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Limit strength of sandwich pipes filled with strain hardening cementitious composites



Title: Limit strength of sandwich pipes filled with strain hardening cementitious composites
Author(s): C. An, X. Castello, R.D. Toledo Filho and S.F. Estefen
Paper category : conference
Book title: 2nd International RILEM Conference on Strain Hardening Cementitious Composites (SHCC2-Rio)
Editor(s): R.D. Toledo Filho, F.A. Silva, E.A.B. Koenders and E.M.R. Fairbairn
ISBN: 978-2-35158-120-9
e-ISBN: 978-2-35158-121-6
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 409 - 419
Total Pages: 11
Nb references: 33
Language: English


Abstract: Sandwich Pipes (SP) can be an effective solution for the ultra-deepwater submarine pipeline, combining high structural resistance with thermal insulation. Besides polymer, strain hardening cementitious composites (SHCC), a micromechanically designed material with the characteristic of high tensile ductility, can be another choice for the annular material. The purpose of this work is to investigate numerically the limit strength of SP with SHCC under external pressure and longitudinal bending. The mechanical behaviors of SHCC are simulated using a damaged plasticity model whose parameters are estimated by the tension and compression tests. The pressure-curvature (P - K) failure envelopes for SP with unbonded and fully bonded interface conditions are presented. The results show that the interface condition and the thickness of the annulus are the main influence factors on the overall structural behaviour. Besides, the lateral confinement effect caused by the inner and outer tubes and the ultra high ductility of SHCC itself lead to the new observations of the pressure-curvature collapse envelops.


Online publication: 2012-01-25
Publication type : full_text
Public price (Euros): 0.00