塌相关分析

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This paper presents three-dimensional nonlinear dynamic analyses of a full-scale four-story steel building tested to collapse in 2007 at the E-Defense shake-table facility in Japan, using strong ground motion. Local buckling and consequent strength deterioration of all six columns at the first-story level were observed as the main reason for the building collapse. Fiber hinge element that consists of fibers discretizing the column cross section is used model each end of the column. It has zero length but considers finite yield-zone length for the fiber to simulate elastoplastic behavior and local buckling. Other parts of the building are modeled by standard column, beam, truss, and spring elements. Despite the unavoidable limitation of the parameters defining the fiber hinge element's properties that are empirically determined from the behavior of the cantilever column tested using an identical steel member, the analysis using the element appears to simulate well the column behavior because of the axial load and biaxial bending moment whose relative magnitudes differ considerably because of the locations. The analysis results indicate different deterioration patterns of the columns and effects of complex loading such as compression and tensile axial load applied alternately, additional high frequency axial load caused by vertical accelerations, and shifting of the principal directions of the bending moments cycle by cycle. Responses such as story drift, accelerations, base shear, and energy dissipation are also simulated well, and progress of local deterioration in the first-story columns and global soft-story mechanism is clarified by the analysis. Copyright (C) 2016 John Wiley & Sons, Ltd.
机译：本文介绍了在日本E-Defense振动台上使用强力地面运动在2007年测试倒塌的四层全尺寸钢结构建筑的三维非线性动力分析。观察到第一层所有六根柱的局部屈曲和强度下降是建筑物倒塌的主要原因。纤维铰链元件由使立​​柱横截面离散的纤维组成，用于建模立柱的每个末端。它的长度为零，但考虑到纤维的有限屈服区长度，以模拟弹塑性行为和局部屈曲。建筑的其他部分通过标准柱，梁，桁架和弹簧元素进行建模。尽管不可避免地限制了纤维铰链元件特性的参数限制，这些参数是根据使用相同钢构件测试的悬臂柱的性能凭经验确定的，但由于轴向载荷和双轴载荷，使用该元素进行的分析似乎可以很好地模拟圆柱体的性能。弯矩，其相对大小因位置而异。分析结果表明，圆柱的不同劣化模式和复杂载荷的影响，例如交替施加压缩和拉伸轴向载荷，垂直加速度引起的额外高频轴向载荷以及弯矩的主要方向逐周期移动。还很好地模拟了诸如故事漂移，加速度，基础剪力和能量耗散等响应，并通过分析阐明了第一层专栏的局部恶化和整体软故事机制的进展。版权所有（C）2016 John Wiley＆Sons，Ltd.

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