Experimental measurement of the anchorage length of interrupted prestressing reinforcement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F22%3APU145467" target="_blank" >RIV/00216305:26110/22:PU145467 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Experimental measurement of the anchorage length of interrupted prestressing reinforcement

Popis výsledku v původním jazyce

This paper focuses on the current problems of breakage of prestressing reinforcement (mostly caused by corrosion) of prestressed precast bridge girders from 1960-1990 and its influence on the residual load-bearing capacity. Actual prestressed precast girders (I-73 structural type), which were developed in 1973 and which were in service from 1979 and 1980, were obtained for the purposes of experimental testing. Researchers from Brno University of Technology designed unique experiments on these girders to determine the actual anchor length of a fully grouted prestressing cable made of 4.5 mm patented wires. Semi-destructive probes were drilled along the length of the prestressing rein-forcement up to the depth of the prestressing reinforcement. Subsequently, optical instruments were inserted into the drilled probes to collect image data, as the transformation of the prestressing reinforcement cannot be determined in any other way in the case of girders of such age. Controlled breaking of the reinforceme

Název v anglickém jazyce

Experimental measurement of the anchorage length of interrupted prestressing reinforcement

Popis výsledku anglicky

This paper focuses on the current problems of breakage of prestressing reinforcement (mostly caused by corrosion) of prestressed precast bridge girders from 1960-1990 and its influence on the residual load-bearing capacity. Actual prestressed precast girders (I-73 structural type), which were developed in 1973 and which were in service from 1979 and 1980, were obtained for the purposes of experimental testing. Researchers from Brno University of Technology designed unique experiments on these girders to determine the actual anchor length of a fully grouted prestressing cable made of 4.5 mm patented wires. Semi-destructive probes were drilled along the length of the prestressing rein-forcement up to the depth of the prestressing reinforcement. Subsequently, optical instruments were inserted into the drilled probes to collect image data, as the transformation of the prestressing reinforcement cannot be determined in any other way in the case of girders of such age. Controlled breaking of the reinforceme

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/CK01000042" target="_blank" >CK01000042: Upřesnění zbytkové únosnosti předpjatých mostů</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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