7—field performance of prestressed concrete structures

... Activity Model Fixed platforms—Concrete substructures checklists The objective of Appendix A is to present possible checklists for design of offshore concrete substructures Such checklists could ... each case limit the value of the verification activities © 2000 Edited by Ivar Holand, Ove T Gudmestad and Erik Jersin 208 Appendices The degree of independence is often of vital importance to the ... Review of the Design Criteria Civil Design Review Design Review of the Shaft Design Design Review of tri-cell reinforcement, etc Mechanical Design Review Engineering Readiness Review (often used

Ngày tải lên: 01/05/2018, 10:17

... for Design of Offshore Concrete Structures Statoil, Stavanger, Norway Gudmestad, O.T., Warland, T Aa and Stead, B.L (1993) Concrete Structures for development of offshore fields Journal of Petroleum ... examples of use for other types of structures: Know-how on: • high performance concrete (sub-merged tunnels, any concrete structures designed for longterm durability) • high-strength normal-weight concrete ... In spite of good experience with concrete structures, they will not be competitive for all offshore projects A few essential arguments for the choice of a concrete structure, because of cost efficiency,

Ngày tải lên: 01/05/2018, 10:17

... those having special interest in offshore concrete structures promote and enhance the confidence in offshore concrete structures give an overview of how to design a concrete platform, an overview ... floating concrete structures, respectively It is of special importance, for further insight, to recognise the names of the various elements of the structures For several typical offshore concrete ... Jersin 2.6.2 Selection of concrete structures Concrete structures are relevant for quite a number of various field developments It should be noted that: • fixed concrete structures with short

Ngày tải lên: 01/05/2018, 10:17

... ''Mechanics of Wave Forces on Offshore Structures'', van Nostrand Reinhold Company T.H.Søreide (1981): ''Ultimate Load Analysis of Marine Structures'', Tapir, Norway References American Concrete ... calculated for both directions Often the governing case is during the mating of the deck to the shaft For the lower part of a shaft of a floating platform or the cell walls of a gravity base structure, ... from finite rigid body rotations of floating structures are also illustrated The problem areas dealt with for floating marine structures are also relevant for fixed structures during fabrication,

Ngày tải lên: 01/05/2018, 10:17

... E and Grosch, H.: Design of Offshore Concrete Structure Based on Postprocessing of Results from Finite Element Analysis (FEA), Proceedings of the Fourth International Offshore and Polar Engineering ... by studies of accuracy it is necessary to be aware of the phenomenon Tools to support the study of the accuracy of finite element models are so far only implemented in commercial software to ... non-linearities Material non-linearity occurs in all design of reinforced concrete, for example when cracking of concrete and yielding of reinforcement is considered Here, however, only the cases

Ngày tải lên: 01/05/2018, 10:17

... Concrete Structures Dr.ing Thesis 1990:31, Division of Concrete Structures, The Norwegian Institute of Technology Brekke, D.-E., Åldstedt, E and Grosch, H (1994) Design of Offshore Concrete Structures ... density concrete and LC55-LC65 for lightweight aggregate concrete (where numbers refer to 28 days cube strength) are often used The tendency during the development of offshore concrete structures ... Fatigue of the longitudinal or shear reinforcement due to the large number of load cycles from the wave action may be decisive for certain parts of concrete platform structures Fatigue of concrete

Ngày tải lên: 01/05/2018, 10:17

... 3: Guidelines for the application of ISO 9001 in development, supply and maintenance of software 6.1.2 Special features of engineering and design of concrete structures at sea In relation to Quality ... of concrete structures at sea The description particularly concentrates on important elements, considering the scope of this book Consequently, this chapter does not give a complete picture of ... design of concrete structures (Gravity Base Structures—GBS) at sea: • Improved calculation models and larger computer capacity has led to more reliable calculations and better utilisation of loadbearing

Ngày tải lên: 01/05/2018, 10:17

... Verification of design Tore H.Søreide, Reinertsen Engineering 7.1 Introduction The purpose of this description of verification is to present a procedure for control for detailed design of offshore structures ... Erik Jersin Verification of design 177 NPD provides a detailed list of verification activities These are areas of verification that all engineering on offshore loadbearing structures should undergo ... model is representative of the real structure Among critical areas in the present design of offshore structures are the modelling for stress analysis and the selection of relevant design wave

Ngày tải lên: 01/05/2018, 10:17

... problem of designing earthquakeresistant reinforced concrete buildings, like the design of structures (whether of concrete, steel, or other material) for other loading conditions, is basically one of ... case of earthquakes of volcanic origin) 10.1.3 Estimates of Demand Estimates of force and deformation demands in critical regions of structures have been based on dynamic analyses—first, of simple ... function of initial fundamental period and yield level of 20-story structural walls (From Ref 10-4.) 10 Seismic Design of Reinforced Concrete Structures shows results of dynamic analysis of two

Ngày tải lên: 10/05/2018, 18:39

... Response of Reinforced Concrete Structures 2.3 Global Response of Reinforced Concrete Structures 15 2.4 Significance of the Current Study .31 Finite Element Modelling Of Reinforced ... Department of Civil Engineering University of Toronto © Copyright by Selỗuk Saatcừ (2007) BEHAVIOUR AND MODELLING OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO IMPACT LOADS Doctor of Philosophy ... Since the advent of reinforced concrete structures, the analysis and design of these structures against extreme loads, such as earthquakes, blasts, and impacts, has been an objective of many researchers

