Development of an computational algorith for estimating cables'tensile stress on cable-stayed bridges based on experimental laboratory and job site measurements on their natural vibration modes and frequencies

Giordano Avellaneda, Ricardo Noguera, Edgar Muñoz

Abstract


In the present research, is proposed a new methodology for estimating tension forces in cables on the basis of their modes and natural frequencies of vibration, by developing a computer application leaning on the finite element method (FEM) and a detailed analysis of signals. In this paper is presented a state of the art with some of the work done around the world, a conceptual framework and a proposed methodology for its development and implementation. The computer application which was programmed in MATLAB ®, which was validated through experimental measurements on a scaled prototype and some cables of a cable stayed bridge under construction in Colombia, allows to estimate the magnitude of the cable's tension with minimal errors.

Rev. ing. constr. [online]. 2012, vol.27, n.3, pp. 155-180. ISSN 0718-5073.  http://dx.doi.org/10.4067/S0718-50732012000300004


Keywords


Natural frequencies; stress; finite elements; signals; monitoring and instrumentation.



DOI: http://dx.doi.org/10.4067/S0718-50732012000300004

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