Artikeldatenbank
Autor(en) | Titel | Zeitschrift | Ausgabe | Seite | Rubrik |
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Ruopp, Jakob; Kuhlmann, Ulrike | Steel-to-concrete joints with large anchor plates under shear loading | Steel Construction | 2/2017 | 115-124 | Articles |
KurzfassungIn industry and plant engineering especially, high flexibility is required at joints between steel and concrete. According to current standards, the maximum number of fasteners is limited to an arrangement of 3 × 3 anchors on an anchor plate. The load-carrying behaviour of large anchor plates under tension, shear and restraining forces was investigated within the scope of the research project “Large Anchor Plates with Headed Studs for Highly Stressed Constructions in Industry and Plant Engineering”. This paper describes the research results obtained at the University of Stuttgart for large anchor plates under shear loading. Findings for large anchor plates under tension and restraining forces are given in [20], which were mainly investigated at the University of Kaiserslautern. x | |||||
Lam, Dennis; Dai, Xianghe; Ashour, Ashraf; Rehman, Naveed | Recent research on composite beams with demountable shear connectors | Steel Construction | 2/2017 | 125-134 | Articles |
KurzfassungThis paper presents the experimental and numerical investigations of an innovative composite floor system with deconstructability. In this system, a composite slab formed with metal profiled decking is connected to a steel beam using demountable shear connectors. A series of push tests was conducted to investigate the behaviour of this form of shear connector. In addition to the push tests, a full-scale composite beam was tested to failure in the laboratory under a number of cycles of monotonic loading. For direct comparison, a similar composite beam test was conducted using the same section size and concrete strength, but using conventional welded headed stud connectors. Test results showed that the behaviour of the composite beam with demountable shear connectors is comparable with that of the specimen with welded shear connectors. After the test was terminated, the demountable shear connectors were unfastened and the composite floor could be easily lifted off from the steel beam. Test results showed that these demountable shear connectors possess high ductility in comparison to the equivalent welded shear connectors. Simple design rules currently use in Eurocode 4 for welded shear connections and Eurocode 3 for bolts are proposed to predict the shear resistance of this form of demountable shear connector. x | |||||
Pavlovi , Marko; Veljkovi , Milan | FE validation of push-out tests - Using bolts as shear connectors | Steel Construction | 2/2017 | 135-144 | Articles |
KurzfassungThe prefabrication of concrete slabs reduces construction time and the total life cycle cost of composite steel-concrete buildings and bridge decks. Using bolts as shear connectors embedded in prefabricated concrete slabs enables reuse and easy replacement of slabs as structural members suitable for a circular economy construction concept. The results of static push-out experiments on M16 and M24 bolts, grade 8.8, are shown here. The focus is on the validation of advanced finite element (FE) modelling by experiments. Damage material models for bolt and concrete slab were used and the most realistic preloading of the bolts modelled with threads was achieved by turning the nut in the FE model. An explicit dynamic solver with mass scaling function was used for quasi-static analysis including fracture. Two failure modes obtained in experiments - bolt shear and concrete crushing - were realistically modelled by the FEA, which shows that the model is suitable for a parametric study leading to theoretical models of failure modes and slip capacity of the shear connection. Results indicate that the bolts with nuts on both sides of the steel flange can be successfully used as demountable shear connectors. x | |||||
Spremic, Milan; Markovic, Zlatko; Veljkovic, Milan | Recommendations for the design of grouped headed studs | Steel Construction | 2/2017 | 145-153 | Articles |
KurzfassungGrouped headed studs may be successfully utilized to achieve the longitudinal shear connection between prefabricated slabs and steel beams. The behaviour of the studs and the ultimate resistance of the group were analysed using the results of experimental push tests and by employing advanced FE analyses. Different arrangements of studs in the group were investigated, focusing on minimal distance between the studs. It is demonstrated that the full shear resistance of a group of headed studs is achieved even when the distances between the studs are less than the minimum requirement according to EN 1994-1-1. Concrete class C30/37 is the minimum that should be used. Furthermore, the paper presents a new model for calculating the shear resistance of grouped headed studs. The proposed design model is based on an equivalent stud diameter and can be used for various arrangements of headed studs in a group. The shear resistance formula and the requirements for ductility are consistent with the existing Eurocodes. Fatigue loading is not considered in this paper, so the proposed recommendations are valid for buildings including multi-storey car parks. x | |||||
