Retrofitting and Re-creation of Steel and Composite Bridges in Urban Areas by Considering Harmony of Safety, Environment and Economy

本研究的目的是提取城市地区建造的钢和复合桥梁在建立安全、周围环境和经济协调的情况下需要解决的问题，并为其开发应用技术解决方案。以下6个类别是为研究目标准备的。维修管理技术：为部分既有桥梁的维修准备了大型结构分析的输入数据，并对现有已开发的分析系统进行了改进，以进行大规模分析。此外，还研究了碳纤维板电防腐技术在现有钢结构中的适用性。合理、经济的桥梁改造技术：提出了某既有桥梁在交通荷载作用下的修复改造技术，并对这些技术在既有桥梁结构中的适用性进行了评价。更多的改进技术：开发了改进高架桥梁结构抗震性能的结构细节和装置，提出了桥梁结构抗震性能的评价方法。揭示了构建具有高抗震性能桥梁结构的关键因素。抗风技术改进：评估风对高架桥上的避雷杆等附加结构的影响。改善桥梁环境：提出了改善桥梁振动、噪声和景观的技术，并收集了目前桥梁振动、噪声和景观方面存在的问题作为参考。此外，还为制定桥梁及其相邻建筑物穿过地基的振动分析程序进行了基础调查。数据库系统建设：将上述5类的研究成果和参考文献汇总为数据库，并通过网站广泛开放。少

The purpose of this research is to extract problems which are required to establish a harmonized situation of safety, surrounding environment and economy on steel and composite bridges built in urban areas and to develop applied technical solutions for them. The following 6 categories are prepared for the research objectives.1.Maintenance management technology : The input data on the large-scale structural analysis for the maintenance of some existing bridges is prepared, and the existing analytical system already developed has been improved for such a large-scale analysis. Moreover, the applicability of an electric anti-corrosive technology using the carbon fiber sheet to an existing steel structure is investigated.2.Rational, economical bridge retrofitting technology : the repair and retrofit techniques for an existing bridge subjected to the traffic load service are proposed, and the applicability of these techniques to the existing bridge structure is evaluated.3.Earthquake resista … More nce improvement technology : The structural details and/or devices to improve the seismic performance of elevated bridge structures are developed and the evaluation method of seismic performance of the bridges structures is proposed. Also the key factors which are necessary for constructing the bridge structures with high seismic performance are revealed.4.Wind resistance technology improvement : Wind effects on additional structures like lightning poles build on elevated bridges is evaluated.5.Improvement of bridge environment : The improving techniques of bridge vibration, noise, and spectacle are proposed, and present problems concerning bridge vibration, noise, and spectacle are collected as references. Moreover, the basic investigation for developing the vibration analytical program for a bridge and its adjoining buildings through the soil foundation has been carried out.6.Construction of data base system : the research results and references, concerning the 5 categories mentioned above, are summarized as a database and are widely opened through the Web site for this research. Less