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Jaya, K. P.
- Improved Thermography Technique for Identifying Structural Elements under Ambient Conditions
Abstract Views :255 |
PDF Views:93
Authors
Affiliations
1 CSIR-Structural Engineering Research Centre, Taramani, Chennai 600 113, IN
2 Structural Engineering Division, Department of Civil Engineering, Anna University, CEG Campus, Chennai 600 025, IN
1 CSIR-Structural Engineering Research Centre, Taramani, Chennai 600 113, IN
2 Structural Engineering Division, Department of Civil Engineering, Anna University, CEG Campus, Chennai 600 025, IN
Source
Current Science, Vol 108, No 10 (2015), Pagination: 1882-1889Abstract
Infrared thermography is an interesting non-contact evaluation technique which relies on surface thermal gradient. It is used to identify dissimilarity in geometry or material property. The application of this method in civil engineering is limited, as concrete components are heavy and require large amount of heat to reveal differential thermal gradients. Hence, the present work focuses on assessing the applicability of the infrared thermography technique for civil engineering structures under ambient conditions using solar heat. For the study, the exterior frames in real structures have been chosen, wherein the reinforced concrete and masonry members are not explicitly visible to the eye. The initial studies showed that the thermograms revealed different temperature gradients corresponding to the main beams and masonry walls, thus aiding in their identification. However, when the method was extended to multi-storey framed structures, the thinner elements like lintel beams could not be identified. The application of improved thermography technique using wavelet packet analysis to two test structures showed that lintel beams could also be identified. Also, the possibility to evaluate the geometric dimensions of structural members and floor heights, using the thermogram and a reference dimension, has been studied on two test structures. The geometric dimensions could be evaluated with more than 90% accuracy.Keywords
Brick Masonry, Concrete, Infrared Thermography, Structural Element, Wavelet Packets.Full Text
- Seismic Performance of Precast Slab to Beam Connection: An Overview
Abstract Views :283 |
PDF Views:92
Authors
Affiliations
1 Division of Structural Engineering, Department of Civil Engineering, College of Engineering Guindy, Anna University, Chennai 600 025, IN
1 Division of Structural Engineering, Department of Civil Engineering, College of Engineering Guindy, Anna University, Chennai 600 025, IN
Source
Current Science, Vol 121, No 1 (2021), Pagination: 61-76Abstract
Precast construction is common across the world, but in India the level of acceptance is less, although it offers several benefits compared to the cast-in-place construction. Adopting a suitable connection for pre-cast elements is very important in providing the over-all robustness to the structure. Among all precast connections, the precast slab to beam connection is considered a vital one as the horizontal load is trans-ferred to the vertical load resisting structural elements by the diaphragm action. This article mainly focuses on the seismic performance of the precast slab to beam connections with an experimental evaluation of the basic concepts of design and detailing of the con-nections. This overview will pave way to refine work on the slab to beam connections in future research.Keywords
Connectors, Hollow Core Slabs, Precast Slab to Beam Connection, Seismic Performance.Full Text
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