Structural repair and strengthening works
The need for repair and strengthening may arise from deterioration, changes in use, changes in the relevant design codes, structural defects or seismic conditions. We use technologies to develop strategies to restore or add load-carrying capacity to bridges, buildings, and other structures.
Rehabilitation, strengthening and protection of concrete structures all require thorough investigations, clearly defined procedures, expert execution and systematic quality control. Inspects and assesses civil engineering works, buildings, bridges and industrial structures both to determine present condition and to initiate any measures found necessary for restoration to full service condition. In many cases, VSL also undertakes the project management for the rehabilitation work as a turnkey service.
Repairs and regular preventive actions serve to extend the life span of a structure, which leads to financial savings and reduced wastage of materials.
Repair, strengthening or reconfiguration can give a new life to existing or ageing structures that might otherwise be demolished and replaced
UCDC applies the post-tensioning technique mainly to improve the serviceability condition of the strengthened structure. This includes reducing the structural deflection, stresses and crack widths. The active force induced by the post-tensioning is also useful in increasing the structural capacity against ultimate conditions. The post-tensioning can be applied externally or internally using steel strands
* FRP – The main reason for applying externally bonded FRP composites is to increase structural capacity in a passive manner. FRP plates and rods are used to provide strengthening for beam/slab sagging moments while FRP rod or tape is used for the beam/slab hogging moment. FRP wrap on the columns works well to enhance load-bearing capacity
Design and build strengthening systems and services include
Passive strengthening systems – enlarging structural members , steel plate bonding , addition of carbon fiber reinforced polymer , use of steel reinforced polymer
Active strengthening systems – use of external and internal post-tensioning systems , prestressed FRP
* Concrete repair
Concrete and structural repairs including ,Crack repair , Repair of concrete honey combing, delamination and spalling , Repairs to corroded embedded metals , Concrete fireproofing repairs , Structural supports and shoring , Protective coatings and linings , Re-anchoring of prestressing tendons , reinforcement rrepair , expansion joint replacement , structural bearing replacement
