Damping properties of FRP cables for long-span cable-stayed bridges
- 599 Downloads
In this study, the damping properties of carbon fiber reinforced polymer (CFRP) and basalt fiber reinforced polymer (BFRP) cable potentially applied in long-span cable-stayed bridges were simulated and evaluated based on experimental data and theoretical derivations. The modal shapes were first identified according to a previous dynamic test on FRP cables, based on which the modal damping ratios of the in-plane vibration were estimated by the structural damping model of mode-dependence. Meanwhile, the modal damping ratios of the out-of-plane vibration were evaluated by the combined Rayleigh and frequency independent damping (CRFID) model. The results show that (1) the modified equation for the modal damping ratio validated by the results of in-plane vibration of the steel cable can be used for modeling the damping ratios of FRP cables, (2) the coefficients of dynamic strain damping energy of CFRP and BFRP cables were derived by backward calculating and fitting the experimental data, which can represent the damping difference among each material, and (3) the modal damping ratios of the out-of-plane modes of different stayed cables were fitted by the CRFID model and show good agreement with the test results.
KeywordsFRP cables Super long-span cable-stayed bridge Model dynamic test Dynamic strain Modal shape
The authors gratefully acknowledge the financial support provided by the National Key Basic Research Program of China, 973 Program (No. 2012CB026200), the National Science Foundation of China (NSFC, 51378109) and the National High Technology Research and Development Program of China (No. 2012AA03A204).
- 3.Ko JM, Zheng G, Chen Z, Ni Y-Q (1994) Field vibration tests of bridge stay cables incorporated with magnetorheological (MR) dampers. In: Proceedings of SPIE’s 9th annual international symposium on smart structures and materials, International Society for Optics and Photonics, pp 30–40Google Scholar
- 7.Meier U, Meier H, Kim P (1998) Anchorage device for high-performance fiber composite cables. Google PatentsGoogle Scholar
- 8.Ni Y, Ko J, Zheng G (1999) Free and forced vibration of large-diameter sagged cables taking into account bending stiffness. Adv Steel Struct 1:513–520Google Scholar
- 12.SASAKI I, NISHIZAKI I (2012) Tensile load relaxation of FRP cable system during long-term exposure tests. In: Proceedings of submitted to the 6th international conference on FRP composites in civil engineering (CICE2012)Google Scholar
- 13.Tsuji M, Kanou I (1980) Damping of wire ropes. In: Proceedings of 13 th annual conference of construction consultant association, pp 73–86Google Scholar
- 23.Wu Z, Wang X, Wu G (2010) Basalt FRP composite as reinforcements in infrastructure. In: Proceedings of 17th annual international conference on composites nano engineering (ICCE-17)Google Scholar
- 24.Xie X, Nakamura H, Maeda K, Zhang Z-C, Enomoto T (2010) Theoretical analysis and experimental test on damping characteristics of CFRP stay cables. Eng Mech 3:034Google Scholar
- 25.Xie X, Zhang H, Yonggang S (2008) Study on characteristics of modal damping of steel and CFRP stay cables. Eng Mech 25(3):151–157Google Scholar
- 26.Yamaguchi H, Fujino Y (1987) Modal damping of flexural oscillation in suspended cables. Struct Eng 4(2):413–421Google Scholar
- 30.Zhang X, Chen A (2010) Kilometer-scale cable stayed bridge-structural system, performance and design, vol 6. China Communication Press, BeijingGoogle Scholar