Method of Placing Reinforcement in Framed Structure
In a framed structure like a building or bridge, reinforcing
bars, commonly known as rebars, are strategically placed within concrete
elements to enhance their strength and durability. The method of placing
reinforcement involves several steps:
1.
Design and Planning: Before placing
reinforcement, engineers carefully design the structure considering factors
such as load, stress distribution, and material properties. This design phase
determines the size, spacing, and layout of rebars.
2.
Preparation of Reinforcement: Reinforcement bars
are typically made of steel and come in various diameters and lengths. They may
be cut and bent to specific shapes according to the structural design
requirements.
3.
Setting Up Formwork: Formwork, or molds,
are constructed to shape the concrete as it sets. Reinforcement is placed
within these forms before concrete is poured. Formwork ensures that concrete is
poured in the desired shape and dimensions.
4.
Placing Reinforcement: Reinforcement bars
are placed in the formwork according to the structural design specifications.
This includes positioning them in the correct location, spacing, and
orientation relative to the anticipated loads and stress patterns.
5.
Tying Reinforcement: Once the rebars are
in position, they are tied together using wire or steel ties to maintain their
relative positions during the concrete pouring process. This tying ensures that
the reinforcement remains in place and properly spaced.
6.
Embedding Reinforcement: Reinforcement is
embedded within the concrete as it is poured into the formwork. The concrete
flows around the rebars, encapsulating them and forming a bond between the
steel and concrete, enhancing structural integrity.
7.
Consolidating Concrete: After pouring, the
concrete is consolidated to remove air voids and ensure proper compaction. This
can be done using vibration techniques or by manually tamping the concrete.
8.
Curing: Once the concrete
has set, it needs to be cured properly to achieve its full strength and
durability. Curing involves maintaining adequate moisture and temperature
conditions for a specified period, typically several days or weeks, depending
on the concrete mix design.
9.
Formwork Removal: After the concrete
has cured sufficiently, the formwork can be removed, revealing the reinforced
concrete structure.
1.
Quality Control: Throughout the
process, quality control measures are implemented to ensure that reinforcement
is placed correctly, concrete is properly mixed and poured, and the final
structure meets design specifications and safety standards.