旧桥承载潜力因素分析及实桥改造利用

The Factor Analysis of The Potential Bearing Capacity in old Bridges and Its Use in Existing Bridges

对旧桥可能存在的承载潜力因素：未意识到的连续性、约束性；组合作用；材料变异影响；荷载分布影响；桥面、栏杆、扶手的参与作用等进行了初步量化分析，给出了考虑权值的潜力因素综合影响系数，并反映在旧桥抗力效应中．研究成果通过室内模型试验和实桥的动、静载试验得到证实．在河北省的１０余座旧桥改造中加以利用，取得很高的经济效益．成果可做为旧桥改造提高承载能力的参考依据．

This article initially and quantity analyzes Serene potential bearing Capacity factors probably existing in old bridges, such as Unaware Continuity, restrictions, combining effects, material, Etc. The article provides the potential factors' comprehensive influencing coefficient in which every factors' weight value has been taken into account, and the coefficient has been expressed in the bridge resistance effect. The research result has been proved through indoor model tests and bridge dynamic-static load tests. It has been Used in over ten old bridge in the province of Hebei, and very high economic benefit has been achieved. Its result may become the reference basis of promoting old bridges' bearing Capacity.