abo_gift abo_online abo_print abo_student abo_test angle_left angle_right angle_right_filled arrow_big_down arrow_big_down_filled arrow_big_left arrow_big_left_filled arrow_big_right arrow_big_right_filled arrow_big_up arrow_big_up_filled arrow_dropdown_down arrow_dropdown_up arrow_small_left arrow_small_left_filled arrow_small_right arrow_small_right_filled arrow_stage_left arrow_stage_left_filled arrow_stage_right arrow_stage_right_filled caret_down caret_up close close_thin close_thin_filled contact download_thick download_thick_filled download_thin download_thin_filled ebook edit element_headline element_label element_relatedcontent lock mail minus page page_filled pages pages_filled phone plus print print_filled quotationmarks_left quotationmarks_right search send share share_filled shoppingcart_big shoppingcart_big_filled shoppingcart_header shoppingcart_small shoppingcart_small_filled social_facebook social_googleplus social_linkedin social_pinterest social_twitter social_xing social_youtube user_big user_small

Artikeldatenbank

Filter zurücksetzen
  • Autor(en)

  • Sprache der Veröffentlichung

  • Erschienen

  • Rubrik

Zeitschriften-Selektion

  • Alle auswählen Alle abwählen
Autor(en) Titel Zeitschrift Ausgabe Seite Rubrik
Höglund, Torsten A unified method for the design of steel beam-columns Steel Construction 4/2014 230-245 Articles

Kurzfassung

In Eurocode 3, Part 1-1 [1] two methods are given for the design of beam-columns. They have been criticized for their complexity. Furthermore, internal plastic redistribution of stresses of class 3 cross-sections is not utilized in the code. These shortcomings were resolved in proposal for amended rules in [5], however, the procedures for beam-columns are still complicated and difficult to understand.
An approximate method for the design of beam-columns was proposed 1968 in [6] which was addressed in the Commentary to the Swedish regulations for steel structures [10] and used in Sweden since then [11]. It was accepted also in Eurocode 9 for aluminium [4], where it is especially convenient to allow for softening of the material at local transverse welds, see [9]. The method is here proposed to be included also in Eurocode 3.
In this paper the resistance of class 3 cross-sections is discussed and the unified method for beam-columns is presented. Four worked examples are presented, three of them on rather complicated structures, to show the capability to treat such structures as well.

x
Call for Contributions Steel Construction 4/2014 245 News

Kurzfassung

Keine Kurzfassung verfügbar.

x
Kido, Ewa Maria; Cywi ski, Zbigniew The new steel-glass architecture of air terminals in Japan Steel Construction 4/2014 246-251 Report

Kurzfassung

Steel-and-glass structures for buildings, railway stations and airports are currently representatives of modern infrastructure worldwide. The first two, characteristic of Japan, have been discussed in previous articles [1], [2]. In this paper the authors look at Japanese air terminals.

x
XIII International Conference on Metal Structures Steel Construction 4/2014 251 News

Kurzfassung

Keine Kurzfassung verfügbar.

x
Helbig, Thorsten; Giampellegrini, Laurent; Oppe, Matthias "Carioca Wave" - A free-form steel-and-glass canopy in Rio de Janeiro, Brazil Steel Construction 4/2014 252-257 Reports

Kurzfassung

The elegant free-form steel-and-glass canopy covers the atrium of the redevelopment of the “CasaShopping” luxury home furnishings centre in Rio de Janeiro, Brazil. The eye-catching sculptural shape of the canopy is inspired by the ocean waves of the nearby seaside of Barra di Tijuca. The “Carioca Wave” rises out of a pool at ground level and arches over the atrium to provide a link between the shops and the main entrance at the lower level. The complex geometry of the structure places high demands on construction. The high-precision node-beam system was prefabricated in Europe in order to allow fast and simple assembly and erection on site. The free-form steel-and-glass structure - one of the first of its kind in South America - was developed in a collaborative design-and-build project between architect Nir Sivan (Rome, Italy), special contractor se-austria (Schoerfling, Austria) and Knippers Helbig advanced engineering (Stuttgart, Germany).

x
Plieninger, Sven; Gebreiter, Daniel; Mühlberger, Jörg; Justiz, Stefan The grid-shell of Jinji Lake Mall - Rise like a Phoenix Steel Construction 4/2014 258-261 Reports

