The influence of loading levels on strength of RC columns strengthened by RC jacketing
Zinoviy Blikharskyy
Abstract: In this article strength of reinforced concrete columns, strengthened by reinforced concrete jacketing was investigated. Performance of reinforced concrete columns, strengthened after initial loading were studied. Different loading levels before strengthening were considered.
Keywords: RC structures, strengthening, columns
The feasibility of passive agrotourism building in the region of Jura Krakowsko-Częstochowska
Aleksandra Blukacz, Adam Ujma
Abstract: The paper presents the feasibility of passive agrotourism building in the region of Jura Krakowsko-Częstochowska. The climatic conditions of the region, which was adopted as the location of the analyzed building were characterized. Construction and material solutions and installation applied in the proposed facility were discussed. The results of the calculations obtained in the Auditor OZC were presented and compared with the requirements for passive buildings.
Keywords: passive building, Jura Krakowsko-Częstochowska, agrotourism
Carrying capacity of united structures on the example of CFST elements
Tadeusz Czarniawski
Abstract: In industrial building structures steel pipes filled up with concrete have a growing popularity. In comparing to conventional steel or reinforced concrete poles, united structures steel-concrete of type CFST (Concrete Filled Steel Tube) are characterized by both a greater compressive strength and a greater stiffness. Axial-symmetrical united structures steel-concrete can be applied in many branches of industry. These structures are often applied in bridge buildings, both as sustaining poles as well as, more and more often, as curves of routes, providing the transfer operation both of static loads as well as dynamic at economic scopes of the construction.
Keywords: stiffness, concrete, tubular, steel, axial, compression
Measurements of derivations of facade wells of the building from vertical plane
Jan Ćwierz, Wojciech Cinal, Arkadiusz Kampczyk
Abstract: The article presents the measurement deviation of elevation walls of the building from the vertical plane using two methods of surveying: “spatial resection forward (spatial intersection by angles technique)” and “3D polar survey” using the Leica TC407 Power. Contents: assumptions of organizational - technical accompanying these measurements, the final results along with graphical interpretation covering GRID model and maps isolines wall. The authors present the advantages and disadvantages of each method considered in the optimization of the measurement method. The paper presents the findings, observations and proposals, which should have taken into account and improve. This work was done within the statutory research AGH No. 11.11.150.005.
Keywords: 3D polar survey, spatial resection forward, spatial intersection by angles technique, reflectorless measurement
Speed as a factor of influence on road safety
В.Н. Добромиров, С.С. Евтюков
Abstract: A system of factors that determine the speed limit safe movement of ATS, presents approaches to the justification of the speed limit, assessed whether to amend these restrictions in terms of the current state of road transport system in Russia.
Keywords: car speed, speed limits, road traffic accidents (RTA), road safety (BJJ)
Modelling braced barrel vaults by means Formex algebra
Maksym Grzywiński
Abstract: Space structure are widely applied in design process lightweight structures. Designer’s interest of focused in particular on the structures that represents barrel and spherical form. New design methods are still developed. One of these method is presented here. Numerical models of braced barrel vaults can be generated by means of use Formex algebra - the special designed for this purposes programming language.
Keywords: barrel vaults, Formex algebra
Modelling of the process of flowing media moving on vibroimpact screen sieve
С.А. Евтюков, В.С. Сизиков, Я. Райчык
Abstract: The mathematical modelling of the interaction process of vibroimpact screen working elements and being transported on its sieve layer of bulk material has been performed. The specific example of the calculation of basic parameters of screen elements interaction dynamics and sieve oscillating in vibroimpact regime is submitted.
Keywords: interaction dynamics, bulk material, vibroimpact screen, screen elements, striker, sieve
Calculation of vehicle speed in body discard the pedestrian at arrival
С.А. Евтюков, А.В. Чудаков
Abstract: The article first addresses the problem of determining the vehicle speed at the time of collision with a pedestrian. Three stages of a collision mechanism are considered. The methods of determining the speed of the car in front of a traffic accident is presented. There was used biomaneken to determine the nature of the movement of a pedestrian’s body. The proposed method will increase the accuracy of performed ekspertizm.
