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Illzach Bridge: Innovative Repair of Orthotropic Deck Using Ultra-High-Performance Fibre-Reinforced Concrete—Return After 5 Years
Structural Engineering International ( IF 1.1 ) Pub Date : 2019-08-27 , DOI: 10.1080/10168664.2019.1646109
Damien Champenoy 1 , Grégory Généreux 2 , Ziad Hajar 3 , Alain Simon 4 , Sébastien Fyon 5
Affiliation  

Abstract Built in 1970, the Illzach bridge is located near Mulhouse in eastern France. It is a single 106 m span bridge carrying two traffic lanes, with two lateral steel trusses and an orthotropic slab with transverse cross-beams. After the detection of numerous cracks in the deck welds in 2009, a repair solution, based on the replacement of the asphalt layer by a thin slab of ultra-high-performance fibre-reinforced concrete (UHPFRC), with local connection to the orthotropic steel deck, was adopted. The strengthening technique, called Orthodalle®, was designed as a result of the Orthoplus national research project (2007–2011) and the works were performed during summer 2011. After introducing the bridge and its problems, this paper presents the design, implementation, monitoring and tests of this innovative repair solution. In the following parts, the paper describes the numerous monitoring and testing operations conducted during the 5 years after the repair, and the calculations made for the bridge. The studies and monitoring show that using the UHPFRC slab to repair the orthotropic steel deck plate has stopped the cracking.

中文翻译:

Illzach 桥:使用超高性能纤维混凝土对正交异性桥面进行创新修复——5 年后返回

摘要 伊尔扎赫桥建于 1970 年,位于法国东部米卢斯附近。它是一座 106 m 的单桥,承载两条车道,有两个横向钢桁架和一个带有横梁的正交异性板。在 2009 年在甲板焊缝中检测到大量裂缝后,基于用超高性能纤维增强混凝土 (UHPFRC) 薄板替换沥青层并与正交异性钢局部连接的修复解决方案甲板,被采用。称为 Orthodalle® 的加固技术是 Orthoplus 国家研究项目(2007-2011 年)的结果,工程于 2011 年夏季进行。在介绍了桥梁及其问题后,本文介绍了设计、实施、监测并对这种创新的维修解决方案进行测试。在以下部分,该文件描述了修复后 5 年内进行的大量监测和测试操作,以及对桥梁的计算。研究和监测表明,使用UHPFRC板修复正交各向异性钢甲板已阻止开裂。
更新日期:2019-08-27
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