Theses (Department of Civil Engineering)

Állandó link (URI) ehhez a gyűjteményhez

https://hdl.handle.net/2437/360720

Theses collection of the Department of Civil Engineering. The collection was started in 2023.

At the University of Debrecen, in accordance with the 2022 amendment to the 2011 Higher Education Act, student theses are only accessible from devices connected to the University's Eduroam WiFi network or from a university IP address.

“The thesis or diploma work of a student who has successfully passed the final examination shall be stored in full in the academic system of the higher education institution, and a record shall be maintained thereof. The stored theses and diploma works – with the exception of parts classified as confidential in accordance with the relevant legislation – must be made accessible and searchable without restriction through the academic system.” Further info on the National Higher Education Act in Hungarian: Felsőokt. tv. (új) - 2011. évi CCIV. törvény a nemzeti felsőoktatásról - Hatályos Jogszabályok Gyűjteménye.

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Megjelenítve 1 - 20 (Összesen 40)

Korlátozottan hozzáférhető
Enhancing sustainability through BIM-FEM integration in structural optimization
Opejo, Erasmus; Igaz, Titusz; DE--Műszaki Kar
The integration of Building Information Modeling (BIM) and Finite Element Method (FEM) has emerged as a promising approach to streamline structural design workflows, yet practical implementation remains constrained by persistent technical challenges. This study aims to enhance sustainability in structural optimization through the integration of BIM and FEM, with a focus on identifying and addressing the critical barriers that undermine the efficiency of current integrated models. The analysis is based on a series of structural design case studies conducted using interoperable BIM-FEM workflows from 2010. The type of file tested was IFC (Industry Foundation Classes) exported from ArchiCAD 29 to FEM-Design 25. The integrated workflow was tested using a multistory hotel building model comprising of only beams, columns, and slab elements to isolate and evaluate the core structural interoperability challenges and outcomes According to this study, three principal failure points were identified that render the integrated model impractical for shortening design time which include geometrical and eccentricity errors particularly in connections between beams and columns, unexpected local refinement and very small angle errors and meshing failure were observed to occur inconsistently through the integrated model, compromising the accuracy of structural analysis and necessitating repeated corrections. The study concludes that current BIM-FEM integration, while technically feasible, remains impractical for reducing design time due to unresolved interoperability failures in meshing, geometry translation, and eccentricity handling. The study recommends the development of standardized data exchange protocols, enhanced geometric tolerance handling in FEM solvers, and automated detection of eccentricity mismatches to realize the sustainability and efficiency gains that integrated structural optimization promise
Korlátozottan hozzáférhető
In Situ Upgrading Versus Relocation: A Comparative Analysis of Climate Preparedness Strategies for Flood Risk in Informal Settlements In Nairobi and Paris
Njenga, Miriam; Gyorgy, Csomos; DE--Műszaki Kar
Informal settlements are among the most flood-vulnerable places on the earth, and yet the interventions built to protect them keep falling short. This study tried to look at why this happens through a comparison of two very different settlements: Kibera in Nairobi, Kenya, and Clichy-sous-Bois in Paris, France. The first one, Kibera in Nairobi, Kenya, is one that has been self-built by its residents within Sub-Saharan Africa with no state intervention. The second is one is Clichy-sous-Bois in Paris, France that is completely state built as social housing for the city’s underprivileged. The two offered the opportunity to compare upgrading strategies, in situ vs relocation in response to climate change related flooding risks. The study followed desktop reviews of secondary data, interviews with professionals as well as structured questionnaires with the residents, community leaders and NGO staff from the two settlements. A comparative study was done using the following three objectives: (1) whether the existing infrastructure was adequate enough for managing flooding ris,ks, (2) how the spatial organization of each settlement affected its vulner,ability to flooding, and (3) what were the real impacts of in situ upgrading vs relocation. What emerged is not a clear winner between the two strategies. In both cases, the most vulnerable of, these communities still suffered, whether through de facto displacement i,n Kibera or the severing of social networks in Clichy-sous-Bois. Infrastructure alone, as was seen, was not enough. What determines whether an intervention actually works is less about what gets built and more about how it is done. Whether communities are genuinely involved, whether they feel secure in their homes and whether the planners actually listened to the knowledge that they already held about their own neighborhoods. The study argues that closing the gap between well-intentioned climate preparedness strategies and their lived outcomes will require treating communities not as the recipients of the solutions but as the starting points for them.