Keywords: accident, hit a pedestrian, hit a biomaneken, hit a dummy, an accident with an obstacle, hitting an obstacle, expertise, hit a pedestrian accident with a pedestrian, a traffic accident with the object
Coincidence railway track irregularities
Arkadiusz Kampczyk, Krzysztof Malach
Abstract: The article includes the results of inequality coincidence circuits including authors measurements. The purpose of carrying out the analysis of coincidence inequality track is to identify and locate places that should be subjected to the first overhaul, allowing you to make improving the quality of geometric track. The article includes charts deviations from the limit values and the coincidence made using expert computer system. Coincidence irregularities of the track is a component of geometric quality of the railway track. The article contains reference to the Polish trade regulations applicable in civil engineering railway transport. Article presents the authors observations and conclusions. This work was done within the statutory research AGH No. 11.11.150.005.
Keywords: railway track irregularities, coincidence, imperfection inequality railway, geometry
A review of solutions of skylights
Przemysław Kasza
Abstract: This paper presents the materials and technology used in the production of skylights. It shows a typical construction of skylights arch and dome, as well as flat skylights adapting a module to roof panels.
Keywords: types of skylights, material for skylights, technologies of making skylights
Gela Kipiani, Revaz Kakhidze, Mikheil Todua, Giorgi Rekhviashvili, Nino Chorkhauli
Abstract: Is stated practical method for analysis of orthogonal plates with consideration of specific model of design diagram, boundary conditions and loading. For illustration of offered method are considered specific examples: applied in the center pinning on all four sides plate, when is constant, all four sides of plate are rigidly attached and on them is applied uniformly distributed constant loading.
Keywords: plate, hinge, simultaneous equations; design diagram; boundary conditions
Optimization of cross-sectional shape rod cylinder
Д.Ю. Кобзов, С.П. Ереско, Я. Райчык, С.А. Зеньков
Abstract: The article suggests formulas modeling and optimization of cross-sectional shapes of the hydraulic cylinder rod. Their use will significantly increase the capacity of the unit is not only machines with double-acting hydraulic cylinders with single-rod, but other technical facilities (rims, flywheels, boards, pads, etc.).
Keywords: cylinder, piston rod, composite rod system, the flywheel, the cross-section, a hydraulic motor
Evaluation of safetce roughness cycling on the example of Częstochowa
Mariusz Kosiń, Alina Pietrzak
Abstract: The article discusses examples of solutions construction of pedestrian - cycling in the city of Czestochowa. Presented for selected surfaces of resistance to slip, as the primary indicator of the safety of cyclists and pedestrians. The study shows that the best indicator of the roughness PTV, that in the range 66.8÷67.8, has a surface a asphalt concrete.
Keywords: roughness surface, bicycle paths, pavements
Wiesława Kosmala-Kot, Marek Koniecko
Abstract: In the article graphical-analytical Blum method for solving single top anchored sheet pile wall bottom support was discussed. Calculation of primary project parameters has been conducted for assumed states of cohesive and non-cohesive soils. Results are presented on graphs and include relation between: maximum bending moment of sheet pile wall, support reaction value, position of 0 state on pressure and resistance graph, sheet pile wall insertion depth versus state of cohesive and non-cohesive soils within analyzed range of variability. Article includes equations allowing to calculate design parameters listed above for given load of cover soil level and excavation depth.
