TY - JOUR A2 - Hong, Haoyuan AU - Hu, Sicong AU - Wang, Zheyan AU - Guo, Yu AU - Xiao,Gui PY - 2021 DA - 2021/06/14 TI -生命周期地震脆弱性评估现有的钢筋混凝土桥梁受到Chloride-Induced在海洋环境腐蚀SP - 9640521六世- 2021 AB -桥梁在海洋环境已经遭受氯攻击很长一段时间。由于不同截面的桥墩暴露在不同的条件下,氯化物腐蚀不仅会影响桥墩腐蚀过程的规模,而且随着时间的推移会显著改变桥墩的损伤扩展机制和地震损伤分布。为了研究海洋环境中既有混凝土桥梁在空间氯化物诱导腐蚀下的地震损伤,采用Duracrete模型确定了钢筋在不同暴露条件下的腐蚀起始时间以及钢筋、约束混凝土、混凝土的退化模型。在前人研究的基础上,得到了无约束混凝土。根据地震易损性评估方法,提出了既有混凝土桥梁在空间氯化物腐蚀下的损伤评估方法。此外,以两种不同水域的桥梁为例,研究了空间氯化物腐蚀对桥墩及其他构件地震损伤的影响。结果表明,空间氯化物腐蚀会导致低水位段比相邻段更加脆弱,并改变桥墩的震害分布。桥墩的腐蚀会增加桥墩本身的地震破坏概率,而会降低其他构件的地震破坏概率。此外,桥墩震害分布的改变会放大震害效应。 Due to the fact that the spatial chloride-induced corrosion of piers may alter the yield sequence of cross section, it then affects the seismic performance assessment of piers. A method to determine the evolution probability of yield sequence of corroded piers is proposed at last. From the result, the evolution probability of yield sequence of piers in longitudinal direction depends on the relationship between the height of piers and submerged zone. Moreover, the height of piers, submerged zone, and tidal zone have a common influence on the evolution of yield sequence of piers in transversal direction. SN - 1687-8086 UR - https://doi.org/10.1155/2021/9640521 DO - 10.1155/2021/9640521 JF - Advances in Civil Engineering PB - Hindawi KW - ER -