Artikeldatenbank
Autor(en) | Titel | Zeitschrift | Ausgabe | Seite | Rubrik |
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Tsubomoto, Masahiko; Kawatani, Mitsuo; Mori, Kengo | Traffic-induced vibration analysis of a steel girder bridge compared with a concrete bridge | Steel Construction | 1/2015 | 9-14 | Articles |
KurzfassungAt the preliminary design stage for a highway bridge 81 m long, a three-span continuous girder, including a span of about 30 m, is preferable from the point of construction cost. Generally, the concern is that girder bridges with spans of 30 m, which have a fundamental natural frequency of about 3 Hz, have large traffic-induced vibrations due to the coupling dynamic response with heavy vehicles having a bouncing natural frequency of about 3 Hz. Furthermore, large traffic-induced vibration in girder bridges causes low-frequency sound (LFS) as one of the environmental vibration problems. Two kinds of girder bridge with a length of 81 m - a concrete hollow slab bridge and an eight-girder steel bridge with the same spans - are proposed. For assessing the low-frequency sound radiated from bridges, firstly, the traffic-induced vibrations of two kinds of girder bridge are compared with each other by analysing the coupling dynamic response of bridges due to moving heavy vehicles in a dynamic system. x | |||||
Elbe Bridge at Schönebeck wins Structural Award 2014 in the category "Highway or Railway Bridge Structures" | Steel Construction | 1/2015 | 14 | News | |
Hashimoto, Kunitaro; Kayano, Makio; Suzuki, Yasuo; Sugiura, Kunitomo; Watanabe, Eiichi | Structural safety assessment of continuous girder bridge with fatigue crack in web plate | Steel Construction | 1/2015 | 15-20 | Articles |
KurzfassungThis paper, which focuses on a fatigue crack found in a main girder of a continuous steel girder bridge, assesses the remaining structural safety of the steel bridge with such a fatigue crack in order to judge whether or not urgent action such as closure to traffic or necessary temporary repairs and strengthening should be carried out. Therefore, an elastic-plastic finite displacement analysis is carried out for the continuous three-span non-composite steel girder bridge with four main girders in which a fatigue crack about 1.1 m long in the web plate of the main girder was discovered during an inspection. From the analysis results it is found that the load redistribution function of the multiple main girder system was effective and the remaining load-carrying capacity of such a bridge system is such that there will be no sudden collapse of the entire bridge. x | |||||
Kennedy, Stephen J.; Martino, Aldo E. | SPS bridge decks for new bridges and strengthening of existing bridge decks | Steel Construction | 1/2015 | 21-27 | Articles |
KurzfassungThe sandwich plate system (SPS) is a structural composite material made up of two metal plates bonded to a polyurethane elastomer core. SPS delivers high strength and stiffness, making it an excellent alternative to conventional stiffened steel and reinforced concrete. For strengthening of orthotropic bridge decks, SPS Overlay can be used to create a stiff bridge deck without removing the original plates. The renewed deck improves the distribution of wheel loads across the longitudinal stiffening elements, decreases deck curvatures associated with large concentrated wheel loads, extends the fatigue life of fatigue-critical welds and increases the life of the wearing surface and the whole bridge. For new bridge applications, prefabricated SPS bridge deck plates reduce the dead load by up to 70 % compared with concrete bridge decks, thus allowing bridges to carry significantly greater live load without the need for girder or pier strengthening. Deck replacement can be completed while leaving the steel or concrete girders in place or, where speed of erection is critical, pre-assembled longitudinal deck-girder units can be used. x | |||||
Lener, Gerhard | Steel bridges - numerical simulation of total service life including fracture mechanic concepts | Steel Construction | 1/2015 | 28-32 | Articles |
KurzfassungThe assessment of the total service life of a steel structure should gain importance in the near future due to the increasing significance of building preservation and building modernization. The main cause of the failure of existing structural steelwork under cyclic loading effects is material fatigue. Most steel structures are, however, failure-tolerant. For economic reasons, this behaviour can be considered by including the crack propagation phase in the assessment. This contribution presents newly developed software tools and the results of some simulations of the total lifetimes of existing structures. x | |||||
Mano, Toshihisa; Mangerig, Ingbert | Tensile load-carrying behaviour of elastomeric bearings | Steel Construction | 1/2015 | 33-41 | Articles |
