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通过分析桥梁施工过程力学性能的时效变化,考虑徐变、钢束松弛、混凝土强度等时效因素及结构性质的变异性,并引入模型综合修正系数及时效综合修正系数,建立了施工阶段结构挠度增量的计算模型;并利用Monte Carlo模拟方法,实现了施工阶段结构挠度增量的概率时效分析及预测。根据实际工程给出详细的计算算例,证明了方法的可行性和适用性,可供其他工程参考。
By analyzing the aging changes of mechanical properties during bridge construction, considering the creep, the relaxation of steel strands, the strength of concrete and other aging factors and the variability of the structural properties, the model comprehensive correction coefficient and the aging comprehensive correction coefficient are introduced to establish the structural deflection increase The Monte Carlo simulation method is used to realize the probabilistic aging analysis and prediction of the structural deflection increment in the construction stage. According to the actual project gives a detailed calculation example to prove the feasibility and applicability of the method for other projects for reference.