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
Content: Steel Construction 1/2012 Steel Construction 1/2012 Content

Kurzfassung

Keine Kurzfassung verfügbar.

x
Kuhlmann, Ulrike Eurocode 3 Part 1.5: Plated Structures - new chances and developments Steel Construction 1/2012 1-2 Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

x
Bock, Marina; Chacón, Rolando; Mirambell, Enrique; Real, Esther Hybrid steel plate girders subjected to patch loading Steel Construction 1/2012 3-9 Article

Kurzfassung

Hybrid girders represent an economical alternative to homogeneous girders because they achieve greater flexural capacity with less material. One of the potential applications of hybrid steel plate girders is their use in bridges. One potential method of construction for these bridges is the push launch method in which patch loading may affect the design. The aim of this paper is to present the advanced conclusions of research work dealing with these two fields simultaneously: hybrid steel plate girders subjected to the particular case of patch loading. It is shown that, contrary to the EN 1993-1-5 formulation, the influence of the fyf /fyw ratio (namely, the hybrid grade) is negligible for both unstiffened and longitudinally stiffened girders according to the EN 1993-1-5 assumptions. Suggestions for considering these findings in design codes are provided at the end of the paper.

x
Dr. Norbert Bannenberg reappointed to the Board of Management Steel Construction 1/2012 9 People

Kurzfassung

Keine Kurzfassung verfügbar.

x
Mirambell, Enrique; Chacón, Rolando; Kuhlmann, Ulrike; Braun, Benjamin Statistical evaluation of the new resistance model for steel plate girders subjected to patch loading Steel Construction 1/2012 10-15 Article

Kurzfassung

This paper presents a new resistance model for steel plate girders subjected to patch loading. The model aims to correct the EN 1993-1-5 formulation concerning the resistance to transverse forces with the help of findings presented in several doctoral studies on this topic. In addition, a statistical calibration of the new model is addressed. This calibration includes a new proposal for the resistance function -. The proposal is conceived for fulfilling safety levels of the partial safety factor that match the current values included in EN 1993 for instability-related problems. These new proposals are in accordance with the design philosophy found in EN 1993-1-5 for the design of plated structures.

x
Indispensable: fibre composites in architecture Steel Construction 1/2012 15 News

Kurzfassung

Keine Kurzfassung verfügbar.

x
Dunai, László; Kövesdi, Balázs; Kuhlmann, Ulrike; Braun, Benjamin Design of girders with trapezoidal corrugated webs under the interaction of patch loading, shear and bending Steel Construction 1/2012 16-22 Articles

Kurzfassung

Keine Kurzfassung verfügbar.

x
Sinur, Franc; Beg, Darko Intermediate transverse stiffeners in plate girders Steel Construction 1/2012 23-32 Articles

Kurzfassung

The aim of this paper is to study the design requirements for rigid intermediate transverse stiffeners in longitudinally stiffened plate girders. Firstly, two representative design codes, AASHTO and EN 1933-1-5, are discussed and compared. Then the results of two tests on 1.5 m deep plate girders and the results of the extensive numerical parametric study are presented. The analysis of the results shows that the axial force in the stiffener due to tension field action is overestimated in the design codes and that all the design requirements for rigid transverse stiffeners can be covered by defining a minimum required second moment of area.

x
Braun, Benjamin; Kuhlmann, Ulrike Reduced stress design of plates under biaxial compression Steel Construction 1/2012 33-40 Articles

Kurzfassung

European standard EN 1993-1-5 provides the effective width method and the reduced stress method as calculation methods for plate buckling assessment. This article focuses on the reduced stress method, for which the global slenderness concept was introduced into EN 1993-1-5. The concept offers advantages associated with today’s numerical procedures which allow the elastic critical load factor of the full stress field to be determined in a single step, thus taking interaction into account in a very elaborate way. However, this article shows that the interaction verification in its pure format based on the von Mises yield criterion is not able to represent the actual mechanical behaviour of biaxially compressed plates. A simple modification is proposed which leads to appropriate and plausible results.

x
Economic and Steel Market Outlook 2012-2013 Steel Construction 1/2012 40 News

Kurzfassung

Keine Kurzfassung verfügbar.

x
Nuesse , Gregor; Limbachiya, Mukesh; Ellis , Alan Managing interdisciplinary applied research on sustainability in construction with the help of an innovation broker Steel Construction 1/2012 41-52 Article

