Experimental Verification of Demountable Precast Column System

2016 ◽  
Vol 827 ◽  
pp. 259-262 ◽  
Author(s):  
Aleš Polák

Relocation of existing concrete structures requires full or partial demolition, which consumes a lot of energy and thus has a negative impact on the environment. From environmental point of view, demountable precast structures are sustainable. They allow “recycling” to the level of precast elements and so they save significant amounts of energy and materials. Another advantage of these structures is quick assembly without wet processes. A characteristic component of precast reinforced concrete construction system for multi-storey buildings are demountable joints of load-bearing precast reinforced concrete elements. This paper is focused on experimental verification of demountable precast column structure and its demountable steel joints. The experimental research was carried out within TA02010837 “Multipurpose dismantleable prefabricated reinforced concrete building system with controlled joint properties and possibility of repeated use”.

Author(s):  
Jiri Witzany ◽  
Daniel Makovicka ◽  
Radek Zigler ◽  
Tomas Cejka ◽  
Stanislav Pospisil ◽  
...  

The spatial stability and controlled dynamic characteristics of an articulated precast column system are secured by thin-walled reinforced concrete diaphragms elastically embedded in some bays by means of special damping bearings. The intensity and the range of the load-bearing system’s response to dynamic (e.g. seismic) effects and vibrations are achieved by the stiffness adjustment of damping bearings. The stiffness of damping bearings may also be adjusted during exploitation. The designed structure with an elastically embedded diaphragm has been exposed to dynamic testing whose results are presented in the article. Another significant characteristic of the precast structure is its dry assembly and potential disassembly and relocation to another site. The experimental and theoretic analyses performed have confirmed the assumptions for the system’s application in areas with the occurrence of natural seismicity.


2019 ◽  
pp. 22-29
Author(s):  
Н. В. Фрадкіна

The purpose and tasks of the work are to analyze the contemporary Ukrainian mass culture in terms of its value and humanistic components, as well as the importance of cultural studies and Ukrainian studies in educational disciplines for the formation of a holistic worldview of modern youth.Analysis of research and publications. Scientists repeatedly turned to the problems of the role of spirituality in the formation of society and its culture. This problem is highlighted in the publications by O. Losev, V. Lytvyn, D. Likhachev, S. Avierintsev, M. Zakovych, I. Stepanenko and E. Kostyshyn.Experts see the main negative impact of mass culture on the quality approach, which determines mass culture through the market, because mass culture, from our point of view, is everything that is sold and used in mass demand.One of the most interesting studies on this issue was the work by the representatives of Frankfurt School M. Horkheimer and T. Adorno «Dialectics of Enlightenment» (1947), devoted to a detailed analysis of mass culture. Propaganda at all socio-cultural levels in the form is similar in both totalitarian and democratic countries. It is connected, according to the authors, with the direction of European enlightenment. The tendency to unify people is a manifestation of the influence of mass culture, from cinema to pop. Mass culture is a phenomenon whose existence is associated with commerce (accumulation in any form – this is the main feature of education), in general, the fact that it exists in this form is related to the direction of the history of civilization.Modern mass culture, with its externally attractive and easily assimilated ideas and symbols, appealing to the trends of modern fashion, becomes a standard of prestigious consumption, does not require intense reflection, allows you to relax, distract, not teach, but entertains, preaches hedonism as the main spiritual value. And as a consequence, there are socio-cultural risks: an active rejection of other people, which leads to the formation of indifference; cruelty as a character trait; increase of violent and mercenary crime; increase in the number of alcohol and drug addicts; anti-patriotism; indifference to the values of the family and as a result of social orphanhood and prostitution.Conclusions, perspectives of research. Thus, we can conclude that modern Ukrainian education is predominantly formed by the values of mass culture. Namely, according to the «Dialectic» by Horkheimer and Adorno, «semi-enlightenment becomes an objective spirit» of our modern society.It is concluded that only high-quality education can create the opposite of the onset of mass culture and the destruction of spirituality in our society. It is proved that only by realizing the importance of cultivating disciplines in the educational process and the spiritual upbringing of the nation, through educational reforms, humanitarian knowledge will gradually return to student audiences.Formation of youth occurs under the influence of social environment, culture, education and self-education. The optimal combination of these factors determines both the process of socialization itself and how successful it will be. In this context, one can see the leading role of education and upbringing. It turns out that the main task of modern education is to spread its influence on the development of spiritual culture of the individual, which eventually becomes a solid foundation for the formation of the individual. Such a subject requires both philosophical and humanitarian approaches in further integrated interdisciplinary research, since the availability of such research will provide the theoretical foundation for truly modern educational and personal development.


