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Title:Preostala uporabnost kovičenega železniškega mostu
Authors:ID Ule, Boris (Author)
ID Vojvodič-Gvardjančič, J. (Author)
ID Lovrečič-Saražin, M. (Author)
ID Banovec, J. (Author)
ID Kržič, F. (Author)
ID Beg, D. (Author)
ID Primec, Čedomir (Author)
Files:URL http://www.dlib.si/details/URN:NBN:SI:doc-NO15KTHA
 
Language:Slovenian
Work type:Not categorized
Typology:1.06 - Published Scientific Conference Contribution (invited lecture)
Organization:FS - Faculty of Mechanical Engineering
Abstract:Opisano je določevanje preostale uporabnosti kovičenega jeklenega železniškega mostu čez Dravo na Ptuju. Izračun temelji na metodah mehanike loma, na integraciji Parisove funkcije. Za začetno velikost napake vzamemo hipotetično razpoko, ki je skrita pod glavo kovice, kritično velikost razpoke pa določimo z merjenjem kritične vrednosti J-integrala ter z uporabo znane Sedlackekove odvisnosti J proti a, pri čemer je a velikost razpoke.
Keywords:mehanika loma, preostala uporabnost, utrujanje, kovičeni jekleni mostovi, jeklene konstrukcije, železne konstrukcije, železniški mostovi
Publisher:Inštitut za kovinske materiale in tehnologije
Year of publishing:1996
Number of pages:str. 455-462
Numbering:Letn. 30, št. 5
PID:20.500.12556/DKUM-53359 New window
UDC:625.1:624.014.2
ISSN on article:1318-0010
COBISS.SI-ID:2505750 New window
NUK URN:URN:SI:UM:DK:K5AGG7EV
Publication date in DKUM:10.07.2015
Views:1124
Downloads:66
Metadata:XML DC-XML DC-RDF
Categories:Misc.
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Record is a part of a journal

Title:Kovine zlitine tehnologije
Shortened title:Kovine zlit. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije
ISSN:1318-0010
COBISS.SI-ID:31742209 New window

Secondary language

Language:Unknown
Title:The residual service life of the riveted railway bridge
Abstract:The residual service life of the riveted railway bridge across the Drava river near Ptuj is described. The calculation is based on fracture mechanics concepts, on the integration of Paris function. The hypothetical crack hidden under the heat of the rivet was considered as initial flaw, whereas the critical crack size was determined by measuring the critical value of J-integral and J vs. a relationship proposed by Sedlacek, where a is the crack size. Specimens were made from a steel lamella from a diagonal brace and the crack propagation rate and the fracture toughness of the steel were measured. All the measurements were performed at room temperature and at -20°C. the Paris function with threshold stress intensity range ▫$K_{th}$▫ was measured whereas the ▫$J_{lc}$▫ integral was estimated on the basis of the known ▫$K_{lc}$▫ values. Some of the ▫$J_{lc}$▫ were measured directly too. The results are given as a number of cycles which can provoke a critical cracklengthening and are a reliable base for determining the frequency of detectoscopic inspections of vital elements of the bridge.
Keywords:riveted steel bridges, fatigue, residual service life, fracture mechanics, metal structures


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