0
TECHNICAL PAPERS

Nonlinear Analysis of Jacket-Type Offshore Platforms Using Fiber Elements

[+] Author and Article Information
B. Asgarian

Civil Engineering Department, KN Toosi University of Technology, Tehran, Iranasgarian@kntu.ac.ir

A. A. Aghakouchak

Civil Engineering Department, Tarbiat Modarres University, Tehran, Irana_agha@modares.ac.ir

R. G. Bea

Department of Civil and Environmental Engineering, University of California at Berkeley, Berkeley, CAbea@ce.berkeley.edu

J. Offshore Mech. Arct. Eng 128(3), 224-232 (Jan 12, 2006) (9 pages) doi:10.1115/1.2185678 History: Received August 23, 2005; Revised January 12, 2006

A nonlinear fiber element for analysis of jacket type offshore structures is formulated and implemented in the nonlinear program DRAIN-3DX. This element can be used for modeling the nonlinear behavior of both strut and portal members. The element predicts buckling load and post buckling behavior of strut members accurately. It also produces fairly accurate results for yield load and post yield behavior of portal members. This element is verified using the experimental data for individual strut and portal members subjected to cyclic displacements. The element is then used to predict nonlinear behavior of two tested X-braced jackets made of tubular members under cyclic lateral displacement. The results are in good agreement with experiments and the results of other analytical models in terms of frame hysteretic behavior, energy dissipation, buckling load, load-deformation curve, strength and stiffness degradation.

Copyright © 2006 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 2

(a) Segments and fibers in a tubular member. (b) Geometric characteristic of the element.

Grahic Jump Location
Figure 3

Basic system degrees of freedom

Grahic Jump Location
Figure 4

Element degrees of freedom

Grahic Jump Location
Figure 5

Hysteretic behavior of tubular portal with constant axial load of p∕py=0.16

Grahic Jump Location
Figure 6

Hysteretic behavior of tubular portal with constant axial load of p∕py=0.48

Grahic Jump Location
Figure 7

(a) and (b) Analytical hysteretic behavior of strut No. 2

Grahic Jump Location
Figure 8

(a) and (b) Analytical hysteretic behavior of strut No. 5

Grahic Jump Location
Figure 9

(a) and (b) Analytical and experimental buckling load for struts Nos. 2 and 6 tested by Zayas

Grahic Jump Location
Figure 10

Geometry of tested tubular frames

Grahic Jump Location
Figure 11

(a) and (b) Prescribed deck displacement history for frames I and II

Grahic Jump Location
Figure 12

Lateral load versus deck lateral displacement using fiber beam column postbuckling element

Grahic Jump Location
Figure 13

(a) and (b) Experimental and analytical (using Maison model) hysteretic loops (19)

Grahic Jump Location
Figure 14

(a) and (b) Comparison of overall response for frame I

Grahic Jump Location
Figure 15

Frame I, hysteretic loops for cycles Nos. 5, 7, 9, and 12

Grahic Jump Location
Figure 16

Frame I, dissipated energy in different cycles

Grahic Jump Location
Figure 17

Frame I, lateral load versus lateral displacements using the fiber element

Grahic Jump Location
Figure 18

(a) and (b) Frame I, experimental and analytical (using Maison model) hysteretic Loop (19)

Grahic Jump Location
Figure 19

(a) and (b) Frame II, comparison overall response

Grahic Jump Location
Figure 20

Frame II, hysteretic loops for cycles Nos. 5, 7, 9, and 12

Grahic Jump Location
Figure 21

Frame II, dissipated energy in different cycles

Grahic Jump Location
Figure 22

Frame II, bracing member axial loads in different cycles

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In