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Abstract

The constant increase in the population of cities affects the development of housing. Investors, in their activities related to the profit from the sale of flats, focus on the completion of residential buildings, which must be timely and in accordance with the budget assumptions. Therefore, there is a problem concerning the correct planning of the costs and duration of an investment. The aim of the conducted research was to determine the shape and course of the cost curves for construction projects related to the construction of residential buildings. Based on the analysis of the authors’ own studies carried out in a homogeneous research group of 11 residence buildings, an original attempt was made to determine the area of the curve, which indicates the area of correct planning of cumulative costs and the forecasting of their deviations in the financial outlays of construction projects. By knowing the planned cost and duration of a construction project, and by using the proposed 6th degree polynomial, it is possible to determine the planned monthly work and expenditure amounts, and thus correctly plan the investment costs over time. It was proven that the planned work and expenditure advancement of the housing construction sector is greater in the first stage of its implementation when compared to the actual state. The determined 6th degree polynomials describe the regularity that shows that for half of the planned duration of works, the planned work and expenditure advancement is approx. 46%, while the actual advancement is approx. 35%.
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Authors and Affiliations

Mariusz Szóstak
1
ORCID: ORCID

  1. Wrocław University of Science and Technology, Faculty of Civil Engineering, Department of Building Engineering, 27 Wybrzeze Wyspianskiego St., 50-370 Wrocław
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Abstract

Investors are obliged to carry out construction processes based on the binding rules and regulations. However, these regulations are constantly evolving and subject to various attempts of improvement. Therefore, the aim of this article is an attempt to present the changes that have recently occured in the Polish process of construction process of a single-family residential building, in the context of proceedings before architectural and construction administration authorities. Basic legal acts regulating this procedure have been amended, such as: the Construction Law Act and the Regulation of the Minister of Development on the detailed scope and form of a construction design. Since these regulations have changed their provisions many times over the years, the article focuses on the changes that entered into force during 2020 and 2021. An additional aim of the article is to check and show how these changes were adopted by both investors and participants in the construction process, such as designers. In order to achieve this goal, a survey was conducted among them in Mał opolska region. The data concerning the submitted applications for permits for the construction of a single-family residential building, within the mentioned years, have been analyzed.
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Authors and Affiliations

Marcin Kowalik
1
ORCID: ORCID
Wojciech Drozd
1
ORCID: ORCID

  1. Cracow University of Technology, Faculty of Civil Engineering, Division of Management in Civil Engineering, ul. Warszawska 24, 31-155 Kraków, Poland
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Abstract

With the development of the society in recent years, there are more and more housing construction areas. The traditional concrete has not been able to satisfy the demand of housing construction. In this study, prefabricated concrete was applied in the design of assembling style houses considering their characteristics, and its economic, environmental and social benefits were analyzed combining risk matrix evaluation method and management strategy. It was found that the use of prefabricated concrete as a building material could effectively shorten the construction period, reduce the construction cost and improve the construction safety, playing a role of energy saving and environmental protection. Therefore it was concluded that prefabricated concrete can improve the efficiency of construction, reduce environmental pollution and save energy. This work provides a reference for the application of prefabricated concrete in residential buildings and its safety management.

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Authors and Affiliations

L. Jiao
X.D. Li
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Abstract

The article discusses the technical condition of buildings. An attempt was made to compare the technical condition and the degree of technical wear of two multi-family residential buildings erected at the interval of 25 years. The list of such objects is intended to illustrate that even relatively young buildings may exhibit differing levels of wear and technical condition of building elements.

