System Reliability Evaluation of Prefabricated RC Hollow Slab Bridges Considering Hinge Joint Damage Based on Modified AHP

The prefabricated reinforced concrete (RC) hollow slab bridges, with the advantages of high quality, lower cost and shorter construction period, have been widely used for small-to-medium-span highway bridges in China. Because of environmental deterioration and traffic volume increases, the performance of the bridge system deteriorates gradually. Accurate bridge system evaluation can provide a reliable basis for maintenance and management. A bridge system is composed of multiple interrelated components, which makes the system reliability evaluation become a computationally intractable work. In this paper, an effective method was proposed to evaluate the system reliability of the prefabricated RC hollow slab bridge considering hinge joint damage based on the modified analytic hierarchy process (AHP). Considering the subjectivity of the traditional AHP method in constructing the judgment matrix, this paper proposed an objective construction method of the judgment matrix to modify the traditional AHP. The modified hinge plate method (MHPM) proposed by the previous research was utilized to analyze the effect of hinge joint damage on system reliability. In order to verify the applicability of the proposed system reliability evaluation method, a simply supported RC hollow slab bridge was selected as the case study and the system reliability indexes were compared with the traditional series and parallel methods. The results indicated that the traditional methods were either too conservative or too radical to objectively evaluate the actual system reliability level of the structure. In contrast, the proposed method in this paper was more suitable for evaluating the system reliability of such bridges, and more accurate in providing maintenance decision makers with a relatively reasonable bridge condition information.

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Study on Reliability Evaluation Method of Existing CFST Arch Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.226-228.1679 ◽

2012 ◽

Vol 226-228 ◽

pp. 1679-1682

Author(s):

Yi Song Zou ◽

Hai Tao Hou ◽

Wei Peng

Keyword(s):

System Reliability ◽

Reliability Index ◽

Evaluation Method ◽

Reliability Assessment ◽

Steel Tube ◽

Arch Bridge ◽

Cfst Arch Bridge ◽

Arch Bridges ◽

Grading Standards ◽

Bridge System

Based on reliability theory, the application calculation method of Concrete Filled Steel Tube (CFST) arch bridge system reliability index is studied. Select the most unfavorable load distribution in working condition of maximum moment and deflection at the mid-span, from the angle of strain energy, calculated the weights of CFST arch ribs component. On the basis of the grading standards of reliability assessment of the existing bridge components and the critical structures, CFST arch bridge system reliability assessment grading standards are constructed. CFST arch bridges reliability index are evaluated from two aspects (the arch ribs and segment) in this article. As the CFST arch bridge locates in the marine environment, corrosion environment is the serious level of C5-M, steel pipe corrosion is the major diseases of CFST, arch rib which on the corrosion conditions were assessed. The results show that the method can effectively assess the situation of CFST arch bridge.

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A complex system reliability evaluation method

Reliability Engineering ◽

10.1016/0143-8174(86)90083-1 ◽

1986 ◽

Vol 16 (2) ◽

pp. 163-177 ◽

Cited By ~ 7

Author(s):

Balbir S. Dhillon ◽

Subramanyam N. Rayapati

Keyword(s):

Complex System ◽

System Reliability ◽

Evaluation Method ◽

Reliability Evaluation

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The Research on Reliability of Drilling Automatic Sampling Mechanism

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.385-386.188 ◽

2013 ◽

Vol 385-386 ◽

pp. 188-191

Author(s):

Li Li Wang ◽

Yu Pang

Keyword(s):

Probability Theory ◽

Lunar Surface ◽

System Reliability ◽

Evaluation Method ◽

Reliability Evaluation ◽

Working Environment ◽

Dynamic Distribution ◽

Automatic Sampling ◽

Optimization Allocation ◽

Distribution Of Stress

This article put forward drilling mechanism reliability evaluation method on the lunar surface based on probability theory of stress-strength according to the characteristic, working environment and force condition of drilling automatic sampling mechanism on the lunar surface, ABAQUS was utilized to model and simulate the drilling automatic sampling mechanisms, and the dynamic distribution of stress of drilling automatic sampling mechanisms was obtained. According to analytic system reliability and the reliability evaluation reasonably, the optimization allocation to the use of material and system reliability can be realized.

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System Reliability Evaluation of a Bridge Structure Based on Multivariate Copulas and the AHP–EW Method That Considers Multiple Failure Criteria

Applied Sciences ◽

10.3390/app10041399 ◽

2020 ◽

Vol 10 (4) ◽

pp. 1399 ◽

Cited By ~ 1

Author(s):

Hanbing Liu ◽

Xirui Wang ◽

Guojin Tan ◽

Xin He

Keyword(s):

