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Gabions and Geogrids
The century-old gabion concept can be improved upon by adding geogrid reinforcement to the soil embankments the gabion wall is designed to support. The grids add stability to the embankment...

Wave-Current Interaction with a Large Structure
The effects of a current on the diffraction of regular waves around a three-dimensional body are examined by a time-domain method. The Froude number is assumed to be small so that the...

Design Loads for Sloshing in TLP Pontoons Tanks
Impact of fluid inside the Auger TLP ballast tanks on tank walls was investigated and changes made to the structural design in an accelerated fashion through the use of model testing....

Measured and Simulated Response of a Small Semisubmersible Moored in Deep Water
Small semisubmersible platform concepts are proposed for electronic tracking ranges, single-well petroleum production, and oceanographic data collection. This paper summarizes a major...

Experimental Studies for the Port of Bilbao Extension
The Port of Bilbao is the leading port in Spain concerning total traffic volume. It also holds a relevant position in the international context. The Managing Board recently approved an...

A Simple Method to Compute Wave Loads on a TLP
In this paper, analytic diffraction (Linton and Evans, 1990) and radiation (Kim, 1992) solutions for arrays of bottom-mounted vertical circular cylinders are used to compute hydrodynamic...

Nonlinear Wave Runup on Large Circular Cylinders
Various design methods for computing nonlinear wave runup on a large-diameter circular cylinder are presented. First, empirical correlations are developed between the observed maximum...

Second-Order Hydrodynamic Interactions Between a Pair of Vertical Cylinders in Irregular Waves
A complete second-order solution is given for the hydrodynamic forces on a pair of bottom-mounted, surface-piercing, vertical circular cylinders in bichromatic seas. The constant structural...

Offshore Structures?Past, Present, and Future
A review of the evolution of offshore platforms concludes that the process is ongoing. New configurations continue to emerge and the range of applicability continues to expand. Today's...

Computer Aided Design for Deep Water Offshore Risers
This paper describes a software package (OTRC-Riser-91) that was developed under the sponsorship of the Offshore Research Technology Center that is funded by the National Science Foundation...

The Mother of All Resilient Structures: Fixed-Base Tower in 3000-Foot Water and Some Outstanding Issues
This paper describes design and development work for 40- to 80-well fixed- base - yet compliant - towers for 2000- to 3000-foot water depths. Technical issues which are covered include:...

Design of Tension Leg Platforms: A Knowledge Based Approach
Tension leg platforms (TLPs) are floating compliant platforms designed for deep water offshore hydrocarbon production. Only a few TLPs have actually been built, but others are currently...

Current Blockage Effects on Model-Scale Offshore Platform
This paper presents analysis results of model tests on a 1:47 scale model of an offshore jacket structure under wave-plus-tow (representing wave-plus-current) conditions. The analysis...

Wave Effects on Offshore Structures?Some Recent Research
The present paper summarizes methods of estimating wave effects on offshore structures, and highlights a selection of recent related research. Initially, certain aspects relating to the...

Re-Qualification of Offshore Platforms
Older platforms that are being re-qualified for extended service involve many technical problems that are unlike those associated with design of new platforms. Procedures to help resolve...

Sea Floor Wave-Induced Water Kinematics for Design of Pipeline
A statistical model is presented for horizontal velocity and acceleration of water particles beneath storm seas near the sea floor. An expansion of the kinematics with basis functions...

Probability of Wave Force on Horizontal Members
This study is motivated by the works of Isaacson and Subbiah (1990) to evaluate the vertical wave force on a rigid horizontal member located in the vicinity of still water level with its...

Reliable Design-Wave Force Predictions for Seabed Pipelines
The results of three separate field research projects have been pulled together to provide a design formula for maximum wave-induced horizontal force on a submarine pipe. This broadly-applicable...

Static Wave Force Procedure for Platform Design
Since results from the Ocean Test Structure were presented at Civil Engineering in the Oceans IV in 1979, there have been numerous laboratory experiments and a few full-scale measurements...

Screening Old Offshore Platforms: Previous Approaches and Further Thoughts
Several possible levels of analysis are identified, each leading to both quantitative (economic) and subjective (human) risk evaluations. These range from ratings based only on historical...

 

 

 

 

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