277 © Springer International Publishing AG 2018 R. Rupakhety, S. Ólafsson (eds.), Earthquake Engineering and Structural Dynamics in Memory of Ragnar Sigbjörnsson, Geotechnical, Geological and Earthquake Engineering 44, https://doi.org/10.1007/978-3-319-62099-2_14 Chapter 14 Simulation and Monitoring of Floating Bridge Behaviour K.A. Kvåle, Ole Øiseth, A. Rönnquist, and S. Remseth Abstract Firstly, this paper presents a review of the main steps for simulating foat- ing bridge behaviour. Both time-domain and frequency-domain approaches are pre- sented. An exemplifed model setup and simulation results from the selected case study are presented. Secondly, data obtained from extensive structural and environ- mental monitoring of the studied bridge are presented. Data analyses attempting to visualize the correlations between excitation sources and response quantities are discussed. Finally, an operational modal analysis is carried out, to attempt to iden- tify the modal parameters from response measurements only. Keywords Stochastic dynamic behaviour • Stochastic dynamics • Pontoon bridge • Simulation • Monitoring 14.1 Introduction The new Coastal Highway Route E39 along the western coast of Norway requires several fjord crossings between 2000 and 5500 m of length. The Norwegian Public Roads Administration is funding an extensive research program, including several studies by PhD students and postdocs at the Norwegian University of Science and Technology, to support safe design of the new fjord crossings. The late Professor Ragnar Sigbjörnsson had a major role in defning this research program both related to required theoretical development, numerical models, full scale measurements and statistical approaches to arrive at recommended perfor- mance-based design. Various types of bridges, including suspension bridges, foating bridges, suspen- sion bridges with foating towers and submerged foating tunnels are considered for K.A. Kvåle • O. Øiseth • A. Rönnquist • S. Remseth (*) Department of Structural Engineering, Faculty of Engineering, NTNU, Norwegian University of Science and Technology, Trondheim, Norway e-mail: svein.remseth@ntnu.no