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Techniques for the investigation of the ratchetting behaviour of piping components under internal pressure and simulated seismic loading
Author(s) -
Yahiaoui K.,
Moffat D. G.,
Moreton D. N.
Publication year - 1992
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.1992.tb00793.x
Subject(s) - piping , structural engineering , component (thermodynamics) , internal pressure , pressure vessel , instrumentation (computer programming) , bending , engineering , computer science , mechanical engineering , materials science , physics , composite material , thermodynamics , operating system
The ratchetting behaviour of piping components under internal pressure and simulated seismic loading has been investigated using special fixtures and a standard laboratory universal testing machine fitted with a fatigue module. Experimental arrangements are presented for testing plain pipes with or without thinned sections, elbows and tee branch junctions under in‐plane dynamic bending; similar fixtures and arrangements could be used for reducers and flanged connections and other types of loadings. Input accelerations up to 5g have been achieved and the results demonstrate that a great deal can be learnt about piping component behaviour from such simple arrangements and without resorting to sophisticated or expensive experimental techniques. The necessary instrumentation and algorithms for the analysis of results are described. Some sample results are included and discussed in terms of overall piping component behaviour. Two recommendations are suggested to more realistically simulate typical earthquake input spectra.