scholarly journals Crack-Detection in old riveted steel bridge structures

2019 ◽  
Vol 17 ◽  
pp. 339-346 ◽  
Author(s):  
Lars Sieber ◽  
Ralf Urbanek ◽  
Jürgen Bär
Keyword(s):  
Crack Detection ◽  
Steel Bridge ◽  
Bridge Structures

scholarly journals Review of annual progress of bridge engineering in 2019

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Renda Zhao ◽  
Yuan Yuan ◽  
Xing Wei ◽  
Ruili Shen ◽  
Kaifeng Zheng ◽  
...  
Keyword(s):  
High Performance ◽  
Concrete Bridges ◽  
Bridge Engineering ◽  
Research Progress ◽  
Steel Bridge ◽  
Wind Resistance ◽  
Main Research ◽  
Bridge Model ◽  
Bridge Evaluation ◽  
Bridge Structures

AbstractBridge construction is one of the cores of traffic infrastructure construction. To better develop relevant bridge science, this paper introduces the main research progress in China and abroad in 2019 from 13 aspects, including concrete bridges and the high-performance materials, the latest research on steel-concrete composite girders, advances in box girder and cable-supported bridge analysis theories, advance in steel bridges, the theory of bridge evaluation and reinforcement, bridge model tests and new testing techniques, steel bridge fatigue, wind resistance of bridges, vehicle-bridge interactions, progress in seismic design of bridges, bridge hydrodynamics, bridge informatization and intelligent bridge and prefabricated concrete bridge structures.

scholarly journals Effects of Surrounding Earth on Shell During the Construction of Flexible Bridge Structures

2019 ◽  
Vol 41 (2) ◽  
pp. 67-73
Author(s):  
Czesław Machelski
Keyword(s):  
Steel Structure ◽  
Steel Structures ◽  
Static Condition ◽  
Steel Bridge ◽  
Interfacial Interactions ◽  
Soil Medium ◽  
Bridge Structures ◽  
Internal Forces ◽  
Bearing Loads ◽  
Corrugated Plates

AbstractA characteristic feature of soil-steel structures is that, unlike in typical bridges, the backfill and the carriageway pavement with its foundation play a major role in bearing loads. In the soil-steel structure model, one can distinguish two structural subsystems: the shell made of corrugated plates and the backfill with the pavement layers. The interactions between the subsystems are modelled as interfacial interactions, that is, forces normal and tangent to the surface of the shell. This is a static condition of the consistency of mutual interactions between the surrounding earth and the shell, considering that slip can arise at the interface between the subsystems. This paper presents an algorithm for determining the internal forces in the shell on the basis of the unit strains in the corrugated plates, and subsequently, the interfacial interactions. The effects of loads arising during the construction of a soil-steel bridge when, for example, construction machines drive over the structure, are taken into account in the analysis of the internal forces in the shell and in the surrounding earth. During construction, the forces in the shell are usually many times greater than the ones generated by service loads. Thus, the analytical results presented in this paper provide the basis for predicting the behaviour of the soil medium under operational loads.

scholarly journals Development of a Structural Integrity Non-destructive Inspection System for Bridges Made of Weathering Steel

2019 ◽  
Vol 278 ◽  
pp. 03006
Author(s):  
Björn Torsten Salmen ◽  
Marina Knyazeva ◽  
Frank Walther
Keyword(s):  
Structural Steel ◽  
Crack Detection ◽  
Structural Integrity ◽  
Test Methods ◽  
Point Of View ◽  
Inspection System ◽  
Weathering Steel ◽  
Steel Bridge ◽  
Electro Magnetic ◽  
Non Destructive

Due to the increasing volume of traffic, bridges are exposed to higher loads as it was considered during the planning phase. Therefore, a regular inspection is necessary in order to detect cracks at very early stages. The use of weathering structural steel in bridges, as well as in composite bridge constructions is an alternative to conventional bridges, not only from an economic but also from an ecological point of view, since it is not necessary to apply a corrosion protection layer and renew it during the lifetime of the bridge. Unfortunately, conventional visual inspection or magnetic particle inspection on the weathering steel bridge are hindered by the protective patina and requires development of new test methods. Within the framework of this project, a combined crack detection technique using non-destructive inspection by means of Active Thermography and by Electro-Magnetic Acoustic Transducer (EMAT) were evaluated in laboratory environments and in real conditions on bridge structures made of weathering structural steel.

CROSSINGS FOR ANIMALS – AN EFFECTIVE METHOD OF WILD FAUNA CONSERVATION GYVŪNŲ PERĖJOS – EFEKTYVUS FAUNOS APSAUGOS METODAS / ПЕРЕХОД ДЛЯ ЖИВОТНЫХ – ЭФФЕКТИВНЫЙ МЕТОД ОХРАНЫ ФАУНЫ

2012 ◽  
Vol 20 (1) ◽  
pp. 86-96 ◽  
Author(s):  
Damian Beben
Keyword(s):  
Natura 2000 ◽  
Steel Bridge ◽  
The European Union ◽  
Engineering Structures ◽  
The Road ◽  
Wild Fauna ◽  
Bridge Structures ◽  
Road Systems ◽  
On The Road ◽  
Corrugated Plates

