1,721,657 research outputs found
A novel macroelement model for the nonlinear analysis of masonry buildings. Part 2: Shear behavior
No full textMacroelement models are widely recognized to be particularly suitable to model the nonlinear behavior of masonry buildings. This article, together with the companion article, presents a new macroelement model, able to solve the limitations of the macroelement model currently implemented in the TREMURI computer program. Whereas the companion article deals with the axial and flexural behavior, this article presents the formulation regarding the shear behavior. In the macroelement currently implemented in the TREMURI program, the shear strength and deformability of an element can be captured only if a manual calibration of equivalent material properties and shear deformation parameters is performed before the analysis. On the contrary, the proposed new macroelement is able to predict the cyclic response of a wall failing in shear, considering multiple strength criteria, directly starting from experimentally measured or code prescribed mechanical properties and automatically calculating the equivalent shear parameters. Furthermore, a procedure to calculate the deformability parameters governing the nonlinear shear response starting from experimentally measured or code prescribed parameters is also included. Therefore, calibrations of material properties and shear deformation parameters at the beginning of the analysis are no longer required. The improved model was then implemented in the TREMURI program and its ability of accurately predicting the nonlinear response of masonry structures is verified through the simulation of experimental tests at different scales
Penna a sfera
No full textProgettata per la Fabbrica d’Armi Pietro Beretta di
Gardone Val Trompia (BS) con l’ingegnerizzazione dell’azienda di settore Delta di Napoli una penna a tiratura limitata
Isolamento e metodi di coltura di microalghe e cianobatteri.
No full textIl capitolo tratta delle principali tecniche per l'isolamento di cianobatteri e microalghe da campioni naturali e per la loro coltivazione, dalla sterilizzazione del materiale, alla preparazione del terreno di coltura, ai metodi di mantenimento e purificazione delle colture
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Lateral strength Of urm piers: comparison between codified criteria and in-plane test results
No full textThe lateral resistance represents one of the most significant wall parameters to be used in the seismic analyses for the design/assessment of masonry buildings. In this article, an investigation on in-plane lateral strength of URM piers has been proposed thorough a comparison between the results from codified criteria and the outcomes of several experimental in-plane cyclic tests on masonry walls. In this context, a new database collecting the results of in-plane cyclic tests on unreinforced masonry piers, carried out within different research projects, has been devel-oped. The database consists of walls with bricks and blocks with different masonry materials (clay, lightweight aerated concrete, AAC, calcium silicate), bed-and head-joint typologies, di-mensions, boundary conditions, vertical applied loads and horizontal loading history. This source of information of consistent and reliable test results represents a necessary step into the process of definition of shared rules in the European context.Accepted Author ManuscriptApplied Mechanic
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