Search results for "Modell"

Response behaviour of reinforced concrete beams strengthened in shear with FRP

2019

In this paper an analytical model, able to predict the shear-displacement response of slender RC beams reinforced in shear with FRP, is presented. It allows to evaluate the complete strain and stress fields, for each load step, on the basis of the MCFT framework. The key role of the effective strain of FRP reinforcement at failure has been investigated. At the same time, the interaction FRP-steel stirrups has been taken into account by introducing an appropriate factor. It is able to reproduce the decrease of stirrups stress level when an external reinforcement is used. The proposed model has been validate against a database of specimens collected in literature. Results have shown the remar…

Benefattori e beneficati. La relazione asimmetrica nel "de beneficiis" di Seneca.

2009

SULLA DEFINIZIONE DELLE PERDITE NEI LATI DELLE RETI DI DISTRIBUZIONE PER LA SIMULAZIONE IDRAULICA NELL’AMBITO DEI MODELLI DI ASSET MANAGEMENT

2012

La progettazione di interventi per una mobilità sostenibile in ambito urbano

2014

Lo scopo di questo studio è stato quello di proporre un modo diverso di intendere le ZTL (Zone a Traffico Limitato), sia dal punto di vista della loro pianificazione sia dal punto di vista tecnologico e gestionale. Si intende puntare a risultati concreti e innovativi, ricercando strumenti, processi e soluzioni per il miglioramento della pianificazione, organizzazione e gestione delle ZTL. In particolare, si affronta il tema del road pricing e del parking pricing e di come questi strumenti si possono integrare all’interno del sistema trasportistico già esistente. A fronte di questi temi si vuole proporre un modello di pricing innovativo, sia dal punto di vista tecnologico sia metodologico, c…

Coloring Linear Algebra

2016

[EN] We present an example of how we can introduce basic concepts on Linear Algebra in a first course of an Engineering School. We use the RGB pattern color which allows us to decompose a color into three primary colors (namely, red, green, blue). By using this model we give a natural connexion between the additivity of the color decomposition and the notions on linear algebra (as vector space, linear combination and convex linear span of vectors). To visualize these connexions we use Geogebra.

Seeking the Holy Grail: robust chronologies from archaeology and radiocarbon dating combined

2018

The strengths of formal Bayesian chronological modelling are restated, combining as it does knowledge of the archaeology with the radiocarbon dating of carefully chosen samples of known taphonomy in association with diagnostic material culture. The risks of dating bone samples are reviewed, along with a brief history of the development of approaches to the radiocarbon dating of bone. In reply to Strien (2017), selected topics concerned with the emergence and aftermath of the LBK are discussed, as well as the early Vinča, Ražište and Hinkelstein sequences. The need for rigour in an approach which combines archaeology and radiocarbon dating is underlined.

Les traces de la vitesse entre réseau et territoire : approche géohistorique de la croissance du réseau ferroviaire français

2016

The interaction between space and network are frequently questioned in the academic literature, by asking the economical and demographical impacts of a new infrastructure, often studied at the scale of a project. This work aims to investigate the components of the interaction in both large spatial and temporal scales. The hypothesis is that the temporal depth and the national scale could bring new explanations. This work is based on the collect, the exploitation and the analysis of the large spatio-temporal database FRANcE (French Railway Network). It identifies all sections of the network since the 19th century and the population census. This database also contains the traces of the speed,…

Exploring single polarization X-band weather radar potentials for local meteorological and hydrological applications

2015

Summary The aim of this study is to evaluate the potential use of a low-cost single polarization X-band weather radar, verified by a disdrometer and a dense rain gauge network, installed as a supporting tool for hydrological applications and for monitoring the urban area of Palermo (Italy). Moreover, this study focuses on studying the temporal variability of the Z–R relation for Mediterranean areas. The radar device is provided with an automatic operational ground-clutter filter developed by the producer. Attention has been paid to the development of blending procedures between radar measurements and other auxiliary instruments and to their suitability for both meteorological and hydrologic…

Influence of spatial precipitation sampling on hydrological response at catchment scale

2014

Retrieving precipitation data from raingauge network is a classical and common practice in hydrology and climatology. These data represent the key input in hydrological modeling to reproduce, for example, the characteristics of a flood phenomenon. The accuracy of the model results is strongly dependent on the consistency of the monitoring network in terms of spatial scale, i.e. network density and location of raingauges, and time resolution. In this context, several studies have been carried out to analyze how the rainfall sampling influences the estimation of total runoff volume. The aim of this paper is to use a physically based and distributed-parameter hydrologic model to investigate ho…

Impact of rainfall data resolution in time and space on the urban flooding evaluation

2012

ABSTRACT Climate change and the modification of urban environment increase the frequency and the impact of flooding rising the interest of researchers and practitioners on this topic. Usually flooding frequency analysis in urban areas are indirectly carried out by adopting advanced hydraulic models to simulate long historical rainfall series or design storms. However their results are affected by a grade of uncertainty which has been much investigated in recent years. One of the most critical source of uncertainty inherent to hydraulic model results is linked to the imperfect knowledge of the rainfall input data both in time and space. Several studies show that hydrological modelling in urb…