Comparison of High-Strength Steel Pipe and H-Shaped Steel in the Strut of a Braced Wall System

• Published in: Journal of Asian architecture and building engineering 2017-01, Vol.16 (1), p.179-184
• Main Authors: Kim, Sangyong, Whang, Seoung-Wook, Lee, Young-Do, Shin, Yoonseok, Kim, Gwang-Hee
• Format: Article
• Language: English
• Subjects: braced wall system; Construction costs; Cost analysis; deep excavation; Excavation; h-shaped steel strut; high strength steel pipe strut; High strength steels; Steel pipes; Struts; System effectiveness; Urban areas
• ISSN: 1346-7581; 1347-2852
• DOI: 10.3130/jaabe.16.179

Excavation work accounts for a high percentage of the total building construction cost. The most widely used method for excavation work in an urban area is a braced wall system with struts or rakers. H-shaped steel, which is the most commonly used component for struts in braced wall systems, has disadvantages such as cost-ineffectiveness and increased work interference associated with narrow strut spacing. Therefore, the use of high-strength steel pipe struts in braced wall systems can be an effective alternative to widening the strut spacing. In this study, the construction costs of a braced wall system using H-shaped steel and a braced wall system made with high strength steel pipe were compared by analyzing the required amounts of materials and the construction costs for four practical cases. All analyzed cases considered a change from H-shaped steel to high strength steel pipe in a design change during the construction stage. The results of this study show that the required amount of materials and the construction costs of a braced wall system with high strength steel pipe were lower than those of a braced wall system with H-shaped steel. Consequently, this study suggests that a high strength steel pipe strut is a more economical alternative than an H-shaped steel strut in braced wall systems for deep excavation work.