🕑 Reading time: 1 minuteIn most cases the design of reinforced concrete beams and slabs is governed by deflection rather than strength. Various measures to control deflections of RCC beams and slabs are explained in this article. If these options are implemented properly, the result could be more cost effective compared to elements that either show deflections consequently require expensive rehabilitation or members which designed for unnecessary deflection response. To fully evaluate these techniques, designers need to know reinforced concrete member stress level; whether concrete member is uncracked or fully cracked. The concrete members are assumed to be fully cracked when applied moment in positive parts are larger than two times cracking moment. Furthermore, influence of options on deflection, nearly the amount of deflection reduction, and application of these techniques in proper conditions are discussed for all options. These choices are divided into three major categories includes design techniques, construction techniques, selection of materials. In this article design options for reducing deflections are discussed.
- How to Reduce Deflection of Reinforced Concrete Beams and Slabs?
How to Reduce Deflection of Reinforced Concrete Beams and Slabs?Following are the design techniques to reduce deflections of reinforced concrete beams and slabs
- Make the element deeper
- Make the member wider
- Introduce compression reinforcement
- Add tension reinforcement
- Apply or increase prestressing
- Revise geometry of the structure
- Review deflection limit criteria