Current revision of the fundamental Eurocode for design of civil engineering structures

Vestnik MGSU 9/2018 Volume 13
  • Marková Jana - Klokner Institute, Czech Technical University (CTU), in Prague, 7 Šolínova, Prague 6, 166 08, Czech Republic ssociated Professor; ORCID ID 0000-0002-9674-0718, Klokner Institute, Czech Technical University (CTU), in Prague, 7 Šolínova, Prague 6, 166 08, Czech Republic, 7 Šolínova, Prague 6, 166 08, Czech Republic.
  • Holický Milan - Klokner Institute, Czech Technical University (CTU), in Prague, 7 Šolínova, Prague 6, 166 08, Czech Republic Professor; ORCID ID 0000-0001-5325-6470, Klokner Institute, Czech Technical University (CTU), in Prague, 7 Šolínova, Prague 6, 166 08, Czech Republic, 7 Šolínova, Prague 6, 166 08, Czech Republic.
  • Sýkora Miroslav - Klokner Institute, Czech Technical University (CTU), in Prague, 7 Šolínova, Prague 6, 166 08, Czech Republic Associated Professor; ORCID ID 0000-0001-9346-3204., Klokner Institute, Czech Technical University (CTU), in Prague, 7 Šolínova, Prague 6, 166 08, Czech Republic, 7 Šolínova, Prague 6, 166 08, Czech Republic.

Pages 1036-1042

The present, globally-applicable revision of the fundamental EN 1990 Eurocode for the design of buildings and civil engineering structures is briefly summarised. General requirements are further elaborated with respect to structural resistance, serviceability and durability. In addition, provisions for robustness, sustainability and fire safety are included. An appropriate level of structural reliability should consider the consequences and possible causes of failure, public aversion and costs associated with reducing the risk of failure. However, the choice concerning the reliability level is left to national interpretation. The target reliability indexes are indicated for one-year and 50-year reference period, with no explicit link to the design working life being provided in the final draft of prEN 1990. It is proposed that the consequences of structural failure be organised into five categories; however, without providing recommendations on the target reliability indices for the lowest and highest consequence class. Supplementary guidance on structural robustness is proposed in prEN 1990, Annex E. A structure should have a sufficient level of robustness that it will not be damaged to an extent disproportional to the original cause. The working life design should be considered for time-dependent performance of the structures. Ultimate and serviceability limit states should be verified for all relevant design situations. Apart from the commonly-used partial factor method, which comprises a basic method for structural verification, additional guidance is also given for application of non-linear methods. The partial factors have been newly-calibrated with the aim of achieving a more balanced reliability level for structures from different materials and loading effects.

DOI: 10.22227/1997-0935.2018.9.1036-1042

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Treatment of external thermal insulation composite systems (ETICS) with bio corrosion with respect to environment protection

Vestnik MGSU 9/2018 Volume 13
  • Antošová Naďa - Slovak University of Technology in Bratislava associate professor of the Department of Building Technology, Slovak University of Technology in Bratislava, 11 Radlinského, Bratislava, 813 68, Slovakia.
  • Minarovičová Katarína - Slovak University of Technology in Bratislava senior lecturer of the Department of Building Constructions, Faculty of Civil Engineering, Slovak University of Technology in Bratislava, 11 Radlinského, Bratislava, 813 68, Slovakia.
  • Belániová Barbora - Slovak University of Technology in Bratislava Postgraduate student of the Department of Building Technology, Faculty of Civil Engineering, Slovak University of Technology in Bratislava, 11 Radlinského, Bratislava, 813 68, Slovakia.

Pages 1106-1111

Subject: the treatment of External Thermal Insulation Composite Systems (ETICS) surfaces affected by bio-corrosion takes place as a part of planned or operational maintenance. As part of this process, ambient environments are loaded with running water and detergents that contain heavy metals. The article presents the results of research on reducing the impact of environmental contamination by cleaning and preventive coating of ETICS surfaces with biocides. The paper gives an overview of the problem and new approaches to the treatment of new and renovated buildings. Purposes: at the present time, the maintenance of existing ETICS lacks system solutions, instead using chemical methods for the treatment of contamination by microorganisms. While complete information on environmental impacts is lacking it is necessary to take this into consideration. The cost of renovation, which should include investment for future treatment of ETICS surfaces, is often underestimated. Film preservation biocides contain both algaecides and fungicides. Consequently, ETICS preservation agents in exterior paints and renders represent a potential risk for humans, animals and the wider biological environment and new concepts underlying more sustainable approaches are required. Materials and methods: the research was based on an evaluation of existing technologies for eliminating microorganisms from the ETICS surfaces and an analysis of their environmental effects. The aim was to find optimal operational and planned ETICS maintenance approaches that minimise negative environmental effects. Results: environmentally-friendly approaches were identified and a new leaching system for safe dewatering was designed. These approaches differ according to their suitability for periodic or operational maintenance. Conclusions: there is a wide range of materials used for ETICS finishes. It is important to consider the reliability and maintainability of the construction across the entire life cycle of a building. Operation and maintenance should be a significant element of the life-cycle cost of a building. The removal of bio corrosion coatings from ETICS structures by means of chemical and preservative substances (biocides) is currently the most-used and only effective technology. The uncontrolled release of applied chemicals is unacceptable. A system designed for collecting wastewater from the cleaned surface is considered an effective means of reducing the deleterious effects of biocidal substances on the environment. The safe dewatering of chemicals leached from the surface of the facade is presented by a drain system designed in accordance with the building type, use and age.

DOI: 10.22227/1997-0935.2018.9.1106-1111

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COGNITIVE TECHNOLOGIES AS AN IMPERATIVE OF THE SUSTAINABLE DEVELOPMENT OF INNOVATIVE ACTIVITY IN THE CONSTRUCTION

Vestnik MGSU 6/2016
  • Uvarova Svetlana Sergeevna - Voronezh State University of Architecture and Civil Engineering (Voronezh GASU) Doctor of Economical Sciences, Associate Professor, Department of Economy and Bases of Entrepreneurship, Voronezh State University of Architecture and Civil Engineering (Voronezh GASU), 84 20-letiya Oktyabrya str., Voronezh, 394006, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kankhva Vadim Sergeevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Economical Sciences, Associate Professor, Department of Economy and Management in the Construction, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoye Shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Rogacheva Yana Andreevna - Voronezh State University of Architecture and Civil Engineering (Voronezh GASU) postgraduate student, Department of Economy and Bases of Entrepreneurship, Voronezh State University of Architecture and Civil Engineering (Voronezh GASU), 84 20-letiya Oktyabrya str., Voronezh, 394006, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 90-100

The authors substantiated the role of cognitive technologies in the process of sustainable development, including the construction and investment complex. The role of subsystem of human resources management is shown in the conditions of knowledge-based economy formation. The authors discovered the criteria of sustainable development of the economy with the focus on the innovative aspect. The methodology of using cognitive technologies is offered on the example of construction of ecological housing, which is a core direction of the sustainable development of the construction and investment complex.

DOI: 10.22227/1997-0935.2016.6.90-100

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