Suchergebnisse

It is now known that the use of Building Information Modeling (BIM) procedures offers many benefits in the design and management of buildings. According to recent legislative enactments the BIM procedures will become mandatory for Public Works as from 2019. There are several advantages by using BIM procedures, among them the following can be highlighted: gaining a clear overview of the building plant system, evaluating the spatial coherence of the plant networks, the evaluation of the interferences to keep the system do not interfere with the functionality or the aesthetics of built environments. The present work analyzes the BIM procedures with particular reference to air conditioning systems in existing buildings, to their performance and management characteristics. The objective consists of analyzing the different BIM procedures and critically comparing the information provided by the IFC standard published by the European Institution Building SMART International, recognised as a standard by ISO, with the main reference standards for building installations and facilities design.

The acoustic performance is more and more often a requirement in the construction of both private buildings and public buildings. Internationally, over the last few years we have witnessed the revision and issue of new standards relating to the project phase (calculation of the performance) based on the ISO 12354 series, and the post-building verification phase based on ISO 16283 standards. Fundamental aspects to achieve high performance consist of achieving a level of details that is increasingly high and shareable. Building information modeling, in addition to being mandatory for some types of work, is increasingly used by designers and construction companies, to gain greater knowledge of the specific case in particular and of methods of execution. In the present work a calculation code is presented which, taking advantage of the BIM model information, allows the calculation of the performance, the check of the legislative limits and the integration of the post-building data instrumentally recorded. Finally the code was tested on the considered case study and monitored in the different building phases.

The new European Directive 2014/24 / EU requires for all member States the use of BIM procedures in the construction of public buildings. The countries belonging to the European Union shall be obliged to transpose the Directive and adapt their procedures to that effect. The paper analyzes the IFC format, the only recognized by the European Directive Standards for BIM procedures, in order to assess its use for simulations of buildings. IFC, described by the ISO 16739 (2013), is today a standard that describes the topology of the constructive elements of the building and what belongs to it overall. The format includes geometrical information on the room and on all building components, including details of the type for performance (transmittance, fire resistance, sound insulation), in other words it is an independent object file for the software producers to which, according to the European Directive, it will be compulsory to refer in the near future, during the different stages of the life of a building from the design phase, to management and possible demolition at the end of life. The present study aims at carrying out a first analysis on the IFC data format, which will be further deepened in successive phases. The study will compare the information and data contained in it, with those in other formats already used for energy simulations of buildings such the gbXML (Green Building XML), highlighting the missing required information and proposing the inclusion of new data for energetic and acoustic simulation. More generally the attention is focused on the building physics simulation software which is implemented to exploit the BIM model potential enabling interoperability.