Applied sciences

Archives of Civil Engineering

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Archives of Civil Engineering | 2016 | No 1 |

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Abstract

The object of the present study is to investigate the influence of damping uncertainty and statistical correlation on the dynamic response of structures with random damping parameters in the neighbourhood of a resonant frequency. A Non-Linear Statistical model (NLSM) is successfully demonstrated to predict the probabilistic response of an industrial building structure with correlated random damping. A practical computational technique to generate first and second-order sensitivity derivatives is presented and the validity of the predicted statistical moments is checked by traditional Monte Carlo simulation. Simulation results show the effectiveness of the NLSM to estimate uncertainty propagation in structural dynamics. In addition, it is demonstrated that the uncertainty in damping indeed influences the system response with the effects being more pronounced for lightly damped structures, higher variability and higher statistical correlation of damping parameters.

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Authors and Affiliations

B. Tiliouine
B. Chemali
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Abstract

Deriving the formulas for strain components, we are assuming, that cross-section of a rod being rotated in space during deformation does not need to be perpendicular to deformed centroid line. This not a quite intuitive assumption allows for more compact and easier formulas for strain tensor or equilibrium equations. Derived transformations between actual and initial coordinate system, components of strain tensor and virtual works principle for investigated spatially curved beams of bisymmetric cross-section are shown in this paper. Conformity with other models from referenced literature is also shown.

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Authors and Affiliations

R. Bijak
G. Kołodziej
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Abstract

The research paper presents the results of the dynamic analysis of an existing bar dome subjected to wind loads. The calculation model of the structure was constructed using the finite element method. The dome was subjected to the standard wind pressure, assuming that it is operates in a harmonic manner. The numerical analyses were performed with the application of Autodesk Robot and MES3D. The analysis focused on the impact of selected factors such as the frequency of forcing, wind gustiness coefficient and structural damping on the behaviour of structures.

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Authors and Affiliations

W. Szaniec
K. Zielińska
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Abstract

A large number of infrastructural concrete buildings are protected against aggressive environments by coating systems. The functionality of these coating systems is mainly affected by the composition and thickness of the individual polymeric layers. For the first time ever, a mobile nuclear magnetic resonance (NMR) sensor allows a non-destructive determination of these important parameters on the building site. However, before this technique can be used on steel-reinforced concrete elements, the potential effect of the reinforcement on the measurement, i.e. the NMR signal, needs to be studied. The results show a shift of the NMR profile as well as an increase of the signals amplitude in the case of the reinforced samples, while calculating the thickness of concrete coating leading to identical results.

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Authors and Affiliations

J. Orlowsky
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Abstract

The bonding state of the asphalt layers in a road pavement structure significantly affects its fatigue life. These bondings, therefore, require detailed tests and optimization. In this paper, the analyses of the correlation between the results of laboratory static tests and the results of fatigue tests of asphalt mixture interlayer bondings were performed. The existence of the relationships between selected parameters was confirmed. In the future, the results of these analyses may allow for assessment of interlayer bondings' fatigue life based on the results of quick and relatively easy static tests.

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Authors and Affiliations

A. Szydło
K. Malicki
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Abstract

This article discusses an integrated concept of sustainable building and of Building Information Modelling (BIM) by means of implementation of the Green BIM management method. Apart from presenting this innovative project management method with particular attention paid to solutions applied by Scandinavian enterprises, the article aims at analysing institutional conditions regarding application of the Green BIM within Polish construction companies. Arguments presented in the article are based on results of a scientific review and industry specific publications. Moreover, the article discusses case studies of projects completed with the implementation of the Green BlM method.

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Authors and Affiliations

K. Araszkiewicz
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Abstract

The problems related to construction production are multi-faceted and complex. This has promoted the search for different methods/approaches for analizing the data which supports the decision-making process in the construction industry. In the article the authors focus their attention on well-known methods and tools, and on some new approaches to solving decision-making problems. The aim of the article is to analyze the methods used to analyse data in a construction company, convey their advantages and disadvantages, and specify the degree of efficiency in the discussed area.

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Authors and Affiliations

A. Dziadosz
A. Kończak
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Abstract

This paper presents a model of scheduling of multi unit construction project based on an NP-hard permutation flow shop problem, in which the considered criterion is the sum of the costs of the works' execution of the project considering the time of the project as a constraint. It is also assumed that each job in the units constituting the project may be realized in up to three different ways with specific time and cost of execution. The optimization task relies on solving the problem with two different decision variables: the order of execution of units (permutation) and a set of ways to carry out the works in units. The task presented in the paper is performed with the use of a created algorithm which searches the space of solutions in which metaheuristic simulated annealing algorithm is used. The paper presents a calculation example showing the applicability of the model in the optimization of sub-contractors' work in the construction project.

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Authors and Affiliations

M. Podolski
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Abstract

During the planning and controlling of the construction process, most attention is focu sed on risk analysis, especially in the context of final costs and deadlines of the investment. In this analysis, the primary and most significant concern is the proper identification and quantification of events, which on a certain level of probability may affect the development process. This paper presents the result of a risk analysis for a particular building object, made after completion of the investment and accepting it for use. Knowledge of the planned values and the actual investment process allowed for the identification of the events and their effects that in this case have significantly disrupted the investment process. The limited total cost of the investment project in question had a considerable impact on the progress of the project execution. Despite three transitions of administrative procedures, the opening date of the shopping centre was delayed by only three weeks.

