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Structural Engineering and Mechanics Volume 65, Number 5, March10 2018 , pages 505-511 DOI: https://doi.org/10.12989/sem.2018.65.5.505 |
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Experiments on influence of foundation mass on dynamic characteristic of structures |
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Trung D. Pham, Hoa P. Hoang and Phuoc T. Nguyen
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| Abstract | ||
| Recently, a new foundation model called \"Dynamic foundation model\" was proposed for the dynamic analysis of structures on the foundation. This model includes a linear elastic spring, shear layer, viscous damping and the special effects of mass density parameter of foundation during vibration. However, the relationship of foundation property parameters with the experimental parameter of the influence of foundation mass also has not been established in previous research. Hence, the purpose of the paper presents a simple experimental model in order to establish relationships between foundation properties such as stiffness, depth of foundation and experimental parameter of the influence of foundation mass. The simple experimental model is described by a steel plate connected with solid rubber layer as a single degree of freedom system including an elastic spring connected with lumped mass. Based on natural circular frequencies of the experimental models determined from FFT analysis plots of the time history of acceleration data, the experimental parameter of the influence of foundation mass is obtained and the above relationships are also discussed. | ||
| Key Words | ||
| one-parameter foundation; two-parameter foundation; dynamic foundation; foundation mass; experimental model of foundation mass | ||
| Address | ||
| Trung D. Pham: Department of Civil Engineering, Mientrung University of Civil Engineering, 24 Nguyen Du St., Tuy Hoa City, Vietnam Hoa P. Hoang: Department of Construction of Bridge and Road, University of Science and Technology, The University of Danang, 54 Nguyen Luong Bang St., Danang City, Vietnam Phuoc T. Nguyen: Department of Civil Engineering, Ho Chi Minh City Open University, 97 Vo Van Tan St., Ho Chi Minh City, Vietnam | ||