The Torsional Response of Civil Engineering Structures during Earthquake from an Observational Point of View

Abstract

This paper discusses the origins of torsion and its effect on the response of structures with a focus on the contribution of experimental data. The fact that torsion increases the stresses in structures, augmenting strain and damage during earthquakes, was confirmed in the 1960s. Over the years, the torsional response of structures has mainly been analysed through numerical studies, because few buildings are equipped with translational sensors, and even fewer are equipped with rotational sensors. This is likely to change as building instrumentation becomes more widespread and new generations of rotational sensors are developed. Therefore, this paper focusses on a number of scientific questions concerning the rotational response of structures during earthquakes and the contribution of experimental data to the understanding of this phenomenon.

Structural change detection applying long-term seismic interferometry by deconvolution method to a modern civil engineering structure (New Zealand)

“…The torsional motion of the building response could be as a result of several components (e.g., static eccentricity related to the design, accidental related to the rotational seismic ground motion, with nonlinear aspects, etc. ), that would require a full and extensive analysis in further studies Guéguen and Astorga. 2021).…”

Reliability Assessment of Masonry Infilled RC Frame Building’s Earthquake Performance through Accidental Torsion Consideration

“…Several more authors [43][44][45][46][47] have researched the subject of accidental eccentricity; however, with those utilising the nonlinear range, there is a lack of model verification with experimental data and considering partition walls, as earlier mentioned. On that note, Guéguen et al [48,49] highlight that the torsional response of structures has been mainly analysed with numerical studies due to a lack of experimental data with translational and rotational sensors. Although irregular buildings seem more important when studying accidental torsion effects, symmetric buildings' structural response to accidental torsion effects is increased compared to unsymmetrical buildings [50].…”

The Development of a New IFOG-Based 3C Rotational Seismometer

“…Recently, because of the development of devices based on Sagnac effect, measuring rotational seismic waves directly becomes available, and these sensors display a lower flat frequency range for measurement [ 4 ]. Therefore, rotational seismology has been rapidly developed, attracting much attention from many communities to explore additional valuable information in rotational ground motions [ 5 ], which promotes the applications in seismology and civil engineering structures [ 6 , 7 ]. Rotational ground motions on the far field have been successfully measured at sites [ 8 ].…”