Carbon-reinforced concrete (CRC) - execution
Table of contents
D - 22 Prestressed precast CRC floor slab
Full title: Development of a slender, prestressed precast floor slab with carbon reinforcement
Prestressed concrete hollow and prestressed TT slabs are very material-efficient and lightweight structures and make an important contribution to sustainability. Nevertheless, they must meet the requirements for durability, serviceability and load-bearing capacity. In building construction, the specifications for sound insulation and fire protection must also be complied with. Prestressing steel is currently used for prestressing. An alternative are carbon fabrics, which can be prestressed in strips and, compared to prestressing steel, allow thinner cross-sections, i.e. slimmer chords and webs.
The aim of the student project is to develop a slender, technically feasible, prestressed precast floor slab using carbon fabrics that is as resource- and material-efficient as possible. A parameter study will analyze which materials and geometries are most suitable for various practical applications. The student will be supervised by the architecture and engineering office Kahnt & Tietze, which develops innovative building systems with various partners. A workplace can be provided both in the office in Dresden and in Leipzig.
Contact person:
Dr.-Ing. Michael Frenzel
Kahnt & Tietze GmbH, Ammonstr. 72, 01067 Dresden
0341 39285 627
D - 21 Heatable CRC for airport pavements
Full title: Optimization of heatable prefabricated carbon-reinforced concrete elements for the structural refurbishment of flight operations areas
As manufacturers and contractors, STL Böden+Design GmbH and STL Heizsysteme GmbH are experts in the development and sale of highly resilient, heatable floors. The objective of the work is to enhance the structural design of the prefabricated components through an analytical verification process, which may be followed by a solid-state simulation. This will be tailored to the specific operational requirements of flight operation areas. The aim is to achieve a load-dependent optimization of the components, which will be validated through subsequent laboratory tests. Previous test results can be utilized as a foundation for this work.
Sub-tasks:
- Literature research into the topic of heavy-duty open-air heating systems
- Familiarization with the rules and regulations for flight operation areas
- Determination of critical structures in the composite heating systems
- Selection and coordination of suitable laboratory tests to create the broadest possible data base
- Simulation to estimate critical stresses and load cases within the composite on the basis of the data
- Development of concepts for improving the component’s structure
Contact persons:
Dipl.-Ing. Enrico Baumgärtel
0351 463 42631
Dr.-Ing. Chongjie Kang
0351 463 37305
D - 20 Study on heatable bridges
Full title: Performance of a simulation between a conventional hybrid bridge with surface heating system and a bridge made of carbon-reinforced concrete modules with integrated heating
As manufacturers and contractors, STL Böden+Design GmbH and STL Heizsysteme GmbH specialize in the development and sale of heavy-duty, heatable floors. This work is based on investigations already carried out into the feasibility of manufacturing heatable prefabricated parts for use as a surface system for cycle and pedestrian bridges. With the available results, a scenario simulation should be conducted to technically and economically compare the use of conventional precast concrete elements with heating coatings against carbon-reinforced concrete precast elements with integrated heating functions in hybrid bridges. In addition, existing plans for conventional hybrid bridges can be used.
Subtasks:
- Calculation of the production-related manufacturing and assembly costs of the bridge structures (conventional and carbon-reinforced concrete)
- Comparison of the different design variants
- Assessment of the advantages and disadvantages of the respective systems
Contact persons:
Dipl.-Ing. Enrico Baumgärtel
0351 463 42631
Dr.-Ing. Chongjie Kang
0351 463 37305
D - 19 Optimization of heatable precast CRC components
Full title: Optimization of heatable prefabricated carbon-reinforced concrete elements as a modular construction kit for bicycle and pedestrian bridges
As manufacturers and contractors, STL Böden+Design GmbH and STL Heizsysteme GmbH are distinguished by their expertise in the development and sale of highly resilient, heatable floors. The objective of the work is to enhance the structural design of the prefabricated components through an analytical verification process, which may be followed by a solid-state simulation. The aforementioned elements are to be adapted to the practically relevant load case as a modular construction kit for covering hybrid bridges in the area of cycle and pedestrian bridges. Upon completion of the project, a prototype will be subjected to a functional testing phase.
Sub-tasks:
- Comprehensive examination of existing literature on the topic of bicycle and pedestrian bridges, with a particular focus on regulations governing design and construction
- Load-oriented component optimization of the prefabricated parts
- Development of concepts to improve the component structure
- Selection and implementation of the preferred variant
Contact persons:
Dipl.-Ing. Enrico Baumgärtel
0351 463 42631
Dr.-Ing. Chongjie Kang
0351 463 37305
D - 15 Construction details forCRC
Full title: Structural design of carbon-reinforced concrete – theoretical and experimental investigation
Compared to steel-reinforced concrete, carbon-reinforced concrete is still a relatively young building material. For this reason, some fundamental questions still need to be answered in the design and dimensioning as well as the structural implementation of carbon-reinforced concrete components. Some of these fundamental questions regarding the structural design of carbon-reinforced concrete components are to be answered within the scope of this work.
Contact person:
Prof. Dr.-Ing. Alexander Schumann
CARBOCON GmbH, Mohorner Str. 13, 01159 Dresden
0351 4820 5511
D - 14 Design of CRC components
Full title: Design and calculation of carbon-reinforced concrete components for new fields of application
Due to its numerous positive properties, carbon-reinforced concrete has already established itself in many areas. Today, for example, facades, parking garages and bridges are built from carbon-reinforced concrete. In addition, a large number of buildings have already been reinforced or repaired with carbon-reinforced concrete. Nevertheless, there are still further fields of application for this innovative building material, which have, however, remained unnoticed. For one of these applications, various carbon-reinforced concrete structures are to be designed, calculated and structurally implemented.
Contact person:
Prof. Dr.-Ing. Alexander Schumann
CARBOCON GmbH, Mohorner Str. 13, 01159 Dresden
0351 4820 5511
D - 11 Anchoring of curved textile reinforcement
Full title: Analytical and experimental investigation of the anchoring effect of 2-D shaped textile reinforcements to improve the bonding properties of carbon-reinforced concrete
The aim of this work is to develop concepts for the shape design of flat textile reinforcements made of CFRP (carbon fiber reinforced polymer) in the end-anchoring area of carbon-reinforced concrete (CRC) elements. With the help of these concepts, it shall be possible to fully utilize the mechanical properties of CFRP over the shortest possible anchorage length and to prevent premature failure of the composite CRC.
First, literature research regarding the material behavior of CFRP and CRC as well as the influence of the anchoring length of reinforcement in concrete is required. Based on this study, geometric shapes are to be designed and anchoring variants are to be developed in consultation with the supervisor. These will then be compared with each other and preferred variants for the experiments will be derived. The scope of the experiment is determined during the work in consultation with the supervisor. In the last part of the work, the preferred geometries are to be prototypically incorporated into a textile CFRP fabric and then small structures are to be concreted. The manufactured test specimens will be examined experimentally. A comparative discussion of the influences on the anchorage length and the failure behavior concludes the study.
Details of the task will be specified during the processing time.
Contact person:
Dipl.-Ing. Berk Gündogdu
0351 463 39419