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考虑钢筋及混凝土材料的疲劳损伤累积效应,采用时变本构模型,通过对河北省代表性高速公路的交通量统计,建立疲劳车模型,在此基础上进行有限元分析及数值模拟,对某钢筋混凝土梁进行了疲劳寿命评估。结果表明,在正常使用情况下,河北省高速公路桥梁在设计使用寿命100年内不会出现疲劳破坏。
Considering the cumulative effect of fatigue damage on steel bars and concrete materials, a time-varying constitutive model was adopted. Based on the traffic statistics of representative expressways in Hebei Province, fatigue model was established. Based on this, finite element analysis and numerical simulation were performed. Reinforced concrete beam fatigue life assessment. The results show that in normal use, the highway bridge in Hebei Province will not fatigue damage within 100 years of its design life.