1,720,994 research outputs found
Structural Design and Project Management: a Multi-Criteria Analysis to select the optimal seismic retrofit strategy for systems of complex buildings
No full textThe selection of the optimal strategy to seismically upgrade an existing building is a difficult problem. The difficulty increases in case of a complex buildings system with different strategic requirements in terms of organization layout and structural features. The questions concerns issues such as the complexity to combine management and technical strategies, especially in situations of comparable costs, and the selection of the optimal strategy in a range of possible solutions. It is demonstrated that the best way for influencing final cost obtaining stakeholders’ satisfaction is to intervene at the beginning of Design Stages.
In this contribution we present the implementation of a structured methodology of project management supported by Information Technology for the constructability performance evaluation of different seismic retrofit scenarios in order to choose the optimal retrofit solution in a complex buildings system. Evaluation criteria, using different constructability attributes, combined with evaluation systems are used to grade the different retrofit strategies.
The procedure intends to control building management during constructive phases since the early stage of the project. This is possible through the simulation of construction site in all the different prefigured scenarios. Managing the results in some specific tables, with a specific evaluation system it is possible to assess alternative management strategies. Similarly, taking information from a preset database, the procedure grades technical strategies. Finally combining structural and constructive strategies, the optimal retrofit solution is chosen.
Business Intelligence –mathematical models and decision making systems- applied to BIM technology for optimizing construction process during design phase is further future development in the industrial perspective
A Decision Support System (DSS) for constructability assessment in seismic retrofit of complex buildings
Full text linkChoosing the optimal strategy for the seismic retrofit of an existing building is a difficult problem. This difficulty increases in the case of complex buildings systems with different strategic requirements in terms of organization layout and structural features. This paper contributes to solving this complexity by combining management and technical strategies, especially in situations of comparable times and costs. It is demonstrated that the best way to obtain final results that are consistent with the initial requirements is to intervene at the beginning of the design stage. To this end the implementation of a Decision Support System (DSS) aided by Information Technology (IT) is presented for making a constructability assessment of the seismic retrofit of complex buildings. Different seismic retrofit scenarios compete to be the optimal retrofit solution. Several evaluation systems are combined with classic constructability-based tools to produce an organic framework. A rule-based engine that utilizes this framework can be implemented on top of user-friendly software. The DSS intends to control building management by prefiguring a real ongoing building execution after the early stages of the project. This is made possible by using the simulation of site safety layout in all compatible scenarios. By managing the output data of IT models it is possible to assess both management and structural strategies. In the end the DSS combines them to choose the most favorable overall solution. Looking towards future development, it can be seen that applications of a BIM Platform integrated with the proposed DSS have considerable potential in construction management practice
HBIM and Fire Prevention in Historical Building Heritage Management
No full textItaly possesses a unique cultural heritage that is constantly under threat from natural and anthropic risks: fire vulnerability is one of the main causes of architectural heritage destruction. The goal of this work is to propose a methodological approach to the management and preservation of historical building heritage with respect to fire safety. This approach aims to facilitate the process of analysis, design and fire management in historical buildings, using automated procedures based on HBIM (Historical BIM) processes. BIM can be used effectively in the digitization of cultural heritage: HBIM enables the three-dimensional modeling of the building by means of parametric objects, to which infographic information is associated, related to an appropriate Level of Development (LoD). A workflow process has been defined to set up a procedure for best practices which can guarantee the correct interoperability between BIM programs and fire safety design. The procedure, based on the exchange of IFC files, shows result applying analysis through Model Checking software of Model Checking and shows limited interoperability with fire safety software. The procedure has been validated through real tests and measurements, by comparing data obtained from a traditional fire prevention analysis with the data gathered from the automated procedure. The real case study is the ?Command Building? of the School of Air Warfare in Florence. Results mainly indicate that fire safety in historical buildings should always be managed using a performance-based approach (interoperability issue between HBIM and fire safety software)
Constructability and safety performance based design: a design and assessment tool for the building process
No full textThe theme of this contribution fits astride two strands of Construction Management Studies: “health and safety risk management” on construction site and “constructability” design approach. Specifically we faces two problems usually considered separately: the lack of specificity, synergy, effectiveness between safety planning and construction process and the lack of concurrence between design and construction process. The proposed approach assigns to design the key role of optimizing both constructability and safety planning in a unique and simultaneous procedure. The purpose is to improve “working plan” design level by specific construction simulation and the related safety assessment in the perspective of the better constructability performance and final building results. The proposed method is a Construction Management Approach supported by design tool based on working directly on design drawings. Starting from the representation of construction details, their construction can be simulated. This is obtained analyzing construction details by means of progressive drawings that express and simulate the breakdown of construction phases, chronologically processed and logically related. In these specific drawings all the elements of the construction site are graphically placed. The procedure allows both to perform the specific and detailed safety assessment for the realization of construction detail components, and to verify the constructability of them. The safety and constructability analysis is so performed in a graphical way during the design process not waiting the construction phase. So we are still able to intervene, if necessary, with amendments under the designer control
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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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