Bridges: Moesa

Case study: SOFO System

Steel-concrete railway bridge
Shrinkage monitoring
Deformation monitoring during push

Project Description

Summary: Railway bridge, concrete monitoring during setting, deformations monitoring during bridge sliding

Clients: Swiss Railway

Place: Ticino Canton (Switzerland)

Period: 1996 - N/A

Installation: IMM SA

Structure's short description: The Moesa railway bridge near Bellinzona is a three-spans bridge consisting in two parallel steel girders with their lower part supporting a 50 cm thick concrete deck. This new bridge was build parallel to the old steel bridge. After dismantling this later, the new bridge was then pushed on the old and refurbished pillars.

Aim of monitoring: Measurement of the concrete deformation due to shrinkage and to the pushing of the bridge.

Number of sensor: 30

Main Results: The sensors that were usable after installation gave nice shrinkage curves similar to those encountered at Venoge. A discontinuity due to the heating produced by the concrete setting in the successive section was also visible. During the push phase, additional sensors were attached under the concrete slab and measured the curvature of the bridge due to uneven push

Bibliography:

Structural monitoring by curvature analysis using interferometric fiber optic sensors , D. Inaudi, S. Vurpillot, N. Casanova, P. Kronenberg, Smart Materials and Structures, Vol 7, p.199-208, 1998

Railway bridge monitoring during construction and bridge sliding , D. Inaudi, N. Casanova, P. Kronenberg, S. Vurpillot, SPIE, Smart Structures and materials, San Diego, USA, Vol 3043, p. 58 - 64, 1997

Fiber optic deformation sensors for bridges monitoring , D. Inaudi, N. Casanova, S. Vurpillot, Int. Conf. on New Technologies in Structural Engineering, Lisboa, Portugal, p 975-982, 1997

Verformungsmessungen mit optischen Glasfasersensoren , N. Casanova, Weiterbildungskurs ETH Z?ich, Feldmessungen und Beobachtungsmethode in der Geotechnik, Switzerland, p 1-10, 1997

Verformungsmessungen mit optischen Glasfasersensoren , N. Casanova, Messen in der Geotechnik 98, IGB-TUBS Braunschweig - Institut f? Grundbau und Bodenmechanik Fachseminar, Germany, p 1-14, 1998