CONTROL OF EARLY AGE CRACKING IN A MASSIVE TUNNEL STRUCTURE BASED ON EXPERIMENTAL INVESTIGATIONS AND NUMERICAL SIMULATIONS

Author(s): Wibke Hermerschmidt, Martin Laube , Alex-W. Gutsch , Hartmann Alberts ,
Robert Teuber, Eckart Thoms
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-170-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 56-65
Total Pages: 9
Language : English

Abstract: In massive tunnel structures, early age cracking can lead to a loss of serviceability of the
structure due to leakage. Therefore, a realistic calculation of the temperature and stress
development caused by heat of hydration is necessary to ensure an economic design. This
paper presents an application example for the control of early age cracking in a massive
tunnel structure. Experimental investigations are carried out to characterize the
thermomechanical behaviour of the concrete at early ages. This includes the testing of the
adiabatic heat release, the development of the mechanical short term properties (compressive
strength, tensile strength and Young's modulus) and the autogenous shrinkage. The
experimental results are used to perform numerical simulations of the temperature and stress
development in the tunnel structure. In addition, the temperatures and strains in the structure
are metrologically monitored to validate the simulation results.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00