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INTEGRATION OF THE TECHNOLOGIES FOR
STRUCTURAL ASSESSMENT
AIDICO Construction Technological Institute
Valencia - Spain
1st MEMSCON Event07/10/10, Bucharest AIDICO
CONTENTS
The important of the Investigation in the process: pathology-assessment-refurbishment.
Applied Technologies 3D Scanner-laser Infra-red Thermography Sonic Test Modal analysis. OMA
Numerical Simulation. 3D-Model. Structural Assessment.
AIDICO1st MEMSCON Event07/10/10, Bucharest
SEFDEC- PROJECT
AIDICO1st MEMSCON Event07/10/10, Bucharest
BELL TOWER
CONCRETEWATER TANK
DEPOSIT
CABLE STAYED BRIDGE
PATHOLOGIES-ASSESSMENT-REFURBISHMENT
AIDICO1st MEMSCON Event07/10/10, Bucharest
How does it plays the Investigation in the process: Pathology– Assessment- Refurbishment
Problem – Research - Intervention
- Observation CAUSES PROBLEMSPathology Study
Pathology Process
Examination –> Pre-assessment –> Analysis -> Assessment
The ANALYSIS considers the following procedure: admisible threshold, Diagnostic Patterns, crack or defect pattern, expert systems, numerical analysis, technical tests,…
The ASSESSMENT should be attend the causes and the serious of the pathologies…and to include the recommended theraphy (usage limitation, demolition, re-integration, reinforcement,…
- Analysis
- Assessment
APPLIED TECHNOLOGIES
AIDICO1st MEMSCON Event07/10/10, Bucharest
3D-SCANNER LASER
AIDICO1st MEMSCON Event07/10/10, Bucharest
INFRA-RED THERMOGRAPHY
AIDICO1st MEMSCON Event07/10/10, Bucharest
SONIC TESTING
AIDICO1st MEMSCON Event07/10/10, Bucharest
dcf res
2
Since from other parameters as the average concrete apparent density = 2,3 kg/m3, it has been calculated the elastic modulus and constants:
- Young modulus E -> Ed= 18,5 GPa- Shear or Rigidity modulus G -> Gd = 7,54 GPa
In these case, it is assumed the final modulus as the half of the dynamic that comes from the real test (sonic test), therefore it is assigned an elastic modulus
about 10 GPa, so that 9,25 GPa has been adopted.
The founded values for the velocities are the following:
- P-wave time of flight -> Tp= 820 us- P-wave velocity -> Vp = 3040 m/s- S-wave time of flight -> Tp= 1320 us- S-wave velocity -> Vs = 1811 m/s
OPERATIONAL MODAL ANALYSIS:ACCELEROMETRIC TESTS
AIDICO1st MEMSCON Event07/10/10, Bucharest
MEM4
MEMS2
MEMS6MEMS5
MEMS3
MEMS1MEMS7
MEMS8
MEMS9FLEXURAL 1
1,416 Hz
FLEXURAL 21,487 Hz
FLEXURAL 12,755 Hz
OPERATIONAL MODAL ANALYSIS: RADAR INTERFEROMETRIC
AIDICO1st MEMSCON Event07/10/10, Bucharest
STRUCTURAL MODELLING
AIDICO1st MEMSCON Event07/10/10, Bucharest
TORSIONAL MODEFLEXURAL MODE 2FLEXURAL MODE 1
E, ,
STRUCTURAL ASSESSMENT
AIDICO1st MEMSCON Event07/10/10, Bucharest
Static Analysis: EGavitational Tension: Water mass and own weight
Maximum Principal Stress : Shear tension
Minimum Principal Stress : Compression tensionE = 10 GPa Rc (compression) ~
20 MPa
Rc (shear) ~ 7.5 MPa
STRUCTURAL ASSESSMENT STRONG WIND PRESSURE
AIDICO1st MEMSCON Event07/10/10, Bucharest
WIND ACTIONS:Pressure & Suction
80 P-30 S
120 P-45 S
Compression11.5 MPa
Shear 7.3 MPa
Shear 4.3 MPaCompression
8.7 MPa
CONCLUSIONS
Nondestructive technology could be applied to gather information: To know the mechanical properties of the structural elements, To supply confident data that comes from the experimental
tests to numerical simulation, To allow comparing experimental behaviour from different
techniques (modal tests) To match the numerical simulation and experimental test
(mechanical parameters & boundary conditions). To perform structural assessment against events.
AIDICO1st MEMSCON Event07/10/10, Bucharest