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首页> 外文期刊>Journal of structural fire engineering >Finite element analysis of tension-loaded ASTM A325 bolts under simulated fire loading
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Finite element analysis of tension-loaded ASTM A325 bolts under simulated fire loading

机译：模拟火荷载下受拉ASTM A325螺栓的有限元分析

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Purpose - Nuts and bolts have been used as fasteners of steel structures for many years. However, these structures remain susceptible to fire damage. While conducting fire experiments on steel structures is sometimes necessary, to better understand their behavior, such experiments remain costly and require specialized equipment and testing facilities. This paper aims to present a highly accurate three-dimensional (3D) finite element (FE) model of ASTM A325 bolt subjected to tension loading under simulated fire conditions. The FE model is compared to the results of experimental testing for verification purposes and is proven to predict the response of similar bolts up to certain temperatures without the need for repeated testing. Design/methodology/approach - A parametric 3D FE model simulating tested specimens was constructed in the ANSYS Workbench environment. The model included the intricate details of the bolt and nut threads, as well as all the other components of the specimens. A pretension load, a tension force and a heat profile were applied to the model, and a nonlinear analysis was performed to simulate the experiments. Findings - The results of the FE model were in good agreement with the experimental results, deviations of results between experimental and FE results were within acceptable range. This should allow studying the behavior of structural bolts without the need for expensive testing. Originality/value - Detailed 3D FE models have been created by the authors have been created to study the behavior of structural bolts and compared with experiments conducted by the authors.
机译：目的-螺母和螺栓多年来一直用作钢结构的紧固件。但是，这些结构仍然容易受到火灾的破坏。虽然有时需要对钢结构进行火灾实验，但为了更好地了解其行为，此类实验仍然昂贵，并且需要专门的设备和测试设备。本文旨在介绍在模拟火灾条件下承受拉伸载荷的ASTM A325螺栓的高精度三维（3D）有限元（FE）模型。为了验证目的，将FE模型与实验测试结果进行比较，并证明该模型可以预测相似螺栓在特定温度下的响应，而无需重复测试。设计/方法/方法-在ANSYS Workbench环境中构建了模拟被测样品的参数3D FE模型。该模型包括螺栓和螺母螺纹的复杂细节，以及样品的所有其他组件。对模型施加预拉伸载荷，拉力和热分布，并进行非线性分析以模拟实验。结果-FE模型的结果与实验结果吻合良好，实验结果与FE结果之间的偏差在可接受的范围内。这应该允许研究结构螺栓的性能，而无需进行昂贵的测试。原创性/价值-由作者创建了详细的3D FE模型，以研究结构螺栓的性能，并与作者进行的实验进行了比较。

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