02 Fakultät Bau- und Umweltingenieurwissenschaften
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Item Open Access Doktorandenkolloquium Holzbau Forschung + Praxis : Stuttgart, 18. + 19. März 2024(2024) Kuhlmann, Ulrike; Grönquist, Philippe; Tapia, Cristóbal; Buchholz, LeaItem Open Access Berichte der Fachtagung Baustatik - Baupraxis 14 : 23. und 24. März 2020, Universität Stuttgart(Stuttgart : Institut für Baustatik und Baudynamik, Universität Stuttgart, 2020) Bischoff, Manfred; Scheven, Malte von; Oesterle, BastianItem Open Access 3rd International Symposium on Connections between Steel and Concrete : Stuttgart, Germany, 27th - 29th September 2017 ; proceedings(Stuttgart : Institute of Construction Materials, University of Stuttgart, 2017) Sharma, Akanshu; Hofmann, JanSteel is an integral part of any concrete construction either in the form of anchors connecting structural/non-structural components to the structure or in the form of reinforcement embedded in concrete or sometimes as a part of steel-concrete composite construction. To ensure structural integrity, it is essential to form a reliable connection between steel and concrete. The anchorage must serve its function well to ensure the interaction between the components connected to the structure and the structure itself. The bond between reinforcement and concrete must be ensured to maintain the required flow of forces from concrete to steel and vice-versa. The concrete and steel structural members must be able to interact with each other in a desired way. If the connection between steel and concrete loses its integrity, the integrity of the entire structure comes in jeopardy. In order to ensure the integrity of connections between steel and concrete, it is required to (i) investigate their behavior through high quality experiments, (ii) evaluate their performance with advanced and reliable computational methods, and (iii) summarize them in practical and reliable design rules and models to be used by engineers and practitioners. Although connections between steel and concrete are used ever since the commencement of reinforced concrete construction, there are several aspects which are yet to be fully understood. Advancement in technologies lead to development of new products such as post-installed anchors, anchor channels, high strength reinforcing bars etc., whose performance in concrete need to be investigated. New concrete based materials such as high performance concrete, fiber reinforced concrete, geopolymer concrete etc. are being developed and their compatibility with the steel components and rebar must be verified. The interaction between structure and the anchorages or concrete and steel structure connected through anchorages need to be understood. Innovative fastening solutions between steel and concrete components are being developed for which reliable design models are needed. Furthermore, several general design issues, e.g. anchorages with supplementary reinforcement, fatigue behavior of anchors, long term performance of bonded anchors, anchor channels under different loading combinations, harmonization of design between post-installed and cast-in place reinforcing bars, influence of corrosion on performance of anchorages and reinforcement etc. need in-depth investigations. In addition, globally, structures are exposed to natural and man-made hazards more than ever, which induce extreme loads on the structural components, e.g. earthquakes, fire, impact and combinations thereof. The performance of existing structures against such hazards has exposed several inherent weaknesses in the past. Often, the performance of structures under such hazards is significantly influenced by the performance of connections between steel and concrete. Since the loads induced in the structures by such hazards cannot be reliably estimated and also since under such loads, compatibility requirements between different components result in additional demands on different components, the designs can only be reliably done following a performance based design approach. Similar approaches must also be developed for the design of connections between steel and concrete to ensure a reliable performance from the connections and in turn from the structures against extreme hazards. One of the most important applications of anchorages is in strengthening of structures for connecting the strengthening element and the parent structure. Every strengthening needs a certain type of anchorage and the performance of the strengthening depends largely on the performance of the anchorage itself. The demands posed on the anchorages used in strengthening (e.g. seismic strengthening) could be very challenging, which includes high forces, large crack widths, combined load and crack cycling, limited area and depth to develop the required resistance etc. In order to ensure the safety of structures, therefore, it is essential to develop innovative strengthening methods along with anchorage techniques that would allow the strengthening to serve its desired function. The 3rd International Symposium on Connections between Steel and Concrete (ConSC2017) aims at bringing the experts from around the globe working in the field of steel-concrete connections to share and discuss the current state-of-the-art as well as the possible future directions to improve the safety of structures by making reliable connections between steel and concrete. The previous two symposia were held in Stuttgart in 2001 and 2007. This symposium offers a platform for the academicians, researchers, industry, regulatory authorities, practicing engineers and students to share the knowledge gained through a decade of research and development. With more than 120 high quality research papers along with the keynote addresses and invited lectures from the renowned experts, this symposium is a significant step forward towards the enhancement of knowledge as well as to provide food for thought for the forthcoming research in the field of connections between steel and concrete.Item Open Access Bond in concrete - bond, anchorage, detailing : 5th International Conference : Stuttgart, Germany, 25th - 27th July 2022 : proceedings(Stuttgart : Institute of Construction Materials, University of Stuttgart, 2022) Hofmann, Jan; Plizzari, GiovanniAlthough concrete and reinforced concrete structures are not considered particularly sustainable, concrete is one of the most important and widely used building material in the world. Structures such as bridges, power plants or tunnels would be inconceivable without reinforced concrete as a building material. The bond between reinforcement and concrete is an essential factor for achieving the desired response from these different reinforced concrete structures. Moreover, bond plays an important role not only in reinforced concrete structures, but also for strengthening and rehabilitation of structures. Due to the necessity of sustainable building methods and need to reduce the spending of resources, the rehabilitation of structures will play an important role in shaping the sustainable future. In addition, our building materials are changing quite rapidly. This applies not only to concrete, but also to reinforcement. Carbon concrete, extreme lightweight or printed concrete, glass fibre or textile reinforcement are just a few examples. Their properties are significantly different from the previously known materials. In combination this can lead to a completely changed bond behavior, which can no longer be described using the existing models. Consequently, this becomes a challenge for all of us working in this field since results and solutions are expected faster than in the past. Therefore, it is important to have a platform that enables exchange of information on the latest results and future development and is also essential to publish and share the findings with the research community. However, this is not the only motivation for organising the Bond in Concrete Conference. The personal exchange and the development of a social network is an additional motivation, which is becoming more and more essential for both work and successful research. The previous conferences in Paisley (1982), Riga (1992), Budapest (2002) and Brescia (2012) are excellent examples for personal and professional networking. This tradition is something we want to continue in Stuttgart (2022) and use this opportunity to enable, encourage and support interdisciplinary research on “bond”. Looking at the recent developments, the description of the bond models and the underlying theories have been further improved and refined in the last few years. As a result, a larger number of influencing factors and loading conditions are considered for describing and quantifying “bond”. Today we know much more about bond than we did 50 years before. But we still don´t know enough about “bond”, it is important to continue and intensive research in the future. Despite all the adversities, uncertainties, injustices and challenges that our society will have to handle in the upcoming years and decades, I am convinced that each one of us is doing their best to make our future worth living. The 5th Conference on “Bond in Concrete" may contribute to this objective.