Alternative determination of cable forces using flexural theory of axially loaded member

Chih-Peng Yu; Chia-Chi Cheng; Chih-Hung Chiang

doi:10.1117/12.880346

19 April 2011 Alternative determination of cable forces using flexural theory of axially loaded member

Chih-Peng Yu, Chia-Chi Cheng, Chih-Hung Chiang

Proceedings Volume 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011; 79832R (2011) https://doi.org/10.1117/12.880346
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

In this study, a back calculation formula using frequencies of two arbitrary modes of vibration is proposed to compute the tension force in pre-stressed members. Derivation of the proposed formula is based on the vibration theory of an axially loaded flexural member. This paper describes the use of the proposed formula to successfully recover the tension forces of lab-controlled pre-stressing strands. Data of field tests confirm that the proposed formula is also capable of predicting cable forces of a cable-stay bridge in good agreement with those obtained from traditional first frequency calculation and those by in-situ instrumentation with errors within acceptable range. As a result, it is concluded that such calculation can also be practically useful in giving reference values for other main effective methods regardless that reliable values of the first frequency of lateral vibration is available or not.

Citation Download Citation

Chih-Peng Yu, Chia-Chi Cheng, and Chih-Hung Chiang "Alternative determination of cable forces using flexural theory of axially loaded member", Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 79832R (19 April 2011); https://doi.org/10.1117/12.880346

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