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在英国建于20世纪60年代和70年代设计寿命为120年的公路桥梁中,许多桥梁仅在运营20～40年后就出现损坏迹象。为保证结构全寿命周期成本最小,在土木工程结构的设计、施工和寿命期内的维护方面必须考虑结构的可持续性。为促进桥梁的可持续性发展,英国高校与行业内相关公司开展了一系列研究:不同形式的桥梁施工、维护、修理和更换策略对可持续性的影响;利用先进的现场检测设备对混凝土的长期耐久性进行评估;开发先进的、具有强大生命力的桥梁结构设计方案;提出一种新型的、“确实不需要维护”的柔性混凝土拱形体系。介绍各研究项目中的主要成果,以供参考。
Among the bridges and bridges built in the UK in the 1960s and 1970s with a design life of 120 years, many bridges show signs of damage only after 20 to 40 years of operation. In order to minimize the lifetime cost of the structure, the structural sustainability must be considered in the design, construction and maintenance of the civil engineering structure. In order to promote the sustainable development of bridges, a series of researches have been carried out by British universities and related companies in the industry: the sustainability of different forms of bridge construction, maintenance, repair and replacement strategies; the use of advanced on-site testing equipment for concrete Long-term durability assessment; the development of advanced, with strong vitality of the bridge structure design; proposed a new type of “do not need to maintain” flexible concrete arch system. Introduce the main achievements of each research project for reference.