基于近似概率的衬砌结构耐久性设计研究

与其他建筑结构一样,隧道衬砌结构会因环境因素的侵蚀而产生耐久性损伤,从而影响使用寿命,这种环境损伤作用在传统隧道衬砌结构设计方法中未定量考虑。采用基于近似概率的方法对衬砌结构进行耐久性设计,在设计过程中定量考虑环境侵蚀作用,使结果更符合实际要求。最后通过算例进行进一步说明。结果表明,采用该方法能够在一定程度上提高结构的耐久寿命,是可行的。

Study on durability design based on approximation probability In tunnel lining

Just as other structures,environmental effect perform an important role during the course of durability damages in tunnel lining,and it was not considered in traditional design method.In this paper,durability design method based on approximation probability was applied in tunnel lining,in which environmental effect was taken into account quantitatively.In the end,the course and example were given to explain the method.The result indicates that the method can improve the service life,and is feasible.