Lorenc, Wojciech | The model for a general composite section resulting from the introduction of composite dowels | Steel Construction | 2/2017 | 154-167 | Articles |
KurzfassungA new form of shear connection, so-called composite dowels, first appeared in Europe in last decade. It enabled economic construction of steel-concrete composite bridges without an upper steel flange, using a direct connection between steel web and concrete slab. It finally resulted in new economic structural forms and composite sections that had not been used in bridge engineering before. In 2010 the European Commission launched an international project to build three different innovative bridges in three different European countries (Germany, Poland, Romania). Each bridge project was supported by a national consortium consisting of design office, general contractor and university. This economic technology has developed fast: by the end of 2016, at least 34 bridges using composite dowels had been constructed in Europe (13 in Germany, 11 in Poland, 4 in Czech Republic, 4 in Austria, 2 in Romania). These structures use different kinds of composite section that in many cases are not covered by standard design procedures for composite structures. The need for a consistent design method was evident. This leads to a clear design concept that covers the contribution of concrete slabs in transmitting part of the vertical force in composite sections and finally breaks with the concept of a “steel skeleton” constituting the fundamental part of the composite beam. The approach proposed here needs to be as simple and clear as possible, so it assumes some simplifications at this stage. It is intended to cover many types of composite section, externally reinforced section and conventional composite section. x | |||||
Lawson, R. Mark; Hanus, Francois; Sonck, Delphine | Large web openings in steel and composite beams | Steel Construction | 2/2017 | 168-175 | Articles |
KurzfassungThis paper presents the basis for the design of steel and composite beams with large web openings. The main design requirements are the transfer of shear by Vierendeel bending and the control of web buckling next to and between the openings. Cellular beams with regular circular openings are a common example of highly perforated beams and their flange areas are often highly asymmetric. For these beams, web-post moments may be generated to develop the full shear resistance of the cross-section. x | |||||
Schiborr, Markus; Stranghöner, Natalie | Application of direct tension indicators in preloaded bolted connections | Steel Construction | 2/2017 | 176-188 | Articles |
KurzfassungThe direct tension indicator (DTI) method is specified in EN 1090-2 as one of the tightening procedures for preloading bolting assemblies to a specified level of preload. As Germany so far has no experience of using the DTI method, recent experimental and theoretical investigations were carried at the Institute for Metal and Lightweight Structures, University of Duisburg-Essen, Germany, with the main focus being the loadbearing behaviour of preloaded bolting assemblies with DTIs under external axial tensile loading. Whereas tension connections employing preloaded bolting assemblies are quite common in Germany, in the UK, for example, bolted connections are preferably designed as shear connections, as far as is known. As a result of the investigations presented below, it can be summarized that, under tensile loading especially, preloaded bolting assemblies with DTIs might suffer from a severe loss of preload - something that should be considered in preloaded bolted connections in which the preload is taken into account in the design of the connections, e.g. in slip-resistant connections, to activate the slip resistance, and in tension connections subjected to fatigue. Based on these investigations, recommendations have been formulated for preloaded bolting assemblies with DTIs under external axial tensile loading. x | |||||
Akkermann, Jan; Halaczek, Bartlomiej; Vieth, Heinz-Josef | Kienlesberg Bridge in Ulm, Germany - The structural conception of a steel landmark in the context of a design tradition | Steel Construction | 2/2017 | 189-195 | Articles |
KurzfassungKienlesberg Bridge is the new link for trams, pedestrians and cyclists between the inner city and the science centre in the north-west of Ulm. The bridge crosses a railway junction near the main station and a new high-speed rail link. The geometric boundary conditions lead to unequal spans and complex alignments. Therefore, the scheme that won the design competition, which is now under construction, proposed a bridge made of steel. The superstructure was designed as a semi-integral continuous beam with main girders of varying depth. Owing to the pedestrian and cyclists' path on one side, the orthotropic plate cross-section is asymmetric and the main girders have varying depths. Special calculations and details were necessary for dynamic and noise control reasons. The bridge is being built using incremental launching. x | |||||
ECCS news: Steel Construction 2/2017 | Steel Construction | 2/2017 | 196-198 | ECCS news | |
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Content: Steel Construction 1/2017 | Steel Construction | 1/2017 | Contents | ||
