Steel railway bridges as a legacy of high modernity - Foundations for a holistic decision making between repair and renewal

钢制铁路桥梁作为高度现代化的遗产 - 修复和更新之间整体决策的基础

• 批准号: 442249654
• 负责人: Professor Dr.-Ing. Werner Lorenz
• 金额: --
• 依托单位: Fachgebiet Bautechnikgeschichte
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/442249654?language=en
• 关键词: Steel; railway; bridges; legacy; modernity

The upgrade of Deutsche Bahn's rail network according to the growing demands of the "Verkehrswende" is the most important project of German infrastructure development in the coming decade. The modernization project also directly affects the still large number of steel railway bridges built since the end of the 19th century, which in the meantime have often reached their “nominal” lifespan. Particularly in the monument sector, the decision on renewal or repair and strengthening is usually made on the basis of comparative assessment matrices, which so far have almost exclusively been based on technical and economic criteria. Cultural or ecological criteria, on the other hand, are not taken into account or are at most included as a lump sum. On the one hand, there is a lack of reliable foundations for an appropriate consideration of the latter criteria; on the other hand, the quantitatively fixable evaluations in the technical and economic fields can hardly be compared with the more qualitative evaluations, especially in the field of building culture.Against this background, the project aims to provide the basis for a robust methodology for the holistic assessment of steel bridges, in which all four criteria mentioned are adequately and comparably taken into account. The focus is not on the evaluation of existing bridges, but on a central point in their use history - the decision to maintain or renew them at a certain stage. It is not the "product" construction that is at stake, but the process of making the decision between these basic options.For the dimensions of technology, economy, ecology and building culture, comparable evaluation keys are first developed, which are then combined in an overall evaluation system. The first focus is on the specification and elaboration of ecological and building culture criteria by extending existing evaluation approaches in terms of content and concept. A second focal point is the comparative formulation of an overall evaluation system that is as efficient as possible. Two variants will be developed for this, which can be tested, compared and sharpened in the third focus in case studies on bridge construction projects of DB Netz AG. The knowledge gained opens up the possibility of implementing a well-founded evaluation system and, building on this, appropriate action strategies in practical routines.The project is carried out in cooperation between the honorary professorship for Construction History at the BTU Cottbus-Senftenberg (Werner Lorenz) and the department of Environmentally Compatible Infrastructure Planning at the University of Wuppertal (Felix Huber).

根据“Verkehrswende”不断增长的需求对德国铁路网络进行升级是未来十年德国基础设施发展最重要的项目。现代化项目还直接影响到19世纪末以来建造的大量钢制铁路桥梁，而这些桥梁此时往往已经达到了“名义”寿命。特别是在古迹领域，更新或修复和加固的决定通常是在比较评估矩阵的基础上做出的，迄今为止，这些矩阵几乎完全基于技术和经济标准。另一方面，文化或生态标准则没有被考虑在内，或者最多只是一次性包含在内。一方面，缺乏可靠的基础来适当考虑后一个标准；另一方面，技术和经济领域的定量评估很难与更定性的评估相比，特别是在建筑文化领域。在此背景下，该项目旨在为钢桥的整体评估提供可靠的方法论基础，其中提到的所有四个标准都得到充分和可比较的考虑。重点不是对现有桥梁的评估，而是其使用历史的一个中心点——在某个阶段维护或更新它们的决定。关键的不是“产品”的构建，而是在这些基本选项之间做出决策的过程。针对技术、经济、生态和建筑文化维度，首先制定可比较的评价标准，然后将其组合成一个总体评价体系。第一个重点是通过在内容和理念上扩展现有评估方法，对生态和建筑文化标准进行规范和细化。第二个重点是尽可能有效地比较制定总体评价体系。为此将开发两种变体，可以在 DB Netz AG 桥梁建设项目案例研究的第三个焦点中进行测试、比较和强化。所获得的知识为实施基础良好的评估系统提供了可能性，并在此基础上在实际中制定适当的行动策略。该项目是由 BTU 科特布斯-森夫滕贝格建筑史名誉教授（Werner Lorenz）和伍珀塔尔大学环境兼容基础设施规划系（Felix Huber）合作开展的。