Knippers Helbig GmbH

Stuttgart Muhlhausen, Germany

Knippers Helbig GmbH

Stuttgart Muhlhausen, Germany
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Peter B.,Knippers Helbig GmbH | Oppe M.,Knippers Helbig GmbH
Stahlbau | Year: 2017

The digitization in the building industry is a chance – about process chains and necessary changes of paradigm. The digitization changes our lives, our society, and all sectors of the economy. So-called disruptors, such as Apple, Google, Uber, and many others lead to a reorganization of an industry in a very short time. Examples of disruptive technologies are among other things the digital camera, the smartphone, the electric car and also the CAD (computer aided design), which has replaced within a very short time the technical drawing with ink pen and drawing board in the 90s (Fig. 1). Digital process change, parametric design and the use of BIM planning method lead increasingly also in the construction industry to basic changes in the planning process and planning interfaces. It enables the planning, calculation and implementation significantly more complex structures, lead to continuous process chains between planning, execution, and use and enable coordinated bundling of all building information in a project database. By changing our processes towards a team-oriented planning method paradigms can be changed and mistakes can be corrected. ”But therefore we must leave the defense, must try out the possibilities and talk together [1]”. Copyright © 2017 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin

Teich M.,Seele Sedak GmbH | Oppe M.,Knippers Helbig GmbH | Jungjohann H.,Knippers Helbig Inc | Helbig T.,Knippers Helbig GmbH | And 2 more authors.
Stahlbau | Year: 2013

The Pérez Art Museum Miami currently under construction in Miami, Florida is designed by Herzog & de Meuron. The vertical glass facades have been designed in close collaboration between seele and Knippers Helbig, fabricated and installed by seele. Miami is well known to be located in a region with high wind loads and risk of hurricanes, requiring compliance to demanding hurricane resistant specifications for the glass façades. Up until now, the large glass units that are planned - up to approx. 5.20 m high and 2.30 m wide - have not been used in this hurricane prone region. All the elements of the façade must prove their robustness in hurricane tests. The panes of glass are fixed to stainless steel rails cast into the ultra-high performance concrete (UHPC) mullions. The joint is either concealed by narrow pressure plates or a toggle-system is used to fix the glass panels to the mullions. Owing to the threat of hurricanes, each pane consists of two double-glazing units with a reinforcing interlayer in between. Here, a demanding owner and even more demanding architects, with the help of seele and Knippers Helbig, are pushing material limits. © 2013 Ernst & Sohn GmbH & Co. KG.

Helbig T.,Knippers Helbig GmbH | Unterer K.,Knippers Helbig GmbH | Kulas C.,solidian GmbH | Rempel S.,RWTH Aachen | Hegger J.,RWTH Aachen
Beton- und Stahlbetonbau | Year: 2016

Pedestrian bridge made from carbon-concrete in Albstadt-Ebingen – First entirely carbon-reinforced concrete bridge worldwide. The bridge erected in Albstadt-Ebingen in October 2015 is realized without any steel reinforcement or pre-tensioning, making it the world's first entirely carbon-reinforced concrete bicycle and pedestrian-bridge. The trough section with material thicknesses of 70 mm (trough walls) and 90 mm (slab) respectively has been fabricated as monolithic pre-cast element. With a span length of 15 m and a width of 3 m, the bridge-deck requires no further coating and has a total weight of just 14 tons (approximately 310 kg/m2); this is about 50 % of comparable conventional reinforced concrete bridge-decks. Besides material and weight savings, an exceptionally long service life with minimal maintenance can be expected, as the steel corrosion that is typical in reinforced concrete structures can be entirely avoided. Since the use of carbon-reinforced concrete (carbon concrete) is not yet approved in Germany, the client had to obtain approval based on individual cases (ZiE). Copyright © 2016 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin

Oppe M.W.,Knippers Helbig Inc | Knippers J.,Knippers Helbig GmbH
Proceedings of the Institution of Civil Engineers: Structures and Buildings | Year: 2011

The use of lightweight and corrosion-resistant construction materials such as pultruded glass-fibre-reinforced polymer (GFRP) profiles in bridges has been increasing in recent years. Even though the use of detachable connections with mechanical fasteners is the most reliable and controlled technique for joining GFRP structures, there is a lack of information on the load-bearing capacity of connections in which the bolts are subjected to tension loads. The results from a series of tests aimed at investigating the load-bearing behaviour of different GFRP connection types where bending or pull-out failure may occur are summarised in this paper. The tests were conducted using standard stainless steel bolts and nuts. Load resistance models are proposed based on the experimental investigations. Furthermore, a partial safety factor is determined using the statistical methods given in EN 1990. Finally, an application of mechanically fastened connections is shown for a GFRP pedestrian bridge erected near Schwerin, Germany.

