Geometric Proprties
steel reinforcement
Carbon
Interior exposure
Loading Requirements
Step 1: Initial Moment capacity and max. allowable reinforcement.
check minimum loading capacity:
check maximum allowable strengthening:
Step 2: Determine the initial strain at the soffit of the beam
Step 3: FRP system
carbon and interior exposure
Step 4: Design FRP reinforcement
assume 1 layer for initial calculations
calculate the area required for BSC
depending if the steel yeilded:
determin the number of layers
assuming full base of the beam
Step 5: configure FRP reinforcement
Step 6: calculate new moment capacity
Therefore, WSC Design
Assume steel yields:
Tension controlled state
because of tension controlled state
meets required loading capacity.
Step 7: check serviceability requirements
neutral axis of stage B of serviceability requirements
concrete stress
Does meet stress limits for concrete.
steel stress
meets stress limits for steel
FRP stress
meets stress limits for Carbon FRP