既有石板拱桥的评估及鉴定方法研究

为了有效提高石拱桥状况评价的准确性,提出针对石拱桥承载能力详细的评估和鉴定计算方法。考虑石板拱桥拱上建筑联合作用、桥梁破损特点及实际运营荷载,对如何建立较为符合实际的桥梁计算模型进行了研究;建立了针对石拱桥的技术状况评估模型,对桥梁各评估元素的初始权重及技术状况评价标准进行初步研究;根据各评估元素状态对其元素权重加以修正并综合确定承载能力检算系数Z1。最后,以实际桥梁工程为背景,给出了计算实例,结果表明本文方法具有较好的工程实用性。

Research on Evaluation and Appraisal Method of Existing Stone Slab Arch Bridge

In order to improve the veracity in evaluation of slab arch bridge,a detailed method,which is for the assessment and check-computation aim at slab arch bridge,was put forward.Based on analysis of the combined action of the upper construction on arch,the damage features about stone slab arch bridge and the practice operation load,particular attention was paid on the research of how to format calculation model that can be more truthful.Another emphasis was laid on the establishment of a technology status evaluation model aiming at stone slab arch bridge and the research on the initial weights and evaluation criteria about the evaluation elements of stone slab arch bridges.According to the conditions of evaluation elements,the initial weights were modified and the check-computation coefficient of load-bearing capacity was confirmed.At last,based on true bridge engineering,a practical calculation example was presented.The evaluation result demonstrates the validity of this method.