Flexural Stiffness of Steel-Prestressed Concrete Composite Beam

An Zhou

doi:10.4028/www.scientific.net/KEM.400-402.843

Paper Titles

Full-Scale Measurements of Typhoon Effects on a Super RC Tall Building Based on a Remote Monitoring System
p.815

Contact Mechanism Analysis between Soil Structure and Underground Structures under Seismic Forces
p.821

Size Effect of Concrete Compressive Strength with Different Aggregate Composition
p.831

Size Effect of Concrete Compressive Strength with Different Reinforcement Ratio
p.837

Flexural Stiffness of Steel-Prestressed Concrete Composite Beam
p.843

A Stiff Test Facility for Obtaining Controlled Shear Failure of Reinforced Concrete Beams
p.849

Experimental Study on Shear Failure of High-Strength Concrete Beams with High-Strength Stirrups
p.857

Load-Deflection Analysis of Pretensioned Inverted T-Beam with Web Openings
p.865

Low-Cycle Fatigue Test of Circular Concrete Filled Tubular Columns
p.873

HomeKey Engineering MaterialsKey Engineering Materials Vols. 400-402Flexural Stiffness of Steel-Prestressed Concrete...

Flexural Stiffness of Steel-Prestressed Concrete Composite Beam

Abstract:

For continuous composite beams that in normal working stage, due to concrete cracks at negative moment region are restricted by transverse tendon reinforcements at the slab, it would be reasonable to consider concrete contribution to the bending capacity of such composite beams. Based on this, a variable stiffness method is proposed in this paper to calculate the composite beam deflection. Before concrete slab cracks, the flexural stiffness (the maximum value) is calculated according to the reduced transformed beam section, with the consideration of concrete contribution; After concrete cracks, this stiffness value will be decreased as per the increase of the concrete crack, and at final stage, when concrete contribution to the flexural stiffness reach zero, the stiffness value reach it’s minimum value. The loads capacity at such maximum and minimum stiffness values could be considered as the beam capacity before concrete cracking as per current code, and the elastic moment capacity after concrete cracking respectively, while the stiffness between these maximum and minimum values could be determined by linear interpolation. The bending stiffness derived from this method has a higher precision than the method presented in current China specification in which the concrete contribution is totally neglected. Especially, this procedure would be more useful for those prestressed concrete composite beams, as they have higher crack- resistance capability.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 400-402)

Pages:

843-848

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.400-402.843

Citation:

Cite this paper

Online since:

October 2008

Authors:

An Zhou

Keywords:

Composite Beam, Crack, Flexural Stiffness, Prestressed Concrete

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

References

[1] GB50017-2003. Code for design of steel structures[M]. Beijing: China Planning Press, (2003).

Google Scholar

[2] NIE Jian-guo , FAN Jian-sheng. Analysis of composite beam stiffness under negative bending. Engineering Mechanics, 2002，19（4）：33-36.

Google Scholar

[3] Eurocode 4. Design of composite steel and concrete structures. Revised draft, March (1992).

Google Scholar

[4] BS 5950-3. 1: 1990 ：Structural use of steelwork in building. Design in composite construction. Code of practice for design of simple and continuous composite beams.

DOI: 10.3403/00413147

Google Scholar

[5] China standard. JTG D62-2004. Code for design of highway reinforced concrete and prestressed concrete bridges and culverts[M]. Beijing: Traffic Press, (2004).

Google Scholar

[6] ZHOU An, DAI Hang, LIU Qiwei. Experimental study of crack-resistance and crack width in negative bending zone of interior prestressed SFRC-steel composite beams. Journal of building structures, 2007，28（3）：82-90.

Google Scholar

[7] ZHOU An, DAI Hang, LIU Qiwei. Shrinkage stress of concrete slab in steel-concrete composite beam. Journal of highway and transportation research and development, 2007，24（8）：63-66.

Google Scholar

[8] ZHOU An. study of Structural Behavior on interior prestressed steel-concrete composite beams[D]. Southeast University, (2007).

Google Scholar