Non-destructive Testing of Concrete Structures in Karad Region

Wankhade, Rajan L.; Landage, Amarsinh B.

doi:10.1016/j.proeng.2013.01.005

Cited by 25 publications

(12 citation statements)

References 2 publications

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“…The assessment is based on physical deterioration as determined by measurable distress. The CI is represented by a quantitative ranking between 0 and 100, with 0 being the worst condition and 100 being the best condition (Greimnn et al 1990;Wankhade and Landage 2013). The CI scales were used to convert the physical state of the structure into quantitative values, as shown in Table 4.…”

Section: Condition Rankings/condition Index (Ci)mentioning

confidence: 99%

Seismic performance of existing water tank after condition ranking using non-destructive testing

Nayak

Thakare

2019

Int J Adv Struct Eng

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There has been a collaborative attempt to address the seismic vulnerability of existing structures in India after an earthquake in Bhuj, Gujarat, in 2001. Seismic diagnosis and seismic retrofit for the existing tanks have become a remarkable issue to be worked since deterioration is a cosmopolitan and natural phenomenon. It is important to know the exact reason for distress and type of distress. To manage such issues, a proper method of repair and rehabilitation with detailed plans and methodology is required. This paper is aimed at evolving systematic investigation metrology for condition ranking procedure based on the analytical hierarchy process (AHP) and strengthening by various retrofitting strategies. For that case study, an existing elevated water tank is considered, which was designed according to state of the art over 40 years ago as per old Indian Standard (IS) code. The ranking assessment of the elevated service reservoir was carried out using different non-destructive tests (NDTs). DER, i.e., degree (D), extent (E) and relevancy (R) rating technique was employed to find out the condition index of the elevated service reservoir (ESR). After finding the condition ranking of the existing structure, an analysis was carried out using SAP 2000 to find the present-day seismic requirements using IS codes. After knowing the seismic demand of the water tank, various retrofitting methods were adopted for improving the drift capacity and flexural capacity of the structure. The results were finally used to address some of the critical issues of the seismic response of the retrofitted structure in terms of a time period, mode shapes, base shear, displacement, acceleration, and velocity. From the case study result of seismic retrofit for the existing elevated water tank, it is confirmed that a relatively simple seismic retrofit method is effective to keep the tank functional after an earthquake.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Condition Rankings/condition Index (Ci)mentioning

confidence: 99%

Seismic performance of existing water tank after condition ranking using non-destructive testing

Nayak

Thakare

2019

Int J Adv Struct Eng

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“…These tests were verified along with destructive test techniques. Their results showed good behavior for some methods, such as pulse velocity, rebound hammer, and combined SonReb methods, and also found a relationship between dimensionless sensitivity and strength which is that sensitivity decreases with increasing strength [1].…”

Section: Introductionmentioning

confidence: 97%

“…Testing of concrete building structures in the field is required when doubts arise about the ability of building's serviceability after the following events take place: (1) errors in the process of construction work due to low-quality control; (2) extreme load on the building due to natural disasters such as earthquakes; and (3) insufficient data for evaluating purposes if the building function is to be improved. Therefore, knowledge about the residual strength of the structure is required if the building should remain functioning.…”

Section: Introductionmentioning

confidence: 99%

“…In the following sections, the application of NDT apparatus and their study objective which are related to this topic are described. Acoustic emission (AE) which uses high-frequency sound waves is most widely applied as a non-destructive evaluation testing technique as reviewed by Rens et al [1,2] based on many references. An NDT technique on high strength concrete has been done experimentally by Pascale et al [3] using velocity-based equipment type, rebound hammer, pull-out, probes penetration, micro-coring, and the combined SonReb method.…”

Section: Introductionmentioning

confidence: 99%

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Application of NDT apparatus for possible use as structural health monitoring of concrete building in the field

2018

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Abstract.A condition assessment of reinforced concrete building structures can be conducted accurately when the components of the building structure data are available. Otherwise, data must be developed through testing directly in the field. Non-Destructive Test method (NDT) was considered to avoid disruptions to the existing building structures. This study aims to develop a model for interpreting the residual strength of concrete structures in the field. Nine cylinder specimens with a diameter of 150 mm and a height of 300 mm and 27 cube specimens of 200x200x200 mm were prepared. Nine reinforced concrete beam specimens of 100x150x1100 mm were also prepared to represent a component of the reinforced concrete structure. Hammer and UPV apparatuses were applied to the cylinder and cube specimens considered. Results concluded that the value of the pulse velocity is directly proportional to the load and inversely proportional to the residual strength. The concrete structure with a residual strength of more than 60% is considered healthy or a structural in "good" condition. The concrete structure is also healthy when the v measured gives a value of 3.5 and above. This value is acceptable as it lies within the range v given in the reference of 3.5 to 4.5.

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“…Government must take necessary steps to reduce the risk to the public [9]. In order to assess the condition of an existing building, nondestructive methods can be employed which give the structural performance of the elements, without destroying the structure [10]. Ultrasonic pulse velocity test (UPV) and rebound hammer test are the frequently used methods in the NDT for assessing the strength of concrete.…”

Section: Introductionmentioning

confidence: 99%

A Geospatial Approach for the Development of Hazardous Building Zonation Mapping

Vijayakrishnan

Mandla²,

Pannem

2015

Arab J Sci Eng

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Building collapse incidents have become quite common in different parts of the world. Even though several reasons and causes have been identified for these incidents, their impact on the environment has not reduced. If proper maintenance and repair works are carried out in time, the risks may be minimized. In this study, a geospatial approach has been developed to identify the hazardous buildings with basic structural properties for municipal areas. Various thematic layers are generated on GIS platform, such as types of building, material of construction, structural defects, age of the building, and number of floors from both satellite imagery and field visit using GPS. Methodology adopted was weighted overlay approach through multi-criteria decision analysis (MCDA). Four models were developed to identify hazardous building zonation (HBZ) using expert opinions from various civil engineers. The results have been validated by conducting field tests using nondestructive testing, i.e, rebound hammer test and ultrasonic pulse velocity (UPV) test on various hazardous buildings. Hence, using geospatial tools (remote sensing, GIS, and GPS), local government and decision makers such as civil engineers and planners can identify the risk involved buildings in an area, so that suitable measures can be adopted to reduce the probable chance of failure or any damage to those buildings. B Venkata Ravibabu Mandla

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Non-destructive Testing of Concrete Structures in Karad Region

Cited by 25 publications

References 2 publications

Seismic performance of existing water tank after condition ranking using non-destructive testing

Seismic performance of existing water tank after condition ranking using non-destructive testing

Application of NDT apparatus for possible use as structural health monitoring of concrete building in the field

A Geospatial Approach for the Development of Hazardous Building Zonation Mapping

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