Kurzfassung

Jinji Lake Mall, a 290,000 m² shopping and entertainment centre, will be centrepiece to a development of several super-high-rise buildings by the waterfront of Jinji Lake in Suzhou, China. Visible from the surrounding skyscrapers, the appearance of the “fifth façade” became of paramount importance. In response, the architectural design foresaw a continuous, 35,000 m² free-form glass roof to cover the four individual buildings of the mall ensemble.
schlaich bergermann and partner consulting engineers were tasked with the structural design of the roof whose shape was inspired by the wings of a phoenix. To alleviate excessive in-plane stresses in the roof, a rigid triangulated grid was discarded in favour of a more elastic quadrangular frame system, requiring the generation of a quad-dominant topology on the free-form surface. The complex interplay between base buildings and roof structure required that all analysis be done on a combined model including roof, tree columns and sub-structure.
Multi-resolution mesh modelling stood at the core of a generative work-flow which mathematically optimized for geometric and structural criteria in the same process. Furthermore, geometrically similar facets were grouped and subsequently assigned the same panel, reducing the unique panel count.

x
Imbrenda, Andrea The MAST (Manufacture Arts Experimentation Technology) multipurpose building - steel structures for urban transformation Steel Construction 4/2014 262-266 Reports

Kurzfassung

The linear architecture of the MAST (Manufacture Arts Experimentation Technology) multipurpose building in Bologna hides a complex combination of functions and spaces surrounding the core of the building and forms its raison d’être: the sublimation of innovation in manufacturing industry within the retrospective heritage of art and its projection in human memory. In this way, factors normally regarded as secondary to industrial activity become a central part of it and are acknowledged as its true roots and instinctive vision. The building acts as the vehicle for a declaration that there are no innovative ideas other than those arising from the interaction between memory and the capacity to project. The functional distribution traces a passage from emotive education (nursery) through formal teaching (classrooms) and the conservation of memory (museum and exhibition area) to listening (auditorium). Each function is acknowledged, not as a self-contained unit, but rather as a component part of the driving force of innovation, which propels a capacity for technological process that is anything but sterile. In such a setting, the steel structures are the very symbol of the transition from tradition to innovation [1].

x
Walter, Peter; Kern, Andreas Material modelling as a tool for the quality assurance and product development of heavy plate steels for steel construction Steel Construction 4/2014 267-273 Reports

Kurzfassung

Shorter product development cycles and compliance with exact process parameters during the production of high-strength heavy plate for heavy machine construction requires fast modelling of mechanical and technological material properties during the actual production process. To this end, the Heavy Plate Unit at ThyssenKrupp Steel Europe AG has used state-of-the-art calculation tools from collections of process data and test value databases. This report describes the step-by-step development of the underlying material models, their implementation in practical computer software and their practical application illustrated by some selected examples.

x
"Sustainable Steel - Policy and Indicators 2014" published Steel Construction 4/2014 273 News

Kurzfassung

Keine Kurzfassung verfügbar.

x
Berrais, Abbes; Pollitt, Kieran An excel based design tool for end plate connections to Eurocode 3 Steel Construction 4/2014 274-279 Reports

Kurzfassung

The design of moment-resisting joints can often be a laborious task if performed by manual calculation. This leads to potential rising of unnecessary labour costs when industry approved design tool would otherwise suffice. Steel connection designers are charged with specifying joint components such as plates, welds and bolts required that have structural capacity to transmit the loads which the connection is exposed to. This said connection design and its components need to be economical with regards to cost. However, a balance needs to be reached between the over-design of the connection leading to excessive capacities, and the finite element design that provides the connection with just what it needs to resist such loads.
The aim of this paper is the description of an Excel based tool for the detailed design of bolted end plate connections between beams and columns in accordance to Eurocode 3. The design tool is practical, user friendly with minimum manual input and relatively transparent such that it provides the user with an easy step-by-step guide during the design process.

x
Bögle, Annette; Kurrer, Karl-Eugen Jörg Schlaich at 80 Steel Construction 4/2014 279-281 Reports

Kurzfassung

The Stuttgart School was the first movement to combine the style of and training in architecture, taught and supported at the Stuttgart College of Technology. The Stuttgart School of Building Design is losing visibility just as the profile of architects in society is rising. However, a thoroughgoing analysis of its particular qualities is overdue, especially in the context of creative construction engineering. For example, Bill Baker (*1953), a Structural and Civil Engineering Partner at Skidmore, Owings & Merrill LLP (SOM), Chicago, USA and winner of the 2009 Fritz Leonhardt prize, has described the creative approach as a key element in (civil engineering) training at the University of Stuttgart. Towards the end of the 20th century, the Stuttgart School of Building Design was greatly influenced by Jörg Schlaich (*17th October 1934), whose working, teaching and research methods also helped inspire the creative approach praised above.

