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
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.

x
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.

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

Kurzfassung

Keine Kurzfassung verfügbar.

x
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.

x
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.

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

Kurzfassung

Keine Kurzfassung verfügbar.

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

Kurzfassung

Events
Announcements
Technical Committees (TC) activities
TC News
Publications

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

Kurzfassung

Keine Kurzfassung verfügbar.

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

Kurzfassung

Keine Kurzfassung verfügbar.

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

Kurzfassung

Keine Kurzfassung verfügbar.

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

Kurzfassung

Keine Kurzfassung verfügbar.

x
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.

x
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.

x
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.

x
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.

x
Souza, Osvaldo Luiz de Carvalho; Sánchez Filho, Emil de Souza; Vaz, Luiz Eloy; Silva Filho, Júlio Jerônimo Holtz Reliability analysis of RC beams strengthened for torsion with carbon fibre composites Structural Concrete 1/2014 38-44 Technical Papers

Kurzfassung

Two sets of reliability analyses for two beam series strengthened with carbon fibre composites (CFC) in different ways and subjected to torsional moments are described in this paper. The analyses consider three failure functions and the system is regarded as a series system formed by these three limit state modes.
Five random variables are taken into account in the first set of analyses. The analyses are performed for different torsional moment ratios, defined as the ratio of the torsional moment due to live loads to the total torsional moment. The system reliability indexes and the factors of importance associated with each random variable are obtained. In the second set of reliability analyses, only the two most relevant random variables selected in the first set of analyses according to the values of their factors of importance are considered, and new reliability indexes are determined. The examples show that despite the constant value of the total torsional moment, the increase in the torsional moment ratio leads to a decrease in the system reliability levels. The fact that the values of the reliability indexes obtained in both sets of reliability analyses are very similar validates the efficiency of the sensitivity analyses.

x
Cairns, John Staggered lap joints for tension reinforcement Structural Concrete 1/2014 45-54 Technical Papers

Kurzfassung

Staggering lapped joints increases the complexity of detailing and steel fixing, and may require additional resources and slow construction on site. Major design codes encourage staggering lapped joints in tension by imposing a penalty on lap length depending on the proportion of bars lapped at the same section. There are, however, inconsistencies in the value of the coefficients to be applied, and little evidence is available for validation. A programme of 17 physical tests found no evidence of an increase in strength when laps were staggered, and when allowance is made for increases in transverse spacing, staggering was found to reduce lap strength. Differences in the distribution of bond stress through a lap joint and in the share of the tension force taken by continuous and lapped bars are demonstrated to be responsible for the reduction.

x
Magnusson, Johan; Hallgren, Mikael; Ansell, Anders Shear in concrete structures subjected to dynamic loads Structural Concrete 1/2014 55-65 Technical Papers

Kurzfassung

Shear failures in reinforced concrete structures under intense dynamic loads are brittle and limit the structure's energy-absorbing capabilities. This paper comprises a review of the literature dealing with the problem of dynamic shear of reinforced concrete elements, with a focus on parameters that control flexural shear and direct shear. In this context, dynamic loads refer to intense events due to explosions and impacts. For this reason, the initial response is also highlighted. Experimental investigations and calculations show that shear force and bending moment distributions in dynamic events are initially significantly different from the distributions under slowly applied loads. Therefore, structural wave propagation, geometrical properties of elements, strain rate effects and dynamic load characteristics need to be considered when analysing shear. The review also indicates that arch action in the shear span soon after the load has been applied has a large influence on the shear capacity of an element. This action is of particular importance in intense loading events. Finally, suggestions for further research are identified.

x
Liu, Xian; Jiang, Wei; De Schutter, Geert; Yuan, Yong; Su, Quanke Early-age behaviour of precast concrete immersed tunnel based on degree of hydration concept Structural Concrete 1/2014 66-80 Technical Papers

Kurzfassung

Using the Hong Kong-Zhuhai-Macao Link project as an example, the focus of this research is to describe the early-age behaviour of a precast immersed tunnel using a constitutive model based on the degree of hydration concept. In this way, the effect of both age and temperature on the early-age behaviour can be taken into account simultaneously. Special attention is also paid to early-age creep under varying stress levels combined with the degree of hydration concept. Numerical procedures are proposed to predict the early-age behaviour of immersed tunnel segments during the entire fabrication process. The engineering factors related to early-age cracking are analysed and discussed. This in-depth study results in a better understanding, and further appropriate practical measures can be employed to control early-age cracking in the actual project.

x
Aboutalebi, Morteza; Alani, Amir M.; Rizzuto, Joseph; Beckett, Derrick Structural behaviour and deformation patterns in loaded plain concrete ground-supported slabs Structural Concrete 1/2014 81-93 Technical Papers

Kurzfassung

The work presented in this paper is considered to be an attempt to contribute towards a better understanding of the structural behaviour of plain concrete slabs under step loading conditions. The Concrete Society Technical Report TR34 “Concrete Industrial Ground Floors” is in its 3rd edition (2003) and is currently under review. TR34 covers the design of concrete ground-supported slabs containing fibres, both steel and synthetic, as an alternative to mesh reinforcement. This work reports on tests carried out at different critical loading locations, including the centre, edges and corners of a 6.0 × 6.0 × 0.15 m deep plain concrete slab. The test results are compared with theoretical values derived using available design codes and other information sources. The results show a notable difference between the test results and the theoretical values.

x
Abbas, Ali A.; Mohsin, Sharifah M. Syed; Cotsovos, Demetrios M. Non-linear analysis of statically indeterminate SFRC columns Structural Concrete 1/2014 94-105 Technical Papers

Kurzfassung

The structural behaviour of steel fibre-reinforced concrete (SFRC) has been studied using non-linear finite element analysis (NLFEA) and ABAQUS software. An interesting feature of this work is the consideration of statically indeterminate SFRC columns. Most of the SFRC specimens studied in the literature are simply supported beams, and information on statically indeterminate columns is sparse. In addition, both axial and lateral loads were considered in order to allow for compression and flexural effects on the columns. The aim of the work was to examine the potential for using steel fibres to reduce the amount of conventional transverse steel reinforcement without compromising ductility and strength requirements. To achieve this, the spacing between shear links was increased while steel fibres were added as a substitute (spacing between shear links increased by 50 and 100 % with fibre volume fraction Vf increased to Vf = 1, 1.5, 2 and 2.5 %). The numerical model was carefully calibrated against existing experimental data to ensure the reliability of its predictions. Parametric studies were subsequently carried out, which provided insight into how the steel fibres can help reduce the number of conventional shear links.

x
fib-news: Structural Concrete 1/2014 Structural Concrete 1/2014 106-113 fib-news

Kurzfassung

2014 fib Congress, Mumbai; 2014 Freyssinet Medals; ConLife and 70th anniversary of NIISK ; fibUK seminar report; 20th anniversary of CBS; Report from the Spanish NMG; 2015 fib Symposium; fib Bulletins; Congresses and symposia.

x
Contents: UnternehmerBrief Bauwirtschaft 1/2014 UnternehmerBrief Bauwirtschaft 1/2014 Contents

Kurzfassung

Keine Kurzfassung verfügbar.

x
Jahresinhaltsverzeichnis 2013 UnternehmerBrief Bauwirtschaft 1/2014 1-7 Jahresinhaltsverzeichnis

Kurzfassung

Keine Kurzfassung verfügbar.

x
Noss, Friedhelm UBB, BVMB und DVLV - eine starke Verbindung UnternehmerBrief Bauwirtschaft 1/2014 1 Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

x