Haj Seiyed Taghia, S A; Darvishvand, H R and Ebrahimi, M (2020) Economic analyses for low-strength concrete wrapped with CFRP to improve the mechanical properties and seismic parameters. Journal of Construction Engineering and Management, 146(3): 04019117, ISSN 0733-9364
Abstract
One of the current approaches for retrofitting concrete is fiber-reinforced polymer (FRP) composites wrapping. As far as cost concerns, one of the issues that may raise questions using FRP is the effectiveness of this approach to improve mechanical properties and seismic parameters. For this reason, economic assessment is used to figure out the strength and weakness points of low-strength concrete retrofitting to determine the options that can provide a unique approach to achieve the objectives of the economic analysis and reduction. Therefore, the experiment was prepared to measure mechanical parameters. Three low cement content samples (75, 150, and 225 kg/m3) were made to measure the economic aspects of low-strength concrete wrapped with carbon fiber-reinforced polymers (CFRP). The samples were prepared in two different geometrical configurations: cubic and cylindrical. Specimens were tested under longitudinal compressive loading. Four types of samples were considered: zero, one, three, and five layers of CFRP wrapping. The analysis illustrates that using CFRP wrapping to improve mechanical properties and seismic parameters is more economical on those samples with higher cement content and/or strength. This outcome can be shown with only one layer of CFRP wrapping in most of our case studies. A statistical approach was used to analyze economically the effect of the number of FRP layers and the cement content on mechanical properties and seismic behavior.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | carbon fiber-reinforced polymer composite wrapping; economic analysis; low-strength concrete; mechanical properties; seismic parameters; statistical approach |
| Index terms: | retrofitting, economic analysis, configuration, mechanical property, experiment, loading, option, effectiveness, carbon fibre, case study, composite |
| Subjects: | materials science, data collection methods, construction operations, design analysis, building materials, material properties and characteristics, renovation and retrofit, performance management, systems engineering, decision analysis |
| Topics: | Design Practice, Quality Management, Site Management, Research Practice, Engineering Principles, Construction Materials, Risk Management |
| Descriptive scope: | 4 PCEA |
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