structural detailing of prestressed concrete structures
design and construction of circular prestressed concrete structures with circumferential tendons
... 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 ... be stored in the tanks because of possible contamination of the contents 3.2.2 Structural floors—Structural floors may be prestressed or nonprestressed Prestressed structural floors should be designed...
Ngày tải lên: 24/10/2014, 17:26
design and construction of circular wire- and strand-wrapped prestressed concrete structures
... 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 ... CONSTRUCTION OF PRESTRESSED CONCRETE STRUCTURES 372R-7 Fig 2.1—Typical wall section of a wire- or strand-wrapped, cast-in-place, vertically prestressed tank Fig 2.2—Typical wall section of a wire-...
Ngày tải lên: 24/10/2014, 17:26
Construction Stage Analysis of Prestressed Concrete Box Bridge using General Funtions potx
... 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
A093 design of prestressed concrete 2005
... 28 Design properties of materials 29 2.1 Introduction 29 CONCRETE 2.2 Composition of concrete 30 2.3 Strength of concrete 30 2.4 Deformation of concrete 34 2.5 Predictions of the creep coefficient ... students of civil and structural engineering, and also for practising structural engineers The book began as notes for a series of lectures to structural engineers in a short course on prestressed concrete ... Professor Gilbert on committees of the Standards Association of Australia and his involvement in the development of the Australian Standard for Concrete Structures, AS 3600–1988 The scope of...
Ngày tải lên: 31/10/2016, 21:22
Evaluating the long-term durability of fiber reinforced polymers via field assessments of reinforced concrete structures
... 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 ... the adhesion of aluminum pucks for pull-off tests and a close-up of a prepared surface 66 3.32 Prepared areas for the adhesion of aluminum pucks for pull-off tests and a close-up of a prepared ... 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
Design of Offshore Concrete Structures _Appendices
... 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 ... the same time 5% of the reinforcement would be lacking or seriously corroded in critical sections Assessment of the consequences, if one of the structural elements should be torn off (as in 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
Design of Offshore Concrete Structures _ ch01
... 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 ... durability of offshore concrete structures has been studied by a working group appointed by FIP (FIP 1996) The conclusions of this group are, directly quoted: • • • • the concrete offshore platforms ... 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
Design of Offshore Concrete Structures _ch02
... 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
Design of Offshore Concrete Structures _ch03
... ''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, ... models The main objective of this evaluation of response characteristics is to sort load effects into respectively static and dynamic classes of response The characteristics of structural changes during...
Ngày tải lên: 01/05/2018, 10:17
Design of Offshore Concrete Structures _ch04
... 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 ... for Reliable Calculation of Sectional Forces in Concrete Structures Based on Finite Element Computations Department of Structural Engineering, The Norwegian Institute of Technology Kvamsdal, T ... 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...
Ngày tải lên: 01/05/2018, 10:17
Design of Offshore Concrete Structures _ch05
... 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 ... corresponding high concrete strength The importance of the self-weight of temporarily or permanently floating structures will often result in a demand for a high strength/density ratio of the concrete ... 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...
Ngày tải lên: 01/05/2018, 10:17
Design of Offshore Concrete Structures _ch06
... 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
Design of Offshore Concrete Structures _ch07
... 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 ... theoretical knowledge within structural mechanics is necessary to ensure that the model is representative of the real structure Among critical areas in the present design of offshore structures are the...
Ngày tải lên: 01/05/2018, 10:17
Design of reinforced concrete structures c10 100 pages
... 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 ... 21.5.3.1 10 Seismic Design of Reinforced Concrete Structures 6.Design of structural wall (shear wall) The aim is to design the structural wall section at the first floor of one of the identical frameshear ... consideration of the practical 466 Chapter 10 range of values of the principal structural parameters as well as the expected range of variation of the ground-motion parameters Structural parameters...
Ngày tải lên: 10/05/2018, 18:39
behaviour and modelling of reinforced concrete structures subjected to impact loads
... 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
Durability of Reinforced Concrete Structures,Theory vs Practice
... 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 ... 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 ... the reaction of the alkalis in concrete with the carbon dioxide in air, does not cause deterioration of concrete but it has important effects on the durability of reinforced concrete structures...
Ngày tải lên: 16/10/2022, 15:45
METHOD STATEMENT FOR WATER PROOFING OF UNDERGROUND CONCRETE STRUCTURES
... 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
An analytical method for predicting the structural response of ship side structures by bulbous bow in oblique collision scenarios
... The thickness of web girder The thickness of transverse web frame The thickness of stiffener The breadth of stiffener The thickness of the frame The thickness of the web The height of the web The ... rotation angle of the left part of the deformed plate Therefore, the strain rate of the left part of the deformed plate is: sin a1 1˙ = a˙ cos2 a1 (9) Similarly, the strain of the right part of the deformed ... deformation of ship side structures in oblique collision scenarios In this paper, a simplified analysis method is proposed to predict the structural response of the struck ship’s side structures...
Ngày tải lên: 28/01/2024, 15:06
Method Statement of production of prestressed concrete deck ( Thuyết minh BPTC đúc sẵn dầm bản )
... stretching, make the line of action of the tension force of the jack coincide with the axis of the prestressed steel strand; for curved prestressed steel strands, the line of action of the tension force ... for concrete pouring and concrete pouring 7) Curing concrete, Remove the side form8) Cut prestressed steel when concrete reaches over 75% of design strength 9) Remove the formwork at the end of ... 1980-2019DESCRIPTION OF WORKSScope of WorksThis is Method Statement for production of Prestressed Concrete Deck (PSC Deck) for superstructure Summary table of PSC Deck : No Type of Beam Number Bridge...
Ngày tải lên: 16/09/2024, 10:24
analysis and design of reinforced and prestressed-concrete guideway structures
... shortening of concrete d creep of concrete e shrinkage of concrete f relaxation of steel The amount of prestress loss due to these causes depends on a number of factors that include, properties of the ... derailment, kip (kN) Base of Napierian logarithms Modulus of elasticity of concrete, psi (Pa) 358.1R-3 Section 5.6.3 Eci = Modulus of elasticity of concrete at Es = Modulus of elasticity of reinforcement, ... provisions for prestressed concrete as well as nonprestressed concrete However, the torsion design provisions in this code are applicable only to nonprestressed concrete and not to prestressed concrete...
Ngày tải lên: 24/10/2014, 21:58