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Authors and Affiliations

M. Lendo-Siwicka
M. Połoński
K. Pawluk
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Abstract

This paper identifies the adverse events occurring during the execution of water supply and sewerage systems construction. The basis for this paper is research conducted in 2010-2014 on the construction sites of water supply and sewerage systems located in the provinces of Lower Silesia and Opole. The research consisted of direct observations of construction sites and review of construction documentation. It showed that work stoppages on the examined construction sites were frequent. They were caused by violations of work discipline by the production employees, adverse weather conditions, and defects in the project documentation. The study demonstrated that in almost every case, these bad an adverse effect on the completion date and budget of the investment. The analyses show that in such important and expensive investments as water supply and sewerage systems, organizational structures in which a special role is assigned to middle-rank personnel should be adopted.

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Authors and Affiliations

I. Rybka
E. Bondar-Nowakowska
M. Połoński
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Abstract

The present paper concerns a problem of decisive criteria and their order in formwork selection problem. As the factors affecting the choice of exact form work system have been often discussed in literature, their importance has not been distinctly formulated yet, what hampers aiding formwork selection with MCDA methods that require criteria weights (eg.: SAW, TOPS IS etc.). Therefore, author ran a survey - the decisive criteria were recognized and verified within polls send to various contractors. An analysis of survey results including criteria ordering is a subject of the present elaboration.

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Authors and Affiliations

A. Krawczyńska Piechna

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ETHICS POLICY

”Archives of Civil Engineering” respects and promotes the principles of publishing ethics. Being guided by COPE’s Guidelines ( https://publicationethics.org/resources/guidelines) we ensure that all participants of the publishing process comply with these rules, the journal pays special attention to:

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Peer-review Procedure

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-The model of peer-review is double-blind: the reviewers do not know the names of the authors, and the authors do not know who reviewed their manuscript (but if the research is published reviewers can eventually know the names of the authors). A complete list of reviewers is published in a traditional version of the journal: in-print.
-It is the editor who appoints two reviewers; however, if there are discrepancies in the assessment the third reviewer can be appointed.
-After having accepted to review the manuscript (one-week deadline), the reviewers have approximately 6 weeks to finish the process.
-The paper is published in ACE provided that the reviews are positive. All manuscripts receive grades from 1-5, 5 being positive, 1 negative, the authors receive reviews to read and consider the comments.
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-Manuscripts requiring minor revision (accept after changes suggested by the reviewer) does not require a second review. All manuscripts receiving a "Rate manuscript once again after major changes and another review " evaluation must be subjected to a second review. Rejected manuscripts are given no further consideration. There are cases when the article can be withdrawn, often upon the request of an author, technical reason (e.g. names of authors are placed in the text, lack of references, or inappropriate structure of the text), or plagiarism.
-The revised version of the manuscript should be uploaded to the Editorial System within six weeks. If the author(s) failed to make satisfactory changes, the manuscript is rejected.
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- As soon as the publication appears in print and in electronic forms on the Internet there is no possibility to change the content of the article.

Editor’s responsibilities
-The editor decides whether the paper fulfills all requirements i.e. formal and scientific and which articles submitted to the journal should be published.
-In making these decisions, the editor may be guided by the policies of the journal’s editorial board as well as by legal requirements regarding libel, copyright infringement, and plagiarism.
-The editor maintains the integrity of the academic record, precludes business needs from compromising intellectual and ethical standards, and is always willing to publish corrections, clarifications, retractions, and apologies when needed.
-The editor evaluates manuscripts for intellectual content without regard to race, gender, sexual orientation, religious belief, ethnic origin, citizenship, or political philosophy of the author(s).
-The editor does not disclose any information about a manuscript under consideration to anyone other than the author(s), reviewers and potential reviewers, and in some instances the editorial board members, as appropriate.

Reviewers' responsibilities
Any manuscripts received for review are treated as confidential documents. They must not be shown to or discussed with others except if authorized by the editor. Privileged information or ideas obtained through peer review is kept confidential and not used for personal advantage Any invited reviewer who feels unqualified to review the manuscript or knows that its timely review will be impossible should immediately notify the editor so that alternative reviewers can be contacted. Reviewers should identify relevant published work that has not been cited by the authors. Any statement that an observation, derivation, or argument had been previously reported should be accompanied by the relevant citation. A reviewer should also call to the editor's attention any substantial similarity or overlap between the manuscript under consideration and any other published data of which they have personal knowledge. Reviewers should not consider evaluating manuscripts in which they have conflicts of interest resulting from competitive, collaborative, or other relationships or connections with any of the authors, companies, or institutions connected to the submission. Reviews should be conducted objectively. Personal criticism of the author is unacceptable. Referees should express their views clearly with appropriate supporting arguments. All reviews must be carried out on a special form available in the Editorial System.

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