Korlátozottan hozzáférhető
Urban Recovery and Social Infrastructure in Homs, Syria: an integrated approach to reintegrating spatial and social structures
Housein, Raghad; Lovra, Eva; DE--Műszaki Kar
For centuries, the city of Homs evolved into a vibrant urban center, but the armed conflict starting in 2011 caused devastating physical and social destruction. Current reconstruction efforts struggle to balance modern top-down planning with the preservation of heritage and social identity. To address this, this thesis examines international post-disaster recovery models to propose a morphological framework for reconstructing the historic urban fabric. Using the Bab Houd neighborhood as a case study. The project preserves traditional visual identity while introducing modern infrastructure and diverse housing styles to support returning families. Ultimately, this approach utilizes architecture and urban planning as vital tools for social reintegration and sustainable recovery in post-conflict historic cities.
Korlátozottan hozzáférhető
Steel structure design for a warehouse (with wind-tunnel check)
Kobia, Cosmas Mutembei; Laszlo, Radnay; DE--Műszaki Kar
Steel is widely used in industrial construction due to its strength, durability, and ability to span large distances with relatively light sections. This thesis presents the structural design of a steel warehouse, and a focus on wind load analysis using the wind tunnel module in AxisVM. Two approaches to wind loading are compared in this study: the standard Eurocode method and the wind tunnel module within AxisVM, which generates site and geometry-specific wind pressure and suction distributions. Unlike manual code-based loads, this method captures localized and aerodynamic effects that influence the structural response. A global model of the warehouse was developed using AxisVM finite element software, and internal forces obtained from the analysis were compared with those from manual calculations carried out in accordance with Eurocode provisions. Hand calculations were also performed to verify the software outputs and to ensure that the selected steel sections and connections met the design requirements. The project concludes with technical drawings showing the structural layout, member sizes, and connection details
Korlátozottan hozzáférhető
OPTIMIZED DESIGN OF BRACING SYSTEMS IN STEEL FRAME STRUCTURES FOR IMPROVED STABILITY AND MATERIAL EFFICIENCY
Omuga, Derrick Omondi; RADNAY, LÁSZLÓ; DE--Műszaki Kar
Steel is one of the major if not the major materials used in the construction industry today. The steel structures are designed for different life spans according to the stipulated design criteria. It is therefore necessary for these structures to bear with utmost certainty the loads that are applied to them. Efficient design of bracing systems plays a particularly vital role in ensuring such certainties when these loads are applied particularly lateral loads. The aim of this thesis work is to identify the best bracing model that will be incorporated into a frame structure to ensure they work together to withstand the loads applied. In the preliminary stages, I will investigate the existing bracing systems models. A loading force from an arbitrary frame would be calculated. The models would then be subjected to a single directional loading force from the frame. The behavior of these models towards the effect of the force would be studied and compared. The volume of material used in each model would be calculated as well. A geometrically defined and elaborate steel frame structure would then be designed. different loads will be applied; the structural and design parameters would be defined to the whole frame. The chosen bracing system would be added to the frame and edited appropriately. Numerical simulation and analysis would be done using AxisVM software. Finally, the results from the software would be deduced and studied to reach an elaborate conclusion.
