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