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INTEGRATION OF THE TECHNOLOGIES FOR STRUCTURAL ASSESSMENT AIDICO Construction Technological Institute Valencia - Spain 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. AIDICO
SEFDEC- PROJECT BELL TOWER CONCRETE WATER TANK DEPOSIT CABLE STAYED BRIDGE 1st MEMSCON Event 07/10/10, Bucharest AIDICO
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 –> Pre-assessment –> Analysis -> Assessment The ANALYSIS considers the following procedure: admisible threshold, Diagnostic Patterns, crack or defect pattern, expert systems, numerical analysis, technical tests,… - Analysis - Assessment The ASSESSMENTshould be attend the causes and the serious of the pathologies…and to include the recommended theraphy (usage limitation, demolition, re-integration, reinforcement,… 1st MEMSCON Event 07/10/10, Bucharest AIDICO
APPLIED TECHNOLOGIES 1st MEMSCON Event 07/10/10, Bucharest AIDICO
3D-SCANNER LASER 1st MEMSCON Event 07/10/10, Bucharest AIDICO
INFRA-RED THERMOGRAPHY 1st MEMSCON Event 07/10/10, Bucharest AIDICO
SONIC TESTING • 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 • 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. 1st MEMSCON Event 07/10/10, Bucharest AIDICO
OPERATIONAL MODAL ANALYSIS:ACCELEROMETRIC TESTS FLEXURAL 2 1,487 Hz FLEXURAL 1 2,755 Hz FLEXURAL 1 1,416 Hz MEMS1 MEMS7 MEMS2 MEMS8 MEMS3 MEM4 MEMS5 MEMS9 MEMS6 1st MEMSCON Event 07/10/10, Bucharest AIDICO
OPERATIONAL MODAL ANALYSIS: RADAR INTERFEROMETRIC 1st MEMSCON Event 07/10/10, Bucharest AIDICO
STRUCTURAL MODELLING E, , FLEXURAL MODE 1 TORSIONAL MODE FLEXURAL MODE 2 1st MEMSCON Event 07/10/10, Bucharest AIDICO
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 1st MEMSCON Event 07/10/10, Bucharest AIDICO
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 1st MEMSCON Event 07/10/10, Bucharest AIDICO
CONCLUSIONS 1st MEMSCON Event 07/10/10, Bucharest • 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. AIDICO