Naslov
LIMIT STATES OF EXISTING BRIDGES

Autori
Mandić, Ana ; Radić, Jure ; Šavor, Zlatko

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

Izvornik
Proceedings of the Joint IABSE-fib Conference Dubrovnik 2010: Codes in Structural Engineering - Developments and Needs for International Practice / Hirt, Manfred A. ; Radić, Jure ; Mandić, Ana - Zagreb : SECON - CSSE, 2010, 1169-1176

ISBN
978-953-7621-05-6

Skup
Joint IABSE-fib Conference Dubrovnik 2010: Codes in Structural Engineering - Developments and Needs for International Practice

Mjesto i datum
Dubrovnik, Hrvatska, 03.05.2010. - 05.05.2010

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
limit states; reliability; road bridges; traffic load; wind load; seismic load

Sažetak
A great number of existing Croatian bridges have been designed according to old codes, so changes in requirements of new standards and time- variability of loading result with the fact that bridges have different reliability levels. In this paper research, performed in order to develop limit states evaluation procedures of existing bridges, will be presented. Procedures are developed trough their application on major Adriatic arch bridges with spans ranging from 200 m to almost 400 m. These bridges are exposed to the significant traffic load during summer, they are located in regions of high seismicity, and they are exposed to the effects of sea salt and bora wind. Limit states of the superstructure of arch bridges under traffic load and limit states of arches exposed to wind load and arches in seismic design situation are considered. The limit states evaluation procedure presented in this paper, through steps that become more complex and therefore more accurate, is suitable for existing bridge assessment in general. Namely, if limit states of the bridge are satisfied in the first step the following more complex steps are not necessary. If this is not the case the next step of the evaluation - which will produce more accurate results is to be performed. With this research probabilistic model of traffic load effect and of wind load are developed while the probabilistic model of seismic action is proposed as the consecutive step of the procedure development. As a part of bridge management system, it is possible to establish the target reliability of all existing bridges on a certain traffic route in order to realize the same reliability level. Thus the reliability evaluation procedure may be used for priority determination – the bridge with the least reliability level is the first one on the maintenance program.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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