Using Multiple Attribute Value Technique for the Selection of Structural Frame Material to Achieve Sustainability and Constructability

Abstract

© 2016 American Society of Civil Engineers.Selecting appropriate structural materials to meet economic sustainability, environmental sustainability, and constructability performance can be a challenge as these parameters are not mutually exclusive. This study therefore aims to build a model for the selection of structural frame material that integrates economic sustainability, environmental sustainability, and constructability considerations. The research method is through a detailed investigation of 39 construction projects. Data were collected from archival records and interviews with 148 project participants. From the data, importance weights and performance levels of two structural materials - reinforced concrete (RC) and structural steel (SS) - are determined. It is found that SS-framed buildings outperform RC-framed buildings in the aspects of environmental sustainability and constructability, while RC-framed buildings have better economic performance. Furthermore, environmental sustainability and constructability performance are perceived to be of significantly lower importance than economic sustainability. Using the multiattribute value technique, a model to assist in the selection of structural material was constructed and tested. The major contribution of this paper is the development of a mathematical model that calculates the structural frame material (SFM) score based on an integrated consideration of economic sustainability, environmental sustainability, and constructability. The model is recommended to clients and designers to assist in the selection of structural frame materials in the concept and preliminary design stage.