Abstract
The Hercílio Luz suspension bridge, built in 1926, has been out of service since 1991 due to high corrosion levels and structural element impairment. A complete rehabilitation project was developed which included the replacement of the impaired items and foundation strengthening. For this, an auxiliary structure was employed to support the central span during the rehabilitation process. A carefully studied load transfer process, where the central span loading is transferred from the eye-bar towards the auxiliary structure will be performed. For this purpose, a synchronized jacking sequence will be used, which was predefined by means of numerical model analysis. All structural elements had their designs evaluated and some geometric changes were implemented. This paper presents all the methodology developed in the rehabilitation project of Hercilio Luz bridge, as well as the development stages up to the present date.
Highlights
I n the past years, the rehabilitation process of civil engineering structures such as bridges and overpasses has gained relevance [1,2,3,4,5,6,7,8,9,10,11,12,13,14]
This paper presents all the methodology developed in the rehabilitation project of Hercilio Luz bridge, as well as the development stages up to the present date
Main conclusions: - Due to high corrosion levels, the Hercilio Luz Bridge needs to be rehabilitated and repaired to be reopened to traffic. - The rehabilitation project was conceived considering an auxiliary structure under the bridge main span
Summary
I n the past years, the rehabilitation process of civil engineering structures such as bridges and overpasses has gained relevance [1,2,3,4,5,6,7,8,9,10,11,12,13,14]. The fatigue damage – that can occur at low stress levels under alternating stresses – results in considerable repair costs, which must be evaluated in the rehabilitation project viability. The bridge is 819.5 m long and its length is composed of: 259 m of island overpass, 339.5 m of main span (Fig. 1) and 221.0 m of continent overpass. The main span makes the Hercilio Luz Bridge one of the largest in the world and one of the last possessing eye-bars incorporated to a truss
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