Reliability Analysis of Reinforced Concrete Structural during Construction

2011 ◽  
Vol 71-78 ◽  
pp. 310-314
Author(s):  
Jun Zhao
Keyword(s):  
Reinforced Concrete ◽  
Stochastic Analysis ◽  
Reliability Index ◽  
Structural Reliability ◽  
Reinforced Concrete Structures ◽  
Time Varying ◽  
Calculation Algorithm ◽  
Random Field Theory ◽  
Reliability Calculation ◽  
Practical Engineering

According to random field theory, combined with the construction of the characteristics of reinforced concrete structures, based on the geometric significance of the reliability index, the optimization algorithm of the reliability was established, and the reliability calculation algorithm of reinforced concrete structural during construction is proposed based on stochastic finite element method. Based on a stochastic analysis of the practical engineering, the time-varying laws of the reinforced concrete structural reliability index during construction are concluded.

Research on Parameters of RC Structure Reliability

2014 ◽  
Vol 501-504 ◽  
pp. 1061-1064
Author(s):  
Bin Cai ◽  
Xin Hui Liu
Keyword(s):  
Reinforced Concrete ◽  
Structural Reliability ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Engineering Structures ◽  
Reliability Design ◽  
Structure Reliability ◽  
Rc Structure ◽  
Practical Engineering ◽  
Materials Used

In the analysis of engineering structures are usually adopt the method of fixed value, that is the practical engineering structure under load and the performance of materials used by structure shall be treated as a constant value.But, in fact, the structure of geometry size, bear the load, material parameters,computing model and so on are affected by various factors. In order to more accurately reflect the reliability problems of reinforced concrete structures, this paper, the factors above will be regarded as random variables, combining the basic theory of reliability design, through the probability analysis, in normal uselimit state reliability of reinforced concrete structures for example analysis of the influence of related parameters on the structural reliability.

Study on Relation of Structural Reliability Calculation and Fuzzy Mathematics

2011 ◽  
Vol 243-249 ◽  
pp. 5739-5744 ◽  
Author(s):  
Zhong Hua Wen ◽  
Juan Zhou ◽  
Ming Xiao Jia
Keyword(s):  
Reliability Index ◽  
Structural Reliability ◽  
Scientific Evidence ◽  
Degree Theory ◽  
Fuzzy Mathematics ◽  
Basic Variable ◽  
Statistical Parameters ◽  
Variable Source ◽  
Reliability Calculation ◽  
Source Data

Randomicity of basic variable results in the problem of structural reliability. A series of statistical parameters is applied in reliability calculation. Statistical parameters are attained by the statistics and analysis of source data of basic variable. However the basic variable source data is imperfect for a lot of structure. On the other hand, the relation of reliability index and basic variable is an important issue in reliability calculation. The two matters are solved in this paper by fuzzy mathematics. First, the matter of statistic data scarcity of load and resistibility and offered scientific evidence for estimation of distributing type of load and resistibility it solved by grey forecast; Second , the correlate degree of reliability index and load is calculated by correlate degree theory which can provide scientific evidence for security inspect of project.

scholarly journals The quality index for produced concrete and reliability in relation to the small size sample

2014 ◽  
Vol 13 (2) ◽  
pp. 135-141 ◽  
Author(s):  
Izabela Skrzypczak ◽  
Lidia Buda-Ożóg
Keyword(s):  
Reinforced Concrete ◽  
Sample Size ◽  
Reliability Index ◽  
Quality Index ◽  
Impact Analysis ◽  
Concrete Structures ◽  
Index Formula ◽  
Reinforced Concrete Structures ◽  
Concrete Quality

Compliance criteria for the sample size n = 3 have a lot of disadvantages [5,6,7] and they can affect the reduction of quality of produced concrete and, consequently,  they can cause too much risk of the recipient (the investor) side. Therefore, the effect of the sample size on the defined quality index of produced concrete has been evaluated. The effect of the sample size and standard deviation on the reliability index of reinforced concrete structures has also been determined.The impact analysis of compliance criteria on the reliability index of reinforced concrete structures was conducted for a compression column. The obtained values of the reliability index results confirm the correctness of the quality index formula and concrete quality proposed in method of defining.

