<abstract xmlns="http://www.w3.org/1999/xhtml">This paper presents a comparative evaluation among some international, European and American, seismic design standards. The study considers the criteria for the analysis of conventional (residential and commercial) buildings. The study is focused on some critical topics: definition of the recurrence periods for establishing the seismic input; definition of the seismic zonation and shape of the design response spectra; consideration of local soil conditions; definition of the seismic force-resisting systems and respective response modification coefficients; definition of the allowable procedures for the seismic analysis. A model for a standard reinforced concrete building (“Model Building”) has been developed to permit the comparison among codes. This building has been modelled with two different computer programs, SAP2000 and SOFiSTiK and subjected to seismic input according to the several seismic codes. The obtained results compared are leading to some important conclusions.</abstract>

Federal University of Rio de Janeiro, Brazil, Rua Rainha Guilhermina 74/801, Rio de Janeiro, Brazil

Technical University of Civil Engineering, Bucharest, Romania

Federal University of Rio de Janeiro, Brazil Ana Arai - Graduated Student, Federal University of Rio de Janeiro, Brazil

Comparative Study of Codes for Seismic Design of Structures

<abstract xmlns="http://www.w3.org/1999/xhtml">In this paper we will use the statistical inference, in particular the Bayes tests for the signification of the parameters of linear regression. We will consider the cases of known variance, and unknown variance respectively. Because we replace the Student tests by the Z tests in practice if the involved number of degrees of freedom is at least 30 , we can replace the case of unknown variance with that of known variance in our paper, if the above number of degrees of freedom is at least 30 . Because in economics we generally know the signs of the involved parameters, in practice the one-sided parametric tests are used. However, in this paper we will refer also to the two-sided Bayes test.</abstract>

Bayes Signification Tests in Linear Regression and Economic Applications

<abstract xmlns="http://www.w3.org/1999/xhtml">One of the key operations in the construction of hydrogeological models is the transformation of continuous physical systems into discrete models while conserving the aimed model performance level and optimizing the available resources. Such operation is called discretization, and it has to be applied to both spatial and temporal domains in hydrogeology. The present paper deals with the temporal domain discretization. A literature review is given first, and then a parametric study (using 1D flow modeling) is conducted to assess the effects induced by boundary conditions (specified head or specified recharge rate), data temporal resolution and model simulation time step on hydrogeological flow model performances. It was found that the effect induced by the dynamic comportment of a recharge rate boundary condition type is more important than that due to a specified head. For the recharge rate, the time step must be smaller or equal to the data resolution when using Modflow. As for a specified head boundary condition type, it was recommended to take a time step satisfying Δt∞1/(K × Δh).</abstract>

Numerical Study on Temporal Domain Discretizing for Hydrogeological Modeling Practices

<abstract xmlns="http://www.w3.org/1999/xhtml">The paper refers to a structural finite element analysis on the reservoirs for sludge
fermentation subjected to static in-duty loads, at Glina Water Waste Treatment Plant. The purpose
was to assess the stress and deformation states in subsequent erection and service conditions, to
verify the design provisions and to emphasize the sensitivities, for a structure which was designed
in the ‘80s based on analytical procedures. The results obtained on the numerical models highlight
the importance of the soil-structure interaction, in peculiar the one influenced by the soil mass
deformability, on the overall structural response. Based on the calculated stresses, all structural
components were verified according to the actual design codes at the ultimate limit state and the
service limit state (water tightness/crack emergence).</abstract>

Structural analisys of concrete pre-stressed reservoirs for sludge fermentation – water waste treatment plant bucharest – glina. numerical fem assessment of the structural response for static in-duty loads

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Modelling in Civil Environmental Engineering

The roots of the Technical University of Civil Engineering of Bucharest (UTCB) go back in 1818 in the school of engineering concerning surveying and geodesy. In 1864 it became the "School of Bridges and Roads, Mines and Architecture", and from 1867 the "School of Bridges, Roads and Mines" and "the National School for Bridges and Roads" in 1888. In 1921, the "National School of Bridges and Roads" became the "Polytechnic School of Bucharest", where the civil engineers' training was carried out in the Civil Engineering Department which, in 1938, came to be known as the Faculty of Civil Engineering.  In 1948, due to the large development of the construction sector in Romania, an important part of the Polytechnic School was separated as the Civil Engineering Institute, including not only the Faculty of Civil Engineering, but also parts of other specializations related to constructions, as building services engineering, mechanical engineering for constructions, hydrotechnical engineering, roads, bridges, and railways construction or geodesy.  Starting from 1994, the Civil Engineering Institute became the Technical University of Civil Engineering Bucharest (UTCB).  The scientific results were published internally in the university scientific bulletin. Since 2005, the scientific bulletin of UTCB became the Mathematical Modelling in Civil Engineering journal.  The journal serves the Civil and Environmental Engineering community and our societies, aiming to effectively contribute to the development, innovation and progress in the field. Our journal publishes papers that present the state-of the-art results from research and practice.  Starting with 2021, the journal Mathematical Modelling in Civil Engineering expands its research fields and thus becomes: Modelling in Civil and Environmental Engineering, with a new ISSN: 2784-1391.  The journal Modelling in Civil and Environmental Engineering covers a wide range of topics from Civil and Environmental Engineering field and is ready to publish high quality standards, state-of the-art, peer-reviewed papers, coming from the academic and research community, and industry as well. MCEE addresses both theoretical developments and practical applications related to Civil and Structural Engineering, Geotechnics and Environmental Science (Soil, Water and Air Pollution, Wastewater Treatment Engineering), Thermal Sciences and Engineering (Thermodynamics, Transport Phenomena, Building Heat &amp; Mass Transfer, HVAC &amp; R), Hydraulic and Wind Engineering, Mechanical and Electrical Engineering in the Built Environment, Automation in Constructions, Roads, Bridges and Railways Constructions, Surveying and Geodesy and any other topics related to constructions and the built environment.  To be acceptable for publication in the MCEE journal, a manuscript must address valuable and of significant interest scientific issues for the Civil Engineering community, free of evident commercial or private interest.  The authors are requested to make sure that appropriate research ethical standards are strictly followed in their work, when submitted to MCEE.　  The MCEE staff fully supports the authors during the entire evaluation process and is committed to ensure that the ethical standards, related to submittal, review, and publication of manuscripts, will be strictly followed.  Rejection rate   22%   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 