吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (12): 3481-3491.doi: 10.13229/j.cnki.jdxbgxb.20220182
• 交通运输工程·土木工程 • 上一篇
Nai-jie CHAI(),Wen-liang ZHOU()
摘要:
钢筋混凝土桥梁耐久性评估属于在不确定环境下的多属性决策问题,针对其指标数据信息不完整的特点,本文提出了基于改进正负靶心的灰靶评估模型。引入正靶心点距及投影值、负靶心点距及投影值、靶心系数、正负靶心距和综合靶心距等概念,实现桥梁耐久性的宏观和微观一体化分析,并将模型应用于甘肃省境内9座钢筋混凝土公路桥梁耐久性评估。结果表明:该9座桥梁的耐久性水平优劣从高到低排序为:桥梁6#、7#、4#、8#、1#、3#、2#、5#、9#,其中桥梁6#、7#的耐久性等级为Ⅱ级,桥梁1#、3#、4#和8#的耐久性等级为Ⅲ级,而桥梁2#、5#和9#的耐久性等级为Ⅳ级。通过指标敏感性分析,得出桥梁耐久性的绝对平均变化率随权重变化率绝对值增加呈线性增长趋势,而且指标权重与其敏感性有一定关系,即在指标权重变化率相同的情况下,指标权重越大,综合评价结果的平均变化率也越大。
中图分类号:
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