KurzfassungElastomeric bearings for seismic isolation applications can be subjected to tensile loads depending on the geometrical configuration, high vertical seismic motion or excessive horizontal deformation due to the elongated-period horizontal motion. It is a known fact that cavities develop within elastomeric material when it undergoes a certain amount of tensile force in a very constrained condition since a high hydrostatic tensile stress builds up. Once these cavities have developed, the tensile stiffness of the bearing drops dramatically. This paper contributes to understanding this phenomenon itself and its influence on the basic properties of elastomeric bearings. For this purpose, two types of elastomeric bearing were tested and the cavitation phenomenon observed. Moreover, those test results are compared with the FE simulation results from the modified hyperelastic material model with the cavity damage criterion. The two-phase softening model presented here can simulate the real softening behaviour of elastomeric bearings well, and it may even help us grasp a better insight into the cavitation phenomenon. x | |||||
Prof. Udo Peil awarded honorary doctorate | Steel Construction | 1/2015 | 41 | People | |
Höglund, Torsten | Cold-formed members - comparison between tests and a unified design method for beam-columns | Steel Construction | 1/2015 | 42-52 | Articles |
KurzfassungIn [1] a unified method for the design of steel beam-columns is presented. The method has been checked for rolled steel beam-columns and extruded aluminium beam-columns. It is included in Eurocode 9 [19] for aluminium members and it is proposed to be included also in Eurocode 3 Part 1-3 [16] as well, but then it needs to be checked for typical cold-formed sections. x | |||||
Enercon wind turbine erected by Liebherr crane | Steel Construction | 1/2015 | 52 | News | |
Bedair, Osama | An analytical expression to determine "realistic" shear buckling stress in cold-formed lipped channels | Steel Construction | 1/2015 | 53-58 | Articles |
KurzfassungCurrent North American and European design provisions ignore the rotational restraint when evaluating local web shear buckling stresses in cold-formed steel channels. This paper offers a new analytical expression for computing local buckling shear stresses in cold-formed channel members taking into account the rotational restraints imposed by the flanges and the lips. The expression derived is suitable for hand calculations and can replace current code expressions in order to achieve economical steel designs. Comparisons with existing design formulas currently used in practice for the limiting conditions show a difference within 5 %. x | |||||
Phänomenta Science Center in Lüdenscheid, Germany | Steel Construction | 1/2015 | 58 | News | |
Nützel, Oswald; Saul, Reiner | Long-term corrosion protection for bridge cables with butyl rubber tapes using the ATIS Cableskin® system | Steel Construction | 1/2015 | 59-64 | Reports |
KurzfassungATIS Cableskin® is a corrosion protection system for bridge cables which uses proven materials to strike out in a new direction. These innovative ideas mean that, for the first time, corrosion protection work on scaffolds and in enclosures will be a thing of the past, and the costs and traffic restrictions are massively reduced. It is worth highlighting the extremely long lifetime of this corrosion protection. x | |||||
Winterstetter, Thomas; Alkan, Mustafa; Berger, Radu; Watanabe, Maiko; Toth, Agatha; Sobek, Werner | Engineering complex geometries - the Heydar Aliyev Centre in Baku | Steel Construction | 1/2015 | 65-71 | Reports |
KurzfassungThe present paper describes the engineering design by Werner Sobek for the new Heydar Aliyev Centre in Baku, a masterpiece of 3D freeform architecture by Zaa Hadid. x | |||||
EUROFER: Chinese steel imports confuse buyers in Europe as Chinese steel producers exploit the export tax regime | Steel Construction | 1/2015 | 71 | News | |
ECCS News: Steel Construction 1/2015 | Steel Construction | 1/2015 | 72-74 | ECCS News | |
Call for entries: European Steel Design Awards 2015 | Steel Construction | 1/2015 | 74-76 | News | |
Announcement: Steel Construction 1/2015 | Steel Construction | 1/2015 | 76 | Announcement | |
ECCS individual membership | Steel Construction | 1/2015 | 76 | News | |
Content: Steel Construction 4/2014 | Steel Construction | 4/2014 | Content | ||
ermelj, Bla; Beg, Darko | Cyclic behaviour of welded stiffened beam-to-column joints - experimental tests | Steel Construction | 4/2014 | 221-229 | Articles |
KurzfassungSixteen cyclic tests on full-strength welded stiffened beam-to-column joints were carried out to study their seismic performance. High-strength steel (HSS) was used for composite columns acting as non-dissipative elastic members and mild carbon steel (MCS) for the beams acting as dissipative members. Two types of welded full-strength connections were studied: rib-stiffened and cover-plate connections. Additional parameters in the study were: different cyclic loadings and the presence of axial force in the column. Experimental results revealed the good behaviour of the joints in terms of relocation of inelastic action away from the face of the beam-to-column connection into the beam section, with correspondingly large ductility, low-cycle fatigue resistance and minimization of damage in the column. x | |||||
Höglund, Torsten | A unified method for the design of steel beam-columns | Steel Construction | 4/2014 | 230-245 | Articles |
KurzfassungIn 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. x | |||||
Call for Contributions | Steel Construction | 4/2014 | 245 | News | |
Kido, Ewa Maria; Cywi ski, Zbigniew | The new steel-glass architecture of air terminals in Japan | Steel Construction | 4/2014 | 246-251 | Report |
KurzfassungSteel-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 | |
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 |
KurzfassungThe 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 |