INTEGRATION OF THE TECHNOLOGIES FOR STRUCTURAL ASSESSMENT

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INTEGRATION OF THE TECHNOLOGIES FOR STRUCTURAL
ASSESSMENT

• AIDICO
• Construction Technological Institute
• Valencia - Spain

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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.

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SEFDEC- PROJECT
BELL TOWER
CONCRETE WATER TANK DEPOSIT
CABLE STAYED BRIDGE
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PATHOLOGIES-ASSESSMENT-REFURBISHMENT
How does it plays the Investigation in the
process Pathology Assessment- Refurbishment
Problem Research - Intervention
Pathology Process
- Observation
CAUSES
PROBLEMS
Pathology Study
Examination gt Pre-assessment gt Analysis -gt
Assessment
The ANALYSIS considers the following procedure
admisible threshold, Diagnostic Patterns, crack
or defect pattern, expert systems, numerical
analysis, technical tests,
- Analysis
- Assessment
The ASSESSMENT should be attend the causes and
the serious of the pathologiesand to include the
recommended theraphy (usage limitation,
demolition, re-integration, reinforcement,
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APPLIED TECHNOLOGIES
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3D-SCANNER LASER
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INFRA-RED THERMOGRAPHY
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SONIC TESTING

• The founded values for the velocities are the
  following
• - P-wave time of flight -gt Tp 820 us
• - P-wave velocity -gt Vp 3040 m/s
• S-wave time of flight -gt Tp 1320 us
• S-wave velocity -gt Vs 1811 m/s

• 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 -gt Ed 18,5 GPa
• - Shear or Rigidity modulus G -gt 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.

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OPERATIONAL MODAL ANALYSISACCELEROMETRIC TESTS
MEMS1
MEMS7
MEMS2
MEMS3
MEMS8
MEM4
MEMS5
MEMS9
MEMS6
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OPERATIONAL MODAL ANALYSIS RADAR INTERFEROMETRIC
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STRUCTURAL MODELLING
E, ?, ?
TORSIONAL MODE
FLEXURAL MODE 1
FLEXURAL MODE 2
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STRUCTURAL ASSESSMENT
Static Analysis
Gavitational Tension Water mass and own weight
?Rc (shear) 7.5 MPa
Maximum Principal Stress Shear tension
E 10 GPa
?Rc (compression) 20 MPa
Minimum Principal Stress Compression tension
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STRUCTURAL ASSESSMENT STRONG WIND PRESSURE
Compression 8.7 MPa
80 P -30 S
Shear 4.3 MPa
WIND ACTIONS Pressure Suction
Shear 7.3 MPa
Compression 11.5 MPa
120 P -45 S
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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.

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1st MEMSCON Event 07/10/10, Bucharest