Building Strengthening with Concrete Jacketing
One primary objective of concrete jacketing is to increase load-bearing capacity and improve building seismic performance. In many projects, structural members were not designed for new loads or have lost strength over time. This method can provide the required strength without complete building demolition. In concrete strengthening projects, engineers first assess the structure, then analyze the results to determine jacket thickness, reinforcement quantity and construction details.
Conditions that increase the need for concrete jacketing include:
- Adding building stories
- Changing structural use
- Original design deficiencies
- Deterioration and reinforcement corrosion
- Earthquake damage
- Increased applied loads
- Reduced existing concrete strength
Mahtecsa’s complementary services that support concrete jacketing quality include:
Benefits of Concrete Jacketing
Concrete jacketing is one of the most widely used building strengthening methods. Its high compatibility with reinforced concrete structures makes it common in seismic rehabilitation projects.
Concrete Jacketing Design Based on Engineering Requirements
Concrete jacketing design involves more than increasing concrete thickness. Calculations must consider member dimensions, required load-bearing capacity, applied loads and overall structural behavior.
Key design parameters include:
- Changes in structural stiffness: Increasing column or beam dimensions increases member stiffness. Structural modeling must account for this to prevent stress concentrations and damage elsewhere.
- Concrete confinement: Transverse stirrups confine the concrete core and improve member ductility.
- Anchorage of longitudinal reinforcement: Longitudinal bars must be anchored into the foundation or floor slab to transfer forces correctly.
- Increased flexural and shear capacity: The main aim of jacketing is to increase member flexural strength, shear strength and load-bearing capacity.
