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首页> 外文期刊>Advances in Structural Engineering >Residual Fatigue Life Assessment of Damaged RC Bridge Slabs Based on Site-Inspection for Cracking: A Quantitative Discussion
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Residual Fatigue Life Assessment of Damaged RC Bridge Slabs Based on Site-Inspection for Cracking: A Quantitative Discussion

机译:基于开裂现场检查的钢筋混凝土桥梁板残余疲劳寿命评估:定量讨论

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摘要

There exist in-service RC bridge slabs suffering greatly from the fatigue loads of moving vehicles and serious cracking may often be observed. For quantitative assessment of residual fatigue life of bridge slabs under expected future loads, the past traffic loads' record is not available in most cases. Then, this paper aims to present pseudo-cracking approach to remaining fatigue life assessment of existing RC bridge slabs based on site crack inspection data alone. First, inspected crack width and its spacing are converted to the space-average strain field, on which finite element analysis can be carried out to predict the residual fatigue life of the cracked slabs. To prove the applicability of this simulation system proposed, parametric analysis is conducted to compute the S-N diagram of the damaged slabs and comparison is made with simplified deterioration grades specified in the manual of maintenance based upon experiences of bridge management. Furthermore, two bridge slabs in service with real crack inspection data were examined as a case study of application.
机译:在役的钢筋混凝土桥梁板受移动车辆疲劳载荷的严重影响,经常会观察到严重的开裂。为了对预期未来载荷下桥梁板的残余疲劳寿命进行定量评估,在大多数情况下都无法获得过去的交通载荷记录。然后,本文旨在仅根据现场裂缝检测数据提出一种拟裂方法,以评估现有RC桥梁板的剩余疲劳寿命。首先,将检查的裂纹宽度及其间距转换为空间平均应变场,然后在该场上进行有限元分析,以预测裂纹板的残余疲劳寿命。为了证明该仿真系统的适用性,根据桥梁管理经验,进行参数分析以计算受损平板的S-N图,并根据维护手册中指定的简化劣化等级进行比较。此外,还对两个实际裂缝检测数据在役的桥面板进行了检验,以作为应用案例研究。

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