Civil Engineering

CITATIONS 40 READS 225 2 authors, including: Some of the authors of this publication are also working on these related projects: FP7-Eirocrete IAPP -Development of sustainable, lower carbon, pre-cast concrete infrastructure, 2013-2017 View project Organistation of 2nd ICBBM and 1st ECOGRAFI Conferences View project M. Sonebi Queen's University Belfast 159 PUBLICATIONS 943 CITATIONS SEE PROFILE All content following this page was uploaded by M. Sonebi on 07 July 2014. The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately.

The  quantity  and  quality  of  data  is  considered  as  a  critical  factor  that  directly  affects  the  potential  output of freight transportation analysis. Reliable and sufficient data enable the detailed analysis for future planning, for both, infrastructure and operation of transport network. Although the significance of transport data is widely acknowledged by researchers and policy decision-makers, several issues still  exist,  limiting  the  proper  collection  but  above  all  the  use  and  sharing of freight data. The existence of various stakeholders and authorities,  ranging  from  national  statistical  offices  to  shipping  companies  and  logistics  firms  as  well as the evolution of other non-traditional  data  sources  as  key-production “tools” for freight transport data make data collection and sharing a complex and timely consuming procedure. The present paper aims to provide a critical overview of existing sources of data for freight transportation, as well  as  of  existing  schemes  for  sharing  these  data  between  public  and  private  sector.  Findings reveal indicate the complementarity between  public  and  private  sector  roles  in data collection and sharing data for freight transport. The combination of their roles and activities  under  a  clearly  defined  partnership  could  result  to  mutual  benefits  for  both  sectors.  The  review  results  to  a  structured procedure with the form of a framework, which could enable an efficient cooperation among relevant actors for collecting and sharing data for freight transport.

This paper investigates the attitudes and behavior of Greek drivers with specific focus on mobile phone use while driving. The research is based on the data of the pan-European SARTRE 4 survey, which was conducted on a representative sample of Greek drivers in 2011. The analysis of the drivers' behavior was carried out by the statistical methods of factor and cluster analysis. According to the results of factor analysis, Greek drivers' responses in the selected questions were summarized into seven factors, describing road behavior, accident involvement probability, but also their views on issues concerning other drivers' road behavior, enforcement for road safety and mobile phone use while driving. The results of cluster analysis indicated four different groups of Greek drivers: the cautious, the moderate, the conservative and the thoughtless drivers and the characteristics of each group where identified. These results may be useful for the appropriate design of targeted road safety campaigns and other countermeasures.

This paper investigates the attitudes and behavior of Greek drivers with specific focus on mobile phone use while driving. The research is based on the data of the pan-European SARTRE 4 survey, which was conducted on a representative sample of Greek drivers in 2011. The analysis of the drivers’ behavior was carried out by the statistical methods of factor and cluster analysis. According to the results of factor analysis, Greek drivers’ responses in the selected questions were summarized into seven factors, describing road behavior, accident involvement probability, but also their views on issues concerning other drivers’ road behavior, enforcement for road safety and mobile phone use while driving. The results of cluster analysis indicated four different groups of Greek drivers: the cautious, the moderate, the conservative and the thoughtless drivers and the characteristics of each group where identified. These results may be useful for the appropriate design of targeted road safety...

Στο κείμενο της εργασίας πραγματοποιείται μια βιβλιογραφική ανασκόπηση των ανυψωτικών μηχανημάτων, με τα βασικότερα είδη και τον τρόπο λειτουργίας τους. Επιπλέον, παρουσιάζεται η βασική νομοθεσία που διέπει τη χρήση τους, με αναφορές στον χειρισμό, τα ατυχήματα, τους παράγοντες επικινδυνότητας και γενικά την ασφάλεια και υγιεινή.

As a common practice, restoration projects of ancient colonnades have to deal with joining together fragments of architectural members using threaded titanium bars (rein- forcement) fixed into place with cement mortar. The basic criterion for the design of such connections is that, in case of a seismic event, the reinforcement should absorb the seismic energy and fail before the marble suffers any damage. For the dimensioning of the titanium bars, a methodology based on the capacity design philosophy is usually implemented. The ac- curate calculation of the forces that will be induced to the reinforcement during an earth- quake is not an easy task, since the response of the structure is governed by the rocking and the sliding of the individual stone blocks. In this paper, the efficiency of the reinforcement used for the connection of complements, which has been calculated with the above-mentioned capacity design methodology, is investi- gated for selected severe seismic excitations....

In the Acropolis of Athens restoration project it is very often to come across significant fractures on the architectural marble members. The common practice of the restoration work is to join the marble fragments together with threaded titanium bars, inserted into drilled holes inside the marble and fixed into place with cement mortar. The estimation of the design loads of structures such as the Acropolis monuments is a very difficult task especially when the seismic response is concerned. For this reason elaborate and accurate methods and analytical tools have been used with very good results. At the recent times discrete elements analysis seems to predict accurately enough the response of these structures and provides a time effective method as opposed to the use of finite element analysis. But the use of such methods for calculating the required reinforcement in each fracture is not yet feasible in a large scale, thus simplified methods are still used to facilitate the work on the site. The methodology of calculating the required reinforcement so far consisted of simplified two dimensional analogies of the fractures and the reinforcement as well as the loading conditions. This article presents a concise and simplified methodology for the calculation of the required reinforcement for fragmented architectural members taking into account the effects of the three spatial dimensions (geometry of the fracture, geometry of the reinforcement and geometry of the loading). In this approach the problem of calculating the expected tension of the reinforcement in complicated spatial forms of fracture is dealt with. The important features and requirements meant to be kept by this project was that the final product should maintain the character of an easy to use and accessible tool that would respond in real time to facilitate the work of the civil engineers on the site. Nel progetto di restauro dell'Acropoli di Atene molto spesso ci si imbatte in fratture significative sulle membrature architettoniche in marmo. La pratica comune dei lavori di restauro è quello di unire i frammenti di marmo insieme con barre filettate in titanio, inserite in fori praticati nel materiale lapideo e fissati in posizione con malta cementizia. La stima dei carichi di progetto di strutture come i monumenti dell'Acropoli è un compito molto difficile, soprattutto quando si considera la risposta sismica. Per questa ragione sono stati impiegati con ottimi risultati metodi elaborati e precisi e strumenti analitici. Recentemente l'analisi basata sugli elementi discreti sembra predire abbastanza accuratamente la risposta di queste strutture e fornisce un metodo efficace di tempo rispetto all'uso dell'analisi basata su elementi finiti. Ma l'impiego di tali metodi per calcolare l'armatura richiesta da ciascuna frattura non è ancora applicabile su larga scala, così, per facilitare il lavoro sul sito, si utilizzano ancora metodi semplificati. Fino ad ora, il metodo di calcolo per le armature necessarie consisteva nell'adottare analogie dimensionali semplificate per le fratture, per l'armatura e per le condizioni di carico. L'articolo illustra un metodo sintetico e semplificato per il calcolo dell'armatura richiesta per elementi architettonici frammentati, tenendo conto degli effetti delle tre dimensioni spaziali (geometria della frattura, geometria del rinforzo metallico e geometria del carico). In questo approccio si tiene conto del problema del calcolo della tensione prevista dell'armatura in complesse forme spaziali di frattura. Le ricadute più significative del progetto sono in un prodotto finale che abbia il carattere di uno strumento accessibile e facile da usare, in grado di rispondere in tempo reale e facilitare così il lavoro degli ingegneri civili sul sito.