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1
Content available Problem modelowania połączeń pomiędzy obiektami zabytkowymi a elementami nowo projektowanymi
Zielińska M., Grębowski K.
Przegląd Budowlany
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2016
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R. 87, nr 2
34--37
PL
W artykule przedstawiono badania i symulacje numeryczne dotyczące modelowania połączeń pomiędzy obiektami zabytkowymi a elementami nowo projektowanymi. Zakres prac obejmuje projekt koncepcyjny zewnętrznej klatki schodowej wraz z tarasem obserwacyjnym połączonej z zabytkową wieżą ciśnień, która znajduje się na terenie Politechniki Gdańskiej, badania doświadczalne oraz symulacje numeryczne różnego rodzaju podparcia elementów klatki schodowej na zabytkową wieżę. Wyniki badań i symulacji pozwolą na zobrazowanie wpływu pracy nowo projektowanych konstrukcji współpracujących z obiektami dziedzictwa kulturowego.
EN
The article presents research and numerical simulations regarding modeling of connections between the historical facilities and newly designed elements. The scope of works covers a creative design of an external staircase, including an observation deck, connected with a historical water tower located within the area of the Gdańsk University of Technology as well as experimental research and numerical simulations related to a variety of types of supporting staircase elements, used within the historical tower. The results of research and simulations will make it possible to depict the impact of work of newly designed structures, blended together with the cultural heritage facilities.
2
Content available The effect of Pendolino high-speed rail on the structure of buildings located in the proximity of railway tracks
Grębowski K., Ulman Z.
International Journal of Applied Mechanics and Engineering
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2016
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Vol. 21, no. 1
231--238
EN
The following research focuses on the dynamic analysis of impact of the high-speed train induced vibrations on the structures located near railway tracks. The office complex chosen as the subject of calculations is located in the northern part of Poland, in Gdańsk, in the proximity of Pendolino, the high speed train route. The high speed trains are the response for the growing needs for a more efficient railway system. However, with a higher speed of the train, the railway induced vibrations might cause more harmful resonance in the structures of the nearby buildings. The damage severity depends on many factors such as the duration of said resonance and the presence of additional loads. The studies and analyses helped to determinate the method of evaluating the impact of railway induced vibrations on any building structure. The dynamic analysis presented in the research is an example of a method which allows an effective calculation of the impact of vibrations via SOFISTIK program.
3
Content available Modelowanie oddziaływań dynamicznych pociągu typu Pendolino na konstrukcje zabytkowe mostów kolejowych w Polsce
Grębowski K., Zielińska M.
Przegląd Budowlany
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2015
|
R. 86, nr 1
27--32
PL
W artykule przedstawiono badania i symulacje numeryczne dotyczące modelowania oddziaływań dynamicznych przejeżdżających pociągów Pendolino po zabytkowych mostach kolejowych w Polsce. Zakres prac obejmuje badania doświadczalne, rozwiązanie problemu dotyczącego poprawnego rozwiązania funkcji dynamicznej uwzględniającej model zależności między mostem, torem i taborem, tzw. model RBT oraz symulacje numeryczne dla obiektu zabytkowego mostu kolejowego w Tczewie.
EN
The article presents research and numerical simulations within the scope of modeling the dynamic effect Pendolino passes may have on the historical railway bridges located in Poland. Scope of work includes experimental research and the solution of the problem related to the dynamic function which is a correlation between the train, the railway and the bridge. This model is also known as the RBT model. Additionally numerical simulations for historical Tczew railway bridge have been carried out.
4
Content available Dynamic analysis of historic railway bridges in Poland in the context of adjusting them to Pendolino trains
Grębowski K., Zielińska M.
International Journal of Applied Mechanics and Engineering
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2015
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Vol. 20, no. 2
283--297
EN
The article presents the dynamic analysis of the historic railway bridge in Tczew as an example of the usefulness of such type of bridge for high-speed trains. The model of the bridge and the simulation of rolling stock passage was performed in SOFISTIK program. The scope of work includes experimental studies, the solution of the problem concerning the correct solution features of the dynamic model which takes into account the dependencies between the bridge, track and rolling – stock (RBT). The verification of the model was performed by comparing the results obtained on site during the passage of ET-22 locomotive and twenty (20) open goods wagons with the results obtained in the program for the identical type of rolling stock used to the simulation Pendolino train. Then, after the verification, the simulation of high-speed train passage was performed. The speed of the train passage varied from 150 [km/h] to the max. possible speed of 250 [km/h] which PENDOLINO train, approved for the simulation, may reach. Under the analysis of obtained results it was possible to define the conditions for adjusting the historic bridge to high-speed train passage.
