服役混凝土梁桥承载能力时变模型分析与应用

摘要

阐述分析了锈蚀钢筋与混凝土粘结性能、混凝土碳化衰减性能、混凝土抗压强度的时变性能、锈蚀钢筋力学性能及不同受力状况等对混凝土梁桥性能退化的影响.通过工程实际和研究,在已有资料的基础上,改进了服役钢筋混凝土梁桥承载能力模型.研究的理论基本上解决了服役混凝土梁桥的承载力评定和预测问题,为旧桥的可靠性评估奠定了基础.最后,通过工程实例的计算,具体说明了梁桥承载力验算的方法以及理论与实际 的符合情况.%The article reports on the effect of rusty steel and concrete binding properties , concrete carbonation attenuation performance, concrete compressive strength time-varying performance, corroded reinforced mechanical properties and the different stress in concrete girder bridge performance degradation. Based on existing data,the applying projects and researches have improved the bridge carrying capacity model of service concrete girder bridge. The research theory has solved the evaluation and prediction of service the bearing capacity of concrete girder bridge, which is the reliability evaluation of the the old bridge to laid a foundation. Finally, through the calculation of engineering examples, it illustrates the method of calculating the bearing capacity of the girder bridge and the correspondence between the theory and practical situation.