Welcome to RDL software
RDL software sheds light on science by offering different software opportunities in the field of engineering.
Many software programs have been developed by academicians who are experts in their field.
IDEALIZE MONOTONIC LOAD-DISPLACEMENT CURVE
- This software uses the energy equivalence method to idealize the load-displacement curves obtained from monotonic loading tests.
- Experimentally obtained load-displacement and moment-curvatures curves are idealized by the methods described in Figure 1 (please see guideline). In Figure 1, the area under the bilinear curve is equated to the actual “experimental” curve, and the area of the hatched region A1+A2 is equal to the area of the hatched region A3”.
Once the load-displacement curves are idealized, the test results are summarized for:
- Yield strength: Yield strength is determined by using energy equivalence method and shown as fy.
- · Displacement at yield strength: Displacement at yield strength is obtained from corresponding yield strength and shown as ∆y.
- Ultimate strength: Ultimate strength is determined by using energy equivalence method and shown as fu. It should be noted that ultimate load is defined as 85% of the maximum load.
- Displacement at ultimate strength: Displacement at ultimate strength is obtained from corresponding ultimate strength and shown as ∆u.
- Initial stiffness: Initial stiffness is determined dividing the yield strength by the displacement at yield strength and shown as k1.
- Secondary stiffness: Secondary stiffness is determined by dividing the difference between the ultimate load and the yield load by the corresponding displacement differences and shown as k2.
- Displacement ductility ratio: Displacement ductility ratio is determined by dividing the ultimate displacement to yielding displacement and shown as μD=∆u/(∆y).
- Ductility index: The energy-based ductility index is determined as the ratio of the cumulative energy dissipation to the cumulative dissipated energy at the yield strength and shown as μE=Eu/Ey.
- Cumulative energy dissipation capacity: Dissipated energy capacities are determined by integrating the area under the load–displacement curves and shown as E.
IDEALIZE CYCLIC LOAD-DISPLACEMENT CURVE
2 METHODS TO IDEALIZE MOMENT-CURVATURE RELATIONSHIPS
Energy equivalence method
Energy equivalence method
Energy equivalence method
Energy equivalence method to idealize the moment-curvature curves obtained from monotonic loading tests.
Bilinear idealization
Energy equivalence method
Energy equivalence method
Bilinear idealization to idealize the moment-curvature curves obtained from monotonic loading tests.
RDL FREE SOFTWARES
Energy equivalence method
RDL FREE SOFTWARES
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Bond-Slip Relationships
Thanks to this software, bond-slip relations between concrete and reinforcement bars can be determined by using experimental strain values obtained from loading tests and tensile reinforcement bars.
Development length
This software can also determine the experimental actual bond length for the calculations of bond-slip relationships.
User defined development length
Users will be able to take into account the theoretical bond length for their calculations.
Update
In December 2025, the software will be made ready for monotonic loading and will be offered for free.
