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Bernardi, F.,Grass, M.E.,Hong, Y.P.,Chang, R.,Jabeen, N.,Zhang, C.,Eichhorn, B.W.,Seo, B.,Alayoglu, S.,Hussain, Z.,Joo, S.H.,Liu, Z. Elsevier Science Publishers 2016 CATALYSIS TODAY - Vol.260 No.-
<P>Rh0.5Pd0.5/CeO2 bimetallic nanoparticles were subjected to reducing and oxidizing atmospheres at different temperatures and characterized by means of the Ambient Pressure X-Ray Photoelectron Spectroscopy (AP-XPS). The surface atomic population is calculated for all cases. By using a high temperature pretreatment at 480 degrees C in H-2 atmosphere, it was possible to control the surface atomic population with Pd atoms frozen at the skin layer even in an oxidizing atmosphere, which is not observed without high temperature pre-treatment (Rh atoms at the skin layer). The change of the Rh/Pd surface segregation behavior after the high temperature pre-treatment is attributed to the geometrical factor of Strong Metal Support Interaction (SMSI) effect, i.e., the occurrence of the ceria capping layer around nanoparticles. (C) 2015 Elsevier B.V. All rights reserved.</P>
E. Michelini,P. Bernardi,R. Cerioni,B. Belletti 한국콘크리트학회 2020 International Journal of Concrete Structures and M Vol.14 No.4
The paper presents the results of flexural and shear tests up to failure on full-scale hollow-core slabs (HCS) having a depth of 500 mm. A detailed non-linear 2D finite element model is also developed to predict the stress distribution and crack pattern within the slabs, providing a well match with experimental results. Experimental and numerical results are compared with analytical calculations provided by Product Standard EN 1168, highlighting the inaccuracy of technical regulations in predicting shear behavior. The proposed numerical procedure is instead viable and sound for the design and the strength assessment of HCS, and can be extended easily to the analysis of whole floor systems.