research
Modal analysis of historical masonry structures: Linear perturbation and software benchmarking
https://www.sciencedirect.com/science/article/pii/S0950061818322116 The mechanical behavior of masonry materials has a common feature: a nonlinear behavior with high compressive strength and very low tensile strength. As a consequence, old masonry buildings generally present cracks due to permanent loads and/or accidental events. Therefore, the characterization of the global dynamic behavior of masonry structures should take into account the presence of existing cracks.
Experimental and numerical investigations on the seismic behaviour of the San Frediano bell tower in Lucca
https://www.annalsofgeophysics.eu/index.php/annals/article/view/8025 https://www.researchgate.net/publication/331199456_Experimental_and_num… This paper presents a study on the seismic response of the San Frediano bell tower in Lucca.
Numerical insights on the structural assessment of historical masonry stellar vaults: the case of Santa Maria del Monte in Cagliari
New Paper: "Numerical insights on the structural assessment of historical masonry stellar vaults: the case of Santa Maria del Monte in Cagliari" Enjoy this free version of the paper!
Call for Abstract - Frontiers in Built Environment, Earthquake Engineering
Dear colleagues, Given the recent establishment of the so-called Urban Seismology field and the lack of dedicated journals for the topic, together with Professor Maria Todorovska (University of Southern California, USA), Dr. Riccardo Maria Azzara (INGV, Italy), Dr. Michele Palermo and Dr. Simonetta Baraccani (University of BOlogna, Italy), we would like to establish a network of researchers dealing with this very challenging topic.
Modal analysis performed by NOSA-ITACA code
The following picture shows a screenshot of the NOSA-ITACA desktop enviroment during a modal analysis. In particular the first and the third mode shape of the San Frediano bell Tower in Lucca (Italy) are shown. The structure is discretized into 45641 eight-node brick elements (element no. 8, NOSA-ITACA element library) with 136923 degrees of freedom. For more details sees: R.M. Azzara, G. De Roeck, E. Reynders, M. Girardi, C. Padovani and D.
Dynamic pigmentary and structural coloration within cephalopod chromatophore organs
https://doi.org/10.1038/s41467-019-08891-x We report the discovery of structural coloration emanating in precise register with expanded pigmented chromatocytes. Concurrently, using an annotated squid chromatophore proteome together with microscopy, we identify a likely biochemical component of this reflective coloration as reflectin proteins distributed in sheath cells that envelop each chromatocyte.
Journal Club for March 2019: Fatigue of hydrogels
Fatigue of hydrogels
Ruobing Bai (1,2), Zhigang Suo (1)
(1) John A. Paulson School of Engineering and Applied Sciences, Kavli Institute for Bionano Science and Technology, Harvard University
(2) Department of Mechanical and Civil Engineering, California Institute of Technology
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