| Title |
Experimental Study on the Structural Behavior of High Strength Concrete-filled Square Steel Tube Subjected to Flexural Loading |
| Authors |
Chung Kyung-Soo ; Lee Se-Jung ; Kim Woo-Jae ; Kim Jin-Ho |
| Keywords |
Concrete-filled Steel Tube ; High-strength Steel ; High-strength Concrete ; Bending Members |
| Abstract |
The concrete-filled steel tube (CFT) columns have several benefits of high load-bearing capacity, inherent ductility and toughness because of the confining effect of the steel tube on concrete and the restraining effect of the concrete on the steel tube's local buckling. Experimental data for square CFT columns made from high-strength steel (Fy>550MPa) and high-strength concrete (fck>100MPa) under loading is lacking. Therefore, the behavior of square concrete-filled steel tube members made from high-strength materials was investigated experimentally. Six full scale CFT specimens were tested monotonically. The primary test parameter was material strength (fck=80 MPa and 120 MPa; Fy=320MPa, 555MPa, 900MPa). The effects of yield stress of the steel tube and compressive strength of the filled concrete on the stiffness, strength and ductility of high-strength CFT members were studied. |