Performance assessment on degrading concrete structures including considerations on the time variant alteration

2021 ◽  
Author(s):  
Fritz Binder ◽  
Stefan L. Burtscher ◽  
Alfred Strauss
Keyword(s):  
Prestressed Concrete ◽  
Chloride Content ◽  
Degradation Process ◽  
Analytic Hierarchy ◽  
Reliable Determination ◽  
Chloride Attack ◽  
Durability Assessment ◽  
Condition Indices ◽  
Condition State ◽  
Hierarchy Process

<p>The infrastructure of ASFiNAG is mainly built from reinforced and prestressed concrete, which despite all regular maintenance measures, is subject to ageing and degradation. The major degradation process is chloride attack, followed by carbonation, which both lead to corrosion of the reinforcing steel. In this paper chlorides in the concrete are analysed with a new method, which represents a major improvement over previous assessment. The paper also introduces a new concept for the durability assessment by using objective indicators, like chloride content, electrical resistivity, and corrosion potential. For objectivity and a reliable determination of the condition state, an overall performance index derived from the condition indices using an analytic hierarchy process (AHP) is adopted. The model is applied to excellent and dense data from a monitoring system and investigations taken from reinforced concrete components beside the motorway.</p>

scholarly journals Durability Assessment of Lightweight Cellular Concrete in Subgrade by the Method of Analytic Hierarchy Process Combined with Fuzzy Comprehensive Evaluation

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Xin Liu ◽  
Chengwei Ni ◽  
Liye Zhang ◽  
Ke Sheng ◽  
Baoning Hong
Keyword(s):  
Analytic Hierarchy Process ◽  
Influencing Factors ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Assessment Method ◽  
Assessment Model ◽  
Analytic Hierarchy ◽  
Durability Assessment ◽  
Hierarchy Process ◽  
Cellular Concrete

The durability of lightweight cellular concrete (LCC) and the corresponding assessment method are studied in this paper to improve the utilization of LCC in subgrade construction engineering. The durability assessment method is established by combining the analytic hierarchy process (AHP) with fuzzy comprehensive evaluation (FCE). The main assessment processes are as follows. Firstly, based on the physical and mechanical properties of LCC, the influencing factors are selected in terms of preliminary design, construction technology, and operation and management after completion of construction. The grading standard of influencing factors is established as well. Secondly, a multilevel assessment model with targets level, criteria level, and indexes level is established. AHP determines the effective weight of the lower level relative to the upper level. The consistency check of the judgment matrix is conducted to prove the rationality of the distribution of influencing factors’ effect weight. Thirdly, the membership function which is suitable for each influencing factor is built to calculate the membership degree. Besides, the practicality and reliability of AHP combined with FCE are demonstrated through a practical engineering case, which is the third section of a highway in Guangdong Province, China.

Prestressed Concrete Bridge Bearing Capacity Evaluation Based on Analytic Hierarchy Process and Fuzzy Evaluation Method

2011 ◽  
Vol 368-373 ◽  
pp. 2006-2010
Author(s):  
Yan Wei Li ◽  
Zhi Wei Sun ◽  
Wei Wei Song
Keyword(s):  
Analytic Hierarchy Process ◽  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Evaluation Method ◽  
Concrete Bridge ◽  
Fuzzy Evaluation ◽  
Analytic Hierarchy ◽  
Capacity Evaluation ◽  
Prestressed Concrete Bridge ◽  
Hierarchy Process

A bearing capacity evaluation model of prestressed concrete bridge is established based on analytic hierarchy process. In order to determine the bearing capacity of the existing bridge condition, fuzzy evaluation method is used to evaluate material damage degree of bridge structures, in which of experience of experts can be used sufficiently. The method is evident and useful, which can reflect the prestressed concrete bridge in service effectively, improve the existing structure model and optimize the bearing capacity of synthetic evaluation. At the same time, the result is verified reasonably by an engineering example.

scholarly journals Durability Evaluation of Reinforced Concrete Arch Bridge Based on Fuzzy Analytic Hierarchy Process Method

2015 ◽  
Vol 9 (1) ◽  
pp. 888-895 ◽  
Author(s):  
Wu Fangwen ◽  
Yang Caofang ◽  
Xue Chengfeng
Keyword(s):  
Reinforced Concrete ◽  
Analytic Hierarchy Process ◽  
Fuzzy Theory ◽  
Concrete Bridges ◽  
Assessment Model ◽  
Analytic Hierarchy ◽  
Arch Bridge ◽  
Weight Variation ◽  
Durability Assessment ◽  
Hierarchy Process

Durability damages in varying degrees occur in numerous bridges during the service stage. Most problems caused by durability damages, including insufficient carrying capacity, aging, and breakage, among others, will directly threaten the safety performance of the structure and affect its normal condition. It requires field test to inspect in detail and reassess the structure, so that proper action can be taken to maintain the structure. Based on the Analytic Hierarchy Process, this study aims to establish a durability assessment model of a reinforced concrete arch bridge through membership function by combining fuzzy theory, to solve the sensitivity of different degrees of damages on assessment result by setting weight, and to conduct durability assessment of the superstructure of reinforced concrete bridges through the application of comprehensive weight variation fuzzy assessment. Results indicate that the structure is in a good state, and the durability assessment is in good agreement with the actual situation of the bridge.

scholarly journals Security durability assessment through fuzzy analytic hierarchy process

2019 ◽  
Vol 5 ◽  
pp. e215 ◽  
Author(s):  
Alka Agrawal ◽  
Mohammad Zarour ◽  
Mamdouh Alenezi ◽  
Rajeev Kumar ◽  
Raees Ahmad Khan
Keyword(s):  
Analytic Hierarchy Process ◽  
Fuzzy Analytic Hierarchy Process ◽  
Analytic Hierarchy ◽  
Security Services ◽  
High Investment ◽  
Durability Assessment ◽  
The Impact ◽  
Software Services ◽  
Hierarchy Process ◽  
Two Alternatives

Background Security is an integral aspect of the development of quality software. Furthermore, security durability is even more imperative and in persistent demand due to high investment in recent years. To achieve the desired target of efficacious and viable durability of security services, there needs to be nodal focus on durability along with security. Unfortunately, the highly secure design of software becomes worthless because the durability of security services is not as it should be. Methods Security durability attributes have their own impact while integrating security with durability and assessment of security durability plays a crucial role during software development. Within this context, this paper estimates the security durability of the two alternatives versions of a locally developed software called version 1 and version 2. To assess the security durability, authors are using the hybrid fuzzy analytic hierarchy process decision analysis approach. Results The impact of the security durability on other attributes has been evaluated quantitatively. The result obtained contains the assessment of security durability. The study posits conclusions which are based on this result and are useful for practitioners to assess and improve the security life span of software services.

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