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IOC/IAKS Awards 2014: Preisgekrönte Sport- und Freizeitanlagen Stahlbau 1/2014 60-61 Aktuell

Kurzfassung

Keine Kurzfassung verfügbar.

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Salomon, Rainer Einsatz der Schweißsimulation zur systematischen Entwicklung verbesserter Modelle für die Berechnung der Tragfähigkeit komplexer Stahlleichtbaustrukturen (P 785) Stahlbau 1/2014 61-62 Aus der Forschung

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Keine Kurzfassung verfügbar.

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Rogge, Andreas Materialprüfung im Bauwesen. Von F. Schmidt-Döhl Stahlbau 1/2014 62 Rezensionen

Kurzfassung

Keine Kurzfassung verfügbar.

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Recht: Stahlbau 1/2014 Stahlbau 1/2014 62-63 Recht

Kurzfassung

Mangelhafte Stromversorgung der Baupumpenanlage
Computerschaden durch Bauarbeiten
Haftung für Schneelast auf dem Dach

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Termine: Stahlbau 1/2014 Stahlbau 1/2014 63-64 Termine

Kurzfassung

Keine Kurzfassung verfügbar.

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zu Chladný, E., Stujberová, M.: Frames with unique global and local imperfection in the shape of the elastic buckling mode. Part 1. Stahlbau 82 (2013), H. 8, S. 609-617, Part 2. Stahlbau 83 (2013), H. 9, S. 684-694. Stahlbau 1/2014 64 Berichtigungen

Kurzfassung


Comments
a) Comment to Table 1 in Stahlbau 2013/8Formulae in Table 1 may be used for ­following purposes:1. Determination of the position for the critical cross-section m2. Calculation of init,m(x), init,m,m and MIIhinit,m(x)3. Elastic verification of the buckling ­resistance 4. Plastic verification of the buckling ­resistanceaa) For the elastic verification of the buckling resistance:Use all the formulae with elastic cross-section characteristics for purposes 1, 2, 3.ab) For the plastic verification of the buckling resistance:For purposes 1and 2 use all the ­formulae with elastic cross-section characteristicsFor purpose 4 use the formula (15) with MRd(x) = Mpl,Rd(x)b) Comment to Table 4 and Table 6Due to the error in 5.1.1.2 b) and c) shown in the table above the values of NIIhint and of MIIhint in the table 4 are 1,133-times greater than the correct ones. But the difference in utilisation for frame columns shown in the column [5.2.2(3) b + 5.3.2(11)] in the table 6 is due to small contribution of imperfections effect negligible and conclusions in 6 are not INFluenced by this.Wir bitten um Entschuldigung und ­Beachtung. Die Redaktion

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Content: Steel Construction 1/2014 Steel Construction 1/2014 Content

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Keine Kurzfassung verfügbar.

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Stadler, Martin; Mensinger, Martin Simplified finite element analyses for fire design of slabs including membrane action Steel Construction 1/2014 1-7 Articles

Kurzfassung

Simplifications to finite element models are the subject of this article. These simplifications form part of a new method for the fire design of concrete and composite slab systems with partly unprotected secondary steel beams, taking into account tensile membrane action. Internal forces can be determined with the simplified model and cross-section design procedures can be applied to calculate the required reinforcement amount equivalent to ambient temperature. The FE model is simplified by replacing the thermal analysis with a substitute thermal loading. Non-linear material behaviour is taken into account via a reduced model stiffness, which allows an efficient linear elastic calculation. The new method presented therefore enables the simple and efficient design of slab systems for fire.

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Heinisuo, Markku; Perttola, Henri; Ronni, Hilkka A step towards the 3D component method for modelling beam-to-column joints Steel Construction 1/2014 8-13 Articles

Kurzfassung

This paper deals with the component method for the structural design of steel joints in the 3D modelling of loads. The essential features of the method are presented in terms of the local and global analysis model. There is a discussion about the location of the local joint model, the definition of generalized joint displacements and the generic nature of the method. The proposed method is verified for a beam-to-column joint. Verification is carried out by a detailed 3D non-linear finite element analysis of a single joint. Other results in the literature are discussed briefly. One of the new components used in 3D modelling is introduced here. The proposed 3D component method seems to work rather well for moment resistances of joints in both ambient and fire conditions. Initial rotational stiffness needs to be studied more. Validation of the 3D component method is continuing with experiments on the end plate splice joints of rectangular tubular structures.