5
Content available Computer-aided construction at designing reinforced concrete columns as per EC
Zielińska M., Grębowski K.
International Journal of Applied Mechanics and Engineering
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2015
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Vol. 20, no. 1
183--200
EN
The article presents the authors’ computer program for designing and dimensioning columns in reinforced concrete structures taking into account phenomena affecting their behaviour and information referring to design as per EC. The computer program was developed with the use of C++ programming language. The program guides the user through particular dimensioning stages: from introducing basic data such as dimensions, concrete class, reinforcing steel class and forces affecting the column, through calculating the creep coefficient taking into account the impact of imperfection depending on the support scheme and also the number of mating members At load shit, buckling length, to generating the interaction curve graph. The final result of calculations provides two dependence points calculated as per methods of nominal stiffness and nominal curvature. The location of those points relative to the limit curve determines whether the column load capacity is assured or has been exceeded. The content of the study describes in detail the operation of the computer program and the methodology and phenomena which are indispensable at designing axially and eccentrically the compressed members of reinforced concrete structures as per the European standards.
6
Content available Cable-stayed cantilever structures as an expat of unique application in the construction of a building located in seismic area – an author’s project of multifunctional building in Lisbon, Portugal
Grębowski K., Werdon M.
International Journal of Applied Mechanics and Engineering
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2015
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Vol. 20, no. 4
805--816
EN
The article presents numerical simulations for the modelling of seismic impact on the structure of unique cantilever cablestayed structure with the application of two methods. The Response Spectrum method, in which a spectrum of the structure’s responses to an earthquake’s impact is generated, and the Accelerogram method, in which we generate dynamic load in the form of a diagram of the connection between acceleration and time for the actual readings during a real earthquake. Both methods have been presented for the El Centro earthquake spectrum. This unique application of a cantilever cablestayed structure in public buildings will allow to assess the safety of this kind of load-bearing system in areas of increased risk of seismic activity. Cantilever cablestayed structures have so far never been designed or analyzed on seismically active areas. Based on numerical simulation we determined the effect of stiffness of load-bearing lines on the increase of stresses and displacements at cable stays joint with the end of the cantilever part of a building.
7
Content available Stan awaryjny trybuny stadionu w Zielonej Górze wywołany synchronicznym tańcem kibiców
Wilde K., Rucka M., Grębowski K.
Przegląd Budowlany
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2014
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R. 85, nr 1
28--32
PL
W artykule przedstawiono badania i naprawy trybuny stadionu żużlowego w Zielonej Górze narażonej na nadmierne drgania podczas synchronicznego tańca kibiców. W trakcie prac wykonano dwa etapy wzmocnień: za pomocą dodatkowych słupków (zalecenie zespołu z Uniwersytetu Zielonogórskiego) oraz wzmocnienie dodatkowymi stężeniami całej konstrukcji zadaszenia trybuny. Przedstawiono wyniki badań pomiarowych in situ dla dwóch etapów wzmacniania konstrukcji oraz symulacje numeryczne sprawdzające efektywności przestrzennego wzmocnienia zadaszenia trybuny.
EN
In the paper the dynamic analysis of tribune of speedway arena in Zielona Góra is presented. The aim of the research is to understand the reason of excessive structure vibrations as well as provide the method for vibration reduction. The in situ measurements, experimental modal analysis as well as numerical simulation for conducted structural strengthening are presented.
8
Modelowanie niektórych dynamicznych oddziaływań widzów na konstrukcje trybun obiektów sportowych
Wilde K., Grębowski K., Rucka M.
Inżynieria i Budownictwo
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2013
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R. 69, nr 11
612--615
PL
Przedstawiono badania i symulacje numeryczne dotyczące modelowania oddziaływań dynamicznych od pojedynczego widza i grupy widzów tańczących specyficzny taniec „Labado”. Zakres prac obejmuje badania doświadczalne oraz rozwiązanie problemu odwrotnego identyfikacji dynamicznej funkcji obciążenia. Poprawność funkcji obciążenia zweryfikowano na przykładzie danych pomiarowych i numerycznych stadionu żużlowego w Zielonej Górze.
EN
In this paper experimental and numerical studies on dynamic interaction between a sports arena stand and dancing spectators are presented. The dynamic loading function for dance called “Labado” for one spectators and group of people is proposed based on experiments. The verification of the loading function is conducted on the example of the speedway sports arena in Zielona Góra.
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