Abstract The destruction of Amatrice and the surrounding villages in Central Italy after 2016 seismic sequence was so impressive that engineers, authorities local communities started sharing common feeling historical stone masonry buildings were too below current safety standards. severe damage caused by earthquakes led to a general distrust traditional building techniques, leading conclusion there is nothing do but demolish rebuild, perhaps with false antique. Is an alternative? way combine...

Detecting the onset of structural damage and its progressive evolution is crucial for assessment maintenance built environment. This paper describes application a computer-vision-based methodology health monitoring to shake table investigation. Three rubble stone masonry walls, one unreinforced two reinforced, were tested under natural earthquake base inputs, progressively scaled up collapse. White noise signals also applied dynamic identification purposes. Throughout experiments, videos...

Numerical modelling of masonry structures is nowadays still an active research field, given a number open issues related to preservation and restoration historical constructions the availability computational tools that have become more refined. This work focuses on analysis settlement-induced failure patterns characterizing in plane response two-dimensional dry-joints panels, which differ terms texture, geometry settlement configuration. Brick-block masonry, interpreted as jointed assembly...

Abstract Interest in small-to-medium magnitude earthquakes and their potential consequences has increased significantly recent years, mostly due to the occurrence of some unusually damaging small events, development seismic risk assessment methodologies for existing building stock, recognition induced seismicity. As part a clear ongoing effort earthquake engineering community develop knowledge on posed by smaller global database with moment magnitudes range from 4.0 5.5 which damage and/or...

This paper presents a force-based equivalent frame procedure applied to analyse masonry walls structural response under cyclic loadings. The presented macroelement formulation, consisting in the arrangement series of central elastic beam, two nonlinear flexural hinges at ends and shear link, adopts smooth hysteresis model for these latter, where scalar damage variable is introduced reproduce strength stiffness degradation.Main points adopted are recalled, with emphasis on capability typical...

Ageing structures and infrastructures need to be monitored assess their structural health conditions prioritize interventions possibly extend service life. To do this, accelerometers velocimeters are routinely adopted part of a consolidated state-of-the-art procedure. Nonetheless, some difficulties may arise in field applications, related energy supply, cost, accessibility the devices. Moreover, position sensors needs decided priori, with degree engineering judgment. Alternative techniques...

Macro-modelling approaches are widely used for assessing the effects of infill panels.However, they contain some specific uncertainties concerning definition equivalent strut (such as width strut, non-linear constitutive law under cyclic actions and assignment mechanical properties in multiple models) that causes variability global structural response.As a result, there is need to identify what parameters influence overall response building.After identification significant parameters, it...

A macroelement is presented for the nonlinear dynamic analysis of masonry structures under seismic actions.The macroelement, developed in framework equivalent frame model, has a force-based formulation and accounts flexural shear failure mechanisms, by means two hinges at ends link, respectively.The are formulated according to Bouc-Wen model describe progressive development cracks hysteresis loops load reversals.The addition aforementioned effects, strength/stiffness decay adopting...

Reinforced concrete slabs are a widely diffused structural solution either in Italy, or abroad; this for series of advantages connected to their conception and performances. However, is obtained as result proper design, especially oriented appropriately sizing the thickness plate itself. Moreover, flat structures with concentrated loads, case on punctual supports, phenomenon punching can't be neglected, it inevitably affects structure so must taken into account even early stages project. In...

Abstract There is a growing need for monitoring the structural health conditions of aging structures and prioritizing maintenance works to extend their safe service life. This requires cheap, flexible, reliable tools suitable everyday use in engineering practice. paper presents computer vision-based technique combining motion magnification statistical algorithms calculate natural frequencies under environmental noise excitation, its application reinforced concrete elevated water tank....

This study investigates the influence of carbon dioxide (CO2) control in environmental chambers, where hydraulic lime mortar specimens are typically cured before strength testing according to EN1015-11:2019. To do this, three sets identical samples were cast. Two an chamber that offered same temperature and relative humidity but different CO2 conditions. In first chamber, carbonation reactions used ambient trapped hermetically sealed air. The second was connected external supply, which...