scholarly journals Case Study of Remaining Service Life Assessment of a Cooling Water Intake Concrete Structure in Indonesia

2014 ◽  
Vol 2014 ◽  
pp. 1-16 ◽  
Author(s):  
M. Sigit Darmawan ◽  
Ridho Bayuaji ◽  
N. A. Husin ◽  
R. B. Anugraha
Keyword(s):  
Service Life ◽  
Safety Factor ◽  
Water Intake ◽  
Concrete Structure ◽  
Cooling Water ◽  
Life Assessment ◽  
Nondestructive Tests ◽  
Remaining Service Life ◽  
Concrete Elements

This paper deals with the assessment of remaining service life of a cooling water intake concrete structure (CWICS) subjected to corrosion due to chloride attacks. Field and laboratory tests were performed to determine the current existing condition of the structure. Both destructive and nondestructive tests were employed to obtain the parameter needed for the assessment. Based on the current condition and test results, structural analysis was carried out and the remaining safety factor of CWICS was determined. From the analysis, it was found that most concrete elements of CWICS had safety factor greater than unity and might fulfil its intended service life up to the year 2033. However, fewer elements require immediate strengthening to extend their service life.

scholarly journals Prediction of remaining service life of pavement using an optimized support vector machine (case study of Semnan–Firuzkuh road)

2019 ◽  
Vol 13 (1) ◽  
pp. 188-198 ◽  
Author(s):  
Nader Karballaeezadeh ◽  
Danial Mohammadzadeh S ◽  
Shahaboddin Shamshirband ◽  
Pouria Hajikhodaverdikhan ◽  
Amir Mosavi ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Service Life ◽  
Support Vector ◽  
Remaining Service Life

scholarly journals Service-Life Assessment of Existing Precast Concrete Structure Exposed to Severe Marine Conditions

2016 ◽  
Vol 30 (3) ◽  
pp. 04015036 ◽  
Author(s):  
I. Segura ◽  
S. Cavalaro ◽  
A. de la Fuente ◽  
A. Aguado ◽  
V. Alegre
Keyword(s):  
Service Life ◽  
Concrete Structure ◽  
Precast Concrete ◽  
Life Assessment

scholarly journals Proposal of a method for service life prediction of a concrete structure: a case study

2020 ◽  
Vol 73 (3) ◽  
pp. 311-317
Author(s):  
André Barros Bolzani Petersen ◽  
Felipe Mattos Albertini ◽  
Bernardo Fonseca Tutikian
Keyword(s):  
Service Life ◽  
Concrete Structure ◽  
Life Prediction ◽  
Service Life Prediction

scholarly journals Verification of Actual Prestressing in Existing Pre-Tensioned Members

2021 ◽  
Vol 11 (13) ◽  
pp. 5971
Author(s):  
Jakub Kraľovanec ◽  
František Bahleda ◽  
Jozef Prokop ◽  
Martin Moravčík ◽  
Miroslav Neslušan
Keyword(s):  
Service Life ◽  
Prestressed Concrete ◽  
Concrete Structure ◽  
Comparative Method ◽  
Design Procedure ◽  
Experimental Program ◽  
Actual State ◽  
Prestress Losses ◽  
Remaining Service Life ◽  
Prestressing Force

In the case of prestressed concrete structures, information about the actual state of prestressing is an important basis for determining their load-carrying capacity as well as remaining service life. During the service life of the prestressed concrete structure, the initial level of prestressing is inevitably reduced as a result of the actions of various factors. These reductions of prestressing force are considered as prestress losses, which are influenced by construction stages, used materials, prestressing technology, or required length of service life. Available standards enable the determination of the expected values of prestress losses. Ultimately, their calculation is part of the design procedure of every prestressed concrete structure. However, aging and often neglected infrastructure in Europe is also exposed to factors, such as environmental distress, that are not considered in standard calculations. Therefore, verified and reliable methods for determining the actual state of prestressing are needed. This paper presents an experimental program of an indirect method for the evaluation of the value of prestressing force in seven prestressed concrete sleepers. Particularly, the non-destructive saw-cut method as a pivotal object of this study is performed and assessed. Furthermore, the Barkhausen noise technique is used as a comparative method. Subsequently, the experimental campaign is supported by the numerical analysis performed in the ATENA 3D software. Finally, the experimentally determined values of residual prestressing force are compared to the expected level of prestressing according to Eurocodes.

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