Life cycle analysis of structural systems of residential housing units in the Philippines

In designing a house, or any structure, there are three things commonly considered by the structural engineer; these are represented in the safety-serviceability-cost triangle. Safety and serviceability ensure that the structure can fulfill its intended purpose by satisfying code requirements on str...

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Main Authors: Arcilla, Nicolas Ryan D., Ong, Janelle Kathryn P.
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Language:English
Published: Animo Repository 2013
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Online Access:https://animorepository.dlsu.edu.ph/etd_bachelors/12184
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Institution: De La Salle University
Language: English
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spelling oai:animorepository.dlsu.edu.ph:etd_bachelors-128292021-09-20T07:23:53Z Life cycle analysis of structural systems of residential housing units in the Philippines Arcilla, Nicolas Ryan D. Ong, Janelle Kathryn P. In designing a house, or any structure, there are three things commonly considered by the structural engineer; these are represented in the safety-serviceability-cost triangle. Safety and serviceability ensure that the structure can fulfill its intended purpose by satisfying code requirements on strength, ductility, and deflections. Addressing economy, on the other hand, requires value engineering to produce an optimum design with reasonable cost. However, the triangle is increasingly found to be incomplete. There is the question of environmental impacts the structure may bear on society. But what parameter may be used to guide structural designers to make their structure 2greener3? This paper proposes the use of a 2Structural Sustainability Index (SSI)3, a single-score based on the life Cycle Assessment (LCA) framework. The SSI was derived from five environmental impacts, whose respective weights were determined from a survey of Civil Engineering professionals. The impacts and their weights are: Global Warming Potential (36%), Ocean acidification (10%), Human Toxicity (12%), Abiotic Materal Depletion (16%), and Energy Use (26%). The concept was applied to low-cost housing units in the Philippines. Four models with approximately 60 sq.m. floor area were investigated. The structural systems of these houses are conventional reinforced concrete modular block system, I beam, and modified system. Among the four, the I beam house incurred the lowest SSI of 0.682 while the conventional had the greatest at 0.986. The I beam, however, was found to have the largest contribution in abiotic material depletion due to heavy steel usage. This could be lessened through recycling of steel, as the manufacturing stage was found to contribute the most damage. Significant improvements were made in all impact categories when converting from a conventional to a modified system using T-joints and wall stiffeners, for a total of 9.87% decrease in SSI. Costs likewise decreased. With the SSI and LCA framework, sustainability concerns can be quantified by structural engineers and significant improvements can be made in designing. 2013-01-01T08:00:00Z text https://animorepository.dlsu.edu.ph/etd_bachelors/12184 Bachelor's Theses English Animo Repository Structural analysis (Engineering) Sustainable buildings—Design and construction
institution De La Salle University
building De La Salle University Library
continent Asia
country Philippines
Philippines
content_provider De La Salle University Library
collection DLSU Institutional Repository
language English
topic Structural analysis (Engineering)
Sustainable buildings—Design and construction
spellingShingle Structural analysis (Engineering)
Sustainable buildings—Design and construction
Arcilla, Nicolas Ryan D.
Ong, Janelle Kathryn P.
Life cycle analysis of structural systems of residential housing units in the Philippines
description In designing a house, or any structure, there are three things commonly considered by the structural engineer; these are represented in the safety-serviceability-cost triangle. Safety and serviceability ensure that the structure can fulfill its intended purpose by satisfying code requirements on strength, ductility, and deflections. Addressing economy, on the other hand, requires value engineering to produce an optimum design with reasonable cost. However, the triangle is increasingly found to be incomplete. There is the question of environmental impacts the structure may bear on society. But what parameter may be used to guide structural designers to make their structure 2greener3? This paper proposes the use of a 2Structural Sustainability Index (SSI)3, a single-score based on the life Cycle Assessment (LCA) framework. The SSI was derived from five environmental impacts, whose respective weights were determined from a survey of Civil Engineering professionals. The impacts and their weights are: Global Warming Potential (36%), Ocean acidification (10%), Human Toxicity (12%), Abiotic Materal Depletion (16%), and Energy Use (26%). The concept was applied to low-cost housing units in the Philippines. Four models with approximately 60 sq.m. floor area were investigated. The structural systems of these houses are conventional reinforced concrete modular block system, I beam, and modified system. Among the four, the I beam house incurred the lowest SSI of 0.682 while the conventional had the greatest at 0.986. The I beam, however, was found to have the largest contribution in abiotic material depletion due to heavy steel usage. This could be lessened through recycling of steel, as the manufacturing stage was found to contribute the most damage. Significant improvements were made in all impact categories when converting from a conventional to a modified system using T-joints and wall stiffeners, for a total of 9.87% decrease in SSI. Costs likewise decreased. With the SSI and LCA framework, sustainability concerns can be quantified by structural engineers and significant improvements can be made in designing.
format text
author Arcilla, Nicolas Ryan D.
Ong, Janelle Kathryn P.
author_facet Arcilla, Nicolas Ryan D.
Ong, Janelle Kathryn P.
author_sort Arcilla, Nicolas Ryan D.
title Life cycle analysis of structural systems of residential housing units in the Philippines
title_short Life cycle analysis of structural systems of residential housing units in the Philippines
title_full Life cycle analysis of structural systems of residential housing units in the Philippines
title_fullStr Life cycle analysis of structural systems of residential housing units in the Philippines
title_full_unstemmed Life cycle analysis of structural systems of residential housing units in the Philippines
title_sort life cycle analysis of structural systems of residential housing units in the philippines
publisher Animo Repository
publishDate 2013
url https://animorepository.dlsu.edu.ph/etd_bachelors/12184
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