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首页> 外文会议>Conference on Performance-Based Seismic Design of Concrete Buildings: State of the Practice >Recommendations for Modeling the Nonlinear Response of Flexural Reinforced Concrete Walls Using Perform
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Recommendations for Modeling the Nonlinear Response of Flexural Reinforced Concrete Walls Using Perform

机译：用于使用表演模拟弯曲钢筋混凝土墙非线性响应的建议

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The PERFORM-3D software package is used commonly in engineering practice to conduct nonlinear dynamic analyses of reinforced concrete walled buildings to their seismic response. However, few studies have evaluated or improved on common modeling approaches for structural concrete walls. The research presented here was conducted to establish best practices for modeling the full nonlinear response of walls exhibiting common flexural failure modes. First, an experimental data set consisting of eight planar concrete walls was collected; these walls were spanned a range of length-to-thickness ratios, shear stress demands, axial load ratios, and longitudinal reinforcement configurations. For each wall specimen, a reference numerical model was created using typical modeling methods as proposed by Powell. Comparison of simulated and measured cyclic response histories show that typical modeling techniques result in relatively inaccurate simulation of cyclic response and very inaccurate simulation of drift capacity. To improve the model accuracy, experimental data were used to determine appropriate values for the steel and concrete material model cyclic response parameters. Experimental data and mathematical definitions for the concrete compressive energy were used to develop recommendations for defining concrete post-peak stress-strain response to achieve accurate, mesh-independent simulation of drift capacity. Finally, recommendations for the minimum number of elements were examined. Comparison of simulated and measured cyclic response histories show that the new modeling recommendation result in accurate, mesh independent simulation of cyclic response, including drift capacity. Future work will evaluate the proposed modeling approach for asymmetric and flanged walls.
机译：执行-3D软件包通常用于工程实践，以对其地震反应进行钢筋混凝土围墙建筑的非线性动态分析。然而，在结构混凝土墙的常见建模方法上评估或改进了很少的研究。此处提出的研究是为了建立建模墙壁的全部非线性响应的最佳实践，该墙壁呈现常见的弯曲失效模式。首先，收集由八个平面混凝土墙组成的实验数据集;这些壁跨越一系列长度到厚度比，剪切应力要求，轴向载荷比和纵向加强配置。对于每个壁标本，使用鲍威尔提出的典型建模方法创建了参考数值模型。模拟和测量循环响应历史的比较表明，典型的建模技术导致循环响应的相对不准确的仿真和漂移容量的非常不准确的模拟。为了提高模型精度，使用实验数据来确定钢和混凝土材料模型循环响应参数的适当值。用于混凝土压缩能量的实验数据和数学定义，用于制定用于定义混凝土后峰值应力 - 应变响应的建议，以实现准确，网格无关的漂移容量模拟。最后，检查了最低数量元素的建议。模拟和测量循环响应历史的比较表明，新的建模推荐导致循环响应的准确，网格独立模拟，包括漂移容量。未来的工作将评估不对称和法兰墙的建议建模方法。

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