Development of a traffic load model for bridge structures within an urban subway system

Author:

Tepho Thibault1,Nowak Marcel1,Fischer Oliver1,Tamm Philipp2,Schöning Markus2

Affiliation:

1. Technical University of Munich, Chair of Concrete and Masonry Structures, Munich, Germany

2. Stadtwerke München GmbH, Munich, Germany‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌

Abstract

<p>Subway systems are a key component of today’s urban infrastructure. However, current engineering standards such as the Eurocode only give few indications regarding the modelling of traffic loads for subway trains. For this reason, a traffic load model is developed based on load model LM71 from Eurocode 1 - Part 2, the standard load model for rail bridges. The aim is to scale this load model so that it is able to cover the extreme load effects resulting from actual subway trains within the subway network. Within the scope of these investigations, different structural systems and load effects are studied, as well as different strategies for modifying LM71 and its scaling factor α. Additionally, the results obtained for simplified beam systems are validated on real structures to account for effects like two-dimensional bearing capacity for the determination of the scaling factor α. These investigations are performed for the subway system of the city of Munich.</p>

Publisher

International Association for Bridge and Structural Engineering (IABSE)

Reference8 articles.

1. DIN EN 1991-2:2010-12, Eurocode 1: Actions on structures – Part 2: Traffic loads on bridges

2. Objektspezifische Verkehrslastansätze für Straßenbrücken;Marcel Nowak;Beton- und Stahlbetonbau

3. Nowak, M.; Straub, D.; Fischer, O : Statistical extrapolation for extreme traffic load effect estimation on bridges. 14th International Probabilistic Workshop, Ghent, 2016

4. Nowak, M.; Straub, D.; Fischer, O. : Extended extrapolation methods for robust estimates of extreme traffic load effects on bridges. 6th International Symposium on Life Cycle Civil Engineering (IALCCE 2018), Ghent, 2018

5. DIN EN 1991-2/NA:2012-08, National Annex– Nationally determined parameters – Eurocode 1: Actions on structures – Part2 :Traffic loads on bridges

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