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腐蚀后节段式钢箱梁的热点应力研究

New Technology & New Process(2016)

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Abstract
钢箱梁的腐蚀过程复杂多变,且影响钢箱梁腐蚀的因素众多,对于不同的地理环境,钢箱梁表现出的腐蚀规律有较大差别.根据钢箱梁腐蚀的幂函数模型,针对钢箱梁节段式构件,建立了节段式钢箱梁的有限元计算模型,按钢箱梁均匀腐蚀进行处理,并利用外推法等对焊接区域的热点应力进行了计算分析.结果表明,钢箱梁服役一定年限后,由于腐蚀会导致钢箱梁的热点应力超过屈服强度.研究结论可供工程设计参考.
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