Keywords: sheet pile wall, graphical-analytical Blum method, project parameters of wall
Aluminium alloys as structural material in bridges
Paweł Kossakowski
Abstract: Aluminium and its alloys is now one of the materials, which reaches the new area in construction industry. It's not just a finishing material, but more often the primary construction material. Aluminium alloys are increasingly are used in bridge engineering, where it is used not only for the equipment or decks, but also for main structure. This problems are presented in the article, where aluminium and its alloys are discussed in terms of application in bridge engineering as a primary construction material. Examples of bridge structures whose construction wet made of aluminium alloy, as well as new trends observed in modern objects made of this material are also presented.
Keywords: bridges, aluminium bridges, aluminium, aluminium alloys
On problems of heat and mass transfer in concrete structures
Małgorzata Kowalik, Mariusz Poński
Abstract: A stochastic finite difference approach based on stochastic finite elements is proposed for heat and mass transfer modeling. Porous structure with random material properties is investigated. The theoretical formulation of the problem is described. A system of partial differential equations is obtained and solved for first two probabilistic moments of the random temperature field. Example of stochastic thermal analysis in concrete structure with random material parameters are given.
Keywords: concrete, heat and mass transfer, uncertainty, perturbation method
Use of geothermal piles combined with pile foundations
Ivan Kuzytskyi
Abstarct: The possibility of using geothermal piles as an evaporator for the heat pump system. Analyzed experience of implementation of these technologies in leading countries, based on existing calculation methods, performed an experiment by introducing thermal piles with corrections to the conditions of construction in the cold climate.
Keywords: heat pumps, energy pile, geothermal energy, energy efficiency
Tomasz Kwiatkowski, Marlena Rajczyk
Abstract: The paper presents a historical overview of applicability of adhesives and classification of adhesives and their use in construction. It also presents the principles and technology of making glue joints.
Keywords: epoxy adhesives, epoxies, resin
Modern roof covering with roofing fabric membrane
Tomasz Kwiatkowski, Maksymilian Patrzykowski
Abstarct: The paper presents the advantages of using modern technical fabrics which include roof covering membrane. The characteristic design where the use of are the types of fabric. Presents numerous examples of taknin membrane in Poland and in the world.
Keywords: membrane covers, membrane structures, textile coverings
Numerical analysis of segment of steel-concrete bridge girder loaded by dead load
Piotr Lacki, Jacek Nawrot, Anna Derlatka
Abstract: The paper presents the basic information about the development of a VFT composite bridge girder. A new shape of cutting line of the web sheet in order to obtain “composite dowels” was proposed. For the adopted solution, a numerical model of the bridge girder segment was prepared and it was analyzed with the ADINA System. The model was loaded by dead load. Based on the results, the suitability of the analyzed solution to steel-concrete composite bridges was assessed.
Keywords: steel-concrete composite beams, VFT bridge girder
Evaluation of thermal comfort in education buildings based on PMV and PPD indicators
Anna Lis
Abstract: The article discusses the PMV and PPD indicators of thermal comfort and methods of their determination. The value of the basic factors influencing on the people feelings in the rooms and PMV and PPD indicators was estimated. The measurements of thermal comfort indicators were made using a thermal comfort measurer. The changes in the PMV and PPD value, together with changes in environmental and personal factors were investigated. Analysis of people thermal comfort in the studied group of educational buildings was carried out. The measurements of indicators supplemented and compared with the individual assessment of thermal comfort made by users of the rooms based on the questionnaire surveys.
Keywords: human thermal comfort, PMV and PPD indicators, educational buildings
Vibrations and dynamic impacts on buildings and structures
Maciej Major, Izabela Minda
Abstarct: In the paper there is shown an assessment of the impact of dynamic actions on building constructions as well as on people inside the buildings. Moreover, there are presented a few types of security technology leading to reduce the effects of vibration. The last stage of the paper is connected to numerical analysis carried out in ADINA program and modal analysis carried out in Robot Structural Analysis program. In both programs beam was modeled as concrete beam in two-dimensional space (2D). Dimensions of the beam were as following: 40×20×300 cm.
