On Monday, September 21, 2026, at 2:00 p.m., Ms. Layla KORDYLAS will defend her dissertation, titled “Identification of Dynamic Models of High-Rise Wood Structures through Multisensor Data Assimilation,” supervised by Mr. Franck RENAUD and Mr. Jean-Luc DION (Euler Laboratory – ISAE-Supméca), at ISAE-Supméca.
Summary:
The construction of buildings is today a major challenge given population growth and environmental concerns. In this context, the use of timber as a structural material appears to be a promising solution for developing new buildings while reducing the carbon emissions associated with the construction sector. However, the regulations applicable to timber-framed buildings remain limited or insufficiently adapted to the specific characteristics of these structures, whose behaviour under dynamic loading differs significantly from that of traditional concrete or steel constructions. It is therefore essential to conduct in-depth studies on their behaviour under dynamic loading. This need is further reinforced by the high variability of the mechanical properties of wood, which makes their characterisation particularly complex. Furthermore, conventional measuring instruments, such as accelerometers and laser vibrometers, have a restricted field of observation, limiting their effectiveness for the analysis of large-scale structures. The ANR (National Agency for Research) project, called DynaTimberEyes, aims to develop new methodologies for the in situ dynamic analysis of timber buildings based on measurements obtained by camera. In this framework, several experimental campaigns were conducted on full-scale timber buildings as well as on reduced-scale models. The results of this work are presented and analysed in this manuscript. This document opens with a literature review devoted to the main concepts mobilised in this research: tall timber buildings, modal analysis and signal processing methods, identification techniques, in particular the extended Kalman filter, as well as camera-based measurement methods and image processing tools. Then, it presents the design and fabrication of a 1:10-scale model, intended for the conduct of a laboratory test campaign. This model made it possible to identify several points of concern and to develop identification methodologies on simplified systems, ranging from an isolated connection to the complete structure. Finally, free and forced vibration tests were carried out on a representative model of a timber building at 1:3 scale, subjected to excitation by a shake table. This work contributed to the development of methods enabling, on the one hand, the identification of forces transmitted between storeys and, on the other hand, the reconstruction of the hysteretic behaviour of connections within these structures.
