SEISMIC BEHAVIOR OF A DUAL-DECK CABLE-STAYED BRIDGE WITH INVERTED-Y TOWERS

• Type: Article in International Conference Proceedings Book
• Date: 2016

Authors

Almeida, P (Author) Other; Rui Carneiro de Barros (Author) FEUP

Conference proceedings International

Title: Integrity-Reliability-Failure

Pages: 1443-1450

Indexing

ISI Web of Knowledge - 0 Citations

Other information

Authenticus ID: P-00M-938

Abstract (EN): The Third Tagus Crossing (TTT) proposed to cross the Tagus River between Lisbon and the southern side, is a cable-stayed bridge with double composite steel/concrete deck. If final decision is taken towards the design contest and bridge construction, this bridge will have the longest cable-stayed crossing for simultaneous road and high-speed railway use in Europe. The dual deck supported by two Warren type trusses, consists of two platforms: at the top, for the road traffic circulation, with six lanes; the other lower platform, for high-speed railway traffic with four lanes. In this work are detailed results of the seismic analysis for two possible typologies of the bridge towers, for this third crossing of the Tagus River. The main objective is to analyse the dynamic behaviour under seismic actions varying the tower typology comparing the response in terms of moments and displacements between the H-shaped (inverted Y shape with cross-bracings) and inverted Y (classic single Y shape). Without the immediate objective of analysing in detail the deck elements, use is made of an equivalent beam with the properties of the proposed deck cross section. The equivalent beam is the same for the analysis of two types of towers, so the main difference in this study is in the shape of towers.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8