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   https://doi.org/10.1016/j.compstruc.2022.106784  

   Jokar, Mehdi ; Semperlotti, Fabio ( July 2022 , Computers & Structures)
2. STRUCTURAL ANALYSIS OF POST-DISASTER MASONRY STRUCTURES MODELED USING CLOUD2FEM SOFTWARE

   https://doi.org/10.5194/isprs-archives-XLVIII-M-2-2023-827-2023  

   Kaushal, S. S. ; Gutierrez Soto, M. ; Napolitano, R. ( January 2023 , The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences)

   Abstract. Research often neglects historic and ageing infrastructure when investigating the impact of extreme wind loading and structural strengthening. This is exemplified by the ASCE 7-22 standard in the US that prescribes design loads for tornado hazard, which currently does not apply to Risk Categories (RC) 1 and 2, comprising a significant proportion of historic structures. After a disaster, analyzing these structures numerically can be difficult due to their complex geometries, use of multiple construction materials, and alterations to the original structure. This study aimed to digitally document and evaluate the damage caused by the Midwest Tornado in Kentucky in December 2021, specifically focusing on the historic downtown of Mayfield, KY. Building data was gathered using various devices, such as Unmanned Aerial Vehicle’s, LiDARs, and cameras, and converted into finite element meshes using the open-source software Cloud2FEM. Multiple meshes for the historic post office building in Mayfield, KY, was generated using varied rules within Cloud2FEM. These meshes were then simulated using Abaqus to qualitatively assess the stress concentrations observed under tornadic loading calculated using the ASCE7-22.

    

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3. Structural Analysis of the Regulatory GAF Domains of cGMP Phosphodiesterase Elucidates the Allosteric Communication Pathway

   https://doi.org/10.1016/j.jmb.2020.08.026  

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4. Structural analysis and tectonic evolution of the western domain of the Eastern Kunlun Range, northwest Tibet

   https://doi.org/10.1130/B35388.1  

   Wu, Chen ; Liu, Changfeng ; Fan, Suoya ; Zuza, Andrew V. ; Ding, Lin ; Liu, Wencan ; Ye, Baoying ; Yang, Shijie ; Zhou, Zhiguang ( October 2019 , GSA Bulletin)

   The Tibetan Plateau, the largest highland on Earth, formed due to the collision of India-Asia over the past 50−60 m.y., and the evolution of the Tibetan Plateau impacts our knowledge of continental tectonics. Examination of the northernmost margin of the Tibetan Plateau is key to unravelling the deformation mechanisms acting in northern Tibet. The left-slip Altyn Tagh fault system defines the northwest margin of the Tibetan Plateau, separating the Western and Eastern Kunlun Ranges in the southwest. Both Cenozoic and pre-Cenozoic crustal deformation events at this junction between the Altyn Tagh and Kunlun Ranges were responsible for the construction of northwestern Tibet, yet the relative contribution of each phase remains unconstrained. The western domain of the Eastern Kunlun Range is marked by active NE-trending, left-slip deformation of the Altyn Tagh fault and an E-striking Cenozoic thrust system developed in response India-Asia collision. To better constrain the Paleozoic Altyn Tagh and Kunlun orogens and establish the Cenozoic structural framework, we conducted an integrated investigation involving detailed geologic mapping (∼1:50,000 scale), U-Pb zircon geochronology, and synthesis of existing data sets across northwestern Tibet. Our new zircon analyses from Paleoproterozoic−Cretaceous strata constrain stratigraphic age and sediment provenance and highlight Proterozoic−Paleozoic arc activity. We propose a tectonic model for the Neoproterozoic−Mesozoic evolution of northwestern Tibet wherein restoration of an ∼56-km-long balanced cross section across the western domain of the Eastern Kunlun suggests that Cenozoic minimum shortening strain was ∼30% (∼24 km shortening). Field evidence suggests this shortening commenced after ca. 25−20 Ma, which yields an average long-term shortening rate of 1.2−0.9 mm yr−1 and strain rates of 4.7 × 10−16 s−1 to 2.3 × 10−16 s−1. Geometric considerations demonstrate that this contractional deformation did not significantly contribute to left-slip offset on the Altyn Tagh fault, which has ∼10 mm/yr slip rates. 

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   https://doi.org/10.1021/acschembio.0c00809  

   Vinnik, Vladimir ; Zhang, Fan ; Park, Hyunjun ; Cook, Taylor B. ; Throckmorton, Kurt ; Pfleger, Brian F. ; Bugni, Tim S. ; Thomas, Michael G. ( January 2021 , ACS Chemical Biology)

   null (Ed.)