Currently, prefabricated reinforced concrete structures are widely used for the construction of buildings of various functional purposes. In this regard, has been developed SP 356.1325800.2017 "Frame Reinforced Concrete Prefabricated Structures of Multi-Storey Buildings. Design Rules", which establishes requirements for the calculation and design of precast reinforced concrete structures of frame buildings of heavy, fine-grained and lightweight structural concrete for buildings with a height of not more than 75 m. The structure of the set of rules consists of eight sections and one annex. The document reviewed covers the design of multi-story framed beam structural systems, the elements of which are connected in a spatial system with rigid (partially compliant) or hinged joints and concreting of the joints between the surfaces of the abutting precast elements. The classification of structural schemes of building frames, which according to the method of accommodation of horizontal loads are divided into bracing, rigid frame bracing and framework, is presented. The list of structural elements, such as foundations, columns, crossbars, ribbed and hollow floor slabs and coatings, stiffness elements and external enclosing structures is given; detailed instructions for their design are provided. The scope of the developed set of rules includes all natural and climatic zones of the Russian Federation, except seismic areas with 7 or more points, as well as permafrost zones.


Author(s):  
V.N. Kurdyukov ◽  
◽  
T.V. Lebedeva ◽  

The article considers common classifications of measures to reduce environmentaleconomic damage from motor vehicles. Classification from the point of view of control impact is proposed, which allows to take into account relations between the state and citizens in the field of reduction of negative impact of motor vehicles on the environment. The analysis of the classification made it possible to identify areas of activity for improving the efficiency of management impacts, taking into account the incentives of citizens to comply with the requirements of the legislation and to create conditions for their exceeding. Increasing the efficiency of resource allocation in the Territory will allow the released funds to be allocated to the development of industry, agriculture, education and science.


2020 ◽  
pp. 127-129
Author(s):  
Ž. P. Cuckič

At the end of a decade-long research work at the Moravamont plant in Gnjilane, a new completely prefabricated building system was created from reinforced concrete and prestressed precast elements on the track, which was called Moravamont 2000. Presented in paper final results demonstrates that the construction is well and rationally designed, that the construction behaviour for the maximum expected earthquake effects with a return period of 500 years, according to the criterion of regulation, is resistant and resistant to an earthquake without major damage.


2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Marina Maffoni ◽  
Anna Giardini ◽  
Antonia Pierobon ◽  
Davide Ferrazzoli ◽  
Giuseppe Frazzitta

Parkinson’s disease (PD) is a neurodegenerative disease characterized by motor and nonmotor symptoms. Both of them imply a negative impact on Health-Related Quality of Life. A significant one is the stigma experienced by the parkinsonian patients and their caregivers. Moreover, stigma may affect everyday life and patient’s subjective and relational perception and it may lead to frustration and isolation. Aim of the present work is to qualitatively describe the stigma of PD patients stemming from literature review, in order to catch the subjective experience and the meaning of the stigma construct. Literature review was performed on PubMed database and Google Scholar (keywords: Parkinson Disease, qualitative, stigma, social problem, isolation, discrimination) and was restricted to qualitative data: 14 articles were identified to be suitable to the aim of the present overview. Results are divided into four core constructs: stigma arising from symptoms, stigma linked to relational and communication problems, social stigma arising from sharing perceptions, and caregiver’s stigma. The principal relations to these constructs are deeply analyzed and described subjectively through patients’ and caregiver’s point of view. The qualitative research may allow a better understanding of a subjective symptom such as stigma in parkinsonian patients from an intercultural and a social point of view.