Kurzfassung

The article reports on how the steel industry in Germany, as a key supplier of materials and innovations to the construction sector, is carrying out a comprehensive optimization of the management of pre-competitive cooperative research (CR) on steel applications in the construction industry. A significant aspect of this is the central use of an innovation broker (IB) role throughout the innovation process. The varying project expectations of science and industry and the related IB tasks are identified as part of an interdisciplinary research cluster on the sustainability of steel in the construction industry. A task profile is drawn up for the IB in cooperative research on the basis of various key person concepts from industrial innovation research. It is expected that the consistent implementation of this profile will increase the innovation successes from CR between the steel industry and the construction sector.

x
10th International Structural Steel Colloquium Steel Construction 1/2012 52 Conferences

Kurzfassung

Keine Kurzfassung verfügbar.

x
Wang, Yingliang; Huang, Chengzao; Feng, Yuncheng Huangpu Pearl River Northern Channel Bridge, Guangzhou - the longest single-pylon cable-stayed bridge span in China Steel Construction 1/2012 53-60 Report

Kurzfassung

Keine Kurzfassung verfügbar.

x
Leicht France opens in Nantes Steel Construction 1/2012 60 News

Kurzfassung

Keine Kurzfassung verfügbar.

x
Shimanovsky, Aleksandr V. Awaiting the 2012 European Football Championship: some features of the reconstruction of the stadium of the "Olympic" National Sports Centre in Kiev Steel Construction 1/2012 61-65 Report

Kurzfassung

The article presents results of reconstruction and new construction works at the National Sports Center ”Olympic“ stadium in the city of Kyiv, which are being performed in Ukraine as preparations for the final tournament of the UEFA European Football Championship 2012. It describes conceptual designs and layouts involved. Totaling data are presented concerning the number of spectators, the built-up areas, the infrastructure. Structural designs of steel and ferroconcrete constructions are described, results of their computational analysis are included The article also presents data regarding the manufacturing and erection of structures.

x
ECCS News: Steel Construction 1/2012 Steel Construction 1/2012 66-70 ECCS News

Kurzfassung

Conferences
Announcements
Technical Committees (TC) activities
TC News
New Publications
Projects

x
Contents: Structural Concrete 1/2012 Structural Concrete 1/2012 Contents

Kurzfassung

Keine Kurzfassung verfügbar.

x
Annual table of contents 2011 Structural Concrete 1/2012 Annual table of contents

Kurzfassung

Keine Kurzfassung verfügbar.

x
Silfwerbrand, Johan Sustainable concrete is more than just durable concrete Structural Concrete 1/2012 1-2 Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

x
Baird, Andrew; Palermo, Alessandro; Pampanin, Stefano Façade damage assessment of concrete buildings in the 2011 Christchurch earthquake Structural Concrete 1/2012 3-13 Articles

Kurzfassung

The magnitude 6.3 earthquake that struck Christchurch on 22 February 2011 caused widespread damage throughout Christchurch's central business district (CBD), where a large proportion of the building stock consists of reinforced concrete (RC) buildings. Damage to the façades of these buildings was a clear contributor to overall building damage. This paper presents the damage assessment of the façade systems of these RC buildings. A survey of 173 RC buildings in the Christchurch CBD is conducted here, focusing on the damage to the façade systems of the buildings. The survey covers only buildings greater than three storeys in height, excluding the majority of unreinforced masonry façades, the damage to which has been well documented. The façade type and modularity is classified for each system, as well as the connection type where possible. The level of damage to each façade is determined in terms of the following performance levels: Operational, Immediate Occupancy, Life Safety and High Hazard. Further investigation is also made into three precast concrete panel systems. These case studies examine the damage, detailing and construction practice of each particular system.

x
Palermo, Alessandro; Wotherspoon, Liam; Hogan, Lucas; Le Heux, Mitchel; Camnasio, Elena Seismic performance of concrete bridges during Canterbury earthquakes Structural Concrete 1/2012 14-26 Articles

Kurzfassung

In less than six months, the city of Christchurch, New Zealand, experienced two major earthquakes: on 4 September 2010 and 22 February 2011. The former was generated by the rupture of the previously unknown Greendale fault, releasing a magnitude Mw 7.1 earthquake 30-40 km away from the Central Business District (CBD); the latter event, of magnitude Mw 6.2, was less than 10 km from the CBD on an unknown buried fault at the edge of the city. There was widespread damage to the lifelines covering not only Christchurch City but also the closest districts of Selwyn and Waimakariri. The different nature of the fault ruptures and locations of the two events resulted in a variation in damage levels between the earthquakes throughout the region.
Teams from various organizations performed inspections on over 800 bridges throughout the affected Canterbury region. No major collapses were registered among concrete bridges and only 20 bridges required closure due to damage caused by the two earthquakes. Owing to the nature of the Canterbury soils, extensive liquefaction and lateral spreading occurred throughout the region. It was this lateral spreading that caused most of the traffic disruption and closure of bridges, due to damage to the abutments and approaches, foundation settlement and rotation.
The authors aim to give a detailed overview of the damage assessment and seismic performance of the Canterbury bridges during these two earthquakes, emphasizing unexpected issues that are still not properly detailed in New Zealand and overseas standards.

