Strain Analysis on Cast-In-Place Balanced Cantilever Prestressed Concrete Bridges During Construction

Abstract

This article shows the strain analysis on two cantilever cast-in-place prestressed concrete bridges during construction. Strain gauges, measuring strain based on the change in electrical resistance, were installed on both structures in order to obtain strain results during and after construction. Nonlinear numerical models were made to simulate the realistic behaviour of the structure and show the effect of creep and shrinkage during the construction phases. The numerical model taking into account creep and shrinkage is validated and shows good overlap with the measured results. Relative compressive stresses as well as the necessary precamber are shown. The effects of creep and shrinkage are analysed. Finally, the data can be used to analyse and compare other similar bridges and validate different numerical models. A recommendation for the design of future prestressed concrete balanced cantilever bridges is given.

Keywords:

• experimental research
• balanced cantilever
• prestressed concrete
• concrete bridges
• strain analysis
• monitoring
• numerical modelling

Disclosure Statement

No potential conflict of interest was reported by the authors.

Data Availability Statement

All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.

Additional information

Funding

This research is partially supported through project KK.01.1.1.02.0027, co-financed by the Croatian Government and the European Union through the 10.13039/501100008530 European Regional Development Fund under the Competitiveness and Cohesion Operational Programme.