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Steel Takeoff Spreadsheet

Steel Takeoff Spreadsheet– Sika® CarboDur® software is a user-friendly, simple and reliable design tool for sizing and selecting the necessary sections of FRP to provide bending, shear or axial loads on reinforced concrete columns or beams -enforced.

The calculation procedures used in this program are based on the ACI440.2R-08 “Guide for the design and construction of externally bonded FRP systems, for the reinforcement of concrete structures”.

Other auxiliary design methodologies have been taken from the following codes:

ACI 318-14: Building Code Requirements for Structural Concrete.
Eurocode 2: Design of concrete structures.
Once installed the software can be used for 15 days without requesting code. After this time, the software will be deactivated if the code has not been requested.

Steel Takeoff Spreadsheet

Steel Takeoff Spreadsheet

Steel Takeoff Spreadsheet

FLEXION REINFORCEMENT
Reinforced concrete elements, such as beams, slabs and columns, can be flexurally reinforced by using FRP composites adhered with specific structural adhesives on the tractioned areas, arranging with the direction of their fibers in parallel to the main stresses of traction (element axis).

The dimensioning of the FRP reinforcement in these conditions follows the principles established in ACI 318-14 and ACI 440-2R.08, Section 10.

CUTTING REINFORCEMENT
The shear reinforcement of reinforced concrete elements can be carried out by adhering external reinforcements with their main direction aligned as much as possible to the maximum tensile stresses, so that the effectiveness of the FRP is the maximum possible.

For the great majority of elements subjected to lateral loads, the main direction of the tensions in the critical areas to shear form an angle with the axis of the element of approximately 45 °, the reinforcement being able to be arranged with this orientation in those cases where it is attached to both sides of the beam.

However, in cases where full or “U” bracketing is contemplated, it is usually more practical to arrange the FRP with its main direction perpendicular to the axis of the element.

The closed or conveniently anchored zunchados are always preferable in comparison with open zunchados, since in the latter the premature takeoff of the FRP is usual; therefore, the effectiveness of the reinforcement is limited.

CONFINEMENT OF COLUMNS
The main objectives of the confinement are:

Improve the strength of concrete and its deformation capacity.
Provide a lateral confinement to the longitudinal steel reinforcement.
Limit the risk of detachment of the surface layer of the concrete.
In the case of circular columns, these objectives can be achieved through the external cladding with FRP, either continuously or in the form of discontinuous strips. In the case of rectangular columns, the confinement can be provided by reinforcements with a rectangular shape, rounding the corners of the element before application.

The software allows the calculation of columns subject to axial loads and bending moments exerted in 2 directions. Therefore, complete interaction diagrams are used in 2D and 3D instead of simplified 3-point diagrams.

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