Reliability Analysis of Beam String Structure Considering the Failure of Key Components

2011 ◽  
Vol 243-249 ◽  
pp. 351-354
Author(s):  
Zhan Sheng Liu ◽  
Rui Long Xu
Keyword(s):  
System Reliability ◽  
Safety Assessment ◽  
Steel Structure ◽  
Structure Reliability ◽  
Reliability Calculation ◽  
Surface Method ◽  
String Structure ◽  
Prestressed Steel Structure ◽  
The Impact ◽  
Central Composite

There have been few researches on the reliability of prestressed steel structure, especially the study on the reliability considering the failure of key components. In order to study the impact of the component failure on the structure reliability, the response surface method based on central composite design is adopted and APDL language is applied to write a corresponding program, thereby carrying out reliability calculation and analysis to the model. The system reliability and parameters sensitivity of the beam string structure under different failure of components are provided. The results indicate that the impact of cable failure on the reliability is large, but it is weak by the failure of brace rod. The results may serve as a reference for the health monitoring and safety assessment of the prestressed steel structure.

Reliability Analysis of Prestressed Steel Structure in Regards to Temperature Action

2010 ◽  
Vol 97-101 ◽  
pp. 4415-4419 ◽  
Author(s):  
Zhan Sheng Liu ◽  
Zhi Hua Chen
Keyword(s):  
Expansion Coefficient ◽  
Limit State ◽  
Steel Structure ◽  
Element Model ◽  
State Equation ◽  
Linear Expansion Coefficient ◽  
String Structure ◽  
Expansion Coefficients ◽  
Prestressed Steel Structure ◽  
The Impact

In order to study the impact of various cables expansion coefficients on the reliability of the prestressed steel structure, a finite element model of the beam string structure and a limit state equation controlled by applicability have been established. The Monte Carlo method based on Latin hypercube sample is adopted and APDL language is applied to write a corresponding program, thereby carrying out reliability calculation and analysis to the model; the system reliability and parameters sensitivity of the beam string structure under different cable expansion coefficients and temperature conditions are provided. The results indicate that the change of cable expansion coefficient has a great impact on the reliability of the structure; therefore, it is necessary to give precise linear expansion coefficient for different cables.

scholarly journals Analysis of Basic Failure Scenarios of a Truss Tower in a Probabilistic Approach

2019 ◽  
Vol 9 (13) ◽  
pp. 2662 ◽  
Author(s):  
Wojciech Mochocki ◽  
Urszula Radoń
Keyword(s):  
Standard Deviation ◽  
Reliability Analysis ◽  
System Reliability ◽  
Probabilistic Approach ◽  
Random Variable ◽  
Structure Reliability ◽  
System Reliability Analysis ◽  
Steel Truss ◽  
Buckling Coefficient ◽  
The Impact

This paper concerns the system reliability analysis of steel truss towers. Due to failures of towers, the assessment of their reliability seems to be a very important problem. In the analysis, two cases are examined: when the buckling coefficient is a deterministic value and when it is a random variable. The impact of failures of single elements on the structure reliability was investigated. Calculations of the standard deviation of the capacity and reliability indexes were made using author-developed programs in the Mathematica environment.

Nonlinear Probabilistic Analysis of the Failure Pressure of NPP Shielding Plate

2016 ◽  
Vol 837 ◽  
pp. 214-221
Author(s):  
Juraj Kralik ◽  
Juraj Kralik Jr. ◽  
Maros Klabnik ◽  
Alzbeta Grmanova
Keyword(s):  
Monte Carlo ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Probabilistic Analysis ◽  
Nuclear Power ◽  
Safety Assessment ◽  
Fragility Curve ◽  
Failure Pressure ◽  
Surface Method ◽  
Central Composite

This paper describes the nonlinear probabilistic analysis of the failure pressure of the shielding plate of the reactor box of the nuclear power plant under a high internal overpressure and temperature. The scenario of the hard accident in Nuclear power plant (NPP) and the methodology of the calculation of the fragility curve of the failure overpressure using the probabilistic safety assessment PSA 2 level is presented. The fragility curve of the failure pressure was determined using 45 probabilistic simulations using the response surface method (RSM) with the Central Composite Design (CCD) for 106 Monte Carlo simulations for each model and 5 level of the overpressure.

Impact Analysis of Different Cable Types on Saddle-Shaped Cable-Net in Construction Process

2012 ◽  
Vol 479-481 ◽  
pp. 190-193
Author(s):  
Zhan Sheng Liu ◽  
Ran Zhang
Keyword(s):  
Mechanical Properties ◽  
Impact Analysis ◽  
Steel Wire ◽  
Steel Structure ◽  
Element Model ◽  
Wire Rope ◽  
Construction Process ◽  
New Type ◽  
Prestressed Steel Structure ◽  
The Impact

Cable is widely used in the actual project of prestressed steel structure for its mechanical properties can be fully used. Saddle-shaped cable net is a new type of large-span prestressed structure, but there is little study on the impact of different cable types on the mechanical properties of saddle-shaped cable net during the construction. In order to meet the thought of integration of design and construction, a finite element model of saddle-shaped cable net has been established. The four types of cables such as semi-parallel steel tendon cable, steel wire rope cable, steel strand cable and full-locked coil rope are chosen. The impact on mechanical properties of the structure was analyzed by different cable types.

