Detecting Damage in Reinforced Concrete Beams Using Vibrational Characteristics
- 1 Vietnam National University Ho Chi Minh City, Ben Tre Province, Vietnam
- 2 Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh, Vietnam
- 3 Vietnam National University Ho Chi Minh City, Ben Tre Province, Vietnam
Abstract
This paper evaluates two method s of diagnosing damage, Natural frequency and Stiffness - Frequency change - Based damage detection method in reinforced concrete beams under load using vibration characteristics such as natural frequency and mode shape. The research us es finite element method with crack damage instead of deleting or reducing the bearing capacity of the element like in previous studies. First, a theor y of the damage diagnosis method based on the change of natural frequency and mode shape is presented. Next, the simulation results of reinforced concrete beams using ANSYS will be compared with the experiment. Particularly, the investigated damage cases are cracks in reinforced concrete beams under loads. Finally, we will evaluate the accuracy of the damage diagnosis methods and suggest the location of the vibration data and specify the failure threshold of the methods.
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