COMPARATIVE STUDY OF RCC AND COMPOSITE STRUCTURES
- 1. PRESENTED BY: Mohammed Tajammul Ahmed (160114732029)
- 2. Contents Introduction RCC Structures About Composite Structures Components of Composite Structure Advantages Disadvantages References
- 3. Introduction Nowadays, Construction of high rise building is a basic need because of scarcity of land. Thus extension of buildings horizontally is not possible therefore they have to be extended vertically to meet the needs of the rapid population growth. Safety of human lives and property is of utmost importance and so is the economy of the structure. The structure has to be safe and economical.
- 4. RCC Structures RCC means Reinforced Cement Concrete, i.e., cement concrete reinforced with steel bars, steel mesh etc. to increase the tension withstanding capacity of the structure. Cement Concrete can take up immense compression but is weak in tension whereas steel is good in withstanding both tension and compression.
- 5. Components of RCC Structure RCC Footings RCC Columns RCC Beams RCC Slab
- 6. About Composite Structures Composite Member- Structural member consisting of steel structural units , rolled or built up and cast in-situ concrete connected together in such a manner that they act monolithically. Steel and Concrete may be arranged to produce an ideal combination of strength with steel efficient in tension and concrete in compression.
- 7. About Composite Structure 1. The concrete slab is connected to the steel beam with the help of shear connectors.
- 8. Components of Composite Structures Concrete Slab Steel Beams Composite Columns Shear Connectors
- 9. Components of Composite Structure Concrete Slab: It is an RCC Slab. RCC slab is connected to a steel beam such that it acts as a composite member.
- 10. Components of Composite Structure Composite Beams: A steel concrete composite beam consists of a steel beam, over which a reinforced concrete slab is cast with shear connectors. The composite action reduces the beam depth.
- 11. SHEAR CONNECTORS • Shear connections are very essential for steel concrete constructions. • They integrate the compression capacity of supported concrete slab with supporting steel beams to improve the load carrying capacity and overall rigidity.
- 12. Shear connectors
- 13. CRITERIA FOR DESIGN OF SHEAR CONNECTORS o To transmit longitudinal shear along the interface o To prevent separation of steel beam and concrete slab at the interface
- 14. 1. Flexible shear connectors 2. Rigid shear connectors 3. Anchorage shear connectors
- 15. Flexible shear connectors They consists of headed studs, channels or tees welded on the top flange of the steel beam They derive their stress resistance through bending and undergo large deformation before failure
- 16. Rigid shear connectors They derive their resistance from bearing pressure of concrete They sustain only a small deformation Examples: Short bars Angles T- sections
- 17. Anchorage shear connectors They resist longitudinal shear They prevent separation of steel beam and concrete slab along the interface through bond
- 18. Components of Composite Structure Composite Column: Column is conventionally a compression member in which the steel element is a structural steel section. There are two types of composite columns used in practice, which are Concrete Encased, Concrete filled.
- 20. Beam – Column Joint
- 21. Advantages • Faster to erect • Lighter • Better quality control • Reduced site time - Fast track Construction • Large column free space and amenable for alteration • Less material handling at site • Less percentage of floor area occupied by structural elements • Has better ductility and hence superior lateral load behavior; better earthquake resistance