Research on Simulation Credibility of Combat Capability

2013 ◽  
Vol 756-759 ◽  
pp. 1639-1642
Author(s):  
Xin Hua He ◽  
Yi Nan Ma ◽  
Qiong Wang
Keyword(s):  
System Reliability ◽  
Comprehensive Evaluation ◽  
Analysis Method ◽  
Nonlinear Characteristics ◽  
Structure Reliability ◽  
Reliability Calculation

Aiming at nonlinearity in indexes of the combat capability system, based on the comprehensive evaluation of the analysis method of system reliability calculation, improve the system of nonlinear characteristics of structure reliability expression. The method is effective using the example of operation capability of certain reconnaissance intelligence armament system.

scholarly journals Digital Twin-based Safety Evaluation of Prestressed Steel Structure

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Zhansheng Liu ◽  
Wenyan Bai ◽  
Xiuli Du ◽  
Anshan Zhang ◽  
Zezhong Xing ◽  
...  
Keyword(s):  
Safety Assessment ◽  
Safety Evaluation ◽  
Steel Structure ◽  
Steel Structures ◽  
Risk Level ◽  
Support Vector ◽  
Safety Level ◽  
Safety Risk ◽  
Digital Twin ◽  
Prestressed Steel Structure

The safety of prestressed steel structures in service has been studied widely. However, traditional safety assessment methods for prestressed steel structures involve few sample points, do not provide accurate predictions, and consume substantial human and material resources. The digital twin technology can be used to monitor the structural behavior, state, and activity of a steel structure throughout its life cycle, which is equivalent to performing a safety assessment of the structure. The purpose of this study is to establish a digital twin multidimensional model of prestressed steel structures. Based on this model, the support vector machine and prediction model are trained using the relevant structural history data, and the safety risk level of the structure is then predicted based on the measured data. Finally, a proportional reduction model of the wheel-spoke cable truss structure is used to verify the feasibility of the proposed method. The results show that digital twin technology can achieve real-time monitoring of prestressed steel structures in use and can provide timely predictions of the safety level. This represents a new method for the safety risk assessment of prestressed steel structures.

A RSM Approximation in Probabilistic Nonlinear Analysis of Fire Resistance of Technology Support Structures

2014 ◽  
Vol 969 ◽  
pp. 1-8 ◽  
Author(s):  
Juraj Králik
Keyword(s):  
Nonlinear Analysis ◽  
Fire Resistance ◽  
Steel Structure ◽  
Steel Structures ◽  
Technology Support ◽  
Influence Of Temperature ◽  
Advantages And Disadvantages ◽  
Structure Reliability ◽  
Surface Method ◽  
Fire Loads

This paper presents the methodology of the reliability analysis of the fire resistance of the steel structure of the cable way in NPP. The elastic and plastic solution of the steel structure under fire loads is discussed. The deterministic and probability analysis of the fire resistance of the steel structures are considered. The executed fire resistance analysis of the steel structures is investigated as the influence of temperature, permanent and variable loads. A Response Surface Method (RSM) for the nonlinear analysis of the fire structure reliability was used on program ANSYS. The advantages and disadvantages of the deterministic and probabilistic analysis of the fire safety are discussed.

Light Steel Structure Residence Social Benefit Analysis

2013 ◽  
Vol 671-674 ◽  
pp. 496-499 ◽  
Author(s):  
Ming Yang Wang ◽  
Yun Peng Chu ◽  
Yong Yao ◽  
Yu Ping Zhu
Keyword(s):  
Construction Industry ◽  
System Development ◽  
Social Economy ◽  
Steel Structure ◽  
Social Benefit ◽  
Living Environment ◽  
Environmental Benefits ◽  
The Social ◽  
The One ◽  
The Impact

China is a developing country, and also a quake-prone country. On the one hand is the Special national conditions that per capita energy shortage and frequent earthquakes, on the other hand is the social economy development and people's living environment requirements continue to increase, both of them raised new requirement of China’s residence system development. Light steel structure residence is energy conservation , environmental protection, safety and seismic, these unique advantages just to meet the current development of residential industry in China, so it has a good development prospect. This article start from the realistic background, around the application and development of our country’s light steel structure residence presently, mainly introduced the characteristics of light steel structure residence, the impact of construction industry, and the social benefits, environmental benefits, housing industrialization effective and comprehensive benefits it can produce.

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