Korlátozottan hozzáférhető
Design and Analysis of Multi-Storey Steel Parking Structure
Wilson, Charlemagne; Laszlo, Radnay; DE--Műszaki Kar
he study carried out involved the design and analysis of a multi-level steel parking facility with consideration given to structural behaviour and space optimization. The proposed structure utilized a steel framing system with a vertical circulation module configuration. The structure was analysed under the relevant loading conditions including dead loads, live loads, snow loads, wind loads, seismic loads, fire loads and imperfections. The structural members and connection configurations selected for the structure were evaluated through global analysis and connection design procedures. The results obtained from the analysis showed that the utilization values remained below a value of 1 for all evaluated cases. Based on the observations obtained, the selected structural system was considered suitable for the intended parking facility application.
Korlátozottan hozzáférhető
Design of an Art Gallery in Botanical Garden
Shokhanova, Dayana; Lugosi, Peter; DE--Műszaki Kar
This thesis presented the overall project concept, with focus on the detailed structural design and analysis of the roof structure. Mainly it included calculation of load, modelling of the structure in AxisVM software, timber elements check and design of connections. A linear analysis was first conducted to generate load combinations and obtain utilization results, which are below allowable limit. A nonlinear analysis was carried out to determine internal forces and moments under different combinations of permanent and variable actions. Then the results of the analysis were used for each critical timber element verification. Special attention was given to the design and calculation of different types of connection depending on position and condition, such as lapping, nailed and steel plate bolted connections. The obtained results showed that the designed structure provides strength and stability under certain loading conditions.
Korlátozottan hozzáférhető
Structural Design and Fire Load Assessment of Joints for an Educational Facility
Abdelazeem, Mohamed; Radnay Laszlo, Laszlo; DE--Műszaki Kar
The thesis mainly talks about fire load on the structure. I used different software for the calculation, like Idea StatiCa or AxisVM. I had to do the main design before the fire design. The structure is inspired by a structure from the US. The design was subjected to an earthquake and passed. There were multiple checks for imperfections and other loads, such as wind load.
Korlátozottan hozzáférhető
Beyond Car-Dominance: Developing Context-Sensitive Scenarios for a Sustainable and Equitable Mobility in Ramallah/Al-Bireh
Ayyash, Nour; Csomós, György; DE--Műszaki Kar
In recent decades, the term “sustainable mobility” has become increasingly prevalent. Rapid urbanization and the rising demand for private vehicles have made mobility problems worse in densely populated areas of cities, especially in areas marked by fragmented administration, lack of space and lack of efficient transport infrastructure. Ramallah/Al-Bireh Governorate in Palestine is one of the best examples of rampant and uneven urbanization. As a developing urban centre, it is facing challenges of structural and re-spatial transportation, particularly on the "Central Business District" around Al-Manara Square. This vital center with its economic, cultural, political, and transportation importance is visited by many commuters every day. The excessive dependence on car increases the traffic jams, danger to pedestrians, the degradation of environment, the problem of accessibility and the decline in the quality of life in cities. Despite the lack of the opportunities to practice sustainable mobility, this research examines the possibility of improving the mobility and solving the obstacles of sustainable urban mobility by studying the current situation in the Ramallah/Al-Bireh Central Business District. This is done on the basis of a multidimensional framework. Instead of only considering the challenge of tackling the infrastructure, this study takes a holistic view of mobility in which the dimensions of environmental sustainability, economic efficiency, social equity, accessibility, and institutional capacity are integrated. In this context, mobility means safe, practical and environmentally responsible transport options that support walking, cycling, public transport while minimizing the need for private vehicles and the problems associated with them such as emissions, pollution, noise, congestion, etc. The aim of the study is to bridge the gap between quantitative measurement and both decision-making and spatial assessment by combining spatial assessment, quantitative survey data, and qualitative information from institutional stakeholders. This combines the patterns of behavior, public perceptions, policy limits and spatial circumstances. The research identifies the areas of shortcomings of the current public transport, and suggests realistic and contextual solutions. Based on the analysis, sustainable mobility scenarios were formulated and assessed by considering aspects of sustainability such as social, economic, environmental, spatial, mobility and institutional impacts, to support the implementation and decision-making. The study also identifies the potential phases of implementation to ensure successful implementation of the proposed mobility strategies.
