ACI 357.2R 10:2010 Edition

$41.44

357.2R-10 Report on Floating and Float-In Concrete Structures

Published By	Publication Date	Number of Pages
ACI	2010	45

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Category: ACI

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Description

This report addresses the practical experience and engineering considerations for the design and construction of floating concrete structures. Recommendations for design loads and design criteria are presented. Design procedures and methods of analysis are discussed to better acquaint the reader with the design considerations unique to floating marine structures. Methods used to construct floating concrete structures play a major role in the success of each application. Construction methods and materials used for recent applications are presented to demonstrate the importance of the construction process during the planning and design of marine concrete structures. Important aspects of delivery, from the construction site and installation at the deployment site, are presented. The durability and serviceability of floating structures at remote sites are important considerations to project planners and developers. Construction execution, materials selection and inspection, maintenance, and repair techniques are discussed. The materials, processes, quality control measures, and inspections described in this document should be tested, monitored, or performed as applicable only by individuals holding the appropriate ACI Certifications or equivalent. Keywords: abrasion; accidents; admixtures; aggregates; concrete construction; concrete durability; detailing; dynamic loads; fatigue (materials); finite element method; floating structures; inspection; installing; lightweight concretes; limit design method; loads forces; maintenance moorings; permeability; post-tensioning; precast concrete; prestressed concrete; prestressing steels; quality control; reinforced concrete; reinforcing steels; repairs; serviceability; ships, stability; structural design surveys; towing.

PDF Catalog

PDF Pages	PDF Title
3	CONTENTS
4	CHAPTER 1— INTRODUCTION AND SCOPE 1.1— Introduction 1.2—Scope CHAPTER 2— NOTATION, DEFINITIONS, AND ACRONYMS 2.1—Notation
5	2.2—Definitions 2.3—Acronyms CHAPTER 3— APPLICATIONS 3.1— Introduction 3.2—Historical background
6	3.3—Ships and barges
7	3.4—Industrial plantships
10	3.5—Floating piers and docks 3.6—Floating bridges
13	3.7—Immersed tunnels
14	3.8—Navigation structures
15	3.9—Summary CHAPTER 4— MATERIALS AND DURABILITY 4.1— Introduction
16	4.2—Testing and quality control 4.3—Structural marine concrete 4.3.1 General 4.3.2 Marine lightweight concretes
17	4.3.3 Constituent materials 4.3.3.1 Cement 4.3.3.2 Aggregates 4.3.3.3 Mixing water
18	4.3.3.4 Admixtures 4.4—Reinforcement and concrete cover 4.5— Special considerations 4.6—Summary
19	CHAPTER 5— EVALUATION OF LOADS 5.1— Introduction 5.2—Types of loads 5.2.1 Dead loads 5.2.2 Live loads 5.2.3 Deformation loads 5.2.4 Accidental loads 5.2.5 Construction loads 5.2.6 Environmental loads
20	5.3—Load determination 5.3.1 Procedures 5.3.2 Quasi-static procedure 5.3.2.1 General 5.3.2.2 Local loads 5.3.3 Dynamic procedure 5.3.3.1 General
21	5.3.3.2 Environmental conditions 5.3.3.3 Hydrodynamic pressure calculations
22	5.3.3.4 Determination of rigid body motions and inertial loading 5.3.3.5 Response amplitude operator calculation 5.3.3.6 Response spectrum
23	5.3.3.7 Design values 5.4—Summary CHAPTER 6— DESIGN APPROACHES 6.1— Introduction 6.2—Overview of design code requirements 6.2.1 Ultimate limit state 6.2.2 Fatigue limit state 6.2.3 Progressive collapse limit state 6.2.4 Serviceability limit state
24	6.3—Fatigue
25	6.4—Serviceability 6.5—Hull arrangements
26	6.6—Analysis methodology 6.6.1 Superposition of loads
27	6.6.2 Finite element modeling and analysis techniques
28	6.7—Design and detailing 6.7.1 Weight control 6.7.2 Inspection 6.7.3 Detailing 6.8—Summary
29	CHAPTER 7— CONSTRUCTION 7.1— Introduction 7.2—Construction methods 7.2.1 Construction on slipways 7.2.2 Construction in graving dock 7.3—Concrete construction 7.3.1 Precast/cast-in-place construction
30	7.3.2 Cast-in-place construction 7.3.3 Post-tensioning
31	7.3.4 Grouting of anchorages 7.3.4.1 Grouting tendon ducts
32	7.3.4.2 Tendon anchorages 7.3.5 Suction bond 7.4—Construction afloat 7.5—Segmental construction—joining while afloat
33	7.6—Summary CHAPTER 8— TOWING AND INSTALLATION 8.1— Introduction
34	8.2—Design considerations 8.2.1 Intact and damage stability
35	8.2.2 Strength 8.2.3 Response to motion 8.2.4 Towing connections 8.2.5 Moorings 8.2.6 Other considerations
36	8.3—Tow route 8.3.1 Depth of water 8.3.2 Towing in restricted water 8.3.3 Towing at sea 8.3.4 Environmental criteria and weather limitations 8.4—Summary CHAPTER 9— MAINTENANCE, INSPECTION, AND REPAIR 9.1— Introduction
37	9.2—Structural deterioration 9.3—Surveys and periodic inspection
38	9.4—Repairs 9.4.1 Approaches to repair 9.4.2 Materials 9.4.2.1 Introduction 9.4.2.2 Cement 9.4.2.3 Aggregates
39	9.4.2.4 Resins 9.4.2.5 Concrete composition 9.4.3 Repair methods 9.4.3.1 Cracks 9.4.3.2 Surface damage 9.4.3.3 Major damage
40	9.4.3.4 Corrosion damage 9.4.3.5 Underwater repairs 9.5—Summary CHAPTER 10— REFERENCES 10.1— Referenced standards and reports
41	10.2—Cited references