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中文摘要：
给出锈蚀钢筋混凝土梁受弯承载力的计算模型，模型综合考虑锈蚀钢筋混凝土梁中材料性能的退化和钢筋与混凝土黏结性能的退化，根据梁截面平衡方程和钢筋与混凝土的变形协调方程建立梁中受拉钢筋轴力微分方程，给出了微分方程的滑移边界条件和钢筋轴力连续边界条件，定义梁弯曲破坏的两种极限状态：混凝土压碎和钢筋屈服。通过国内外试验数据，对本模型进行验证，模型计算结果与试验结果吻合很好。最后，将受拉纵筋直径、受拉纵筋屈服强度、保护层厚度和混凝土受压强度四种参数对梁受弯承载力的影响进行分析。
英文摘要：
Considering degradation of the rebar, concrete and bond between the rebar and concrete of corrosion-damaged RC beams, the differential equation for the axial force of the longitudinal bar was established according to the equilibrium of beam section and the deformation compatibility of the rebar and concrete. The bond-slip boundary condition and the rebar axial force continuity boundary condition were formulated. Two types of limit states of bending failure, including both concrete crush and rebar yield, were defined. The model was verified by experimental data from both China and abroad. The influences of the diameter and yield strength of the longitudinal rebar, the thickness of concrete cover and the concrete compression strength on the flexural capacity of RC beams were analyzed.
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同项目期刊论文
Field inspection on chloride ion-intrusion effect of seawater in dry-wet cycling zone of concrete st
Determination and application of the sharp degradation point of concrete under environmental actions
Spatial variability-based corrosion risk assessment and strategy of repair and maintenance for RC st
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