Composite Steel beam cont over support
Composite Steel beam cont over support
(OP)
Hi all,
I was wondering if anyone could provide me with a good reference example on design of composite steel beam continuous over support.
Thanks in advance.
I was wondering if anyone could provide me with a good reference example on design of composite steel beam continuous over support.
Thanks in advance.






RE: Composite Steel beam cont over support
Beams, slabs, columns, and frames for buildings
Third Edition
R.P. JOHNSON
Blackwell Publishing 2004
4.6 Example: continuous composite beam
DESIGNERS’ GUIDES TO THE EUROCODES
DESIGNERS’ GUIDE TO EN 1994-1-1 EUROCODE 4: DESIGN OF COMPOSITE STEEL AND CONCRETE STRUCTURES PART 1.1: GENERAL RULES AND RULES FOR BUILDINGS
Example 9.1: two-span continuous composite slab
Elementary Behaviour of Composite Steel and Concrete Structural Members
Deric J. Oehlers
Mark A. Bradford
Butterworth-Heinemann 1999
Chapter 12 Rigid plastic analysis of continuous composite beams
has examples on it.
The reference I am giving today in other composite questions
Structural Steelwork Eurocodes Development of A Trans-national Approach
also has a Chapter 7 on continuous composite beams but lacks example. It however points to probable derivations to floor vibrations checks that can be quite necessary for some cases and opens a new breadth of literature for the question.
RE: Composite Steel beam cont over support
1) Positive moment capacity is based on composite section.
2) Negative moment capacity is based on steel beam only. Though there may be something in there about being able to take advantage of the reinforcement in the slab.
3) Stiffness of the member would be based on a weighted average of the composite section and the steel only section. Based on how much of the beam is in negative bending and how much was in positive bending.
There are probably other, more exact ways of analyzing these beams. But, this method seems straight forward enough that it might actually be useful for us folks without PhD's....
RE: Composite Steel beam cont over support
RE: Composite Steel beam cont over support
RE: Composite Steel beam cont over support
RE: Composite Steel beam cont over support
Reinforcement parallel to the span of the beam in regions of negative bending moment of the composite beam shall be anchored by embedment in concrete that is in compression.
Taking that clause literally, you cannot anchor the bars in the cantilever in concrete that is in compression. Personally, I would think it would by valid to use the bars within the effective width of the composite beam flange as contributing to the steel beam section.
BA