AXIALLY COMPRESSIVE BEHAVIORS AND DESIGN EQATION OF REINFORCED CONCRETE COLUMNS HAVING ASBESTOS CEMENT PIPE AS PERMANENT FORMWORK
DOI:
https://doi.org/10.55766/sujst15926Keywords:
Reinforced concrete column, asbestos cement pipe, compressive ioadAbstract
The ebjectives of this research work are to study the behaviors and modes of failure of reinforced concrete columns using asbestos cement pipes as permanent formwork and to compare the test results with a modified EYT's design equation. The test specimens with dianeters of 0.15 and 0.20 m, height of 0.75, 2.30 and 2.80 m, and steel reinforcements of 1.5, 2.0, 2.15, 2.64, 3.53 and 3.84% of the colamn's cross sectional area were ased. The total of 46 specinens'was tested under axial compression with ed-pinned supports. From the test, it was found that the columns exhibited a linear behav oximately 80 to 91% of the ultimate compressive loads. Then, the behavior of columns the longitudinal cracks at both ends of the columns started to increase drastically. All ns were failed by the yielding of the steel reinforcement and the crushing of the as e and concrete at the end of the columns. In addition, the colunan's strength increas forcement increased and decreased as the slendermess ratio increased. Finally, the fa between the test results and the modifled EIT's design equation were obtained in the range of 3.20 to 4.48.
References
กฤษณะ เผ่าภคะ, ศุภกิจ สายประเสริฐ, และ ณัฐพล ทองขาว. (2544). เสาท่อซีเมนต์ใยหินรับแรงอัดตามแนวแกน. รายงานการวิจัยระดับปริญญาตรี มหาวิทยาลัยเทคโนโลยีสุรนารี, 60 หน้า.
มาตรฐานผลิตภัณฑ์อุตสาหกรรมเหล็กเส้นเสริมคอนกรีต : เหล็กข้ออ้อย. (2536). มอก. 24-2536. สำนักงานมาตรฐานผลิตภัณฑ์อุตสาหกรรม, กรุงเทพมหานคร, 14 หน้า.
วิศวกรรมสถานแห่งประเทศไทยในพระบรมราชูปถัมภ์. (2540). มาตรฐานสำหรับอาคารคอนกรีตเสริมเหล็กโดยวิธีหน่วยแรงใช้งาน. พิมพ์ครั้งที่ 2, กรุงเทพมหานคร, 120 หน้า.
Chung, J., Tsuda, K., and Matsui, C. (1999). High-strength concrete filled square tube columns subjected to axial loading. Proceedings of the Seventh East Asia-Pacific Conference on Structural Engineering & Construction, August 27-29, 1999, Kochi, Japan, p. 955-960.
MacGregor, J.G. (1992). Reinforced Concrete: Mechanics and Design. 2nd ed. Prentice Hall Inc., Englewood Cliffs, New Jersey, 848 p.
Mirmiran, A., and Shahaway, M. (1997). Behavior of concrete columns confined by fiber composites. ASCE J. of Structural Engineering, 123(5):583-590.
Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens. (2001). ASTM C39. American Society for Testing and Materials, West Conshohoken, Philadelphia, p. 5.
Standard Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression. (1994). ASTM C469. American Society for Testing and Materials, West Conshohoken, Philadelphia, p. 5.
Standard Test Method for Compressive Properties of Rigid Plastics. (1996). ASTM D695. American Society for Testing and Materials, West Conshohoken, Philadelphia, p. 7.
Standard Test Methods for Tension Testing of Metallic Materials. (2000). ASTM E8. American Society for Testing and Materials, West Conshohoken, Philadelphia, p. 22.
