共查询到20条相似文献，搜索用时 0 毫秒
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Josef Hegger Guido Bertram Tobias Dreßen Michael Horstmann Thomas Roggendorf 《Beton- und Stahlbetonbau》2009,104(1):17-26
Innovative Concepts for Concrete Structures Representing new developments in concrete construction, the present paper covers the four subject areas innovative building concepts, pretensioned beams made of UHPC, building envelopes applying Textile Reinforced Concrete and Slim‐Floor‐Constructions. 相似文献
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Prof. Dr.-Ing. M.Arch. Lucio Blandini Daria Kovaleva Dipl.-Arch. Christoph Nething David Nigl Maiia Smirnova Benedikt Strahm Erik Eppinger Alexander Teichmann 《Beton- und Stahlbetonbau》2023,118(5):310-319
Extended lightweight construction – Part 1: Lightweight materials For more than 20 years, the Institute for Lightweight Structures and Conceptual Design (ILEK) has been engaged in interdisciplinary research on the supposed paradox of “lightweight construction with concrete”. Excerpts from the current research are now presented in a two-part article. This first part considers developments at the material level (lightweight materials) with the aim of minimizing use of primary resources, material-related emissions, and waste in different phases of building life cycle. These include: the substitution of natural aggregates with recycled ones, biomineralized calcium carbonate as an innovative substitute for cement, basalt fiber composite reinforcement as an alternative to conventional reinforcing and prestressing steel, and recyclable sand formworks for zero-waste production of lightweight concrete structures. 相似文献
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《Beton- und Stahlbetonbau》2018,113(9):640-646
Non‐destructive to structural strength – Comparative investigations for rebound hammer testing For decades, rebound hammer testing has been a standardised test method in Germany for estimating the concrete compressive strength class. The test and subsequent evaluation of the results takes into account the relationship between surface hardness and concrete compressive strength. The rebound strengths determined with the original Schmidthammer are based on the measured rebound distance and can be a characteristic value for the elastic behaviour of near‐surface layers of clay structures. In an application period of almost 60 years, the functionality and handling of the Schmidthammer has hardly changed. With the introduction of DIN EN 13791/A20, it's possible to estimate the concrete compressive strength on the basis of the Q‐values since February 2017. The determination of the rebound value takes place with the energy or speed difference and is superior to the older mechanical method (Original Schmidthammer) in some points. Among other things, the measurement results are no longer dependent on the angle of impact, so it will be possible to test inclined concrete surfaces and estimate the compressive strength. 相似文献
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Patrick Forman Christoph Kmper Tobias Stallmann Jürgen Schnell Peter Mark 《Beton- und Stahlbetonbau》2016,111(12):851-861
Parabolic shells made from high‐performance concrete for solar collectors Parabolic troughs for concentrating solar power plants are mainly built as spatial steel frameworks which support curved mirror elements pointwise. Today, significant cost savings can merely be expected from cheaper construction material as shown by a first prototype made from concrete [1]. Alternative concepts inspired by commercially established collector modules with an aperture width of about 6 m as well as large scale collector modules with an aperture width of up to 10 m have been developed within the priority program SPP 1542 „Concrete light” funded by the German Research Foundation (DFG) in cooperation of the Technical University of Kaiserslautern and the Ruhr‐University Bochum. These concepts also differ with respect to support conditions and cross‐sectional shapes. They include single‐walled solid shells with additional bracings according to the flux of forces or employ void formers and associated effective values for bending and axial stiffness. Of course, both fulfill the strict requirements set on lightweight and material efficient structures. Most relevant actions on the parabolic shells result from self‐weight, wind loads and torsional moments due to the driving system, which are considered locally and globally to capture their influence on the shell's design. 相似文献
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Specifications and Application of Textile Reinforced Concrete (TRC) Textile reinforced concrete (TRC) is a new composite with specific properties. This paper should address the needs of a generally understandable introduction into TRC design for practitioners. Because TRC leaves the existing range of application specific properties as well as similarities and differences to steel reinforced concrete will be illustrated. In detail requirements for fibre materials, typical materials and technologies for production of textile reinforcement and TRC are elucidated. The discussion of various case studies of existing applications serve for demonstrating specifics and capabilities of this composite. It also shows important first principles for designing with TRC. A set of typical material data should enable readers to think about applications of this innovative composite. 相似文献
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Carolin Kurz Catherina Thiele Jürgen Schnell Martin Reuter Gerhard Vitt 《Bautechnik》2012,89(8):545-552
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