Resistance Models for Semi-Probabilistic Assessment of Historic Steel Bridges

Lenner, Roman; Ryjáček, Pavel; Sýkora, Milan

doi:10.2749/wroclaw.2020.1061

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…Nowadays, the undisputed favorite of all bridge builders in the world is steel, which has good mechanical properties under various operating conditions under load and is perfectly amenable to processing. It is carbon and low-alloy steels that are the most popular and cost-effective materials, widely used for the construction of small, medium and simply gigantic bridge structures of our time (Bazaras, Cesnavicius, Ilgakojyte-Bazariene, & Kersys, 2017;Lenner, Ryjacek, & Sýkora, 2020;Tkachenko, Tsegelnyk, Myntiuk, & Myntiuk, 2022).…”

Section: What Were the Main Reasons For The Destruction Of Metal Weld...mentioning

confidence: 99%

On the history of the construction of metal bridges in the 20th century using welding technology

Strelko

2023

Hist. sci. technol.

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The history of bridge construction is an important part of historical knowledge. Developments in bridge construction technology reflect not only engineering advances, but also social, economic and cultural aspects of society. Engineers and scientists faced unique challenges when designing and building bridges depending on the technological level of the era, available materials and the needs of society. This process may reflect technological progress, changes in transportation needs, and cultural and social changes. The purpose of this article is to briefly review key moments and stages in the history of metal bridge construction using welding technology in the 20th century. The history of the development of the construction of metal bridges using welding goes back a little over 100 years. The short period from the construction of the first welded bridges to their first disasters led to the need to analyze the possible causes of these destructions. As the analysis performed showed, catastrophic destruction most often occurred under the influence of several factors, as well as a combination of external adverse influences and the internal “unpreparedness” of the structure for them. The above examples indicate that an irrational choice of steel could be both an independent cause causing brittle failure of structures, and an aggravating factor in the presence of structural violations, thermal stresses and welding defects. Over the years, bridge manufacturing technologies have been improved in different countries, and new steels and materials for their welding have been developed. Thanks to the use of carbon, low-alloy and alloy steel, designers abandoned the brutal “railroad-type” beam trusses and today metal bridges with graceful and beautiful silhouettes powerfully stride across the water surface, mountains and valleys. They became real attractions of megacities and country landscapes, and builders were able to successfully solve numerous technical and economic problems. An important contribution to the development of global bridge construction using welding technologies was made by the team of the Institute of Electric Welding of the Academy of Sciences of the Ukrainian SSR under the leadership of Academician Evgeny Oskarovych Paton. The team of the Institute of Electric Welding of the Academy of Sciences of the Ukrainian SSR, introducing welding into bridge construction, carefully checked the results and monitored the behavior of structures. A new grade of steel was created that was resistant to the formation of brittle and fatigue cracks, its welding technology was developed, a technology for installation welding of vertical sheets with forced formation of a seam was developed, and suitable welding materials were selected. At the time of construction in 1953, the Kyiv Evgeny Paton Bridge across the Dnipro River was the largest all-welded bridge in Europe, all seams of which, including assembly ones, were made for the first time using automatic and semi-automatic welding. In addition, the presence of large similar blocks in the design of the Evgeny Paton Bridge made it possible to mechanize assembly and welding operations and organize an in-line method for their production at the factory and installation, which improved the quality of welding work and reduced its labor intensity.

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Section: What Were the Main Reasons For The Destruction Of Metal Weld...mentioning

confidence: 99%

On the history of the construction of metal bridges in the 20th century using welding technology

Strelko

2023

Hist. sci. technol.

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“…Extending the service life of existing steel bridges may be achieved by: -appropriate selection of target reliability level and assessment method; -obtaining data for a specific site or structure -this is beyond the scope of this study; see [1,2]. In general, lower reliability levels can be accepted for existing structures in comparison to structural design as follows from the general principles of structural reliability provided in ISO 2394:2015 [3] and prEN1990-2 [4]; see also [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Target Reliability Level on Partial Factors for Existing Steel Railway Bridges

Nadolski

Holický

Sýkora

2022

Construction Technologies and Architecture

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Many existing steel railway bridges, often recognized and protected for their heritage value, are exposed to degradation and increasing traffic loads and their reliability needs to be assessed. The key question is whether a particular bridge can be preserved, or needs to be strengthened or replaced. The main aspect in decision-making is specification of the target reliability. Development and wider use of the adjusted partial factor method seem to be reasonable to find the balance between demands on the input information, computational complexity, and improvements in reliability assessment. Adjusted partial factors are based on the relevant statistical parameters for basic variables and a selected target reliability index. In this contribution, the effect of the target reliability on updated partial factors are demonstrated. The case study illustrates that the target reliability levels recommended in various documents for new and existing structures are inconsistent in terms of the values and criteria according to which these values are to be selected. Consequently, the values of the partial factors for assessment may be significantly dissimilar.

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Methods for ensuring the sustainability of steel heritage bridges

Ryjáček,

Stančík,

Vůjtěch

et al. 2023

IABSE Congress, New Delhi 2023: Engineering for Sustainable Development

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<p>This paper describes the results of the NAKI II project of the “Methods for Achieving Sustainability of Industrial Heritage Steel Bridges” which has been carried out over the last 5 years. It deals with the diagnostics results presents the overview of the load tests done and assessment results, including the coating application. The strengthening methods are presented, with the focus on the SMA materials. It is shown, that we have still many hidden reserves in the load capacity of heritage bridges, and if proper methods are chosen, the durability can be much longer, then predicted 100 years.</p>

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Resistance Models for Semi-Probabilistic Assessment of Historic Steel Bridges

Cited by 4 publications

References 18 publications

On the history of the construction of metal bridges in the 20th century using welding technology

On the history of the construction of metal bridges in the 20th century using welding technology

Effect of Target Reliability Level on Partial Factors for Existing Steel Railway Bridges

Methods for ensuring the sustainability of steel heritage bridges

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