Korlátozottan hozzáférhető
Design of a tennis hall with timber frame structure
Chernyshova, Anastasiia; Bereczki, Zoltán; DE--Műszaki Kar
The aim of this thesis is to present the design of a tennis hall with a timber frame structure. The main objective is to make a functional, safe, and stable indoor sports facility. The structure is located in Jászapáti, Hungary, where three tennis courts are already exist. The purpose of the thesis is to improve the existing facility by designing a covered indoor tennis hall, which will allow the courts to be used throughout the year. In addition to the tennis courts, the project includes the design of auxiliary spaces such as changing rooms, showers, lobby, café, medical room, coach’s room, equipment room, and technical rooms. The main structural system of the hall consists of glued-laminated timber frames with V-shaped struts, which makes the tennis play area open and free from internal columns. Building has the length of 60,25 m, width of 41,95 m, and height of 12,65 m. During the design of the structure loads such as dead-load, snow, wind and imposed were determined and applied to the structure using the engineering software AXIS VM. After that the structure was checked for stability. Calculations were made for main load-bearing elements such as columns, frames and inclined struts. These elements were checked for compression, bending, shear, combined loading, and stability. The results of the calculations showed that the selected timber sections satisfy the required strength and stability criteria. The thesis demonstrates that timber frame structures can provide an efficient and environmentally friendly solution for large-span sports buildings, combining structural reliability, architectural functionality, and sustainable construction principles.
Korlátozottan hozzáférhető
Implementation Effect, Obstacles and Optimized Paths of Urban Ecological Planning in Nanchang: Based on Watershed Ecology and Wetland Protection
Wang, Rui; Pataki, bea; DE--Műszaki Kar
Nanchang, Jiangxi’s capital and China’s first provincial-level International Wetland City, sits in the Yangtze River’s middle reaches and encompasses the Ganjiang and Fu rivers and Poyang Lake. From 2019 to 2024, it advanced ecological planning—including Sponge City construction and Ganjiang riverbank ecological corridors—yielding measurable gains in wetland protection and water quality. Yet challenges persist: poor watershed coordination, conservation-development imbalance, lack of outcome metrics, and insufficient public engagement and investment. This study evaluates Nanchang’s ecological performance during this period using a multi-criteria index (AHP and entropy weighting) and ArcGIS analysis to identify bottlenecks. It also draws lessons from comparable inland lake cities abroad to inform practical, scalable strategies. Ultimately, it aims to strengthen urban ecology practice in lake-dependent cities and support Nanchang’s evidence-based, adaptive ecological planning.
