Book reviewsStrutture de calcestruzzo armato e di calcestruzzo precompresso (Reinforced concrete and prestressed concrete structures) by Dott. Ing. MorandiRiccardo Published by Libreria Dedalo Editric, Rome, Italy. 1954. Price 4,600 lire, pp. 141.

1954 ◽  
Vol 6 (17) ◽  
pp. 106-106
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
Concrete Structures

Numerical Modeling of Time-Dependent Deformations of Concrete at 3D Analysis of Structures

2020 ◽  
Author(s):  
◽  
Ante Džolan
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
Concrete Structures ◽  
Real Life ◽  
Nonlinear Behavior ◽  
3D Analysis ◽  
Actual Behavior ◽  
Realistic Simulation ◽  
Highly Nonlinear ◽  
Prestressed Structures

Concrete is a material with highly nonlinear behavior. In parallel, there are numerous secondary effects in concrete, such as aging, shrinkage, and creep, which further complicate the realistic simulation of reinforced concrete and prestressed concrete structures. In modern times, due to bolder construction, increasing spans and high rising construction, the need for realistic simulation of the behavior of concrete structures under conditions of various types of loads is becoming more pronounced. On the other hand, models with a small number of real-life parameters that can describe the actual behavior of concrete as accurately as possible are necessary. One such model, the previously developed model Precon 3D, which is based on a small number of parameters and can very well describe the behavior of concrete, reinforced concrete and prestressed structures for short-term static loads was taken as the basis for this work. Through this work, the numerical model Precon 3D has been upgraded with a model for following the behavior of concrete during time, i.e. the model has been upgraded with a model of creep and shrinkage of concrete, which is necessary for following the behavior of prestressed structures. The developed software has been tested against several experimental examples from the literature, with a very good match between numerical and experimental results.

scholarly journals Directions of Convergence of the Requirements of the Main Domestic Standard for the Design of Concrete and Reinforced Concrete Structures SP 63.13330.2012 with the Requirements of the International Standard ISO 19338

2019 ◽  
pp. 93-98
Author(s):  
Sergey B. Krylov ◽  
Ravil S. Sharipov ◽  
Sergey A. Zenin ◽  
Yury S. Volkov
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
Concrete Structures ◽  
National Standards ◽  
Reinforced Concrete Structures ◽  
Building Structures ◽  
Design Standards ◽  
Structural Concrete ◽  
International Standard ◽  
Assessment Requirements

Design standards on building structures should contain, first of all, the performance and assessment requirements of structures. At the same time, design standards should provide the possibility for design and construction of concrete and reinforced concrete parts of buildings and structures that meet the requirements of the Technical regulations "On the safety of buildings and structures". Taking into account the importance of ensuring the reliability and safety of buildings and structures erected with the use of structural concrete, the technical Committee of the international organization for standardization ISO TC 71 "Concrete, reinforced concrete and prestressed concrete", certifies national standards for compliance with the requirements of the international standard ISO 19338 "Performance and Assessment Requirements for Design Standards on Structural Concrete", developed by the same Committee. The standard describes the issues that should be included in the standards for the design of concrete and reinforced concrete structures (terms and definitions, basic requirements, performance requirements,loads and impacts, design estimates, requirements for manufacturing and construction, as well as quality control). These requirements are common to all standards in the design of concrete and reinforced concrete structures. In this regard, it is relevant and important to establish the possibility of presenting the National Code of rules SP 63.13330.2012 "SNiP 52.01-2003 Plain and Reinforced Concrete Structures. General Provisions" for certification for compliance with the requirements of ISO 19338. To achieve this goal, the relevant work has been done, based on the results of which were made the proposals for the submission of SP 63.13330.2012 for certification for compliance with ISO 19338:2014. These proposals are set out in the text of the article.

scholarly journals Prestressed concrete seismic design

1969 ◽  
Vol 2 (3) ◽  
pp. 251-266
Author(s):  
K. E. Williamson
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Prestressed Concrete ◽  
Structural Engineering ◽  
Civil Engineering ◽  
Concrete Structures ◽  
Earthquake Resistance ◽  
Reinforced Concrete Structures ◽  
The University ◽  
Prestressed Structures

This paper is reproduced from the proceedings of a seminar on "Seismic Problems in Structural Engineering" arranged by the Departments of Civil Engineering and Extension Studies of the University of Canterbury, and held in Christchurch from May 13 
to 16, 1968. Another paper from that seminar, also published 
in this issue of the Bulletin, discusses requirements for ductility in reinforced concrete structures. The present 
paper makes a comparison of prestressed concrete with reinforced concrete, and discusses the factors to be considered 
in the design of prestressed structures for earthquake resistance.

