Safety and limit states design for reinforced concrete

1976 ◽  
Vol 3 (4) ◽  
pp. 484-513 ◽  
Author(s):  
J. G. MacGregor
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
American Concrete Institute ◽  
Building Code ◽  
Structural Safety ◽  
Reinforced Concrete Structures ◽  
Limit States ◽  
Load Factors ◽  
New Formula ◽  
State Of Art

This state-of-art paper reviews the concept of limit states design. Following a brief review of statistical definitions the sources of variability in reinforced concrete structures are reviewed. Methods of defining structural safety are reviewed. Following a derivation of the procedures used to compute load and [Formula: see text] factors, a series of [Formula: see text] factors compatible with the 1975 National Building Code of Canada load factors are computed. With the exception of the value for shear the new [Formula: see text] factors are lower than the current American Concrete Institute and Canadian Standards Association values by about the amount of the ratio of load factors in National Building Code of Canada and American Concrete Institute. The computed [Formula: see text] for shear is considerably lower than the corresponding value from the American Concrete Institute Code. An Appendix traces the development of the American Concrete Institute load and [Formula: see text] factors.

A Study for Evaluating Local Damage to RC Panels Subjected to Oblique Impact: Part 1 — A Study for Evaluating Local Damage Caused by Oblique Impact of Rigid Projectiles

2017 ◽  
Author(s):  
Yoshimi Ohta ◽  
Akemi Nishida ◽  
Haruji Tsubota ◽  
Yinsheng Li
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Oblique Impact ◽  
Reinforced Concrete Structures ◽  
Local Damage ◽  
Normal Impact ◽  
Impact Tests ◽  
Oblique Impacts ◽  
New Formula ◽  
The Impact

Many empirical formulae have been proposed to evaluate the local damage to reinforced concrete structures caused by the impact of rigid projectiles. Most of these formulae have been derived based on impact tests perpendicular to the target structures. To date, few impact tests oblique to the target structures have been conducted. The purpose of this study is to propose a new formula for evaluating the local damage caused by oblique impacts based on experiments and simulations. The new formula is derived by modifying an empirical formulation for normal impact and the agreement with results of past oblique impact tests is discussed.

Experimental Study of Concrete Class Influence on Cracks Spacing

2014 ◽  
Vol 600 ◽  
pp. 558-568
Author(s):  
Omar Zorkane ◽  
Farid Chalah ◽  
Lila Chalah-Rezgui ◽  
Abderrahim Bali ◽  
Mohamed Nadib Oudjit
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Phase Ii ◽  
Normal State ◽  
Limit State ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Limit States ◽  
Continuous Beams ◽  
Real Size

The aim of this work is to study the cracking of reinforced concrete continuous beams by considering different classes of concrete. It is well known that the design of reinforced concrete structures includes three limit states (limit state of collapse, limit state of strain and limit state of cracking). The cracks in reinforced concrete structures are admitted in the phase II (cracked sections). Thus, the phenomenon of cracks formation can be treated as a normal state only when their openings are limited to avoid a permanent risk of collapse and ensure durability for the civil engineering concrete structures. The importance of this work is described by the tests made on reinforced concrete continuous beams in real size, under concentrated loads increasing from zero up to collapse, where the concrete class influence on the cracks spacing has been studied. As this wasnt theoretically investigated, the used references for an aim comparison were relative to experimentations made by Monnier and Kuczynski on an only one concrete class to the cracks openings and the spacing evaluation analysis The findings of the research reported in this paper show that there is no effect of the concrete class on the cracks spacing.

scholarly journals Reserves and exposure assessment of reinforced concrete structures safety while reducing its power resistance

2019 ◽  
Vol 135 ◽  
pp. 03010 ◽  
Author(s):  
Ekaterina Kuzina ◽  
Vladimir Rimshin ◽  
Alexey Neverov
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Corrosion Damage ◽  
Structural Safety ◽  
Reinforced Concrete Structures ◽  
Joint Power ◽  
Engineering State ◽  
Safety Parameters ◽  
Construction Operation ◽  
Structural Solutions

Structural safety of buildings is such an engineering state of the structures operability, foundations, the features of their joint power resistance to expected loads and impacts, taking into account their possible combinations in direction, intensity and mode, which ensures the established functional use with established reliability. The structural safety of buildings depends on design, on compositional and structural solutions, technological measures during construction and operation, which must be provided at all stages of the facility’s existence (construction, operation, repair, reconstruction, dismantling and dismantling). It is necessary to take into account the structural safety parameters of reinforced concrete structures that have received corrosion damage during solving the problems of construction and reconstruction of buildings and structures. Suggestions to quantify the reserves and exposure of structural safety and, accordingly, the reduction in power resistance of corrosion-damaged reinforced concrete structures are presented in this article.

scholarly journals Analysis of Mechanical Safety of Stadiums for the World Cup 2018

2018 ◽  
pp. 118-129 ◽  
Author(s):  
Alexander M. Belostotsky ◽  
Pavel A. Akimov ◽  
Andrey A. Aul ◽  
Dmitry S. Dmitriev ◽  
Yulia N. Dyadchenko ◽  
...  
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Computer Modelling ◽  
Concrete Structures ◽  
Steel Structures ◽  
Structural Safety ◽  
Reinforced Concrete Structures ◽  
World Cup ◽  
Advanced Analysis ◽  
Football Stadiums

It is obvious that contemporary design and construction of unique buildings and structures is unthinkable without mathematical (numerical) and computer modelling and advanced analysis ofload-bearing structures under various kinds ofloads and impacts. One of the most ambitious and important construction projects is the uniquelarge-span structures. These are, in particular, stadiums, sports palaces and water parks, shopping malls, pedestrian, road and railway bridges of various design solutions. The distinctive paper is devoted to theoretical foundations and results of mathematical (numerical) modeling of the state (in terms of the analysis of stress-strain state, strength and stability) of football stadiums built for the 2018 FIFA World Cup in Russia. Finite element method is used for approximation and high-precision numerical solution of corresponding boundary problems of structural mechanics. It is the most universal and powerful numerical method of mechanics. The paper, in particular, describes some features of development of finite element models and the main results of the analysis of the mechanical (structural) safety of three- dimensionallarge-span systems "soil foundation - reinforced concrete structures of foundations and stands - steel structures of the coating and facades" of these football stadiums with the basic and specialload combinations. In addition, the key procedures of scientific support during the corresponding expertise and assessments are outlined. Generally, socially significant and knowledge-intensive problem of providing mechanical (constructive) safety of unique combined objects of construction (three-dimensional systems "foundation - reinforced concrete structures of foundations and stands - steel structures of coating and facades") has been solved at a new level as a result of the performed complex of research works.

Quality Inspection of Reinforced Concrete Structures and Reinforcement

2012 ◽  
Vol 479-481 ◽  
pp. 1036-1040
Author(s):  
Na Rui Bu ◽  
Huan Qing Cai ◽  
Run Shan Bai ◽  
Zhi Qiang Li
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Structural Safety ◽  
Reinforced Concrete Structures ◽  
Quality Inspection ◽  
Building Structures ◽  
Building Structure ◽  
Construction Work ◽  
Modern Design ◽  
Practical Engineering

In the modern design and construction of building structures, building structural safety, reliability is a top priority for construction work. In combination with practical engineering quality inspection and reinforcement methods the building structure are analyzed and presented.

Limit states for sustainable reinforced concrete structures

2019 ◽  
Vol 122 ◽  
pp. 189-195 ◽  
Author(s):  
Mette R. Geiker ◽  
Alexander Michel ◽  
Henrik Stang ◽  
Michel D. Lepech
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Limit States
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