* There was a nominal increase in the peak load of the tube beam of approximately 3%
 compare to the control beam. The load increase was considered minor.

* The displacement ductility of the beam utilizing the CFRP grid tubes was improved
 by 17% compared to the control beam with no grid tubes. This was due to concrete
 confinement provided by the CFRP grid.

* The curvature ductility of the beam utilizing the CFRP grid tubes was improved by
 27% compared to the control beam with no grid tubes.

* The average improvement in the ductility of the tube beam was significant,
 approximately 25% increase, considering the small amount of CFRP that was used to
 confine the compression zone.

* The energy dissipation of the tube beam was 37% higher compared to the controlled
 beam due to the effect of concrete confinement. This increase in the energy
 dissipation of the element also represents an improvement in the ductility due to
 concrete confinement from the CFRP grid tubes.

* The beam model used predicted the capacity and behavior of the beams. The
 difference between the experimental and predicted peak loads was 2%. The beam
 model was also accurate in predicting strains in both the concrete and the steel. The
 difference between the experimental and theoretical strains was less than 20% with
 the exception of the lower loads (22 and 46 kips) of the tube beam that the difference
 tended to be approximately 36%.

 Based on the test observations and data presented in this chapter the following

recommendations are offered:

* This technique could potentially be used in cases were dimensional restrictions
 prevent the design of concrete structural elements according to the relevant codes.
 The CFRP grid tubes can potentially improve the ductility to the extent that the
 structural element meets the requirements and specifications of the relevant structural
 code.

* Cover concrete to the CFRP grid tubes should be kept to a minimum to minimize the
 loss of capacity to the beams when the unconfined cover concrete crushes.

* If the option to assign different concrete properties to different sections of a concrete
 structural element is added to the theoretical M-0 program it could became a very
 helpful tool in design and prediction of structural behavior of carbon reinforced
 concrete elements that use CFRP grid confinement.