Recently Completed Projects
Performance evaluation of railway bridges under increased axle loadings
- The Indian Railway had a requirement of increased freight haulage on its network, in particular, on the iron ore routes – subject the bridges to higher tractive / braking forces
- Performance evaluation of railway bridges for increased axle loadings for Southern Railway
- Steel plate girder bridge, PSC girder bridge and Arch Bridges Evaluated
- Instrumenting specific locations of the selected span of the bridge
- Exhaustive instrumentation with strain gages, LVDT’s, accelerometers for measuring various structural parameters
- Measurement of responses during defined test cases
- Data analysis and interpretation to evaluate the structural performance.
- Performance evaluation of railway bridges under increased axle loadings
Condition Assessment of Structures using load test
- Assessment of condition of the structure carried out by conducting load test
- During load test the structures was instrumented with sufficient number of strain gages to measure strain values and dial gages to measure displacement values
- Based on the investigations, the load carrying capacity is evaluated
Assessment of residual prestress in prestressed concrete structures by using concrete core trepanning technique
Assessment of residual prestress in prestressed concrete structures by using concrete core trepanning technique
- Assessment of residual prestress is essential for repairing / rehabilitation of these structures
- Concrete core trepanning technique is a powerful non-destructive technique for existing stress evaluation for in-service structures
- CSIR-SERC has developed this technique for field application and successfully applied in many bridges and infrastructure in assessing the existing level of stress / prestress
Pressure Testing of a Prestressed Concrete Containment Vessel
Demonstration of Structural behavior conforming to elastic behaviour and comparison with design prediction during proof test by applying internal pressure
Instrumentation
- Electrical resistance strain gages at selected locations
- Strain gage based displacement transducers
- Measurements During Dummy Run
- To assess the response of the structure, sensors and systems without any externally applied load, except due to diurnal variations in temperature
- Generating data for correcting the measured deflections due to proof test
- Measurements During Proof Test
- Pressure applied in 5 equal stages
- Measurement of strain and deflection during pressurisation and depressurisation
- Recovery of deflections and strains monitored for 48 hours
- Structural integrity of the containment evaluated