x
Corrections and amendments to Kathage et al. Steel Construction 4/2014 281 Corrigendum

Kurzfassung

Keine Kurzfassung verfügbar.

x
ECCS News: Steel Construction 4/2014 Steel Construction 4/2014 282-284 ECCS News

Kurzfassung

Events
Announcements
Technical Committees (TC) activities
TC News
Further ECCS News

x
Announcement: Steel Construction 4/2014 Steel Construction 4/2014 284 Announcement

Kurzfassung

Keine Kurzfassung verfügbar.

x
Contents: Structural Concrete 4/2014 Structural Concrete 4/2014 Contents

Kurzfassung

Keine Kurzfassung verfügbar.

x
Glavind, Mette Innovations in concrete for sustainable infrastructure constructions Structural Concrete 4/2014 439-440 Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

x
Dahl, Kaare K. B. Bella Sky Hotel - taking precast concrete to the limit Structural Concrete 4/2014 441-447 Technical Papers

Kurzfassung

The Bella Sky Hotel consists of two towers each leaning away from each other at an angle of 15°. The basic principle is vertical loadbearing walls with precast concrete hollow-core floor slabs.
At the ends of the building, inclined walls are used to carry the vertical walls above where they are undercut. At these junctions the horizontal forces induced by turning the vertical forces are huge, and need to be transferred through the floors into the longitudinal walls. The complexity of the structure comes from the number of openings in these walls for doors and services in conjunction with the enormity of the horizontal loads from the lean of the building.
The use of precast elements meant that the forces had to be transferred through the joints in the elements. Severe reinforcement congestion - plus the fact that most of the geometry throughout the building is unique - led to an enormous design and engineering effort required to produce a solution.
The final result is a simple, elegant hotel structure that with one of the greatest leans of any building worldwide jumps into the record books.

x
Clark, Gordon Challenges for concrete in tall buildings Structural Concrete 4/2014 448-453 Technical Papers

Kurzfassung

Tall buildings present unique challenges in terms of both design and construction. The definition of tall is always a matter for debate and actually is related to the proportions of the building, although the actual physical height does also result in other influences such as extreme lateral loading.
Concrete features prominently in providing the structural material for most cores and framing options, thus ensuring stability of the structure. The core of a tall building is important structurally as well as for forming the spine for vertical transportation and services. There can be a wide choice of size and shape, which is dictated in part by the geometry of the building and the site.
This paper focuses on some of the issues for concrete, which is a key material in tall building construction, and is based on some of the work of an fib task group that has been formed to bring together important guidance based on experience of design and construction.

x
Reinhardt, Hans-Wolf Aspects of imposed deformation in concrete structures - a condensed overview Structural Concrete 4/2014 454-460 Technical Papers

Kurzfassung

Imposed deformation is a special case of loading that gets much less attention than mechanical loading due to external forces. However, imposed deformation can impair the serviceability of structures such as tightness and durability. Imposed deformations are due to shrinkage of concrete and temperature variations. The boundary conditions play an important role when analysing stresses due to imposed deformation. This paper provides an overview.

x
Theiner, Yvonne; Andreatta, Andreas; Hofstetter, Günter Evaluation of models for estimating concrete strains due to drying shrinkage Structural Concrete 4/2014 461-468 Technical Papers

Kurzfassung

The present contribution focuses on a comparative study of shrinkage prediction models according to the European Standard Eurocode 2 (EC2), the recommendation by ACI committee 209 and fib Model Code for Concrete Structures 2010. The estimated ultimate drying shrinkage strains and the predicted evolution of drying shrinkage strains are compared with respective shrinkage strains measured on normal-strength concrete specimens of different sizes. For all prediction models, the estimated ultimate values are found to agree quite well with the ultimate drying shrinkage strains measured on thin concrete slices. Whereas the evolution of drying shrinkage strains measured on small concrete prisms agree quite well with the predicted values, substantial differences between code values and experimental data are encountered for larger specimen sizes.

x
Scott, Richard Serviceability uncertainties in flat slabs Structural Concrete 4/2014 469-483 Technical Papers