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Authors and Affiliations

Wojciech Drozd
ORCID: ORCID
Marcin Kowalik
ORCID: ORCID
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Abstract

The escalating prevalence of rooftop solar PVs and DC powered home appliances are the driving forces for the research in the field of DC distribution at residential level. The current research work presents comparative analyses of AC and DC distribution systems considering various scenarios for the specific purpose of efficiency/energy savings. A modern Bakersfield CA, USA home is considered for the analyses. The loads are classified according to the power demand. Rooftop solar PVs are also included in each residential building. Mathematical equations are devised for the efficiency analysis of residential buildings powered with AC as well as DC. The results reveal strong dependence of the efficiency values on the utilization/types of loads, efficiencies of the power electronic converters (PECs), solar capacity and seasonal conditions, as a function of the time of day. It is concluded that AC system presents better efficiency values as compared to the DC counterpart except during the time periods when solar power is available and when the penetration of variable speed drive (VSD) based loads is high.
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Bibliography

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Authors and Affiliations

Faraz Ahmad
1 2
Faizan Dastgeer
2
ORCID: ORCID
Hasan E. Gelani
2
ORCID: ORCID
Sidra Khan
3
Mashood Nasir
4
ORCID: ORCID

  1. University of Georgia College of Engineering, USA
  2. University of Engineering and Technology Lahore-FSD Campus, Pakistan
  3. Electrical Engg Dept, CIIT Lahore, Pakistan
  4. Energy Technology, Aalborg University, Denmark
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Abstract

The article presents method of assessment of one of the three basic aspects of sustainable construction concerning social utility properties of residential buildings. The study was based on the recommendations of standards [1] and [2], on the basis of which the area of features characterizing the social aspect of buildings was determined. Additionally, the presented method includes criteria which are necessary for the assessment of this aspect, and which are not included in the normative guidelines. The presented method fits in with the current trend of sustainable construction. This method enables and facilitates the comparison of social utility properties in different residential buildings. It is also allows for the classification of buildings according to the degree to which they meet their social utility properties; that can be a practical tool to support the decision on the future of the building (i.e., the sequence of necessary refurbishments) or the decision to buy or sell the property by indicating its strengths and weaknesses. By developing a way to assess a comprehensive set of criteria, the proposed method allows you to quickly and easily assess the social quality of residential buildings. In addition, the proposed measures for individual criteria can easily be adapted to requirements in other countries. The proposed “star” classification can also be used as a universal scale for assessing the social quality index of buildings.
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Bibliography


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Authors and Affiliations

Aleksandra Radziejowska
1
ORCID: ORCID

  1. AGH University of Science and Technology in Cracow, Department of Geomechanics, Civil Engineering and Geotechnics, Av. Mickiewicza 30, 30-059 Cracow, Poland
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Abstract

Cost overrun during construction is one of the most common problems occur in construction projects around the world, which also includes the area of Chongqing in China. At present, there are few studies related to cost overruns at the construction stage of high-rise residential building projects (HRBPs) in Chongqing. The purpose of this study is to develop effective control measures from the contractor’s perspective to help projects to minimize cost overruns during the construction phase of HRBPs in Chongqing. Firstly, through the literature review and semi-structured interviews, 65 cost overrun-related risk factors in construction projects were identified. All the risk factors have been prioritized through the analytic hierarchy process (AHP) based on their importance to project success. Out of the 65 factors identified, 12 were classified as the critical ones that have a great potential to instigate a cost overrun during construction to take place in the real project. There were four risk factors that have the greatest impact on cost overruns, and their weights were 0.04 or above, including low bid, force majeure, undetailed/inaccurate geological survey data, and increased loan interest rates. Finally, control measures were developed for these four critical cost overrun risk factors (CCORFs). The measures developed provided a guideline to control the risk of cost overruns and clear control key points to help contractors minimize cost overruns on construction projects.
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Authors and Affiliations

Yuee Wang
1
ORCID: ORCID
Farid Ezanee Mohamed Ghazali
1
ORCID: ORCID

  1. School of Civil Engineering, Engineering Campus, University Sains Malaysia,Seri Ampangan, 14300 Nibong Tebal, Seberang Perai Selatan, Pulau Pinang, Malaysia

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