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Misiek, Thomas; Käpplein, Saskia Strength and stiffness of shear-loaded fastenings for metal members and sheeting using fastening screws and rivets Steel Construction 1/2014 14-23 Articles

Kurzfassung

The paper deals with the strength and stiffness of fastenings with fastening screws or rivets in thin-walled sheeting and sections. After a brief review of the design equations given in some codes, an additional proposal is given. A further review covers the stiffness equations from both codes and research papers, and concludes with a recommendation for applications.

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Helbig, Thorsten; Scheible, Florian; Kamp, Florian; Schieber, Roman Engineering in a computational design environment - New Terminal 3 at Shenzhen Bao'an International Airport, China Steel Construction 1/2014 24-31 Reports

Kurzfassung

Shenzhen Airport’s Terminal 3 is one of the largest buildings in the world designed with parametrically controlled digital tools. These tools enabled the teams from Fuksas and Knippers Helbig to develop the free-form, perforated, double-skin building envelope into which a space truss structure is integrated. The inherent optimization potential of the iterative process not only facilitated the geometrical definition of a large number of unique, non-repetitive components, but also resulted in a successive performance improvement for the integrated structural system.
In a close collaboration with the architects, specific solutions were developed to provide sufficient structural integrity for the space structure, which is clad by the façade layers. These design interventions enable the mega-structure to withstand all impacting loads, such as high winds and seismic loads, without disrupting the transparency of the architects’ intended honeycomb-shaped perforations.
The design process of the new Terminal 3 clearly demonstrates how parametrically controlled design tools can offer the means to design new structures and envelopes that go beyond existing typologies.

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Bedair, Osama Modern steel design and construction in Canada's oil sands industry Steel Construction 1/2014 32-40 Reports

Kurzfassung

The continuous improvements in Canada’s oil sands industrial performance have generated engineering challenges that are rarely encountered in conventional oil and gas projects. Significant developments in steel construction procedures have evolved over the past few years to cope with these challenges. New design guidelines have been developed to modernize structural steel design and construction procedures. These procedures have been successfully implemented in oil sands projects that worth billions of dollars. The author was involved in the design developments for these projects and would like to share with readers the difficulties and solutions used to cope with structural challenges that are not addressed by North American or European codes of practice.

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Hightex wins the IAA Award of Excellence for fabric art Steel Construction 1/2014 40 News

Kurzfassung

Keine Kurzfassung verfügbar.

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Friedrich, Heinz Orthotropic steel bridges in Germany Steel Construction 1/2014 41-47 Reports

Kurzfassung

This document describes the development and state of the art of orthotropic steel bridges in Germany. Following a short historical review of the performance of orthotropic bridge decks over the last decades, the present traffic loads are described and related to the resistance of the existing structures. Based on four different hazard categories, this paper describes different retrofitting methods. Although several promising strengthening techniques are introduced and evaluated, it appears that further research is urgently required in order to improve these techniques.

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Nozhova, Ekaterina Between geometry and craft: the setting-out of the NiGRES Tower Steel Construction 1/2014 48-55 Reports

Kurzfassung

In 1899 Vladimir Shuchov (1853-1939), the polymath Russian engineer, was awarded a patent covering the principles he had devised for hyperbolic lattice towers. These hyperbolic towers are constructed from an assembly of straight elements connected together with complex three-dimensional joints. However, their full geometry is difficult to discern from the (orthogonal) drawings still available. Until now, little was known about the technological advances that made these complex designs feasible. This paper presents an investigation into the mathematical principles and operational practices that may have been used for determining the actual geometry of individual elements for setting out and constructing the metal lattices, thus illuminating the conjunction of geometry and craft.

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Beckh, Matthias; Barthel, Rainer Wind forces on hyperbolic lattice towers Steel Construction 1/2014 56-58 Reports

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Keine Kurzfassung verfügbar.

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ECCS News: Steel Construction 1/2014 Steel Construction 1/2014 59-61 ECCS News

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Events
Announcements
Technical Committees (TC) activities
TC News
Publications

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Announcement: Steel Construction 1/2014 Steel Construction 1/2014 61 Announcement

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Keine Kurzfassung verfügbar.

