Abstract
AbstractA reliable novel monitoring approach is developed to assess the structural condition of reinforced-concrete bridge elements. The approach is based on combining acoustic emission technique and strain gauge measurements, and it is illustrated by a case study of a composite steel–concrete viaduct in service since 1957. Monitoring was performed on its reinforced-concrete deck slab under traffic and environmental loading for one year. The monitoring setup and procedure are presented. The variation of acoustic emission signals is evaluated regarding strain and temperature measurements. Parametric study, pencil-break test, statistical analysis, crack classification and b-value analysis are performed to assess the structural condition. The acoustic emission activity of the reinforced-concrete slab is evaluated for 1 year under operational conditions. From the monitoring approach, it was possible to identify the nature of the cracking activity in the concrete slab as a function of traffic loading and temperature and to assess in time the condition of the slab-girder connection.
Publisher
Springer Science and Business Media LLC
Subject
Safety, Risk, Reliability and Quality,Civil and Structural Engineering
Reference57 articles.
1. Spathelf CA, Vogel T (2018) Fatigue performance of orthogonally reinforced concrete slabs: Experimental investigation. Eng Struct 168:69–81. https://doi.org/10.1016/j.engstruct.2018.04.058
2. Treacy MA (2014) The use of monitored data in the verification of structural and fatigue safety of existing post-tensioned concrete highway bridges. Ph.D. Thesis Éc Polytech Fédérale Lausanne
3. Fehlmann P (2012) Zur Ermüdung von Stahlbetonbrücken. Ph.D. Thesis. IBK Ber 335
4. Herwig A (2008) Reinforced Concrete Bridges under increased Railway Traffic Loads - Fatigue Behaviour and Safety Measures. Ph.D. Thesis Éc Polytech Fédérale Lausanne
5. Schläfli M (1999) Ermüdung von Brückenfahrbahnplatten aus Stahlbeton. Ph.D. Thesis Éc Polytech Fédérale Lausanne, p 128