Long-term seismic performance of RC structures in an aggressive environment: emphasis on bridge piers
Long-term seismic performance of RC structures in an aggressive environment: emphasis on bridge piers
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DOI：
10.1080/15732479.2012.761246
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发表时间：
2014-01-01
影响因子：
3.7
通讯作者：
Frangopol, Dan M.
中科院分区：
文献类型：
--
作者：
Akiyama, Mitsuyoshi;Frangopol, Dan M.
尽管已经开发了精确的结构模型，腐蚀结构的性能受到单调的弯曲和/或剪切，包括腐蚀损伤的抗震性能的研究很少。对于腐蚀性环境和地震多发地区的结构寿命评估，需要考虑腐蚀对抗震性能的影响。地震需求取决于地震危险性评估的结果，而地震能力的恶化则取决于环境危险性评估。本文主要研究锈蚀钢筋混凝土结构在地震作用下的全寿命可靠度分析问题。它包括（a）腐蚀钢筋混凝土构件的抗震能力的估计;（B）地震和空气中氯化物危害评估和（c）腐蚀损坏桥梁的生命周期抗震可靠性。特别是，本文介绍了可视化的腐蚀过程中，钢筋混凝土构件使用X射线建模钢筋腐蚀的空间变异性。提出了一种新的计算方法，将与气载氯化物相关的概率危害纳入桥墩的寿命周期地震可靠度。
Even though accurate structural models have been developed for the performance of corroded structures subjected to monotonic flexure and/or shear, studies on seismic performance that include corrosion damage are scarce. For the lifetime assessment of structures in aggressive environments and earthquake-prone regions, the effects of corrosion on seismic performance need to be taken into consideration. Whereas the seismic demand depends on the results of seismic hazard assessment, the deterioration of seismic capacity depends on the environmental hazard assessment. The analysis of the life-cycle reliability of corroded reinforced concrete (RC) structures under earthquake excitations is the topic of this paper. It includes (a) estimation of the seismic capacity of corroded RC components; (b) seismic and airborne chloride hazard assessment and (c) life-cycle seismic reliability of bridges with corrosion damage. In particular, this paper introduces the visualisation of corrosion process in RC members using X-ray for modelling the spatial variability of rebar corrosion. A novel computational procedure to integrate the probabilistic hazard associated with airborne chlorides into life-cycle seismic reliability of bridge piers is presented.