Experimental Study of the Influence of Beam-Reduction and Rib-Addition Strengthening Method on Bridge Natural Vibration Properties

Abstract:

In order to study the influence of beam-reduction and rib-addition strengthening method on the natural vibration properties of hollow slab bridges, based on bridge natural vibration frequency and the vibration mode in the first three orders as main comparison parameters, according to the comparison between the theoretical values as well as experimental values of the natural vibration properties before and after strengthening, the practical effect of this strengthening method is studied. The test data show that the beam-reduction and rib-addition strengthening method results in an obvious enhancement of the natural vibration frequency of simply supported hollow slab bridges, which proves that the strengthening method has remarkable improvement effect on the rigidity of bridges. It can be seen from the comparison of the changes of the vibration mode in the first three orders before and after strengthening that the transverse connection of bridge is strengthened and the integrity is prominently enhanced after strengthening. The study result is that the beam-reduction and rib-addition strengthening method can greatly enhance the structural behavior of hollow slab bridges.

• Periodical: Applied Mechanics and Materials (Volumes 178-181)
• Pages: 2158-2163
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.178-181.2158
• Online since: May 2012
• Authors: Guang Ning Pu
• Keywords: Beam-Reduction and Rib-Addition Method, Bridge Works, Frequency, Natural Vibration Properties, Strengthening, Vibration Mode

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