Vol. 7, No. 4, pp. 376-386 (2011)
EXPERIMENTAL AND THEORETICAL STUDY ON THE BEHAVIOR OF
THE STEEL-CONCRETE COMPOSITE BEAM WITH NOTCHED WEB OF
INVERTED T-SHAPED STEEL SECTION AT CONSTRUCTION STAGE
Guo-Qiang Li 1,2,*, Li Liang 2 and Xianhui Li 2
1 State Key Laboratory for Disaster Reduction in Civil Engineering,
Tongji University, Shanghai 200092, People’s Republic of China
2 College of Civil Engineering, Tongji University, Shanghai 200092, People’s Republic of China
*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 1 March 2011; Revised: 2 April 2011; Accepted: 12 April 2011
 View Article |
Export Citation: Plain Text | RIS | Endnote |
ABSTRACT
The behavior of the steel-concrete composite beam with notched web of inverted T-shaped steel section at construction stage is investigated in this paper. The composite beam is composed of concrete slab and inverted T-shaped steel beam, and the notched web of the steel beam is embedded in concrete slab as trapezoid shear connectors. When the strength of the concrete has not been fully developed at construction stage and the steel beam with inverted T-shaped section is likely to buckle in lateral direction. For preventing this, using cushion blocks at the bottom flange of the steel beam to support the vertical load during the construction of the composite beam is proposed. The experimental studies on four specimens are conducted to investigate the behavior of the steel beam with notched web of inverted T-shaped steel section at the construction stage. The theoretical analysis is carried out for critical buckling capacity of the composite beam with loads on single or both sides of the web and formulas for predicting the critical capacity of the beam are proposed respectively. The effectiveness of the formulas is verified by comparing the predicted results of the specimens’ tests with the results measured from tests and obtained with FEM.
KEYWORDS
Inverted T-shaped steel section, Construction stage, Trapezoid connectors, Critical buckling capacity, FEM analysis
REFERENCES
[1] Newmark, N.M., Siess, C.P. and Viest, I.M., “Test and Analysis of Composite Beams with Incomplete Interaction. Experimental Stress Analysis, 1951, Vol. 9, No. 6, pp. 896-901.
[2] Johnson, R.P., “Partial-interaction Design of Composite Beams”, The Structural Engineer, 1975, Vol. 3, No. 8, pp. 1-21.
[3] Crisinel, M., “Partial-interaction Analysis of Composite Beams with Profiled Sheeting and Non-welded Shear Connectors”, Journal of Construction Steel Research, 1990, Vol. 15, pp. 65-98.
[4] Grant, J.A. and Fisher, J.W., “Composite Beams with Formed Steel Deck”, Engineering Journal, AISC, 1977, Vol. 14, No. 1, pp. 24-43.
[5] Higgins, Christopher, “Behavior of Composite Bridge Decks with Alternative Shear Connectors”, Journal of Bridge Engineer, 2001, pp. 17-22.
[6] Galambos, T.V., “Recent Research and Design Developments in Steel and Composite Steel-concrete Structures in USA”, J. Constructional Steel Research, 2000, Vol. 55, No. 1, pp. 289-303.
[7] Roger, G. Slutter, “Flexural Strength of Steel-concrete Composite Beams”, Proceedings of ASCE, Journal of the Structural Division, 1965, Vol. 91, No. 4, pp. 71-99.
[8] Uy, B., “Application Behavior and Design of Composite Steel-concrete Beams Subjected to Combined Actions”, Proceedings of the 9th International Conference on Steel Concrete Composite and Hybrid Structures (ASCCS 2009), Leeds, UK, July 2009.
[9] Eurocode 4, “Design of Composite Steel and Concrete Structures, Part 1.1: General Rules and Rules for Buildings”, 1994.
[10] Li, X.H. and Li, G.Q., “Push-out Experimental Study on Shear Connectors in Embedded Composite Beams with Notched Web”, J. Journal of Building Structures, 2009, Vol. 30, No. 4, pp. 78-84.
[11] Li, X.H. and Li, G.Q., “Pull-out Experimental Study on Shear Connector in Embedded Composite Beams with Notched Web”, J. Journal of Architecture and Civil Engineering 2009, Vol. 26, No. 1, pp. 43-48.
[12] Li, G.Q. and Li, X.H., “Study on a Novel Steel-concrete Composite Beam”, ICASS '09 / IJSSD / IStructE Asia-Pacific Forum Sixth International Conference on Advances in Steel Structures. Nov., 2009.
[13] Cheng, J., “Stability of Steel Structures Theory and Design (2nd)”, [M] Beijing: Science Press, 2003 (in Chinese).
[14] GB50017-2003, Code for Design of Steel Structures, [S] 2003 (in Chinese).