Quantitative Evaluation of Risk Factors Affecting the Deterioration of RC Deck Slab Components in East Japan and Tokyo Regions Using Survival Analysis
Quantitative Evaluation of Risk Factors Affecting the Deterioration of RC Deck Slab Components in East Japan and Tokyo Regions Using Survival Analysis
复制标题
利用生存分析对影响东日本和东京地区 RC 楼板构件劣化的风险因素进行定量评估
DOI：
10.3390/app8091470
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Takahiro Yamazaki
中科院分区：
文献类型：
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作者：
Jie Fang;T. Ishida;Takahiro Yamazaki
在本文中所描述的调查的目的是确定的因素在钢筋混凝土（RC）桥面板组件的恶化，定量评估它们使用生存分析，从而促进最佳决策。考虑到日本各地的桥梁退化，从东日本和东京地区的桥梁检测数据选择不同的退化现象和过程的基础上。进行数据清理和选择，以提高分析的准确性和可靠性。采用Kaplan-Meier（KM）估计和考克斯多变量回归模型，定量估计各变量的危险度。在东日本，冬季降水和除冰盐大大增加了恶化率，表明高湿度和高盐度环境是恶化的主要原因。然而，对于东京地区，交通负荷导致高风险，表明疲劳破坏是主要的风险因素。在这两个领域，板边缘表现出高劣化率，因此，边缘防水应加以改善，以提高耐久性。此外，使用地理坐标信息计算并绘制了每个桥梁组件的风险评分。使用这些信息可以更有效地进行检查、维修和修复。
The investigation described in this paper aims to determine the factors in the deterioration of reinforced concrete (RC) bridge deck slab components, quantitatively evaluate them using survival analysis, and thus facilitate optimal decision-making. To consider bridge deterioration across Japan, bridge inspection data from the East Japan and Tokyo regions were selected based on their different deterioration phenomena and processes. Data cleaning and selection were conducted to increase the accuracy and reliability of the analysis. Using the Kaplan–Meier (KM) estimator and Cox multivariate regression model, the hazard risk of each variate was quantitatively estimated. For East Japan, winter precipitation and de-icing salt greatly increased the deterioration rate, indicating that high humidity and a high salinity environment were the main reasons for deterioration. However, for the Tokyo region, traffic loading resulted in high risk, indicating that fatigue failure was the main risk factor. In both areas, the slab edge showed a high deterioration rate; therefore, edge waterproofing should be improved to enhance durability. Additionally, the risk score of each bridge component was calculated and mapped using geographical coordinate information. Inspection, repairs, and rehabilitation can be more efficiently conducted using this information.
DOI：
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发表时间：
1972
期刊：
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影响因子：
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作者：
D. Cox
通讯作者：
D. Cox