Causes of the Morandi viaduct disaster in Genoa as a contribution to the design of pre-stressed structures

IF 0.5 Q4 CONSTRUCTION & BUILDING TECHNOLOGY

Roads and Bridges-Drogi i Mosty Pub Date : 2020-03-31 DOI:10.7409//RABDIM.020.001

J. Rymsza

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引用次数: 1

Abstract

The article analyses the causes of the Morandi viaduct disaster in Genoa. This three-span viaduct was a part of the A10 motorway leading to Savona. The structure of the viaduct supports was unusual. A pylon to each of the frame support was added and cantilevers to each pylon by means of a pair of suspended cables. The construction of the cable used was also atypical. The concreted cable had a rectangular cross-section and was a steel and concrete composite element. The concrete in this element was compressed with steel tendons so that it could transfer the tensile forces generated by the traffic load. The durability of the concreted cable subjected to tension was low. The article provides information on the technical condition of the viaduct and the way of strengthening the cables in the early 1990s. At that time, the author of the article visited this structure. He had a different concept of reinforcement than the one that was implemented. In August 2018, the viaduct disaster occurred, as a result of which one of the structure supports collapsed, and in June 2019, during the demolition process, the other two supports were blown up. Since in Venezuela and Libya there are still two more bridges with a structure similar to that in Italy, the concept of reinforcing them, as proposed by the author of the article 25 years ago, may still be useful.

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热那亚莫兰迪高架桥灾难的原因，对预应力结构设计的贡献

本文分析了热那亚莫兰迪高架桥事故的原因。这座三跨高架桥是通往萨沃纳的A10高速公路的一部分。高架桥的支撑结构很不寻常。在每个框架支撑上都增加了一个塔，并通过一对悬挂的电缆将每个塔悬挑起来。所用电缆的结构也很不典型。混凝土电缆具有矩形截面，是一种钢和混凝土组合单元。该构件中的混凝土被钢筋压缩，这样它就可以传递由交通荷载产生的拉力。混凝土拉索受拉耐久性较低。本文介绍了90年代初高架桥的技术状况和钢索加固方法。当时，文章的作者参观了这个结构。他对强化的概念不同于他所执行的概念。2018年8月，高架桥发生灾难，其中一个结构支撑倒塌，2019年6月，在拆除过程中，另外两个支撑被炸毁。由于在委内瑞拉和利比亚还有另外两座桥梁的结构与意大利类似，该条作者在25年前提出的加强它们的概念可能仍然有用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Roads and Bridges-Drogi i Mosty CONSTRUCTION & BUILDING TECHNOLOGY-

CiteScore

1.20

自引率

0.00%

发文量

期刊介绍： The quarterly journal Roads and Bridges – Drogi i Mosty is published by the Road and Bridge Research Institute since September 2012 as a bilingual English-Polish journal. From 2002 to 2012 the journal was printed under the title Drogi i Mosty. The journal mission is to promote current achievements in science and technology in the field of road and bridge engineering. The journal is intended as a forum of the exchange of innovative concepts and solutions between the researches from different countries. Original scientific and technical papers in the field of civil engineering and related engineering sciences are published. The scope of Roads and Bridges – Drogi i Mosty includes design, construction, maintenance and safe use of roads, bridges, airports and other transportation structures.