Kurzfassung

Service load tests on the 6th floor of the full-scale reinforced concrete building at BRE Cardington are described. Both deflections and reinforcement strains were measured. Finite element analyses of the floor slab were then undertaken using the measured material properties and four different models for the behaviour of the concrete in tension, the tension stiffening effect being known to influence slab behaviour significantly. Calculated deflections and reinforcement strains from the four analyses were compared with values measured in the load tests. As a consequence, comments, reservations and recommendations are made concerning the use of FE analyses for predicting deflections and reinforcement strains. Finally, the need to appreciate and accommodate the indeterminate nature of many of the parameters involved is emphasized.

x
Winkler, Karsten; Mark, Peter; Heek, Peter; Rohländer, Sandra; Sommer, Simone Punching shear tests on symmetrically reduced slab quarters Structural Concrete 4/2014 484-496 Technical Papers

Kurzfassung

Experiments on large-scale reinforced concrete members such as beams or slabs with large effective depths are challenging and - not least due to the extensive material and financial input - rarely performed. However, results from such experiments are desperately needed, as critical size effects affect shear and punching shear failure types. At the Institute of Concrete Structures at Ruhr-Universität Bochum (RUB), an innovative test setup was devised following the principle of “upsizing by downsizing”. It transfers symmetry reductions - a standard feature in numerical simulations - to experiments. Thus, test loads and dead loads decrease markedly in proportion to the degree of symmetry, giving rise to larger specimens within given testing facilities. The setup enables tests on symmetrically sectioned concrete members - halved beams or quarters of slabs - concurrently implying the load-deformation behaviours of corresponding, i.e. full-size members, by simply factoring the loads with twice the axial symmetry degree.
This paper presents the single steps in the development to test quartered slabs, including the modular support constructions with sliding planes and anchoring of the bending reinforcement as well as the concrete specimen itself, with interconnections to the symmetry planes, measuring techniques and its specific assembly. Results from a first prototype testing prove the general applicability for failure modes, crack patterns and kinematics. However, ultimate punching loads are still slightly overestimated.

x
Siburg, Carsten; Ricker, Marcus; Hegger, Josef Punching shear design of footings: critical review of different code provisions Structural Concrete 4/2014 497-508 Technical Papers

Kurzfassung

Eurocode 2 and the corresponding National Annex were introduced in Germany in 2012. Most of the design provisions for these new standards were adopted from Model Code 1990 and provide a new design approach for ground slabs and footings. For the fib Model Code for Concrete Structures 2010, the punching shear design concept has been revised and introduced in Swiss standard SIA262:2013. This paper presents in detail the design equations for determining the punching capacity according to Eurocode 2, the German National Annex to Eurocode 2, fib Model Code 2010 and SIA 262:2013.
Parametric studies have been used to examine the influence of the main parameters (shear span-depth ratio, effective depth, longitudinal reinforcement ratio and concrete compressive strength) on the punching shear resistance of footings. To quantify the level of safety and the efficiency, the design provisions are compared with systematic test series.

x
Abdellahi, Majid; Heidari, Javad; Bahmanpour, Maryam A new predictive model for the bond strength of FRP-to-concrete composite joints Structural Concrete 4/2014 509-521 Technical Papers

Kurzfassung

In this work, gene expression programming (GEP), as a new tool, has been used to predict the bond strength of fibre-reinforced polymer-to-concrete composite joints as the performance symbol of this structure. Some 238 datasets were collected from the literature, divided into 192 and 46 sets at random and then trained and tested respectively by means of GEP. The parameters width of prism, concrete cylinder compressive strength, width of fibre-reinforced polymer (FRP), thickness of FRP, modulus of elasticity of FRP and bond length were used as input parameters. Using these input parameters, the bond strength of FRP-to-concrete composite joints in different conditions was predicted in the GEP model. The training and testing results in the GEP model show that GEP is a powerful tool for predicting the bond strength values of the FRP-to-concrete composite joints in the range considered.

x
Hertz, Kristian; Castberg, Andreas; Christensen, Jacob Super-light concrete decks for building floor slabs Structural Concrete 4/2014 522-529 Technical Papers

Kurzfassung

This paper presents investigations carried out at the Technical University of Denmark (DTU) on a prototype series for a super-lightweight prestressed concrete deck element called the SL-Deck.
The intention behind making a new prefabricated deck element is to improve performance with respect to flexibility, sound insulation and fire resistance compared with present-day prefabricated structures.
Full-scale tests and theoretical investigations show that the deck structure performs as intended. Also, that it is possible to assess by calculation the loadbearing capacity in bending and shear, and assess the pull-out strength of prestressing wires, the fire resistance and the acoustic insulation. Based on the results of the investigations, recommendations are given for further development of the structure before fully automated mass production is established.

x