This paper presents a numerical study to investigate the blast performance of a plate-reinforced moment-resisting connection using a large concrete filled tubular (CFT) column with dimensions of 1000 × 1000 mm and a thickness of 40 mm. A steel H-section with dimensions of 700 × 300 × 13 × 24 mm is used for beam. The plate-reinforced large CFT connection is analyzed numerically using a finite element code to evaluate its blast resistance. The methodology of modeling the connection is validated based on a past experimental study and verified using an alternate finite element code. Five improvised explosive devices (IED) are considered as blast loadings. The blast resistance of the proposed connection against the IED attacks is investigated based on the design criteria specified in the U.S. government document, UFC 3-340-02, and in comparison to that of a widely used through-diaphragm moment connection. Local failure modes in the vicinity of the connections are also examined. Recommendation is provided for design practice.

中文翻译：

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大型钢管混凝土截面抗弯节点爆破性能的数值研究

本文提供了一个数值研究，以研究使用尺寸为1000×1000 mm，厚度为40 mm的大型混凝土填充管状（CFT）柱的板增强抗弯连接的爆炸性能。梁使用尺寸为700×300×13×24 mm的H型钢。使用有限元代码对板增强的大型CFT连接进行数值分析，以评估其抗爆炸性。基于过去的实验研究对连接建模的方法进行了验证，并使用替代的有限元代码进行了验证。五个简易爆炸装置（IED）被视为爆炸载荷。根据美国政府文件UFC 3-340-02中指定的设计标准，对建议的连接对IED攻击的抗爆炸性进行了研究，与广泛使用的膜片力矩连接相比。还检查了连接附近的局部故障模式。提供了有关设计实践的建议。