Ngày tải lên: 13/11/2020, 14:53

... analysis of the structure A reinforced concrete structure may deteriorate because of deterioration of the concrete itself or because of corrosion of the steel reinforcing bars inside the concrete ... improvement of durability through better concrete mix design (or more specifically use of high-performance concrete), more careful crack control, use of corrosion inhibitors and use of protective ... Durability of Reinforced Concrete Structures, Theory vs Practice Albert K.H Kwan and Henry H.C Wong Department of Civil Engineering, The University of Hong Kong, Hong Kong Abstract: The durability of concrete

Ngày tải lên: 16/10/2022, 15:45

... plaster or concrete II Waterproofing construction process Preparation of the waterproofing surface - Chopping, chiseling off layers of cement mortar and excess concrete to show the surface of structural ... the waterproofing material will not penetrate deeply into the concrete body to create links (but water remaining on concrete surface is avoided) - Waterproofing reinforcement treatment of sockets, ... steel, - The defects of concrete such as sockets, holes should not be covered with cement mortar before the waterproofing treatment - Water supply and drainage pipes through concrete or technical

Ngày tải lên: 20/11/2023, 09:40

... Mode G: cohesive failure in concrete substrate 70 3.44 Failure Modes of Pull-off Tests from 2003 and 2011 71 3.45 Histogram of Pull-off Test Strength 74 3.46 PDF of Pull-off test results 74 3.47 ... length of rebar, Hu et al (2004) describes the importance of bond to the performance of the composite, “The usual strengthening method is to bond the FRP laminates on the surface of concrete structures, ... DURABILITY OF FIBER REINFORCED POLYMERS VIA FIELD ASSESSMENTS OF REINFORCED CONCRETE STRUCTURES Fiber Reinforced Polymer Composites (FRP) are an attractive repair option for reinforced concrete structures, ...

Ngày tải lên: 12/05/2017, 22:38

... modulus of elasticity of concrete under short-term load, psi Eci = modulus of elasticity of concrete at age ti, psi Es = modulus of elasticity of reinforcement, assumed to be the same for prestressed ... Related Concrete Structures 350 R Environmental Engineering Concrete Structures 350.1 R Testing Reinforced Concrete Structures for Watertightness 350.2 R Concrete Structures for Containment of Hazardous ... Cast-in-Place Concrete • Precast Concrete d Wall-Roof Joints • Hinged • Fixed • Partially Fixed • Free e Roofs • Concrete Dome Roofs with Prestressed Dome Ring (1) Cast-in-place Concrete (2) Shotcrete...

Ngày tải lên: 24/10/2014, 17:26

... 2.4.2 Dome roofs 2.4.2.1 Design method Concrete or shotcrete dome roofs should be designed on the basis of elastic shell analysis DESIGN AND CONSTRUCTION OF PRESTRESSED CONCRETE STRUCTURES 372R-11 ... corrosion of steel reinforcement Nonprestressed concrete members should meet the allowable chloride-ions limits of ACI 350-01 In prestressed concrete members where the concrete is separated from the prestressed ... (MPa) Es = modulus of elasticity of steel, lb/in.2 (MPa) f ′c = specified compressive strength of concrete, lb/in.2 (MPa) f ′ci = compressive strength of concrete at time of prestressing, lb/in.2...

Ngày tải lên: 24/10/2014, 17:26

... diameter E cm Secant modulus of the concrete Ec Modulus of elasticity of concrete Es Modulus of elasticity of steel F Force F du Ultimate force carrying capacity of impact damaged beam F el Predicted ... with concrete to form composite sandwich structures Lightweight concrete of density < 1450 kg/m3 is used to reduce the overall weight of the sandwich structures Shear transfer capacity of the ... strength on the permanent dent profile of face plate of SCS sandwich (6 mm thick face plate)……… …………….98 Fig 4.10 Effect of fibre on the permanent dent profile of face plate of SCS sandwich (face plate...

Ngày tải lên: 14/09/2015, 14:08

... Reinforced concrete 3.1 General 3.2 The historical development of reinforced concrete 3.3 General principles of reinforced concrete 3.4 Reinforced concrete in bending 3.5 The cracking of reinforced concrete ... intuitive understanding of the behaviour of structures, a thorough understanding of the nature of the various building materials, and an appreciation of the appearance of their structures This distinction ... 44 m diameter spherical concrete dome, resting on concrete walls that are some 30 m high In order to reduce the thrust of the roof, it is made of lightweight concrete, of which the density reduces...

Ngày tải lên: 18/02/2014, 18:20

... of concrete at the age of 28 days (35000) Relative Humidity of ambient environment (40 ~ 99) (70) Notational size of member (1) Type of cement>Normal or rapid hardening cement (N, R) Age of concrete ... “Construction stage analysis of prestressed concrete box bridge (FCM) using the Wizard”, and will not be repeated in this tutorial Construction Stage Analysis of Prestressed Concrete Box Bridge (FCM) ... Relative Humidity of ambient environment (40 ~ 99) (70) Notational size of member (1) Type of cement>Normal or rapid hardening cement (N, R) Age of concrete at the beginning of shrinkage (3) ↵...

Ngày tải lên: 01/04/2014, 03:20

... exception of a few plants of A pseudoplatanus Plant survival at the end of the growing season was lower compared to the beginning of the season, in all species (figure 4) Most C sativa seedlings of ... dates of planting, of the first survival assessment and of the final survival assessment Effects of desiccation and freezing on seedlings 61 62 K Radoglou and Y Raftoyannis water of known conductivity ... dry weights of the leaf, root and shoot were also measured at the end of growing season, by drying the plant tissues of a sample at 100 °C for 24 h 2.4 Data analysis The effects of desiccation...

Ngày tải lên: 08/08/2014, 14:21