Simplified Method of Determination of Natural-Vibration Frequencies of Prestressed Suspension Bridge

Abstract

A suspension bridge is the most suitable type for a long-span bridge. Increased kinematic displacements are the major disadvantage of suspension bridges. This problem can be solved by application of prestressed cable truss. Dynamic approach is one of regulated bridge design parts. Simplified determination method of natural-vibration frequencies of prestressed suspension structure and its experimental validation is presented in this paper. Natural-vibration frequencies and mode shapes of the model depending on the prestressing level were determined. It was experimentally proved, that mode shape with one half-wave does not appear for the model. The difference between results, which were calculated by the developed simplified determination method of natural-vibration frequencies of prestressed suspension structure and experimentally achieved by the model testing, does not exceed 20%. Therefore the method is applicable for preliminary dynamic analyses of structures.

The Simplified Analysis of the Asymmetric Single-Pylon Suspension Bridge With Rigid Cables

“…A huge number of analytical calculation methods for classical suspension bridges with flexible cables are based on nonlinear calculation in line to the deformed scheme (Arco & Aparicio, 2001;Clemente et al, 2000;Gimsing & Georgakis, 2012;Idnurm, 2006;Jennings, 1987;Kim & Thai, 2010;Kulbach, 2007;Wollmann, 2001). Extensive research refers to examining the dynamic characteristics of suspension bridges (Goremkins et al, 2013;Sousa et al, 2011;Treyssede, 2010).…”

The Application of the Finite Element Method for Static Behaviour Analysis of the Asymmetrical One-Pylon Suspension Bridge Built-in Bending Cables of Different Rigidity

“…A large number of analytical methods for calculating classical suspension bridges with rigid cables are based on nonlinear calculations according to the distorted scheme (Arco & Aparicio, 2001;Clemente, Nicolosi, & Raithel, 2000;Gimsing & Georgakis, 2012;Idnurm, 2006;Jennings, 1987;Kim & Thai, 2010;Kulbach, 2007;Wollmann, 2001). Also, plenty of studies on the dynamic characteristics of suspension bridges have been carried out (Capsoni, Ardito, & Guerrieri, 2017;Goremkins, Rocens, Serdjuks, & Sliseris, 2013;El Ouni & Kahla, 2012;Sousa, R., Souza, R. M., Figueiredo, & Menezes, 2011;Treyssede, 2010).…”