Browsing by Author "Wijekoon, C"

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item: Conference-Abstract
Life cycle costing in construction : current trends and emerging directions
(2021-07) Manewa, A; Siriwardena, M; Wijekoon, C
The current construction climate in the UK is moving forward with a much greater attention on cost certainty, sustainability and adoption of innovative technologies. The UK Construction Strategy 2025 provides a clear direction towards achieving such goals by 2025. Life Cycle Costing (LCC) is one of successful techniques for identifying the total cost of ownership in construction assets. Even though the technique has 50 years of history, the application and the diffusion of the technique within the construction domain is comparatively limited. Therefore, this study aims to investigate the evolution and current status of LCC within construction context through Bibliometric Analysis of journal publications indexed in Web of Science database (1970-2020). A series of Contents Analyses was performed and visualisation maps were generated via VOSviewer. The findings proved that LCC has been absorbed into construction in late 90’s and there is a continuous rise in the global uptake from 2013 onwards. With limited budgets and growing demand for sustainability, an integrated methodology linking LCC, Life Cycle Assessment and Performance optimisation is apparently the way forward for LCC.
item: Conference-Abstract
A solution for an unsafe ferry crossing at the Kalu Ganga: a case study at Galpatha
(Sri Lanka Society of Transport and Logistics, 2020-11) Fernando, PA; Baddewala, PK; Thabrew, DR; Wijekoon, C; Fernando, NS; Gunarathne, NH; Janujan, A; Dayarathna, H; Pathirana, DK; Gunaruwan, TL
People travelling between Galpatha, Bolossagama and its surrounding area face a challenge in crossing the Kalu Ganga using a privately operated ferry. Every year, it has been recorded that a significant number of accidents take place because of this unsafe ferry. It is particularly dangerous to use in the rainy season. This paper proposes a solution to issues faced by people who use this ferry. The issues were captured using a survey done among the users of the ferry and by interviews done with the authorized persons in the area including the Grama Niladaris. Around 50 users were interviewed while 44% of them were travelling for working purposes. The busiest times of the ferry were from 6 am - 9 am and in the evening it was 3 pm - 6 pm. In the dry season, the ferry operate smoothly. In the rainy season ferry ports are flooded and the waves are much stronger. Therefore, during such times the ferry service is unavailable. In an emergency or when the ferry is unavailable, these people have to travel an additional 22.4 km to reach the destination. There are no other ferries operating nearby. Using descriptive analysis, waiting time for the ferry, safety, and difficulties in goods transport were identified as main issues. The best solution was found to be building a bridge over the river at this point. This is one of the narrowest points along the river and is suitable for the construction of a bridge. Results derived from the gravity model showed that if a bridge is built, the volume of travel between the two villages would increase by 411.28%. There is high demand for a bridge than the ferry. If a bridge is built, for a person travelling by motorcycle, the generalized cost will reduce by 98.98% and for a person getting across by foot, the generalized cost will reduce by 92.25%. Financial Feasibility of constructing a bridge has been discussed and estimated using the Oddamavadi Bridge as the sample case. This would save the time and resources of many. It will also provide the best range of choices to users because their mobility and safety will increase.