1,720,993 research outputs found
Fare, muoversi, pensare. Gli artefatti come mediatori nella ritualità degli Otomì serrani (Messico)
Full text linkThis contribution proposes to analyse the ritual artefacts produced among the Otomi of the Eastern Sierra Madre from a relational perspective. Even before being the offerings and supports of invisible entities, in fact, the materials produced during the performances have the function of tying together a heterogeneous collective of agents involved in a shared action on the world. Materiality appears, in this light, as the connecting element, the necessary mediator, so that human and non-human agentivities can realise together the reactivation of life cycles.Il contributo si propone di analizzare gli artefatti rituali prodotti tra gli Otomì della Sierra Madre Orientale da una prospettiva relazionale. Prima ancora che offerte e supporti di entità invisibili, infatti, i materiali realizzati durante le performance hanno la funzione di tenere insieme un collettivo eterogeneo di agenti coinvolti in un'azione condivisa sul mondo. La materialità si configura, in questa luce, come l'elemento di congiunzione, il mediatore necessario affinché agenività umane e non umane possano realizzare insieme la riattivazione dei cicli vitali
SEISMIC LOSS ASSESSMENT OF EXISTING NONRESIDENTIAL SINGLE-STOREY BUILDINGS: ROLE OF CLADDING AND ROOFING PANELS
No full text
Median design to provide stopping sight distance along horizontal curves in urban freeways
No full textA new approach to design the roadway and its roadside is necessary to provide both stopping sight distance and design flexibility along horizontal curves. This study focuses on median, dividing, and side strips to provide the stopping sight distance along not-straight paths. According to the Italian standard for road design, a procedure for estimating the needed widening for urban freeways is presented: it is based on the diagram speed along symmetric transition curves (clothoid-arc-clothoid). Different geometrical and functional factors have been considered to identify the most critical sections where the largest widening needs: they are generally along the clothoid stretches before circular arcs whose design speed is far below the maximum one. The implementation of the proposed procedure gives the required net widening at different abscissae along the transition curve. The geometric strip connection between current and widened sections could be modeled according to a 3 section-approach along the clothoid. The results can be a valid help both for technical practice (e.g., safe rearrangement of the roadway) and for the correct development of design and construction process (e.g., early prediction ofthe areas to be expropriated)
A COMPONENT-BASED MODEL FOR BASE PLATE CONNECTIONS WITH STIFFENERS
No full textThe paper describes an analytical model to predict the moment-rotation-axial force response of
column base plate connections including base plate stiffeners. The proposed model is based upon
the theoretical background behind the well-known component method, which is employed in EN
1993-1-8 for unstiffened base plates only. The predictions of the proposed model were compared
with numerical results obtained via finite element models of two selected sample connections. The
comparisons show that the analytical model accurately represents the connection response as ob served with the much more complex nonlinear finite element analysis. The potentially important
role of prying forces in predicting the connection response is also highlighted
Blending of Floating Car Data and Point-Based Sensor Data to Deduce Operating Speeds under Different Traffic Flow Conditions
Full text linkNowadays, smart mobility can rely on innovative tools for the knowledge of road system conditions, like operating speed data extracted from the so-called Floating Car Data (FCD). Probe vehicles in the traffic flow send to operation centres a large amount of travel information, collected through GPS detection systems, especially with regard to geolocation, date and time, direction and speed. As the sample deriving from these vehicles represents a tiny portion of the entire vehicular fleet, in this paper an analysis and a comparison with data obtained by point-based traffic sensors is proposed.Therefore, the study analyses data collected by inductive loop detectors and microwave radar sensors, that provide information on the entire traffic flow in the time domain, in particular with the aim to identify free flow speed time bands. Afterwards, by means of the fusion between the results obtained from the data coming from these point-based control units and the ones coming from the probe vehicles, a comparison of the operating speeds in the two conditions of constrained and unconstrained traffic flow is performed
Speed data collection methods: a review
Full text linkVarious studies have been focusing on a wide range of techniques to detect traffic flow characteristics, like speed and travel times. Therefore, a key aspect to obtain statistically significant set of data is to observe and record driver behaviours in real world. To collect traffic data, traditional methods of traffic measurement - such as detection stations, radar guns or video cameras - have been used over the years. Other innovative methods refer to probe vehicles equipped with GPS devices and/or cameras, which allow continuous surveys along the entire road route. While point-based devices provide information of the entire flow, just in the section in which they are installed and only in the time domain, probe vehicles data are referred both to temporal and space domains but ignore traffic conditions. Obviously, it is necessary that the data collected refer to representative samples, by number and composition, of the user population. The paper proposes a review of the most used methods for speed data collection, highlighting the advantages and disadvantages of each experimental approach. Accordingly, the comparison illustrates the best relief method to be adopted depending on the research and investigation that will be performed
Collapse Fragility Curves for Non-residential Older Single-Storey Steel Buildings
No full textThe paper describes the seismic response of non-residential single-story steel buildings designed in the decade 1980s–1990s in Italy. To this end, multiple building archetypes were designed following code regulations enforced at that time. The selected case studies are characterized by (i) a main truss system in the transverse building direction and (ii) a concentric braced system in the longitudinal building direction. Various structural schemes and two alternative brace cross section types were considered. 3D non-linear finite element models were built and analysed using OpenSees. The analysis was carried out considering the contribution of envelope panels to the seismic response by using two different types of cladding panels. Empirical fragility curves allow to highlight the role of the structural scheme, the type of envelope panels and the increasing level of the building site seismic hazard
- …
