Naslov
Influence of girder eccentricity on the dynamic characteristics of the bridge

Autori
Tino MEDVIDOVIĆ, Ivica KOŽAR

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
6th ICCSM Book of Abstracts / Ivica Smojver, Jurica Sorić - Zagreb : Hrvatsko društvo za mehaniku (HDM), 2009, 85-85

ISBN
978-953-7539-10-8

Skup
6th International Congress of Croatian Society of Mechanics

Mjesto i datum
Dubrovnik, Hrvatska, 30.09.2009. - 02.10.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
girder eccentricity; dynamic; bridge

Sažetak
Need to analyze effects of eccentricity on the girder arise when we consider bridge with deep begins or when we want to show influence of beams on the slab stiffness. In most cases of practical interest the effect of eccentricity is neglected or influence of beams to the slab is described by increase of moment of inertia. However, when establishing dynamic parameters for a bridge where the height of girders is much larger than the slab thickness, the effect of increased stiffness plays an important role. In the work we have presented experience based on dynamic measurements taken on a real road bridge. Simple measurements of eigenfrequencies and displacements ''by the book" showed inconsistencies with design data that was based oil static analysis. Agreement of the first eigenfrequency was also poor. It came to authors notice that design was based on analysis of the bridge as a slab and deep girders that are present were modeled as simple beams passing axially through the plate while in reality they were eccentrically placed. Additional structural models have been devised and the one that takes beam eccentricity into consideration demonstrated good agreement with measured data. The paper investigates reasons for good or bad agreement of design structural parameters with on-site measured data and instances when such an agreement is of importance and should be taken into account. It is demonstrated that dynamic parameters are more sensitive than static ones.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne tehničke znanosti

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