氯离子侵蚀环境下基于可靠性的混凝土结构耐久寿命预测

Durable life prediction of concrete structure based on the reliability under chloride environment

对氯离子侵蚀作用下基于可靠性的混凝土结构耐久寿命预测进行了研究。首先,确定氯离子环境作用下对应的性能水准和结构耐久性极限状态,然后,选择氯离子侵蚀深度模型和钢筋锈胀模型,以极限状态模式建立失效概率方程,在满足规定的失效概率条件下,确定结构的耐久性寿命,并给出不同性能水准的计算实例。结果表明,基于可靠性的混凝土结构耐久寿命预测方法与工程实例调查结果相一致,该方法可以有效地用于氯离子侵蚀环境下结构耐久寿命预测。

Durable life prediction of concrete structure under chloride environment is studied based on the reliability.Performance level and durability limit state are defined,corrosion depth model and steel corrosion spalling model is elected,and failure probability equation of ultimate state is established,durable life which satisfy the regulated failure probability is determined.The result show,durable life prediction method based on the reliability can correspond to the project example.The method can use the durable life prediction under chloride environment effectively.