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首页> 外文期刊>Magazine of Concrete Research >A simplified model of catenary action in reinforced concrete frames under axially restrained conditions
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A simplified model of catenary action in reinforced concrete frames under axially restrained conditions

机译：轴向约束条件下钢筋混凝土框架悬链线作用的简化模型

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摘要

From previous experimental studies on missing column scenarios, catenary action could provide beneficial effects on structures during load redistribution after a target column is suddenly removed under an alternative load path procedure to assess structural resistance to progressive collapse. However, full-scale structural tests are costly and time consuming. Equally, finite-element models require in-depth expertise and large computing resources. Practising engineers are not amenable to this approach for preliminary sizing of members or for a quick assessment of structural resilience. To address this need, this paper provides a simplified semi-analytical model for predicting structural response under a column loss scenario. The model is constructed based on finite-element simulations and is verified by test results. The simplified model idealises the structural response of reinforced concrete beam-column sub-assemblages under column loss scenarios as a piecewise multi-linear curve. It shows good agreement with published test results and validated finite-element simulations.
机译：根据先前关于丢失立柱情况的实验研究，在替代荷载路径程序下突然拆除目标立柱以评估结构对渐进倒塌的抵抗力之后，悬链作用可能会对结构重新分配过程中的结构产生有益影响。但是，全面的结构测试既昂贵又费时。同样，有限元模型需要深入的专业知识和大量的计算资源。执业工程师不适合使用这种方法来进行成员的初步规模确定或快速评估结构弹性。为了满足这一需求，本文提供了一种简化的半分析模型，用于预测色谱柱损失情况下的结构响应。该模型基于有限元模拟构建，并通过测试结果进行了验证。简化的模型使钢筋混凝土梁-柱子组合件在柱损失情况下的分段多线性曲线理想化。它与已发布的测试结果和经过验证的有限元模拟显示出良好的一致性。

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