2018 ◽  
Vol 149 ◽  
pp. 01022 ◽  
Author(s):  
Khadra Bendjillali ◽  
Mohamed Chemrouk

The valorisation of industrial waste in the field of construction became a very interesting axis of research from scientific, economic and environmental point of view. We have conducted this work to study the effect of the addition of polypropylene fibres waste on the mechanical behaviour of reinforced concrete beams subjected to a simple flexural loading, with and without transversal reinforcement. The used fibres are coming from the waste of the fabrication of domestic brushes and sweeps; they have an average diameter of 0.47 mm and a length between 40 and 60 mm. Two weight dosages of fibres are used, 0.25 and 0.5 %. The experimental results showed that the incorporation of polypropylene fibres waste into the concrete affects negatively its workability, but its flexural and compressive strength are improved. The fibers have presented a significant contribution on the shear behavior and the cracking of beams, particularly in absence of transversal bars. The waste used in this work as fibrous reinforcement has not only increased the ductility of reinforced concrete beams, but it have also provided a perfect cracking distribution on the concrete surface and it has participated in a considerable way in the reduction of cracks number and dimensions, which allows to ensure the material durability and then the structure longevity. The reinforcement of concrete beams with 0.5 % of polypropylene fibers waste with a minimal steel bars can ensure an excellent mechanical behavior in shear, as in flexion.


2018 ◽  
Vol 8 (4) ◽  
pp. 180
Author(s):  
Ogbette, Afamefuna Samuel ◽  
Idam, Macben Otu ◽  
Kareem, Akeem Olumide

This study examined the impact of Special Anti-Robbery Squad (SARS) in Nigeria. It solely depended on the secondary source for information. SARS is one of the Nigeria Police Force units that is saddled with the responsibility of fighting crime in the society; specifically, robbery and kidnapping. The impact was examined in two ways: Positive and Negative impact. From the positive point of view, SARS has been able to reduce robbery and kidnapping to an extent but unfortunately, people now use them as bodyguards to intimidate, suppress, and harass other people. From our findings, SARS tortures people mercilessly, extort, beat, kill and jail people who are not forthcoming with their demands. It was also discovered that, most of them lacks orientation on human relation which is a big gap the Nigeria Police Force need to cover by re-orienting them. Again, it was discovered that some of the personnel smoke and drink. They are often intoxicated while on duty, wielding sophisticated guns. From the study, the following recommendations were made: control measures should be put in place for SARS to be stopped from torturing people. They should equally be stopped from extorting, beating, killing (except in a battle ground) and framing people up just to be jailed. Investigative jobs as that of SARS should be exclusively for graduates in the Police Service. Again, the Nigeria Police Force and Nigeria Police Service Commission need to often re-orient these officers on human relations. Finally, officers caught drinking or smoking (especially hard drugs) on duty should be properly dealt with to serve as a deterrent to others.


2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Bartosz Rymkiewicz

Organizational reporting is the most important tool of communication between an enterpriseand its stakeholders. However, it is not a static tool but continues to develop and adapt to ongoingeconomic and social changes. Formerly covering only financial information; currently, it is supplementedby a wide range of non-financial information relating to all aspects of the business. The evolution ofreporting is particularly fostered by the rapid development of the concepts of corporate socialresponsibility and sustainable development, as well as the progressing changes in the information needsof stakeholders. Enterprises are increasingly publishing voluntary reports concerning the social,environmental, and employment aspects of their business in addition to reports required by law. Thisresults in the multiplication of reports and duplication of content, which has a negative impact on thereports' usefulness. The solution to this problem may be integrated reporting, which integrates andinterconnects financial and non-financial disclosures. A milestone for the development of integratedreporting was the elaboration of integrated reporting guidelines by the International Integrated ReportingCouncil (IIRC) in December 2013. The aim of the paper is to present the development of integratedreporting in Poland in 2014-2020 on the example of public companies listed on the Warsaw StockExchange. The quality of reports was assessed from the point of view of compliance with IIRC guidelines,as well as their usefulness for stakeholders. Content analysis of corporate publications and comparativeanalysis was used for this purpose.


2019 ◽  
Author(s):  
Jamal Kaid Mohammed Ali ◽  
S. Imtiaz Hasnain ◽  
M. Salim Beg

Overindulgence in social networking, in general, and texting, in particular, is much in practice. It is cutting across various population boundaries and has almost assumed an endemic proportion. Its consequential impact on the standard language has acquired greater importance. This paper aims to determine the perceptions and attitudes of English Second Language (ESL) learners at Aligarh Muslim University towards the consequences of texting on Standard English. The data were collected through a five-point scale questionnaire from ninety students who were enrolled at Aligarh Muslim University during the academic year 2010-2011. The respondents completed a 16-item questionnaire. The students from which the data were collected were grouped according to their levels. The results indicate the negative impact of this new usage of the language in breaking the rules of English language and influencing their literacy. Moreover, the questionnaire results from respondents' point of view show that regardless of their heavy use of texting, most respondents have a negative attitude towards texting and they viewed it as a threat to Standard English.


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