Problems of lamella flanges in steel bridge construction

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00237804" target="_blank" >RIV/68407700:21110/15:00237804 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Problems of lamella flanges in steel bridge construction

Original language description

Abstract. Lamella flanges have lately grown very popular with the designers of steel bridges, because – in their belief - they provide us with the possibility of avoiding very thick flange plates in steel bridge structures. This belief is based on the assumption that the lamellas are perfectly plane and, therefore, in perfect contact everywhere, so that the loading from one lamella is transmitted into the other via pure compression, and that the perfect interaction of both lamellas is materialized by means of boundary fillet welds connecting both of the two lamellas. This simple assumption is, however, far from reality: it is not in the means of steel fabricators, not even in the means of those which are very progressively equipped, to produce perfectly plane flange lamellas. Then both lamellas exhibit unavoidable initial curvatures, which in combination form a gap between the lamellas, and consequently the directly loaded lamella are pressed into this gap. As the loading acting on every bridge is many times repeated, the aforesaid phenomenon is also many times repeated, (we can say that the lamellas „breathe“), and then an unavoidable cumulative damage process in the lamellas comes to being. The authors studied this phenomenon using several methods, the most important among them being probably an experiment conducted on a model simulating the situation connected with the lamella flanges of a real bridge in the neighbourhood of Prague. The results of this investigation will be described in the paper and thereby will demonstrate that the fatigue phenomenon accompanying the “breathing“ of the lamellas can considerably limit the lifetime of the structure.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

JM - Structural engineering

OECD FORD branch

—

Project

<a href="/en/project/TE01020168" target="_blank" >TE01020168: Centre for Effective and Sustainable Transport Infrastructure (CESTI)</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Engineering mechanics 2015

ISBN

978-80-86246-42-0

ISSN

1805-8248

e-ISSN

—

Number of pages

2

Pages from-to

164-165

Publisher name

Institute of Theoretical and Applied Mechanics Academy of Sciences of the Czech Republic

Place of publication

Prague

Event location

Svratka

Event date

May 11, 2015

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

—