不明配筋梁的剩余疲劳寿命评估

Estimation of Surplus Fatigue Lifespan of Reinforced Concrete Bridge Beam with Unavailable Design Data

以曼纳线性损伤准则、分段线性解为基础,在综合考虑混凝土的碳化、钢筋锈蚀对钢筋混凝土梁疲劳损伤影响的前提下,运用分段线性解模型,模拟标准梁的疲劳损伤发展过程,提出钢筋应力系数发展的不利曲线,对不明配筋梁进行剩余疲劳寿命评估.

This paper is based on the MinerRule and the SegmentLinear Method.Taking into account the concrete carbonization and the steelbar corrosion,it simulates the fatigue development of the reinforced concrete bridge beam by means of the SegmentLinear method.Then it puts forward the most disadvantageous growth curve of the steelbar stress coefficient to evaluate the surplus fatigue lifespan of the reinforced concrete bridge beam whose design data is unavailable.