Naslov
The dynamic response of a highway bridge under actual traffic load

Autori
Markulak, Damir ; Varevac, Damir ; Truhar, Ninoslav

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

Izvornik
Progress in Steel, Composite and Aluminium Structures / Gizejowski, Marian i dr. - Rzeszów : A.A. Balkema Publishers, 2006, 264-265

Skup
XI Internationa Conference Metal Structures

Mjesto i datum
Rzeszów, Poljska, 26.06.2006. - 28.06.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
dinamički odgovor cestovnog mosta; stvarno prometno opterećenje; dinamički model vozilo-most; parcijalne diferencijalne jednadžbe; reprezentativni set vozila; Beta raspodjela
(: dynamic response of the highway bridge; actual traffic load; dynamic vehicle-bridge model; partial differential equations; representative set; Beta-distribution)

Sažetak
The problem of the dynamic response of the highway bridge under the actual traffic load has been analysed. The dynamic influence of the heavy lorry vehicles under usual circumstances does not affect on a bearing load capacity, but continuosly degrades serviceability of the bridge and thus its service life. Increasing number of the lorry vehicles and their weight, as well as more lighter and flexibile bridges, additionally empahasize this fact. Determination of the dynamic response of the bridge resulting from the passage of a heavy vehicles across the bridge is very complicated and depends on many parameters such as dynamic characteristics of the vehicle and the bridge, heavy vehicle geometry and the speed, roughness of the surface profile of the bridge, the natural frequencies of the vehicle and the etc. The classical calculation procedure includes simplified calculation of the dynamic bridge response based on increased static load. This procedure neglects the fact that degradation of the bridge appears not only by the extreme traffic load but continuously by the real heavy vehicles. Moreover, the dynamic interaction between the vehicle and the bridge and stochastic nature of the traffic load also is usually neglected. In this paper we present approach which is based on a stochastic characteristic of the actual traffic flow and numerical calculation of dynamic interaction system heavy vehicle-bridge. Vehicles are modelled as a group of axles (SDOF model) with the dynamic characteristic (stiffness and damping), and the weight is treated as stochastic variable. Dynamic vehicle-bridge model has been defined by the system of coupled partial differential equations.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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