Korlátozottan hozzáférhető
Climate-resilient Redesign of a Residential Project in Debrecen through Functional Diversification: A Performance-based Study on Water-Carbon Balance and UHI Mitigation
Li , Huanxi; Pataki, Beáta; DE--Műszaki Kar
The paper discusses the Tócóvölgy residential development project in Debrecen, Hungary, to consider the challenges of adaptation in suburban residential areas due to climate change, particularly heatwave, extreme precipitation within a brief period, water resources management, and low-carbon mode of operation. The original design was mostly residential and large-scale landscape water bodies, but it did not have enough functional integration, significant maintenance loads on open water systems, and vague relationship between the roof system and water-heat-carbon goals. In the context of the same site limits and similar residential size, the research compares the original design with the new design. The methods used to evaluate the designs are area statistics, runoff coefficient method, comparison of stormwater retention capacity under a typical storm scenario, reference evapotranspiration estimation, solar radiation analysis and incremental carbon budget method. The findings show that the proposed design increases the non-residential functional area by approximately 46.16%, decreases the area of hard surfaces/roads by roughly 33%, and increases blue-green space by about 6.1%, while the blue-green space is increased by about 6.1 percent. In the chosen 10-minutes, 107.46 mm/h storm condition, green roofs and landscaped balconies decrease runoff by about 458.91 m³ in comparison with hardened control condition. After considering the storage capacity of the lake and grass-lined swales, the residual flood volume is 0 m³ within the defined storm scenario. The graywater irrigation coverage rate of rooftop green spaces is about 414.8 percent. The average solar radiation in summer declined by about 33.21-37.20 percent and the average solar radiation in the heating season reduced by about 27.66 percent which stands for a trade-off between summer cooling and winter solar gain. Within the defined incremental carbon boundary and 50-year study period, the new design shows incremental carbon-neutrality potential, with a cumulative net carbon effect of -745.6 tCO₂e. However, the carbon-neutrality margin is narrow, and the result depends strongly on long-term PV performance, cooling-energy savings, and the control of additional winter heating demand. Overall, the new plan has the potential of incremental carbon neutrality within the stated limits and may boost the climate resilience of the residential area with the help of functional integration, decentralized stormwater management, non-potable water recycling, rooftop energy systems, and multi-tiered greening.
Korlátozottan hozzáférhető
Analysing the Urban Morphological Resilience of Heritage Areas: A Space Syntax Study of Kandy, Sri Lanka
Jayawardana Ralalage, Miyunadi Devindi Jayawardana; Lovra, Éva; DE--Műszaki Kar
The purpose of this research is to analyse this urban morphological resilience, focusing the Heritage Urban Area of Kandy. By using Space Syntax analysis as the primary methodology, the Heritage Urban area is assessed through Global Integration (Rn), Local Integration (R400) and Connectivity measures using QGIS toolkit and DepthmapX. As the supporting study, a Morphological Spatial Mapping exercise is used which classifies urban elements in the study area as either Static Urban Elements or a Dynamic Urban Elements. Synthesis of these two methods produce evaluation framework with four zones; Resilient Zone, Vulnerability Zone, Stress Zone and Adaptability Zone. Inferences of this research confirms that, Kandy consists of a singular linear spatial corridor that amplifies the unmanageable congestion in Kandy’s geographical bottleneck. Furthermore, Kandy’s downtown gird city and colonial commercial area have the highest integration values and contributes the most to the resilience of the city. However, the critical finding becomes the Temple of Tooth Relic and the Kandy Lake surrounding which are the cultural cornerstones falling under Vulnerability zone. These two spatial elements with low integration limit the accessibility for pedestrians and becomes extremely fragile for the contemporary urban developments. The other key finding is that Bogambara Prison Complex becomes an improper resilience zone, where it occupies a structurally critical location while remain functionally inactive. This research concludes with an evaluation framework based on four zones system, that provides a replicable spatial logic tool to assess future development proposals in Kandy and similar heritage sites.
Korlátozottan hozzáférhető
Urban circularity in South American cities: A multidimensional index to assess regional performance
Coaquira Suarez, Martha Pilar; Czédli, Herta Mária; DE--Műszaki Kar
The circular economy has emerged as an alternate strategy to the current linear economy, aimed at mitigating the depletion of resources caused by current patterns of production and consumption. Therefore, in recent years, the South American region has begun to implement strategies to transition to this model with the aim of building sustainable cities. Hence, this thesis seeks to evaluate and compare progress in the transition to a circular economy among the cities of Buenos Aires, Santiago, Bogotá and Lima, the most committed cities in the region. This evaluation is based on measuring progress using a framework of indicators across five relevant dimensions: governance, waste, food, sustainable production and responsible consumption. According to these indicators, Bogotá emerged as the city with the best overall performance in its transition to a circular city, closely followed by Santiago, which performed particularly well in the Responsible Consumption sector. Buenos Aires demonstrated strong performance in strengthening its governance in line with the circular model, whilst Lima was the city with the lowest performance. This study sought to highlight best practices by sector and city in order to serve as examples across the region, thereby promoting a faster and more sustainable transition in cities.
