Organizers
Claudio Borri,
University of Florence, Italy
Yaojun Ge,
Tongji University Shanghai, China
Ole Øiseth,
NTNU Trondheim, Norway
Allan Larsen,
COWI, Denmark
Abstract
Very large span bridges (so-called SLSB, such as cable stayed or suspension bridges) are experiencing a steady technological development and a continuous increase of main span length in recent years, which seems to speed-up, due to the ever faster growing of infrastructural needs/ambitions, as well as to the rapidly growing material and technology performances:
- amongst the four cable-stayed bridges over 1000 m main span (built in the last 15 years), the longest main span of 1104m of the Russkij bridge at Vladivostok, Russia, has been reached in 2012. Indeed, closely below it (with 1092m main span) the 2020 Hutong bridge carries both, railway and highway lines
- amongst the eight supension bridges over 1500m main span (built in the last two decades), the 1915 Canakkale bridge over the Dardanelles strait in Turkey reached 2023m main span in 2023
- currently 2 suspension bridges under design (or yet under construction): the 2nd Xihoumen rail/road bridge (1,488m main span) and the Messina strait rail/road crossing (3,300m main span), both with double-slotted deck profile (so-called Messina-type) could break again the records of performaneces within 2032 In parallel, the climatic changes which characterise almost all regions of the world (including the Mediterranean sea) have evidenced an ever frequent arising of non-synoptic winds (i.e. tornadoes, downburst, …) which demands a continuous upgrading of the wind load monitoring and modelling (design loads) in order to guarantee safety, reliability and durability The present Minisymposium shall therefore face following thematic aspects and questions, while collecting world experts in a forum for discussion and open cooperation:
- upgrading the classical and consolidated structural schemes for cable-stayed or suspension bridges to match the increasing demand of performances
- developing and testing innovative wind design load patterns (models) to consider and reproduce the affects of non-synoptic phenomena
- introducing and widening the use of new experimental methods through innovative technologies and laboratories
- making use of high-performance CFD (LES methods, high Re and super-computing tools) in order to match all new reliability requirements
- develop AI methods in order to accompain and/or validate experimental/computational test results
- pre-normative research activity: how to improve and upgrade the current Normative framework for considering non-synoptic wind loads on large bridges ?