VIBRATION SYSTEM IDENTIFICATION, DAMAGE DETECTION, FULL SCALE SEISMIC AND GRAVITY LOAD TESTS
Vibration System Identification, Damage Detection, Full Scale Seismic and Gravity Load Tests
System Identification and Damage detection using Vibration tests.
Vibration analysis to find the frequency and mode shapes.
The pictures show the tested building.
Pictures show the load test method.
Type of the prefabricated frame in a high seismic risk area with prefabricated connections.
The lateral load simulation jack in the lab.
The pictures do not reflect a specific project; details are confidential.
Description: This firm has delivered this special method of inspection for some special structures. This firm has a patent on this method of inspection under the following topic:
“Invented by Dr. Amin Ghafooripour – VBIM (Vibration Based Inspection and Damage Detection Method for Structures using System Identification Methods)”
Ambient vibration test method to measure the system’s input and output vibrations.
Forced vibration test method to measure the system’s input and output vibrations.
System identification analysis method using advanced written codes by this firm to identify the modal shapes and changes of the mode shape and frequencies as a non-stationary process.
Damage detection using the method invented by this firm.
Vibration analysis to find the frequency and mode shapes.
This firm has used the full-scale test method with the following procedure for the highrise building to investigate the excess deflection of the post-tension slab.
The following services are delivered for the full-scale gravity load test on a structure:
A full load test was conducted on the post-tension slabs due to unusual slab deflection to determine the level of the deflection and compare it with the expected values in the theory and design requirements. These kinds of tests can show the reason for the damage or unusual behavior of the structure.
The slab deformation is measured using a total station laser to identify the existing condition.
We deliver a computer finite element method of simulation to compare the test data and measurements,
and identify the damage and the reason for the damage.
This firm has used the full-scale seismic lateral loading test in the lab to investigate the seismic performance of the prefabricated beam-to-column connection in a reinforced concrete structure and determine the structural ductility (R-factor).
A full load test was conducted on the beam-column prefab connection to determine the ductility of the connection and identify the behavior.
The tested structure for the seismic lateral forces.
Full scale lab model for the seismic lateral test.
The finite element model simulated the structural system, and the simulation results were compared
with lab test data to assess performance and damage, or to estimate the system’s ductility.
Type of order: Full scope structural analysis and inspection for the identification of the structural behavior, damages, or determination of the response modification factor/structural ductility.
Owner/Client: Private Owners
Lead Engineer: Dr. Amin Ghafooripour, PE
Location and details: International: Persian Gulf and Kish Island