Simulation of Design Reliability and Bearing Capacity of Normal and Oblique Sections of Span Prestressed Reinforced Concrete Structures

2019 ◽  
Vol 968 ◽  
pp. 267-280
Author(s):  
Olha Ahaieva ◽  
Vasyl M. Karpiuk ◽  
Oleksandr Posternak
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Software Package ◽  
Reliability Index ◽  
Optimization Problems ◽  
Concrete Structures ◽  
Design Stage ◽  
Reinforced Concrete Structures ◽  
Design Reliability ◽  
Concrete Elements

The paper studies the influence of various constructive factors on the parameters of design reliability and bearing capacity of span prestressed reinforced concrete structures. With the help of experimental design techniques and an effective software package, 12 adequate mathematical models have been developed and brought to the level of practical use. They allow to predict the reliability and bearing capacity of normal and oblique sections of specified structures for any combinations of concrete class, reinforcement class and reinforcement ratio. These models also allow to investigate both the direction of the change in bearing capacity and reliability index of prestressed reinforced concrete elements with the change of the above-mentioned factors, which is useful in solving some optimization problems at the design stage.

Device for Time-Varying Mechanical Performance of Columns under Coupling Effects of Load and Environment

2014 ◽  
Vol 578-579 ◽  
pp. 1567-1570
Author(s):  
Qiang Li ◽  
Jian Jiang ◽  
Jing Tong
Keyword(s):  
Reinforced Concrete ◽  
Mechanical Performance ◽  
Coupling Effect ◽  
Reinforced Concrete Structures ◽  
Time Varying ◽  
Measuring Instrument ◽  
Analog Device ◽  
Measuring Systems ◽  
Sustained Loading ◽  
Rebar Corrosion

To study the durability of reinforced concrete structures under coupling effect of load and environmental, an analog device is developed. Device includes sustained loading, accelerated environmental corrosion and measuring systems. The load applied to the column is real-time monitored by the pressure sensor and compensated according to the stiffness degradation and stress relaxation of column due to the rebar corrosion. Electrode is placed in the column so that the arrangement of the measuring instrument is not restricted. Device successfully realizes monitoring the time-varying mechanical performance degradation of reinforced concrete under the coupling effect of load and environment.

Non-Probabilistic Reliability Computation and Efficiency Assessment Based on Interval Model

2014 ◽  
Vol 685 ◽  
pp. 646-650
Author(s):  
Cheng Cheng Lv ◽  
Zong Zhan Gao ◽  
Feng Zhang ◽  
Tong Feng Gao
Keyword(s):  
Domain Structure ◽  
Computational Efficiency ◽  
Structural Reliability ◽  
Control Factor ◽  
Interval Model ◽  
Efficiency Assessment ◽  
Reliability Calculation ◽  
Reliability Method ◽  
Practical Engineering ◽  
Reliability Computation

A new interval non-probabilistic reliability method is proposed in this paper. The sampling control factor is introduced, which can regulate the distribution of the sampling domain structure. The efficiency of the reliability calculation is effectively improved. The numerical results prove that this method can effectively and feasibly improve the computational efficiency of structural reliability by changing the value in practical engineering calculations when is located at a suitable interval.

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.

Reliability Analysis of PC Structure in Chloride Corrosion Subjoining Cyclic Freeze-Thaw

2010 ◽  
Vol 163-167 ◽  
pp. 3301-3305
Author(s):  
Yu Chen ◽  
Rong Gui Liu ◽  
Wei Ling Zhou ◽  
Yi Duo Zhang ◽  
Tao Liu ◽  
...  
Keyword(s):  
Field Theory ◽  
Driving Force ◽  
Reliability Index ◽  
Chloride Diffusion ◽  
Structural Failure ◽  
Random Field Theory ◽  
Freeze Thaw ◽  
Chloride Corrosion ◽  
Reliability Calculation ◽  
Cover Thickness

Based on chloride diffusion and random field theory, an analytical model of PC structures in erosive environment with chloride corrosion subjoining cyclic freeze-thaw was formulated. Models presenting the influence of chloride and cyclic freeze-thaw to failure probability are used to track the structural failure. It is found that cyclic freeze-thaw could be the driving force to damage of concrete in rigidity and mechanics. The computing results show that reliability index increases with the cover thickness, and cyclic freeze-thaw increases with decrease reliability. It is important to reliability calculation whether considering cyclic freeze-thaw.

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