x
Steenbergen, R.D.J.M.; Vervuurt, A.H.J.M. Determining the in situ concrete strength of existing structures for assessing their structural safety Structural Concrete 1/2012 27-31 Articles

Kurzfassung

EN 13791 applies when assessing the in situ compressive strength of structures and precast concrete components. According to the code itself, it may be adopted when doubt arises about the compressive strength of a concrete. For assessing the structural safety of existing structures, however, the method given in EN 13791 does not seem to be applicable and may lead to an unsafe approach for determining the characteristic concrete strength. This paper presents an alternative method for determining the characteristic concrete strength from cylinders obtained in situ. The method proposed is based on EN 1990 (Eurocode basis of design) and the corresponding Annex D. The method according to EN 13791 is outlined in this article. Moreover, the practical implementation of the method in accordance with clause 5.2 of EN 1990 is explained and an example is given. Finally, both methods are compared with each other. It is demonstrated that EN 13791 does not apply to safety assessments of existing concrete structures and the use of this code may lead to unsafe situations.

x
Muttoni, Aurelio; Ruiz, Miguel Fernández The levels-of-approximation approach in MC 2010: application to punching shear provisions Structural Concrete 1/2012 32-41 Articles

Kurzfassung

In order to address how new knowledge influences design expressions, design codes have in most cases become significantly more complex over the last decades. However, this tendency is leading to codes that are too complicated for preliminary design but still not sufficiently accurate for assessing existing structures (where even more realistic models of behaviour are sometimes required). An alternative code strategy is that proposed by codes based on a levels-of-approximation (LoA) approach. This approach is based on the use of theories based on physical parameters where the hypotheses for their application can be refined as the accuracy required increases. The approach proposes adopting safe hypotheses during the first stages of design, leading to relatively quick and simple analyses. In cases where such a degree of accuracy is not sufficient (e.g. design of complex structures, assessment of existing structures, significant potential economic savings), the hypotheses can be refined in a number of steps, leading to better estimates of the behaviour and strength of members. This approach, recently adopted in the first complete draft of Model Code 2010 for a number of design issues, is discussed within this paper with reference to punching shear provisions.

x
Kollegger, Johann; Gmainer, Susanne; Lehner, Klaus; Simader, Josef Ultimate strength of curved strand tendons Structural Concrete 1/2012 42-50 Articles

Kurzfassung

In a bridge construction process, where large concrete elements are rotated with the aid of strand lifting units (lowering of arch halves, balanced lift method), the tendons have to be deviated over saddles with small radii of curvature. Since information on the ultimate strength of curved strand tendons was not available at the time, a test programme was carried out in order to determine the ultimate strength as a function of radius of curvature (R = 0.5 m, R = 1.0 m, R = 3.0 m, straight tendons), number of strands (1 to 55) and type of strand (0.5″ and 0.6″). The results of the full scale experiments showed almost no decrease in efficiency with regard to single strand tendons and only moderate losses regarding multistrand tendons. Based on the experimental results and a biaxial failure criterion, an analytical model was developed which is able to predict the ultimate strength of curved tendons.

x
Graubner, Carl-Alexander; Boska, Erik; Motzko, Christoph; Proske, Tilo; Dehn, Frank Formwork pressure induced by highly flowable concretes - design approach and transfer into practice Structural Concrete 1/2012 51-60 Articles

Kurzfassung

An analytical model for the calculation of the pressure of concrete on vertical formwork has been developed on the basis of experimental tests on highly flowable concretes in the fresh state (see companion paper “Material investigations and large-scale tests”). The model takes into account the time-dependent material parameters of the fresh concrete, the specific properties of the highly flowable vibrated concretes and self-compacting concretes (SCC) as well as operational aspects. A proposal for the design of formwork was developed based on the experimental tests and the semi-probabilistic safety concept. It was found that the design load is often lower than the hydrostatic concrete pressure - even for highly flowable concretes. On construction sites, the pressure can be best controlled by limiting the casting rate. Insufficient experience of personnel in the handling of highly flowable concretes increases the uncertainties with respect to the design values and the safety risk.
Further investigations into construction management-related aspects regarding the use of highly flowable concretes cover the risk assessment during concreting, design of the processes on the construction site and the development of the basis for a documentation system.

x