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

本研究的目的是提炼出建立城市钢结构桥梁安全、周边环境与经济协调发展所需要的问题，并针对这些问题提出实用的技术解决方案。为研究对象准备了以下6类内容：1.养护管理技术：编制了部分既有桥梁养护大型结构分析的输入数据，并对已开发的现有分析系统进行了改进，以适应如此大规模的分析。2.合理、经济的桥梁加固技术：提出了既有桥梁在交通荷载作用下的修复和加固技术，并对这些技术在既有桥梁结构中的适用性进行了评估。3.抗震…更多的改进技术：发展了改善高架桥梁结构抗震性能的结构细节和/或装置，并提出了桥梁结构抗震性能的评估方法。4.抗风技术改进：评估风对架空桥梁上设置的避雷针等附加结构的影响。5.桥梁环境的改善：提出了桥梁振动、噪声和景观的改进技术，并收集了目前桥梁振动、噪声和景观方面的问题作为参考。6.数据库系统的构建：将上述5类研究成果和参考文献汇总为数据库，并通过本研究的网站广泛开放。较少

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