scholarly journals Corrosion induced deterioration in prestressed concrete structures

2021 ◽  
Author(s):  
Sorin Aslau
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
Concrete Structures ◽  
Mechanical Stresses ◽  
Reinforcing Steel ◽  
Project Report ◽  
Sudden Collapse

Corrosion is less frequent in prestressed concrete than in ordinary reinforced concrete, but when it does occur, the results can be more dangerous and more costly. In prestressed concrete structures the reinforcing steel elements are subjected to high mechanical stresses, therefore corrosion of the tendons can lead to catastrophic consequences, by the failure of the steel and consequently of structure, or part of it, with a great potential for life losses, life disruption, and a huge economical impact. One of the most dangerous aspects is that the corrosion related fracture of the steel might lead to a sudden collapse of the structure with little or no warning. The intention of this project report is to collect and synthesize information on the corrosion of the prestressing tendons as a mechanism of deterioration in prestressed concrete.

scholarly journals Corrosion induced deterioration in prestressed concrete structures

2021 ◽  
Author(s):  
Sorin Aslau
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
Concrete Structures ◽  
Mechanical Stresses ◽  
Reinforcing Steel ◽  
Project Report ◽  
Sudden Collapse

Corrosion is less frequent in prestressed concrete than in ordinary reinforced concrete, but when it does occur, the results can be more dangerous and more costly. In prestressed concrete structures the reinforcing steel elements are subjected to high mechanical stresses, therefore corrosion of the tendons can lead to catastrophic consequences, by the failure of the steel and consequently of structure, or part of it, with a great potential for life losses, life disruption, and a huge economical impact. One of the most dangerous aspects is that the corrosion related fracture of the steel might lead to a sudden collapse of the structure with little or no warning. The intention of this project report is to collect and synthesize information on the corrosion of the prestressing tendons as a mechanism of deterioration in prestressed concrete.

Experience With Blast-Furnace Slag As an Aggregate in Reinforced Concrete

CORROSION ◽  
1961 ◽  
Vol 17 (4) ◽  
pp. 155t-156t ◽  
Author(s):  
C. P. LARRABEE ◽  
S. K. COBURN
Keyword(s):  
Blast Furnace ◽  
Reinforced Concrete ◽  
Service Life ◽  
Prestressed Concrete ◽  
Blast Furnace Slag ◽  
Concrete Structures ◽  
Free Service ◽  
Furnace Slag

Abstract The role of blast-furnace slag as an aggregate in reinforced concrete is considered both in the light of present-day experience and in past erroneous reports. It was found that such slag actually is substantially inert insofar as any deleterious action toward steel is concerned. Several prestressed-concrete structures containing slag aggregate, in use for more than three years, showed every evidence of giving potentially long and trouble-free service life. 4.2.3, 6.6.5

scholarly journals Structural Safety Evaluation of Precast, Prestressed Concrete Deck Slabs Cast Using 120-MPa High-Performance Concrete with a Reinforced Joint

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3040 ◽  
Author(s):  
Jae-Hyun Bae ◽  
Hoon-Hee Hwang ◽  
Sung-Yong Park
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
High Performance ◽  
Bridge Deck ◽  
Concrete Structures ◽  
Fatigue Performance ◽  
Structural Performance ◽  
Strength Concrete ◽  
Deck Slabs ◽  
Deck Slab

Prestressed concrete structures are used in various fields as they can reduce the cross-sectional area of members compared with reinforced concrete structures. In addition, the use of high-performance and strength concrete can help reduce weight and achieve excellent durability. Recently, structures have increasingly been constructed using high-performance and strength concrete, and therefore, structural verification is required. Thus, this study experimentally evaluated the structural performance of a long-span bridge deck slab joint, regarded as the weak point of structures. The specimens were designed with a 4 m span for application to cable-stayed bridges. To ensure the required load resistance and serviceability, the specimens comprised of 120 MPa high-performance fiber-reinforced concrete and were prestressed. The deck slabs satisfied all static and fatigue performance as well as serviceability requirements, although they were thinner than typical concrete bridge deck slabs. The study also verified whether the deck slabs were suitable to help implement precast segmental construction methods. Finally, the results confirmed that the structural performance of the developed prestressed concrete (PSC) deck slab was sufficient for the intended bridge application as it achieved a sufficiently large safety factor in the static and fatigue performance tests, relative to the design requirement.

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