Application of metal structures on highways
Abstract
The article discusses the main problems associated with the use of metal structures in road construction. The advantages of artificial structures made of metal in comparison with other materials due to their better physical and mechanical properties are given. The prospect of using metal corrugated pipes instead of ordinary reinforced concrete culverts and small single-span bridges is foreseen.
The article discusses the use of metal corrugated pipes. The first experience of using culverts made of metal corrugated structures begins at the end of the 19th century. The main countries in which metal culverts began to be used are given. In Ukraine, the use of metal corrugated pipes began in the early 2000s. The most famous manufacturer, which is the leader in the market of Ukraine and Europe, is the VIACON company.
The article analyzes the early experience of the operation of metal corrugated pipes and characterizes the main deformations and defects that most often occur during the operation of these pipes. In addition, the main causes of these deformations have been established.
The article provides a concise analysis and comparison of existing mathematical models for calculating the stability and stress-strain state of corrugated metal pipes. Mathematical models of Feldt, Yasevich, Levy, Marston, Spangler, Klein are considered. In addition, the article provides mathematical models of the American Association of State Highway and Transportation Officials (AASHTO) and CHBDC. Canada Highway and Bridge Design Code (CHBDC), as well as the calculation of metal corrugated pipes for strength and bearing capacity is performed in Ukraine. The analyzed models have their advantages and disadvantages. Each calculation method was improved by introducing coefficients and restrictions.
Summarizing the analysis of the existing models, the authors of the article propose to use the universal method of finite elements for the calculation of corrugated metal structures. This method of computer modeling allows taking into account a wide range of various parameters that are not always possible to use in calculations by conventional analytical methods.
In the final part of the article, the authors pay attention to the advantages of using metal corrugated pipes under highways in comparison with reinforced concrete ones, including economy, strength, seismic resistance, speed and manufacturability of installation.
It is expected that the further development of methods for calculating the stability of structures and the stress-strain state of corrugated metal pipes will allow to increase the percentage of the use of culverts made of corrugated metal under highways.
