International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 09 | Sep 2022
p-ISSN: 2395-0072
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LONGEVITY ASSESSMENT AND LIFE SPAN ENHANCEMENT OF CIVIL ENGINEERING STRUCTURES S. A. Rasal1, Sharayu D. Holey2 1Assistant
Professor, Dept. of Civil Engineering, Datta Meghe College of Engineering, Airoli, Navi Mumbai- 400708, Maharashtra, India 2PG Scholar, Dept. of Civil Engineering, Datta Meghe College of Engineering, Airoli, Navi Mumbai- 400708, Maharashtra, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Most of the civil engineering structures are made
and its effect on structural behaviour and serviceability of structures. In other situations, the regulations or operating conditions have changed over time. Existing structures and older must meet more stringent requirements that had been originally intended, and mainly in the case of highway bridges subjected to traffic loads that increase in intensity and frequency. In this case, the owners wanted to know if these structures are able to meet the new service requirements.
up of concrete. These structures show early signs of deterioration and distresses because of the unfavorable conditions of exposure, use of prevailing design and construction practices and other allied problems. The conventional testing practices suffer from certain limitations and hence, in view of this, new technological breakthroughs, particularly in the field of Non – Destructive Testing (NDT) methods are emerging as a powerful, valid, quality control tool for condition assessment. This paper reviews some of the prominent investigations carried on the damage detection in respect of building, bridges, roads, tunnels, and dams using various approaches, which reveals that a very little work related to the condition assessment of buildings is reported. This emphasizes the necessity of such work on the building structures and the necessity of more experimental work in order to quantify the damage from the response of the building structure using more realistic approach is also underscored.
1.2 Structural Health Monitoring Structural Health Monitoring (SHM) can have a very wide definition and be implemented in many different ways for varying motives, but all the approaches have common component classes at different levels: Sensors, Data storage, Data transmission, Database management leading to feature extraction, Data mining for feature extraction, Load/effect model development from study of data, Learning from past experience (heuristics), and Decision-making based on identified features in combination with identified models.
Key Words: Longevity assessment, Structural Health
Structural health monitoring is a common practice in condition assessment of structures to monitor the structural physical dynamic properties of the structure under NonDestructive Testing (NDT) in order to identify and locate damage at the earliest stage of development. Thus, the assessment of structural condition is not only beneficial for on-time decision making regarding maintenance, rehabilitation, and possibly replacement but also increases the overall efficiency of operation and life-span of important infrastructure. Therefore, an effort is made in the subsequent section to review some of the significant investigations carried out in the context of condition assessment of the civil engineering structures such as buildings, R.C.C framed structures, bridges, tunnels and dams in the sequential manner.
Monitoring, Non-Destructive Test (NDT), conditional assessment, damage, deterioration, structures.
1. INTRODUCTION Aging and degradation of concrete structures is an international problem which can have serious consequences on the safety of users. The unfavorable conditions of exposure, use of prevailing design and construction practices and other specific problems are some of the reasons due to which the structures start showing signs of distresses and deterioration in many civil engineering structures. As against the expected service life, structures constructed barely 2030 years ago are suffering from extensive deteriorations thus warranting regular and systematic inspection and investigations for the condition assessment.
1.3 Advantages
1.1 Conditional Assessment
The main advantage of longevity assessment is that, the ideal Longevity Assessment system provides you with ondemand information about your structure's integrity and serviceability, as well as warnings concerning any damage detected. Therefore, SHM significantly reduces repair costs through early damage detection, making the monitored
‘Condition assessment’ means the assessment of damage caused to structures including evaluation of the causes of damage, degree and amount of damage. It also includes the evaluation of the anticipated progress of damage with time
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