The strengthening of buildings structures can be seen from two levels:

1. maintenance reinforcement due to damaged.

2. strengthen the building to achieve a certain degree of anti destructive ability, such as seismic retrofitting.

Seismic retrofitting includes:

1. beam strengthening

2. column strengthening

3. slab strengthening

4. wall strengthening

5. foundation strengthening
   

Retrofitting techniques

Reinforcement method

Externally bonded FRP composite strengthening system

Externally bonded steel plate/strip

Post installed anchoring

Steel jacketing