224-Dynamic Non-Linear Loading Effects on Offshore Platforms

Project Number	224
Date of Summary	February 25, 1998
Subject	Dynamic Non-linear Loading Effects on Offshore Platforms
Performing Activity	University of California at Berkeley
Principal Investigator	Mr. Robert G. Bea
Contracting Agency	California State Lands Commission
Estimated Completion	Complete
Description	The objective was to conduct parametric studies of the dynamic response of reduced degrees of freedom nonlinear systems and determine how the results from simplified nonlinear capacity analysis relate to the results from complex time-domain analysis of the performance of platforms in extreme condition storms. Observed platform performance during recent hurricanes (e.g. Andrew, Camille, Betsy, Hilda) were used to verify the analysis. Engineering guidelines were developed to define dynamic nonlinear loading-capacity effects on the overall performance characteristics of platforms.
Progress	Complete
Reports
AA (118 pages)	Bea, Robert G., Graduate Student Researchers, Loch, K. J., Young, P. L., Screening Methodologies for Use in Platform Assessments and Requalifications, Department of Civil Engineering, University of California at Berkeley, October 2, 1994.
AB (306 pages)	Mortazavi, M., Bea, Robert G., Screening Methodologies for Use in Platform Assessments and Requalifications, Final Project Report submitted by Marine Technology and Management Group Project, Department of Civil Engineering, University of California at Berkeley, January, 1996.
AC (96 pages)	Bea, Robert G., Stear, James D., Using Static Pushover Analysis to Determine the Ultimate Limit States of Gulf of Mexico Steel Template-Type Platforms Subjected to Hurricane Wind and Wave Loads, Marine Technology and Management Group Project, Department of Civil Engineering, University of California at Berkeley, March, 1996.
AD (39 pages)	Bea, Robert G., Stear, James D., Comparison of Two Screening Methodologies for Steel Template-Type Platforms: Ultimate Limit State Management Group Project, Department of Naval Architecture and Offshore Engineering, University of California, Berkeley, June, 1996. Limit Equilibrium Analysis (ULSEA) and Simplified Ultimate Strength Analysis (SUS), Report submitted by Marine Technology and
AE (86 pages)	Bea, Robert G., Stear, James D., Mortazavi, M., ULSEA- Manual of Operation, Manual submitted by Marine Technology and Management Group Project, Department of Naval Architecture and Offshore Engineering, University of California, Berkeley, June, 1996.
AF (194 pages)	Loch, Kenneth J., Bea, Robert G., Determination of the Ultimate Limit States of Fixed Steel-Framed Offshore Platforms Using Static Pushover Analyses, Report submitted by Marine Technology and Management Group, Department of Civil Engineering, University of California, Berkeley, May, 1995.
AG (96 pages)	Bea, Robert G., Stear, James D., Aviguetero, Teresa, Staneff, Stephen T., Screening Methodologies for Use in Platform Assessments and Requalifications, Department of Civil and Environmental Engineering, University of California at Berkeley, November 1996
AH (47 pages)	Bea, Robert G., Wiseman, James, Non-Linear Dynamics of Caisson Well-Protectors During Hurricane Andrew, Marine Technology Management Group, Department of Civil and Environmental Engineering, University of California at Berkeley, August 1997.
AI (72 pages)	Bea, Robert G., Stear, James D., Aviguetero, Teresa, Staneff, Stephen T., Screening Methodologies for Use in Platform Assessments and Requalifications, Phase III, project meeting notes, Department of Civil and Environmental Engineering, University of California at Berkeley, June 18-19, 1997.
AJ (16 pages)	Bea, Robert G., et. al., Verification of a Simplified Methods to Evaluate the Capacities of Template-Type Platforms, presented at the 27th Annual Offshore Technology Conference, Houston, Texas, May 1-4, 1995.
AK (18 pages)	Bea, Robert G. and Mortazavi, M., A Simplified Structural Reliability Analysis Procedure for Use in Assessments and Requalifications of Template-Type Offshore Platforms, presented at the 6th International Offshore and Polar Engineering Conference, Los Angeles, California, May 26-31, 1996.
AL (8 pages)	Bea, Robert G., Loch, K.J., and Young, P.L., Capacities of Template-Type Platforms in the Gulf of Mexico During Hurricane Andrew, Journal of Offshore Mechanics and Arctic Engineering, Vol. 119, February 1997.
AM (14 pages)	Stear, James D. and Bea, Robert G., Ultimate Limit Stae Capacity Analyses of Two Gulf of Mexico Platforms, presented at the 28th Annual Offshore Technology Conference, Houston, Texas, May 5-8, 1997.
AN (16 pages)	Bea, Robert G. and Mortazavi, M., Experimental Validation of the Ultimate Limit State Equilibrium Analysis (ULSLEA)with Results from Frame Tests, presented at the 7th International Offshore and Polar Engineering Conference, Honolulu, Hawaii, May 25-30, 1997.
AO (110 pages)	Stear, James D. and Bea, Robert G., ULSLEA Enhancements: Fatigue Analysis/Earthquake Analysis/Additional Configurations, Screening Methodologies Project Phase III, Report to Joint Industry Project Sponsers, Department of Civil Engineering, University of California, Berkeley, June 1997.
AP (94 pages)	Stear, James D. and Bea, Robert G.,Earthquake Analysis of Offshore Platform, Screening Methodologies Project Phase III, Report to Joint Industry Project Sponsors, Department of Civil Engineering, University of California at Berkeley, June 1997.
AQ (47 pages)	Wiseman, James and Bea, Robert, Non-Linear Dynamics of Casson Well-Protectors During Hurricane Andrew, Report to the U.S. Minerals Management Service, Department of Civil Engineering, University of California, Berkeley, August 1997.
AR (58 pages)	Bea, Robert G., et. al., Screening Methodologies for Use in Offshore Platform Assessment and Requalifaction: Phase IV, project meeting notes Department of Civil Engineering, University of California at Berkeley, January 29-30, 1998.
AS (148 pages)	Xu, Tao, and Bea, Robert, Reassessment of the Tubular Joint Capacity: Uncertainty and Reliability, Screening Methodologies Project Phase IV, Report to Joint Industry Project Sponsors, Marine Technology and Management Group, Department of Civil Engineering, University of California at Berkeley, January 1998.
AT (70 pages)	Jin, Zhaohuui, and Bea, Robert,Loading and Capacity Characteristics of Pile Foundations: Correlation of Calcuation Results with ULSLEA, Screening Methodologies Project Phase IV, Report to Joint Industry Project Sponsors, Marine Technology and Management Group, Department of Civil Engineering, University of California at Berkeley, January 1998.
AU (176 pages)	Jin, Zahaohui; Bea, R. G., Hurricane Wave Characteristics and Performance Characteristics of Platform Pile Foundations in the Bay of Campeche, Mexico Screening Methodologies Project Phase IV, Joint Industry Project Sponsors, Marine Technology and Management Group, Depart. of Civil and Environmental Engineering, University of California at Berkeley, May, 1999.
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