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357.1R-91
This new report brings together the relevant experience currently available in designing and building offshore arctic concrete structures. Design criteria have been highlighted, problem areas discussed and future research needs identified. The documnent is aimed principally at the arctic and sub-artic areas bordering the United States and Canadian coastlines (Fig. 1). The arctic environment and its influence on structures are identified. Typical environmental and geotechnical conditions, types of ice features, and efforts on ice surveillance and ice measurements are discussed. Existing and proposed forms of arctic structures are described. Design criteria, materials durability in the arctic environment, and effects of coatings on reducing ice adhesions and friction are discussed together with special considerations for structural and foundation design. Research and development needs to further improve the design of arctic structures are identified. Contents:
2.1 The U.S. Arctic 2.2 The Canadian Arctic 2.3 Environmental effects on offshore arctic structures 2.4 Efforts on ice surveillance and measurements in the Arctic
3.1 Existing structures 3.2 Proposed arctic concrete structures 3.3 New Developments
4.1 Introduction 4.2 Design criteria 4.3 Design philosophies 4.4 Analysis 4.5 Structural design 4.6 Safety and pollution control 4.7 Other factors to be considered in design
5.1 Cement 5.2 Aggregates 5.3 Mixing water 5.4 Admixtures 5.5 Concrete 5.6 Reinforcing and prestressing steel 5.7 Post-tensioning ducts 5.8 Grout for bonded tendons 5.9 Inserts and embedments 5.10 Durability of concrete in arctic structures 5.11 Coatings for concrete surfaces
6.1 Geotechnical properties of the arctic seafloor 6.2 Considerations for foundation design
7.1 Introduction 7.2 Construction methods 7.3 Construction materials 7.4 Salient construction features 7.5 Construction aspects of recently completed arctic concrete structures
8.1 Introduction 8.2 Environmental criteria and weather limitations 8.3 Ocean towage 8.4 Depth of water 8.5 Towage in restricted waters 8.6 Intact and damage stability 8.7 Motion response 8.8 Structural strength 8.9 Towing connections 8.10 Moorings 8.11 Installation 8.12 Marine safety 8.13 Platform relocation and removal
9.1 Background 9.2 Maintenance inspection repair program 9.3 Inspection 9.4 Damage classification 9.5 Repair methods
11.1 American Bureau of Shipping 11.2 American Concrete Institute 11.3 American Petroleum Institute 11.4 ASTM 11.5 American Welding Society 11.6 Canadian Standards Association 11.7 Det norske Veritas 11.8 Federation Internationale de la Precontrainte |
ACI
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