旧桥承载潜力因素分析及实桥改造利用

对旧桥可能存在的7种承载潜力因素，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、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统，并反 映在旧桥抗力效应中，研究成果通过室模型试验和实桥的动、静载试验得到证实。在廊坊市的10余座旧桥改造中加以利用，取得很好的经济效益。

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

This article initially and quantitatively analyzes seven potential bearing capacity factors probably existing in old bridges, such as unaware continuity, restrictions, combining effect, deformative affection of materials etc. The article provides the comprehensive influencing coefficient of potential factors in which every weight value of factors 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 bridges in Langfang city and very high economic benefit has been achieved. Its result may become the reference basis for promoting the bearing capacity of old bridges.