Keywords: vibrations, FEM, dynaics
The use of 3D printing technologies in the civil engineering
Maciej Major, Izabela Minda
Abstract: In the paper there is presented the use of 3D printing technology in building engineering, which is used both during performing of the architectural design by creating 3D models of planned construction as well as during the stage of erecting buildings.
Keywords: 3D printing, 3D construction technology
Jacek Nawrot
Abstarct: The article presents considerations for selection of shear connectors to the steel-concrete composite floor depending on the type of slabs. Selected types of shear connectors and slabs are discussed and list of the factors which should be followed when choosing of type of composite connection.
Keywords: steel-concrete floor, shear connectors
Analysis and use of acoustic properties of rubber granules obtained from recycling
Judyta Niemiro
Abstract: Storage of industrial waste is a growing global problem. We are dealing with the formation of used car tires in large scale. The long process of natural rubber destruction puts a burden on the environment. The possibility of increase the use of rubber materials obtained from recycled is sought. In the paper is presented the possibility of using rubber granules, using the sound-absorbing properties. Research acoustic insulation of composite samples were submitted. The main components of the composites were rubber granules and a binder of the plastic: polyethylene terephthalate.
Keywords: rubber granules, sound-absorbing properties, acoustic studies
Short- and long-term compressive strength of mortars modified with hardening accelerating admixtures
Jan Pizoń, Beata Łaźniewska-Piekarczyk
Abstract: This paper presents results of compressive strength tests for Portland cement mortars and mortars with addition of ground granulated blast furnace slag (GGBFS). Mortars were modified with usage of four different hardening accelerating admixtures. Compressive stress tests were conducted after 12 hours up to 360 days of curing. Effectiveness of those agents is higher for mortars made of cement with addition of GGBFS up to 28th day. After this term some of those admixtures have profitable influence also. It is shown that not every hardening accelerating admixture cause decline of long-term compressive strength of mortars made of some types of cement. Mortars with addition of GGBFS obtains compressive strength after 7 days of curing close to its final strength. It is similarity to CEM I 52,5R mortars without modification by admixtures (with notice to scale of phenomenon).
Keywords: compressive strength of mortars, Portland cement, ground granulated blast furnace slag, hardening accelerating admixtures
Mariusz Poński
Abstract: In the paper calculation method of horizontal cross-section of concrete chimney at ultimate limit state is presented. The principles of building a suitable nomograms for any grade of steel are shown. Calculation algorithm and a numerical example are given.
Keywords: concrete chimneys, cross-section calculating, algorithm
Nina Sołkiewicz-Kos
Abstract: The article presents formal and functional solutions of the “Politechnik” Club of Czestochowa nUniversity of Technology. Attempt to look at the times of modernism aims to give an understanding of building’s architecture, which still is timeless and current.
Keywords: architecture, modernism, public utility
Transformation directions of downtown areas on the example of the city of Częstochowa
Nina Sołkiewicz-Kos
Abstract: The issue of the development of urban areas includes spatial phenomena concerning downtown areas. To preserve them in good condition requires constant action. This includes the creation of socially acceptable spaces which would stimulate development processes of central areas of cities. Czestochowa is an example of a city looking for right relations between modernity and the future. This requires delicate and precise decisions related to the introduction of center-forming functions within the historic city center. As a result, it has a chance to adapt to modern functional requirements and changing needs of the society. This multidirectional search aims at improving the value of urban environment and is a reflection of the relation between cultural, commercial and service functions. Selected stages of downtown development include both historical period and contemporary one. They are an attempt to illustrate the transformational activities that stimulate the process of the urban environment development at a given time.
Keywords: urban planning, architecture, sustainable development
Assessment of technical reinforced concrete grain silos
Mariusz Urbański
Abstract: In the assessment of the technical condition very rare concrete silos. Presented in the article battery silos with a significant consumption forced to perform non-destructive testing and sizing methods for checking the strength of its individual elements specify how the repair.
Keywords: concrete, technical condition of the objects
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