Archives

Kalinangan Refereed Journal

Volume no. 27 | 2019/11
Issue no. 2


Title
MODAL ANALYSIS OF THE BRIDGE OF PROMISE VIA AMBIENT VIBRATION TEST (AVT)
Author
Cristobal, Kate Marielle C.; Catapang, Ron Paulo M.; Latoza, Jose D., Jr.; Marocom, Dan Michael Sean A.; Montalbo, Carmela Andrea R.; Ramos, Roselle M.; Reyna, Kristin Jerome M.; Valle, SiddArtha B., RCE; Luna, Lailanie, RCE
Views: 579 Cited: 1
Downloads: 2
Click here to download
Abstract
Batangas City’s Bridge of Promise collapsed in 2009 when Typhoon Santi hit the city. To assess the structural reliability of the Bridge of Promise after its rehabilitation, periodical inspection of the bridge was imperative to sustain its serviceability; this is done by detecting any structural damage that may require repairs. As preliminary bridge assessment, this study ascertained the soundness of the Bridge of Promise by evaluating its natural frequencies. Smartphone (iPhone) accelerometers were deployed along the deck of the bridge to record induced vibrations. Raw data were then converted into frequency-domain data using Fast Fourier Transform. Most modal natural frequencies within the bridge ranged from 1.00 Hz – 1.9 Hz. The highest natural frequency of 2.48 Hz was determined at mid span. All modes recorded were less than the maximum fundamental frequency of bridges which is 2.5 Hz. The results signified that the present natural frequencies of the Bridge of Promise comply with the standard natural frequency as verified by the DPWH.
Keywords
Batangas City, Bridge of Promise, Fast Fourier Transform, iPhone accelerometers, modal analysis
References
Billington, D. (2018). Bridge. Retrieved from http://bit.ly/2kuwJSp, November 2018.

Birtharia, A., & Jain, S. (2015). Applications of ambient vibration testing: An overview. International Research Journal of Engineering and Technology (IRJET), 2 (04):969-970.

Department of Public Works and Highways (DPWH) (2014). Bridge Engineering Inspection Manual. Retrieved from dpwh.gov.ph, April 2018.

Feng, M., Fukuda, Y., Mizuta, M., & Ozer, E. (2015). Citizen sensors for SHM: Use of accelerometer data from smartphones. Sensors, 15: 2980-2998. doi:10.3390/s150202980.

He, J. & Fu, Z. (2001). Modal Analysis. Butterworth-Heinemann Linacre House, Jordan Hill, Oxford OX2 8DP. Retrieved from http://bit.ly/2mYCucg, November 2018.

Ivanovic, S., Trifunac, M., & Todorovska, M. (2000). Ambient vibration tests of structures: A review. ISET Journal of Earthquake Technology, 37 (4): 165-197.

Kekare, A., Huddedar, P., & Bagde, R. (2014). Bridge health monitoring system. Journal of Electronics and Communication Engineering (IOSR-JECE), 9 (3):08-14.

Kim, C., Jung, D., Kim, N., & Kwon, S. (2003). Effect of vehicle weight on natural frequencies of bridges measured from traffic-induced vibration. Earthquake Engineering and Engineering Vibration, 2 (1): 109-115.

Lai, Z., Jiang, L., & Zhouet, W. (2018). An analytical study on dynamic response of multiple simply supported beam system subjected to moving loads. Shock and Vibration, 1-14.

KTH Sweden (2006). Fundamentals of sound and vibrations; vibration measurement techniques: Basics IITR-KTH MOU for course development. Retrieved from https://bit.ly/2OPn4AF, September 2018.

Neitzel, F., Resnik, B., & Weisbrich, S. (2011). Vibration Monitoring of Bridges. Berlin, Germany. Retrieved from https://bit.ly/2YZmQM2, August 2018.

Richardson, M. & Schwarz, B. (2003). Modal parameter estimation from operating data. Sound and Vibration: 1-8.