人行天桥技术状况评价模型研究

Study on Evaluation Model of Technical Condition of Pedestrian Overpass

人行天桥作为一种重要的道路基础设施,正在越来越多地被使用。现有桥梁评价模型的研究均集中在普通车行桥梁,缺乏对人行天桥评价模型的研究。现通过对上海市五十多座人行天桥的现场调研,并对人行天桥和普通车行桥梁的构件划分做了详细的对比,然后确定了人行天桥的构件划分。人行天桥主要是供行人通过的,因此确定人行天桥的损坏类型时,人行天桥的抗滑性能不容忽视。通过将现有的对普通车行桥梁的评价模型应用于上海市五十多座人行天桥后发现,现有针对普通车行桥梁的各种评价方法在处理多墩或多跨结构时存在着一定的弊端。通过现场评分实验与分析-标定法相结合确定了适合人行天桥多墩或多跨的计算方法,并确定了人行天桥各部位的权重。以上海市区一座典型的人行天桥为例,用本文的人行天桥技术状况评价模型,对其进行技术状况评定。

As an important road infrastructure, the pedestrian overpass is increasingly being used. The present study of bridge evaluation model focuses on the ordinary driving bridge. There is short of the study on the evaluation model of pedestrian overpass. According to the field survey of more than 50 pedestrian overpasses in Shanghai, the article compares the component division of pedestrian overpass and ordinary driving bridge, and defines the component division of pedestrian overpass. The pedestrian overpass is mainly for pedestrians. Therefore, the anti-slide performance of pedestrian overpass cannot be overlooked during determining the damage type of pedestrian overpass. After using the existing evaluation model of bridge to more than 50 pedestrian overpasses in Shanghai, the article finds that there are some disadvantages of various evaluation methods especially for the ordinary driving bridge to handle the multi-span and multi-pier structures. The field grading experiment combined with the analysis – calibration method can determine the calculation method suitable for the multi-span or multi-pier pedestrian overpass, and determine the weight of each position of pedestrian overpass. Taking a typical pedestrian overpass of Shanghai as an example, the article evaluates its technical condition by the above evaluation model.