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Contents: Structural Concrete 1/2014 Structural Concrete 1/2014 Contents

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Keine Kurzfassung verfügbar.

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Annual table of contents 2013 Structural Concrete 1/2014 Annual table of contents

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Keine Kurzfassung verfügbar.

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Lu, Xilin Precast concrete structures in the future Structural Concrete 1/2014 1-2 Editorial

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Keine Kurzfassung verfügbar.

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Xiao, Jianzhuang; Li, Long; Tam, Vivian W.Y.; Li, Hong The state of the art regarding the long-term properties of recycled aggregate concrete Structural Concrete 1/2014 3-12 Technical Papers

Kurzfassung

This paper reviews the long-term properties of recycled aggregate concrete (RAC), including long-term strength, shrinkage, creep, carbonation resistance, antifreeze resistance, impermeability, abrasion resistance, alkaline aggregate reactions, sulphate corrosion and fatigue behaviour. Most studies have shown that the long-term properties of RAC are inferior to those of natural aggregate concrete (NAC), and some researchers have observed that the long-term properties are better than those of NAC. RAC's long-term properties are affected by many factors such as recycled coarse aggregate (RCA) replacement percentage, water-cement ratio, mineral admixtures and mix proportions. The long-term properties of RAC can be improved through better control of these factors. This paper will be helpful for a comprehensive understanding of and further research on RAC, and provides an important basis and references for the engineering applications of RAC.

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István, István; Windisch, Andor; Farkas, György Resistance of reinforced concrete members with hollow circular cross-sections under combined bending and shear - Part I: experimental investigation Structural Concrete 1/2014 13-20 Technical Papers

Kurzfassung

Part I of this paper introduces an experimental programme carried out on RC members with thick-walled hollow circular cross-sections to study their behaviour under combined bending and shear. The study looked at ultimate resistance and propagation of characteristic crack pattern as well as the shape and behaviour of the failure sections as a function of wall thickness, amount of longitudinal and transverse reinforcement, shear span and axial force. Test results were used to verify a newly developed calculation model describing the behaviour of the members investigated at failure under combined bending and shear. This model will be presented in Part II.

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Völgyi, István; Windisch, Andor Resistance of reinforced concrete members with hollow circular cross-section under combined bending and shear - Part II: New calculation model Structural Concrete 1/2014 21-29 Technical Papers

Kurzfassung

Part II analyses the applicability of current shear design models for RC members with a hollow circular cross-section on the basis of experimental results introduced in Part I of this paper. A new calculation model is proposed which assigns the contribution of the concrete zone in compression to shear resistance. The proposed model takes into account how the flexural and shear reinforcement, the load-to-support distance and the shape of the cross-section affect the shear resistance.
The model is based on the analysis of potential failure sections subjected to bending and shear, and applies a compatibility criterion that considers how the member carries the load. The analogy between the failure of the concrete compression zone and the failure of the soil along a sliding surface are presented as well as the conditions for the development of the failure section.

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Onysyk, Jerzy; Biliszczuk, Jan; Prabucki, Przemys?aw; Sadowski, Krzysztof; Toczkiewicz, Robert Strengthening the 100-year-old reinforced concrete dome of the Centennial Hall in Wroc?aw Structural Concrete 1/2014 30-37 Technical Papers

Kurzfassung

The Centennial Hall, a reinforced concrete structure with an auditorium for 10000 people, was opened in Wrocław, Poland (then Breslau, Germany), in 1913 after two years of construction. Its dome, covering the whole building, has a diameter of 65.0 m and in the year it was completed was the largest reinforced concrete dome in the world. This broke the previous record, held by the dome of the Pantheon in Rome (43.3 m), which had lasted for 1787 years. This paper describes the structure of the building, its condition after 100 years of use and the renovation works carried out in 2009-2011. An important part of the renovation was strengthening the lower (tension) ring of the ribbed dome by way of external prestressing. Details concerning the assessment of the technical condition of the hall, numerical calculations and the proposed system of strengthening are presented. In 2006 the monumental Centennial Hall was listed as a UNESCO World Heritage Site for its pioneering reinforced concrete structure, designed in the style of modernism.

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