System Reliability ◽

Failure Modes ◽

Failure Criteria ◽

Reliability Evaluation ◽

Bridge Structure ◽

Copula Functions ◽

Entropy Weight ◽

Joint Failure ◽

Simply Supported ◽

Bridge System

The system reliability evaluation of a bridge structure is a complicated problem. Previous studies have commonly used approximate estimation methods, such as the wide bounds method and the narrow bounds method, but neither could obtain an accurate result. In recent years, the copula theory has been introduced into the system reliability evaluation, which can obtain more accurate results than the approximate methods. However, most studies simply construct binary copula functions to consider the joint failure of two failure modes. For a complex bridge structure composed of multiple components and failure modes, the joint failure of multiple failure modes needs to be considered. Before evaluating the system reliability, it is necessary to determine the failure criteria of the system. Different failure criteria for simply supported beam bridges have been proposed. However, there is no standard available to determine which failure criterion to choose, and the selection of failure criteria is ambiguous. In this paper, a novel method is proposed to evaluate the system reliability of a simply supported beam bridge by considering multiple failure criteria based on multivariate copulas and the analytic hierarchy process entropy weight (AHP–EW) method. The method first considers multiple failure criteria comprehensively and constructs multivariate copulas for the joint failure of multiple components in a bridge system reliability evaluation. The AHP–EW method is a comprehensive weighting method combining the analytic hierarchy process and entropy weight methods, which is used to establish the hierarchical analysis model between system reliability and multiple failure criteria. By considering the joint failure of multiple failure modes in the system reliability evaluation under a single failure criterion, multivariate copula functions were constructed. In order to verify the applicability of the proposed bridge system reliability method, a simply supported reinforced concrete (RC) hollow slab bridge composed of nine slab segments was selected as the numerical example. The results indicate that the method proposed in this paper could evaluate the bridge system reliability more comprehensively and reasonably.

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Reliability Evaluation of Hinged Slab Bridge Considering Hinge Joints Damage and Member Failure Credibility

Applied Sciences ◽

10.3390/app10144824 ◽

2020 ◽

Vol 10 (14) ◽

pp. 4824

Author(s):

Guojin Tan ◽

Qingwen Kong ◽

Longlin Wang ◽

Xirui Wang ◽

Hanbing Liu

Keyword(s):

System Reliability ◽

Evaluation Method ◽

Fuzzy Variable ◽

Random Variable ◽

Failure Criteria ◽

Reliability Evaluation ◽

Assessment Method ◽

Copula Theory ◽

Damage Degree ◽

First Order Second Moment

The hinged slab bridge is widely used in medium- and small-span bridges because of its simple structure and convenient construction. However, hinge joints damage is the main defect of this kind of bridge, and it is difficult to express the deterministic damage degree of hinge joints in the detection process. A system reliability evaluation method considering fuzzy detection information of hinge joints damage and member failure credibility is proposed in this paper. Firstly, the membership function is used to quantitatively express the fuzzy detection information of hinge joints, and the fuzzy variable is transformed to an equivalent random variable. Secondly, the functional relationship between the transverse distribution coefficient and hinge joints damage is constructed by the modified hinge-jointed plate method and response surface method, and the reliability of the member considering the fuzzy detection information of hinge joints damage is calculated by the first-order second-moment method (FOSM). Then, the failure credibility is introduced to represent the different possibilities of system failure caused by member failure, and a system reliability assessment method of different failure criteria considering member failure credibility is established based on copula theory. Finally, the applicability of the proposed method is verified by taking the reinforced concrete hinged slab bridge as a numerical example.

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Research on Evaluation Method of Component Software System Reliability Evaluation Results Based on Multi-Index Measurement

2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE) ◽

10.1109/qr2mse46217.2019.9021148 ◽

2019 ◽

Author(s):

Xinyu Han ◽

Longli Tang ◽

Lijin Wu ◽

Kai Zhang

Keyword(s):

System Reliability ◽

Evaluation Method ◽

Reliability Evaluation ◽

Software System ◽

Multi Index ◽

Research On Evaluation ◽

Component Software ◽

Index Measurement

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Robust Test Method of TSOP PEMs for Space Application

ISTFA 2019: Conference Proceedings from the 45th International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2019p0513 ◽

2019 ◽

Author(s):

Yasunobu Iwai ◽

Koichi Shinozaki ◽

Daiki Tanaka

Keyword(s):

Evaluation Method ◽

Low Cost ◽

Reliability Evaluation ◽

Test Method ◽

Thermal Shock Test ◽

Space Application ◽

Space Applications ◽

Limit Test ◽

Long Time ◽

Short Time

Abstract Compared with space parts, consumer parts are highly functional, low cost, compact and lightweight. Therefore, their increased usage in space applications is expected. Prior testing and evaluation on space applicability are necessary because consumer parts do not have quality guarantees for space application [1]. However, in the conventional reliability evaluation method, the test takes a long time, and the problem is that the robustness of the target sample can’t be evaluated in a short time. In this report, we apply to the latest TSOP PEM (Thin Small Outline Package Plastic Encapsulated Microcircuit) an evaluation method that combines preconditioning and HALT (Highly Accelerated Limit Test), which is a test method that causes failures in a short time under very severe environmental conditions. We show that this method can evaluate the robustness of TSOP PEMs including solder connections in a short time. In addition, the validity of this evaluation method for TSOP PEM is shown by comparing with the evaluation results of thermal shock test and life test, which are conventional reliability evaluation methods.

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