The paper characterizes the problem of preservation of wildlife animals in connection with extension of transportation road systems. The constantly evolving transportation infrastructure in Europe, especially in its Midwestern part, on one hand connects, making it easier for people to travel and ship goods, but on the other hand it irreversibly divides and leaves a painful impress on virgin natural areas (fragmentation of the environment). The paper briefly presents the European Ecological Network Nature 2000 as the European Union program concerning the environmental protection. It enumerates possible types of animal crossings together with their characteristics. Some examples of underpasses, overpasses and crossings on the road surface are also presented. It also presents specificity and phases of designing engineering structures of this type, as well as the most common design errors and their influence over the use of such structures by animals. Finally the soil-steel bridge structures made from corrugated plates are characterized in their function as crossings for animals. The conclusion mentions complexity of the problem of animal crossing construction, which can be of use to designers and constructors of this type of engineering structures. Santrauka Straipsnyje apžvelgtos laukinės gyvūnijos išsaugojimo problemos, susijusios su besiplečiančiu transporto tinklu. Nuolat besivystanti transporto infrastruktūra Europoje, ypač Vidurio vakaruose, viena vertus, jungia ir palengvina žmonių mobilumą,sukuria jungtį su uostais, tačiau, kita vertus, daro didelę žalą natūraliai aplinkai (aplinkos fragmentacija). Straipsnyje trumpai pristatoma Europos ekologinio tinklo ,,Natura 2000“ ES programa, skirta aplinkos apsaugai. Išvardyti galimi gyvūnų perėjų tipai su jiems būdingomis charakteristikomis. Pateikiami požeminių, virš kelio ir perėjų per patį kelią pavyzdžiai. Straipsnyje taip pat apžvelgiama inžinerinių struktūrų projektavimo specifika ir fazės, aptariamos dažniausiai pasitaikančios projektavimo klaidos ir jų įtaka gyvūnams. Galiausiai apibūdinamas dirvos ir plieninių tiltų struktūros, pagamintos iš gofruotų plokštelių, naudojimas gyvūnų perėjoms. Išvadose aptariamas gyvūnų perėjų konstrukcijų problemų kompleksiškumas, į kurį turėtų atkreipti dėmesį gyvūnų perėjas konstruojantys inžinieriai ir dizaineriai. Резюме Анализируются проблемы охраны диких животных в связи с расширяющейся транспортной сетью. Постоянно развивающаяся транспортная инфраструктура в Европе, особенно на западе центральной части Европы, с одной стороны, объединяет людей, облегчает их мобильность, открывает доступ к портам, с другой – наносит непоправимый вред натуральной природе. В статье вкратце представлена программа Европейской экологической сети – Natura 2000, касающаяся охраны окружающей среды. Перечислены возможные типы переходов для животных с их типичными характеристиками. Представлены примеры подземных переходов, переходов над дорогой и по самой дороге. Проанализирована специфика и фазы проектирования инженерных структур, а также часто совершаемых ошибок при проектировании и их влияние на животных. Охарактеризовано применение для переходов животных почвенностальных структур мостов из гофрированных пластин. Проанализирована комплексность проблем, касающихся конструкций для переходов животных, на которые следует обратить внимание инженерам и дизайнерам при констру ировании переходов для животных.

A PERFORMANCE-BASED SEISMIC DESIGN METHODOLOGY FOR STEEL BRIDGE SYSTEMS

2009 ◽  
Vol 03 (03) ◽  
pp. 175-193 ◽  
Author(s):  
TSUTOMU USAMI ◽  
HANBIN GE
Keyword(s):  
Seismic Design ◽  
Design Methodology ◽  
Evaluation Method ◽  
Ultimate Strain ◽  
Steel Bridge ◽  
Performance Matrix ◽  
Bridge Structures ◽  
Performance Based Seismic Design ◽  
Displacement Based ◽  
A Performance

This paper outlines a performance-based seismic design methodology for steel bridge systems. Two kinds of menus are proposed. The first is the displacement-based evaluation method which compares the response displacement with the ultimate displacement, and the second is the strain-based evaluation method which compares the response strain and the ultimate strain. Moreover, the seismic required performance matrix for bridge structures and soundness matrix for members are presented and discussed.

scholarly journals ANALYSIS AND DESIGN OF STEEL BRIDGE STRUCTURES WITH ENERGY ABSORPTION MEMBERS

2008 ◽  
pp. 173-183
Author(s):  
Zhiyi Chen ◽  
◽  
Hanbin Ge ◽  
Tsutomu Usami ◽  
◽  
...  
Keyword(s):  
Energy Absorption ◽  
Steel Bridge ◽  
Analysis And Design ◽  
Bridge Structures

CORROSION BEHAVIOR OF FRICTION PLATE SURFACES CONNECTED BY HIGH-STRENGTH BOLTS

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
S. Yamashita ◽  
T. Shimozato ◽  
Y. Arizumi ◽  
M. Tai ◽  
T. Yabuki
Keyword(s):  
Corrosion Behavior ◽  
High Strength ◽  
Steel Bridge ◽  
Average Roughness ◽  
Arithmetic Average ◽  
Bridge Structures ◽  
Friction Plate ◽  
Girder Bridge ◽  
Corrosive Environments ◽  
Friction Surfaces

The aim of this study is to examine the corrosion behavior of friction plate surfaces connected by high-strength bolts under severely corrosive environments in steel bridge structures. The corrosion behavior was inspected using corroded specimens cut from a steel girder bridge that collapsed after severe corrosion for 28 years. Visual inspection and measurement of the corrosion thicknesses of the inner surfaces were performed. The arithmetic average roughness was also measured to evaluate the friction coefficient. From these investigations, it may be clear that the aging deterioration of the friction surfaces of joint plates connected by high-strength bolts is has little influence over the slip strength. The details of conducting investigations and their results are presented in this paper.

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