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首页> 外文期刊>International journal of steel structures >Numerical Study and Design Recommendations of Eccentrically Loaded Partially Encased Composite Columns
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Numerical Study and Design Recommendations of Eccentrically Loaded Partially Encased Composite Columns

机译：偏心装载部分包装柱的数值研究和设计推荐

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A numerical investigation is presented in this paper on partially encased composite (PEC) columns subjected to eccentric loading. 3D finite element (FE) models were established based on the dynamic explicit method, which were validated by comparing the FE outcomes with some available test results in previous literature. Using the verified model, a parametric study was conducted to investigate the effects of several factors on the strength and behaviors of PEC columns, including the concrete strength, the steel yield strength, and the load eccentricity. The outcomes of the FE analyses, together with the test results reported in previous studies, were compared with the capacities predicted by the current design codes for eccentrically loaded PEC columns. It was found that the existing design methods with the assumption of rectangular stress blocks (fully plastic assumption) could be unconservative in some circumstances. Therefore, a modified partially plastic design approach was proposed based on the Eurocode 4 design method, which was confirmed to be conservative yet economic in predicting the interactive force-moment (N-M) capacity of PEC columns under eccentric compression.
机译：本文在经过偏心载荷的部分包装的复合材料（PEC）柱中提出了数值研究。基于动态显式方法建立了3D有限元（FE）模型，通过将FE结果与以前的文献中的一些可用测试结果进行比较来验证。使用验证模型，进行了参数研究，以研究若干因素对PEC柱的强度和行为的影响，包括混凝土强度，钢屈服强度和负载偏心。将Fe分析的结果与先前研究报告的测试结果相同，与电流装载PEC列的当前设计代码预测的容量进行了比较。结果发现，在某些情况下，具有假设矩形应力块（完全塑性假设）的现有设计方法可能是难以置信的。因此，基于欧元展4设计方法提出了一种改进的部分塑料设计方法，该方法被证实是保守的，但在偏心压缩下预测PEC柱的交互力矩（N-M）容量是保守的。

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