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Research Papers: Materials Technology

Experimental Study on the Collapse Strength of Narrow Stiffened Panels

[+] Author and Article Information
C. Guedes Soares

Centre for Marine Technology and Engineering (CENTEC),
Instituto Superior Técnico, Lisbon,
Technical University of Lisbon,
Lisbon, Portugal

Contributed by the Ocean Offshore and Arctic Engineering Division of ASME for publication in the Journal of Offshore Mechanics and Arctic Engineering. Manuscript received May 15, 2011; final manuscript received July 10, 2012; published online February 25, 2013. Assoc. Editor: Pingsha Dong.

J. Offshore Mech. Arct. Eng 135(2), 021402 (Feb 25, 2013) (10 pages) Paper No: OMAE-11-1043; doi: 10.1115/1.4007566 History: Received May 15, 2011; Revised July 10, 2012

The results of five tests on narrow stiffened panels under axial compression until collapse and beyond are presented to investigate the collapse behaviors of stiffened panels. Tension tests were used to evaluate the material properties of the stiffened panels. The tests were made on panels with two half bays plus one full bay in the longitudinal direction. Initial loading cycles were used to eliminate the residual stresses of the stiffener panels. The strain gauges were set on the plates and the stiffeners to record the strain histories. The displacement load relationship was established. The collapse behavior, modes of failure and load-carrying capacity of the stiffened panels are investigated with the experiment.

Copyright © 2013 by ASME
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References

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Guedes Soares, C., Luís, R. M., Teixeira, A. P., Quesnel, T., Nikolov, P. I., Steen, E., Khan, I. A., Toderan, C., Olaru, V. D., Bollero, A., and Taczala, M., 2008, “Parametric Study on the Collapse Strength of Rectangular Plates With Localized Imperfections Under In-Plane Compression,” Int. Shipbuild. Prog., 55, pp. 63–85. [CrossRef]
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Luís, R. M., Guedes Soares, C., and Nikolov, P. I., 2008, “Collapse Strength of Longitudinal Plate Assemblies With Dimple Imperfections,” Ships and Offshore Structures, 3(4), pp. 359–370. [CrossRef]
Gordo, J. M., and Guedes Soares, C., 2004, “Experimental Evaluation of the Ultimate Bending Moment of a Box Girder,” Marine Systems & Ocean Technology, 1(1), pp. 33–46.
Gordo, J. M., and Guedes Soares, C., 2007, “Experimental Evaluation of the Behaviour of a Mild Steel Box Girder Under Bending Moment,” Advancements in Marine Structures, C.Guedes Soares and P. K.Das, eds., Taylor & Francis Group, London, pp. 377–383.
Saad-Eldeen, S., Garbatov, Y., and Guedes Soares, C., 2010, “Experimental Assessment of the Ultimate Strength of a Box Girder Subjected to Four-Point Bending Moment,” Proceedings of the 11th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS2010), ABS, Houston, TX.
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Xu, M. C., and Guedes Soares, C., 2011, “Numerical Study of the Effect of Geometry and Boundary Conditions on the Collapse Behaviour of Short Stiffened Panels,” Advances in Marine Structures, C.Guedes Soares and W.Fricke, eds., Taylor & Francis Group, London, UK, pp. 229–237.

Figures

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Fig. 1

Geometry and strain gauges setting of the stiffened panels

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Fig. 2

Boundary condition setup of the test

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Fig. 3

Setup of tension test

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Fig. 4

Stress-strain curves of the material

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Fig. 5

Removed curve from the other diagrams

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Fig. 6

Ultimate forces of the stiffened panels

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Fig. 7

Gap between stiffener and support steel block

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Fig. 8

Load–displacement curve of the panel

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Fig. 9

Deformation after collapse for test (FB2A2F6)

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Fig. 10

Strains during the initial cycle (0-202 kN) (FB2A2F6)

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Fig. 11

Strains from the second cycle to collapse (401–680 kN) (FB2A2F6)

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Fig. 12

Strains from collapse to the third cycle (680–434 kN) including unloading (FB2A2F6)

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Fig. 13

Strain-displacement curves (FB2A2F6)

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Fig. 14

Load–displacement curve of the panel (FB3A2F6)

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Fig. 15

Deformation of panel after collapse (FB3A2F6)

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Fig. 16

Strains during the initial cycle (0–153.8 kN) (FB3A2F6)

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Fig. 17

Strains from collapse to second cycle unloading (637.3–400.9 kN) (FB3A2F6)

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Fig. 18

Strain-displacement curves (FB3A2F6)

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Fig. 19

Load–displacement curve of the panel (FB4A2F6)

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Fig. 20

Deformation after collapse (FB4A2F6)

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Fig. 21

Strains during initial cycle (0–295 kN) (FB4A2F6)

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Fig. 22

Strains from second cycle to collapse (404-0-594.8 kN) (FB4A2F6)

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Fig. 23

Strain-displacement curves (FB4A2F6)

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Fig. 24

Load-displacement curve of the panel (FB45A2F6)

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Fig. 25

Deformation after collapse for test (FB45A2F6)

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Fig. 26

Strains during the initial cycle (0–199.8 kN) (FB45A2F6)

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Fig. 27

Strains from start to collapse (0–199.8 kN) (FB45A2F6)

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Fig. 28

Strains during unloading (FB45A2F6)

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Fig. 29

Strain-displacement curves (FB45A2F6)

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Fig. 30

Load–displacement curves of the panel (FB6A2F6)

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Fig. 31

Deformation after collapse for test (FB6A2F6)

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Fig. 32

Strains during the initial cycle (0-145-15 kN) (FB6A2F6)

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Fig. 33

Strains during unloading (459–0 kN) (FB6A2F6)

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Fig. 34

Strain-displacement curves (FB6A2F6)

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Fig. 35

Strain-displacement curves (FB6A2F6)

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