The Evolution of Offshore Pile Design Codes and Future Developments

Toolan, Fe; Horsnell, M R

doi:10.1007/978-94-017-2473-9_36

Cited by 2 publications

(4 citation statements)

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“…Similar histories were presented by Focht (1983) and Toolan and Horsnell (1992), but some repetition is given here for completeness and continuity. Similar histories were presented by Focht (1983) and Toolan and Horsnell (1992), but some repetition is given here for completeness and continuity.…”

Section: Introductionmentioning

confidence: 61%

“…As noted by Toolan and Horsnell (1992), different safety factors can result dcpendlng on whether WSDor LIWDis used to design piles. This immediately translates into different pile lengths for a given load regime depending on which of the design guidelines is used to design the foundation, For example, as pointed out by TooIan and Horsnell (1992), if gravity loads arc excluded, the combination of a load factor of 1.35 and a resistance factor of 0.8 results in an implied safety factor of 1.69 in LRFD.…”

Section: Comparison Of Safety Factors In Wsd and Lrfd Desiresmentioning

confidence: 99%

“…Finally Toolan and Horsnell (1992) point out that having lower load thctors and therefore lower safety factors for gravity loads (since these loads are known with greater certainty than environmental loads), "appears logical to most engineers but flies in the face of experience for those charged with designing piles." This 'discomfort' is perhaps due to the fact that pile capacity is known to be greater under loads that are rapidly or transiently applied as compared to loads that arc sustained for a long period of time.…”

Section: Comparison Of Safety Factors In Wsd and Lrfd Desiresmentioning

confidence: 99%

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Historical Development And Assessment Of The Current Api Design Methods For Axially Loaded Pipes

1993

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The design methods for axially loaded piles contained in the API RP 2A, Recommended Practice for Planning. Designing and Constructing Fixed Offshore Platiorms are continually evaluated and updated. To support this activity, API has fimded research over the past 10-12 years which has resulted in the establishment of an internationally recognized data base of axial pile load tests. Subsequent interpretation of these data led to sigrdllcant changes in the design methods for axially loaded piles for both sand and clay. The sand revisions, first incorporated into the 15th Edition of RP 2A provide improved statistical predictions (bias and coeftlcient of variation) of the sand data base than did the design methods for sand contained in earlier editions. The clay revisitms, first incorporated into the 17th Edition of RP 2A provide a statistical description of the clay data base that is similar to descriptions provided by earlier clay methods. Both the revised clay and sand methods provide a more technically sound framework than the methods contained in earlier editions. The revised methods are contained in the current, i.e., the 20th Edition of RP 2A (1993). These revisions have initiated considerable debate, and have prompted the authors to present their thoughts herein. A discussion of the data base, review of the philosophy and evolution of the design method, and a summary and analysis of the key criticisms are provided. The data have been exceedingly useful in formulating design practice, but in our opinion they are too limited to conclusively resolve many of the important issues. While some moditlcations to the present practice seem to be indicated, the References and figures at end of paper 253 authors believe that when combined with a careful site investigation, attention to installation detail and good engineering judgment, RP 2A continues to provide a sound basis for design of axially loaded piles.

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Section: Introductionmentioning

confidence: 61%

Section: Comparison Of Safety Factors In Wsd and Lrfd Desiresmentioning

confidence: 99%

Section: Comparison Of Safety Factors In Wsd and Lrfd Desiresmentioning

confidence: 99%

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Historical Development And Assessment Of The Current Api Design Methods For Axially Loaded Pipes

1993

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“…In deference to the European Community process of developing international offshore platform design standards through the International Standards Organization (which has a reliability-based format), the LRFD method will likely predominate Toolan and Horsnell 1993). The LRFD method includes partial safety factors (reduction factors for soil parameters and multiplication factors for loads) instead of lumped safety factors.…”

Section: B Static Deformation (Settlement and Differential Settlement)mentioning

confidence: 99%

Underwater Geotechnical Foundations

Lee¹,

Peterson²

2001

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The Evolution of Offshore Pile Design Codes and Future Developments

Cited by 2 publications

References 1 publication

Historical Development And Assessment Of The Current Api Design Methods For Axially Loaded Pipes

Historical Development And Assessment Of The Current Api Design Methods For Axially Loaded Pipes

Underwater Geotechnical Foundations

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