Lifecycle Analysis of Traffic Infrastructures using Accelerated Exposures Test Results

本研究获得了钢结构桥梁耐久性的基本数据，并利用这些数据进行了与全生命周期成本和全生命周期环境影响相关的全生命周期分析，建立了考虑现场环境的涂漆钢和基础隔震橡胶支座耐久性评价程序。首先，在S-6 JIS环境中使用加速暴露试验处理了重新涂漆钢的耐久性。采用a型、b型、c型、i型4种涂装体系进行复涂钢试件的长期加速暴露试验。为了验证试验数据的有效性，采用70年旧钢桥切割后重新涂漆的钢材进行了第二次加速暴露试验。建立了三种涂漆体系的劣化曲线，对桥梁的耐久性进行了评价。第三系列试验研究的目的是评价老化橡胶支座对单钢桥墩地震反应的影响因素。研究了老化与隔震橡胶支座长期性能的关系。然后将基础隔震橡胶支座的钢桥墩建模为两自由度体系，通过动力分析计算结构的响应和损伤。将橡胶支座替换为老化橡胶支座，并对墩台的抗震性能进行了评价。对橡胶支座老化的影响进行了比较和讨论。最后，根据钢桥墩的长期抗震性能，提出了基础隔震橡胶支座维修策略的确定方法。对既有桥梁和合理化桥梁进行了生命周期分析。对比现有桥梁类型，明确了考虑老化的全生命周期成本和全生命周期环境影响的特点。研究结果对桥梁综合管理体系的建立具有一定的参考价值。少

In this study the fundamental data of durability of steel bridges were obtained and the lifecycle analysis related to lifecycle cost and lifecycle environmental impact was done using them, The evaluation procedures of the durability of painted steels and base-isolated rubber bearing were established considering the site environment.Firstly the durability of re-painted steels was dealt with using the accelerated exposure test in the S-6 JIS environment. The re-painted steel specimens using four types of painting systems, i.e. A-type, B-type, C-type and I-type were applied to the long-term accelerated exposure test. In order to check the validity of the test data, the second series of accelerated exposure test was performed using the re-painted steels cut from the used steel bridge by 70 years. The deteriorated curves for three types of painting systems were established to evaluate the durability of the bridge.The purpose of third series of test study is to evaluate the influence factors … More of aged rubber bearings on the seismic response of single steel bridge piers. The relationship between ageing and base-isolated rubber bearings' long-term performance is studied. Then the steel bridge piers with base-isolated rubber bearing are modeled as two-degree of freedom systems, and through dynamic analysis the response and damage of the structures are calculated. The rubber bearing is replaced by an aged one and the seismic performance of the pier is evaluated. The influence of rubber bearing's ageing is compared and discussed. Finally, a procedure to determine the maintenance strategy of the base-isolated rubber bearing is proposed based on the long-term seismic performance of the steel bridge pier.The lifecycle analysis of existing types of bridges and rationalized bridges were performed. The characteristics of the lifecycle cost and lifecycle environmental impact considering the deterioration were clarified compared the existing types of bridges. These results will be very useful to establish the total management system of bridges. Less