Korlátozottan hozzáférhető
Industrial-Driven Urban Growth and Sprawl Prevention: Comparative Lessons from Developed Cities for Sustainable Urban Planning
Rosalem, Glyra; Csomós, György; García Cascales, María Socorro; DE--Műszaki Kar
This thesis examines the relationship between industrial expansion and urban sprawl in Debrecen, Hungary, a rapidly developing mid-sized European city. Using land-use data from the Copernicus Urban Atlas (2012–2021) and QGIS-based spatial analysis, the study identifies patterns of industrial land-use conversion within Debrecen’s Functional Urban Area. The findings reveal that despite a declining population, industrial land development and car dependency continue to increase, indicating emerging signs of urban sprawl. To better understand sustainable approaches to industrial urban growth, the study compares Debrecen with Freiburg, Germany, and Vitoria-Gasteiz, Spain, two cities recognized for balancing industrial development with sustainable urban planning policies. Through a comparative exploratory mixed-method research design, the research develops five guiding principles that form the basis of a proposed 10-year Strategic Framework for Debrecen. The framework aims to address industrial-driven sprawl while promoting sustainable urban planning.
Korlátozottan hozzáférhető
Design of a Four-Storey, 16-Unit Residential Building in Kakamega, Kenya
Omulama, Harriet Maobe; Bereczki , Zoltan; DE--Műszaki Kar
This thesis is a design of a multistorey residential rental building in Kenya. The thesis focuses on the architectural design of a four storey building. It is backed with structural analysis of the reinforced load bearing system. The output includes the floorplans and the calculation results.
Korlátozottan hozzáférhető
Renewal of Nizwa’s Old Neighbourhoods
Al Rashdi, Shurooq; György, Csomós; DE--Műszaki Kar
The study creates an integrated plan to revitalise degraded urban and heritage areas in Wilayat Nizwa, Oman, based on analysing urban deterioration, environmental risks, and heritage opportunities. Using participatory design, it suggests reusing wadi paths, adapting traditional buildings, boosting the economy, and rehabilitating public spaces. The study finds that heritage revitalisation needs a balanced approach combining urban planning, conservation, and social-economic sustainability, offering a model relevant to Oman and the Gulf.
Korlátozottan hozzáférhető
Analysis and Design of Timber Roof Structures
Ormanbyek, Yelikjan; Lugosi, Peter; DE--Műszaki Kar
My thesis work is about the Design and Analysis of timber roof and I want to thank my supervisor for helping me to finish my work
Korlátozottan hozzáférhető
Evaluation of Eco-solution in Residential Structures: A study of the effect of natural light in a Residential Building and How to enhance it
Nwankwo, Chukwuma; Igaz, Titusz; DE--Műszaki Kar
This thesis is an exploration of a solar structural design. It dives into the various and necessary factors that need to be considered for a stable and efficient solar structural building to be constructed. It not only guides us in ensuring a safe and efficient design but it also enlightens us on the ways daylight plays a crucial role in our lives. As living in harmony with the environment is a necessary consideration, we will also be delving into the environmental factors that affect our architectural design, such as the amount of light penetration needed in the structure, the orientation of the structure to get the most amount of light, various ways to control the light intake, the proper positioning of the windows and the interior design to maximize the natural light.
Korlátozottan hozzáférhető
Structural check of the multi-aile hall building
Varta, Amirreza; Radnay, Laszlo; DE--Műszaki Kar
This thesis analyzes an existing hall building after the addition of a flat-roof extension and two dominant openings, which required new load calculations due to the loss of structural symmetry. The structure was re-evaluated for internal forces, stiffness, joint connections, imperfections, seismic actions, fire design, and buckling behavior. The results confirm that the main structure can safely support the new extension and satisfies the required safety and performance criteria.

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