Knippers J.,Knippers Helbig GmbH | Jungjohann H.,Knippers Helbig Inc. | Scheible F.,Knippers Helbig GmbH | Oppe M.,Knippers Helbig GmbH
Bautechnik | Year: 2013

The Thematic Pavilion "One Ocean", designed by SOMA Architecture, Vienna, is a major and permanent building for the Expo 2012 in Yeosu, Korea. The façade facing the expo area and the main entrance is conducted as kinetic media façade symbolizing the gills of a fish. The façade therefore illustrates the theme of the Expo "The living ocean and coast" very well. Development of the kinetic media façade was inspired by flexible deformation principles found in plant movements. The project is a role model for a novel application of glass fiber reinforced polymers (GFRP) for deployable structures as well as for advanced biomimetic research and design. © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.

Oppe M.,Knippers Helbig Inc. | Knippers J.,Knippers Helbig GmbH
Advances in FRP Composites in Civil Engineering - Proceedings of the 5th International Conference on FRP Composites in Civil Engineering, CICE 2010 | Year: 2011

This paper presents a consistent design concept for bolted connections of standardized GFRP-profiles. All test specimens have been taken either from pultruded flat-profiles or the webs of standard pultrusion I or Uprofiles from Fiberline Composites A/S. At first the orthotropic material properties of the laminates were determined by experimental tests, including short term and long term properties as well as influence of temperature and media. Experimental results have been confirmed by numerical simulations; taking the complex limit state conditions into account introducing the fracture criteria of Puck. Afterwards relevant functions to determine resistances have been developed for different limit state conditions. To obtain characteristic values, these functions have been calibrated according to the reliability requirements of EN 1990. Using simplified engineering models for the practical design of bolted connections therefore a complete and consistent design concept is provided. © Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg 2011.

Helbig T.,Knippers Helbig GmbH | Reiner T.,Broad United States Inc. | Meier F.,Broad United States Inc.
Bautechnik | Year: 2016

The Collier Memorial was constructed on the campus of the Massachusetts Institute of Technology (MIT) to memorialize Officer SEAN COLLIER, who lost his life in the line of duty following the Boston Marathon Bombings. The memorial was designed by Professor J. MEEJIN YOON (Howeler + Yoon Architecture, Boston). The form of the memorial is inspired by the shape of an opened hand; five radially oriented walls come together to support a shallow vault. The form is achieved with monolithic granite stone blocks milled to create the flowing surfaces. This technically challenging project was only possible through close interdisciplinary collaboration. The computer-supported form finding process was based on the static principle of the thrust line theory, and the resulting initial geometry and structural concept were used to develop a complex structural analysis model. The weight of the massive stone blocks was resolved through arch action transferring compressive forces between the blocks. In order to ensure the redundancy and durability of the structure, stainless steel dowels were strategically inserted between blocks at certain locations. These dowels are invisible to the outside observer. Realizing the structure required great care during the construction process, from the preparation of the 32 granite stone blocks to the assembly of the structure on site. These efforts made it possible to achieve this vaulted structure and meet the architect's desire for extreme precision and uniformity in the final sculptural form. © 2016 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.

Pultruded Glass Fibre Reinforced Polymer (GFRP) profiles developed by the firm Fiberline Composites A/S were granted a general technical approval (no. Z-10.9-299) by the German Institute for Building Technology in Berlin in December 2011. This approval is based on extensive theoretical analysis as well as a series of rigorous experiments. Architects and engineers are now able to implement a wide variety of GFRP profiles within the construction and civil engineering fields without the need for elaborate experimental investigations or experts' appraisals, or requiring explicit individual approvals or external monitoring of projects. The technical approval is subject not only to extensive information of material characteristics and properties, but also to a comprehensive design concept based on relevant codes and standards. Several diverse projects have been successfully completed in recent years due to the issuing of the general technical approval. This article focuses on the underlying design concept developed based on this technical approval, extended design checks as well as showcases of some selected national projects realized in Germany. © 2014 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.

Lienhard J.,Knippers Helbig GmbH | Riederer J.,Knippers Helbig GmbH | Jungjohann H.,Knippers Helbig GmbH | Oppe M.,Knippers Helbig GmbH | Knippers J.,Knippers Helbig GmbH
Textile Composites and Inflatable Structures VI - Proceedings of the 6th International Conference on Textile Composites and Inflatable Structures, Structures Membranes 2013 | Year: 2013

As part of the international exhibition 'Bauausstellung' IBA 2013 in Hamburg, Germany, architects from KVA MATx team and engineers from Knippers Helbig Advanced Engineering have developed an integral energy harvesting façade shading system for their 'Softhouse' project. Its overall concept includes an energy harvesting hybrid textile roof featuring flexible photovoltaics, which contributes to create a micro-climate for the building as a shading roof for the terrace and glass façade. This responsive façade is based on a textile hybrid system, using textile membranes and glass fibre reinforced plastics (GFRP) in an intricate form- And bending-active structure. This paper will discuss the multiple design studies that were undertaken to develop a system that satisfies the, at times, diametrically opposed demands from architecture, building physics, structural engineering and technical approval. Furthermore, detailed information will be given on the design specifications for using GFRP in bending-active elements and the Finite-Element simulation techniques used for the form-finding and structural analysis.

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