Vasantha Ramani

Vasantha Ramani
École Polytechnique Fédérale de Lausanne | EPFL

Doctor of Philosophy

About

14
Publications
1,428
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60
Citations

Publications

Publications (14)
Article
Full-text available
This paper describes a dataset collected by infrared thermography, a non-contact, non-intrusive technique to acquire data and analyze the built environment in various aspects. While most studies focus on the city and building scales, an observatory installed on a rooftop provides high temporal and spatial resolution observations with dynamic intera...
Preprint
Full-text available
The paper describes a dataset that was collected by infrared thermography, which is a non-contact, non-intrusive technique to collect data and analyze the built environment in various aspects. While most studies focus on the city and building scales, the rooftop observatory provides high temporal and spatial resolution observations with dynamic int...
Preprint
Full-text available
This work presents a study on the characterization of the air-conditioning (AC) usage pattern of non-residential buildings from thermal images collected from an urban-scale infrared (IR) observatory. To achieve this first, an image processing scheme, for cleaning and extraction of the temperature time series from the thermal images is implemented....
Article
This paper presents the effect of climate change on the long-term reliability of concrete structures due to chloride ingress. The impact has been demonstrated for three regions across the globe for the best and worst-case climate change scenarios. The methodology adopted here can be divided into three main steps. The first one is the development of...
Preprint
Full-text available
This paper studies heat fluxes from contributors and mitigators of urban heat islands using thermal images and weather data. Thermal images were collected from an observatory operating on the rooftop of a building between November 2021 and April 2022. Over the same period, an automatic weather station network was used to measure weather conditions...
Article
This paper presents a framework for segmentation of imaging probe corrosion sensor data using a deep learning algorithm and estimation of the remaining service life of the structure using the segmented data. The sensor consists of a sacrificial metal foil that is imaged using the optical probe and the changes in the images as corrosion develops can...
Article
Corrosion of reinforcement in concrete is one of the major causes for deterioration of concrete structures. This work presents an approach in the monitoring of concrete structures for damage induced by corrosion of steel in concrete using a lens-based plastic optical fiber (LPOF) strain sensor. The optical fiber sensor offers the advantage of being...
Article
This paper presents a novel sensor for monitoring concrete surrounding the rebar for chlorides ingress, which is one the main precursors for rebar corrosion. The sensor consists of an optical probe housing a camera and electrical units. It also consists of a sacrificial metal foil, which is representative of the rebar material. The thickness range...
Article
Full-text available
One of the key parameters monitored in structural health monitoring applications is strain. In this work an extrinsic plastic optical fiber (POF) sensor developed previously has been optimised to increase its strain sensitivity. The extrinsic POF sensor basic design used here and previously comprises of two fiber units. As the distance of separatio...

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