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首页> 外文会议>ACI (American Concrete Institute) Fall 2000 Convention, Fall 2000, Toronto >Spring Network Models for Analysis of Reinforced Concrete Columns under Cyclic Loading
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Spring Network Models for Analysis of Reinforced Concrete Columns under Cyclic Loading

机译：循环荷载作用下钢筋混凝土柱分析的弹簧网络模型

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摘要

A computationally efficient procedure is presented for analyzing the performance of reinforced concrete structures under cyclic loading. A rigid-body-spring network is used as a basis of a material representation. Concrete is modeled as an assemblage of discrete particles interconnected along their boundaries through flexible interfaces. Random geometry is introduced using Voronoi diagrams in order to reduce mesh bias on crack propagation. Rather than averaging the effects of reinforcing over a regional material volume, reinforcing bars are explicitly modeled using line elements with nonlinear linkage springs. The spring network has the advantage to model material discontinuities and provides realistic predictions of concrete cracking. The network performance is demonstrated through analyses of reinforced concrete columns under cyclic loading. Numerical results reasonably agree with experimental observations in terms of load carrying capacity and crack propagation. Deterioration of load carrying capacity due to shear failure after or before yielding of main reinforcing steel is discussed through the numerical predictions.
机译：提出了一种计算有效的程序来分析循环荷载下钢筋混凝土结构的性能。刚体-弹簧网络用作材料表示的基础。混凝土被建模为通过柔性界面沿其边界互连的离散粒子的集合。为了减少裂纹扩展时的网格偏差，使用Voronoi图引入了随机几何形状。而不是平均区域材料体积上的钢筋效果，而是使用带有非线性连杆弹簧的线单元对钢筋进行显式建模。弹簧网络的优势在于可以对材料的不连续性进行建模，并可以对混凝土开裂提供现实的预测。通过分析钢筋混凝土柱在循环荷载下的网络性能。数值结果在承载能力和裂纹扩展方面与实验观察结果相当吻合。通过数值预测讨论了在主钢筋屈服之后或之前，由于剪切破坏而导致的承载能力下降。

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