Annual table of contents 2016 | Steel Construction | 1/2017 | Annual table of contents | ||
Rutner, Marcus P. | Editorial: Steel Construction 1/2017 | Steel Construction | 1/2017 | 1 | Editorials |
Yanagisawa, Norifumi; Imagawa, Yusuke; Ohyama, Osamu; Rutner, Marcus; Kurita, Akimitsu | Fire safety of bridges - methodology supporting design and forensic evaluation | Steel Construction | 1/2017 | 2-9 | Articles |
KurzfassungDedicated to Prof. Dr. Eng. Akimitsu Kurita on his 70th birthday, in honour of his scientific achievements, guidance and the education of his students. x | |||||
Lindner, J.; Kuhlmann, U.; Just, A.: Verification of flexural buckling according to Eurocode 3 part 1-1 using bow imperfections. | Steel Construction | 1/2017 | 9 | Erratum | |
Hanswille, Gerhard; Bergmann, Reinhard; Bergmann, Marco | Design of composite columns with cross-sections not covered by Eurocode 4 | Steel Construction | 1/2017 | 10-16 | Articles |
KurzfassungDedicated to Prof. Dr. Akimitsu Kurita on his 70th birthday x | |||||
Mensinger, Martin; Huang, Li | Dedicated to Prof. Dr. Akimitsu Kurita on his 70th birthday Optimized preliminary structural design of steel composite buildings using the Sustainable Office Designer - Comparing optimizations to satisfy different objectives | Steel Construction | 1/2017 | 17-22 | Articles |
KurzfassungPreliminary structural design is used for estimating and comparing design alternatives. It is mainly a manual procedure based on experience and documented in the form of design tables or charts. In an effort to automate this procedure for steel composite office buildings, the Sustainable Office Designer (SOD) has been developed as a SketchUp plug-in. It can generate optimized preliminary structural designs for given rectangular boundary shapes and employs a rapid approximate calculation instead of an expensive structural analysis. Steel columns are used and verified according to DIN EN 1993-1-1, while beams are designed as composite members and verified to DIN EN 1994-1-1. Pre-calculated design tables are used for slab systems. Optimization results are obtained and compared for different objectives, e.g. life cycle assessments (LCA) and costs. x | |||||
Pak, Daniel; Bigelow, Hetty; Feldmann, Markus | Design of composite bridges with integral abutments | Steel Construction | 1/2017 | 23-30 | Articles |
KurzfassungDedicated to Prof. Dr. Akimitsu Kurita on his 70th birthday x | |||||
Golchinfar, Behnoush; Donskoy, Dimitri; Pavlov, Julius; Rutner, Marcus | Remote monitoring of structural health in composites | Steel Construction | 1/2017 | 31-36 | Articles |
KurzfassungDedicated to Prof. Dr. Eng. Akimitsu Kurita on his 70th birthday, in honour of his scientific achievements, guidance and the education of his students. x | |||||
Zhang, Wei; Wu, Mengxue; Zhu, Jin | Evaluation of vehicular dynamic effects for the life cycle fatigue design of short-span bridges | Steel Construction | 1/2017 | 37-46 | Articles |
KurzfassungDedicated to Prof. Dr. Akimitsu Kurita on his 70th birthday x | |||||
Li, Xi; Glisic, Branko | Evaluating early-age shrinkage effects in steelconcrete composite beam-like structures | Steel Construction | 1/2017 | 47-53 | Articles |
KurzfassungDedicated to Prof. Dr. Akimitsu Kurita on his 70th birthday x | |||||
Mangerig, Ingbert; Kroyer, Robert; Koller, Matthias | Experimental and numerical analyses of the effectiveness of high-frequency peening processes | Steel Construction | 1/2017 | 54-66 | Articles |
KurzfassungDedicated to Prof. Dr. Akimitsu Kurita on his 70th birthday x | |||||
Wardenier, Jaap; de Vries, Peter; Timmerman, Gerrit | Evaluation of cracks in an offshore crane runway girder | Steel Construction | 1/2017 | 67-71 | Articles |
KurzfassungThis paper deals with the evaluation of fatigue cracks in a box type radial crane runway girder with full penetration welds between the web and flange. After 20 years of service fatigue cracks were observed which were initiated in the flange at the toe of the full penetration weld with the web. The observed cracks in the crane runway girder vary in length from a few mm to 330 mm with a summation of the lengths of all observed cracks being 750 mm, on a total length of 56000 mm, thus being only 1.3 %. x | |||||
Hauptenbuchner, Johannes | Design and construction of the complex steel structure for the Amager Bakke waste-to-energy plant | Steel Construction | 1/2017 | 72-79 | Reports |
KurzfassungAmager Bakke (English: Amager slope) is the name of Copenhagen's new waste-to-energy-plant located on the Amager peninsula. Once finished, it will be one of the largest incinerators in northern Europe and will be used for the combined production of district heat and electricity. On top of the waste-to-energy plant there will be a landscaped park featuring artificial ski slopes and a viewing platform. The support structure is mainly formed by a steelwork. The model-based design and construction of the complex, three-dimensional steel structure proved to be a challenging task for all the engineers and companies involved. x | |||||
Announcements: Steel Construction 1/2017 | Steel Construction | 1/2017 | 79 | Announcements | |
KurzfassungInternational Conference on Architecture and Civil Engineering 2017 x | |||||
Rutner, Marcus; Kurita, Akimitsu | Professor Gert Albrecht dies at 75 | Steel Construction | 1/2017 | 80 | People |