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专题报告

专题报告

在“专题报告”板块中您能发现许多实用的技术文章和提示技巧,方便您使用 Dlubal 软件。

Appliance of Precast Concrete Elements in Tall Buildings

2015年02月19日

硕士论文

by Eemeli Tikkanen, Finland

University of Oulu, Department of Mechanical Engineering
Advisors: Raimo Hannila Lic.Sc. (Tech.), Atte Leppänen M.Sc. (Tech.), Tuomas Jaakkola M.Sc. (Tech.), Juha Rämö M.Sc. (Tech.)
Programs used: RFEM 5, RF-STAGES, RF-DYNAM, RF-STABILITY

The appliance of precast concrete elements in constructing tall residential buildings has been investigated in this thesis when floors are composed of hollow core slabs. In this thesis, the stability of tall buildings is analyzed when all load bearing and bracing structures are precast concrete elements.

Shear walls are used as the bracing structure. The diaphragm behavior of floors composed of hollow core slabs is investigated. The thesis focuses on forces in vertical and horizontal joints between precast elements.

The appliance of mostly used joint details and connections in Finland are investigated. The connection capacities are calculated by current Finnish design principles. In addition a tall buildings horizontal displacements and dynamic movements caused by wind loading are analyzed.

Prefabricated Hollow-Box Timber Panels for Floors and Roofs

2014年12月19日

硕士论文

by Francisco Coronel, Spain

UPC / Polytechnic University of Catalonia / BarcelonaTech
Programs used: RFEM, RF-TIMBER Pro, RF-LIMITS

This thesis investigates the ability of prefabricated timber hollow-box panels that are used as slabs by comparing those that are currently on the market.

A test is perfomed using the software. In the laboratory, an alternative was made of a timber fastener to unite the elements without adhesive. When bamboo rings are placed in areas of greater stress, the resistance increases 240%.

This fact, combined with the great capacity be used for long spans, its possibility to include acoustic and thermal insulators as well as pipes and cables, easy disassembly and sustainability, makes the wooden panels an alternative that can compete with current construction systems.

"I would like to thank you for your help. Your friendly responses were helpful, timely and efficient."

Influence of Core Density in Stiffness of Sandwich Surface

2014年07月31日

硕士论文

by Vitor Dacol, Brazil

Institute of Graduate Studies - IPOG
Programs used: RFEM

In this Master thesis, the student analyzes the influence of deviation in the density of the material that is used in mechanical stiffness as core layer of a sandwich surface.

The stresses acting laterally and in the core as well as the deformations of the entire model are compared for different material densities of the core layer. The results of the analysis were contrasted with the results of the structural calculation performed in RFEM.

Due to this analysis, it is possible to verify the influence of the core layer density in the mechanical stiffness of sandwich surfaces. However, no important differences in the surfaces were observed for the density's limit deviations. The entire thesis was carried out with elastic linear conditions.

Feasibility Study on Fibre Reinforced Polymer Slides in the Eastern Scheldt Storm Surge Barrier

2013年09月1日

硕士论文

by Roeland van Straten, De Bult, Netherlands

Delft University of Technology (TU Delft)
Advisor: Prof. ir. F.S.K. Bijlaard
Programs used: RFEM, RF-LAMINATE

The Eastern Scheldt storm surge barrier is a closeable barrier in Southwest Netherlands, which should protect the Southwestern Delta from flooding from the North Sea.

The barrier is constructed with lifting steel slides, which corrode rapidly in the salty environment. The service life of the coating, which should protect the slides, is probably too short, to maintain all the slides before maintenance is neccessary.

Therefore, the state of slides can be deteriorated so much that maintenance costs exceed the costs of replacement of the slides.

Development of Modular System for Water Towers to be Installed in Disaster Areas

2012年07月17日

硕士论文

by Jonas Schmidt, Germany

University of Kassel, Department of Civil Engineering, Building Preservation and Timber Structures
Advisors: Prof. Dr.-Ing. Werner Seim, Claus Hemker (Consulting Architect, Caritas International)
Programs used: RFEM

Frequently, earthquakes and other natural disasters occur in poor regions of the earth. The drinking water supply which is often already insufficient is additionally damaged then, which causes a danger of epidemics. The drinking water supply as well as living under hygienic conditions is important for human existence.

The thesis describes the development of a modular system provided for water towers that can be installed in disaster areas. A functional, anti-seismic supporting structure was developed that is also easy to erect with a few devices and auxiliary tools by semiskilled workers under the guidance of instructors.

The development may contribute to the solution of providing a quick drinking water supply which is required after natural disasters. Moreover, it can be a supply used during the period of reconstruction and beyond. One of the great challenges was to find a way to deal with the need of tools and materials that are limited.

The markets offer only limited timber cross-sections which people have to consider for rebuilding. But also transportation and assembly must be taken into account under the given circumstances. The construction built on the university campus is designed for an earthquake intensity of 5.5, and thus intended to be an immediate measure after the main quake.

After the primary water supply, it is possible to reinforce the construction to prepare it also for main quakes measuring 7.0. The structural system was calculated with RFEM.

Critical Reflection and Evaluation of Two Roof Variants of Clinker Silo in Balingen, Germany

2012年04月10日

硕士论文

by Andrei Prediscan, Konstanz, Germany

Konstanz University of Applied Sciences (HTWG Konstanz)
Advisor: Prof. Dr. Wolfgang Francke
Programs used: RSTAB, add-on modules

The present Master thesis deals with the calculation of a silo roof made of steel that has been supported with different supports.

"I want to thank you for the lightning fast shipping of the program, and I compliment you on the work you've done. It's a great help for civil engineers."

Design of Arch Bridge

2011年12月12日

硕士论文

by Jana Vlachová, Czech Republic

Czech Technical University in Prague, Faculty of Civil Engineering
Advisor: Ing. Roman Šafář Ph.D.
Programs used: RFEM, RF-CONCRETE Members, RF-MOVE, SHAPE‑MASSIVE

The master thesis "Design of Arch Bridge" is focused on the development and design of arches and arch bridges. It includes the conceptual design of the bridge structure. The theoretical part of the thesis comprises partly of the historical research of the topic (arches and arch bridges) and of the analysis of the benefits of various shapes of fixed arches.

The central part of the thesis presents the conceptual design and evaluation of the road bridge over a valley with maximum span 140.0 m and with a total length of 266.9 m. The project is tackled as an arch bridge with prestressed bridge deck. Calculations are performed according to the current standard CSN EN and resolve the issue of arrangement of the structural elements of the bridge, design of prestressing, reinforcement of key elements of the bridge, stability of the structure and construction phases.

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