共查询到20条相似文献，搜索用时 20 毫秒
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Tilo Proske Moien Rezvani Stefan Hainer Carl‐Alexander Graubner 《Beton- und Stahlbetonbau》2014,109(10):726-741
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Frank Fingerloos 《Beton- und Stahlbetonbau》2010,105(6):342-348
Der neue Eurocode 2: “Bemessung und Konstruktion von Stahlbeton‐ und Spannbetontragwerken – Teil 1‐1: Allgemeine Bemessungsregeln und Regeln für den Hochbau” (EC2‐1‐1) mit seinem Nationalen Anhang ist nach einer ausführlichen Erprobungsphase bereit zur bauaufsichtlichen Einführung in Deutschland. In mehreren Beiträgen sollen Erläuterungen und Hintergründe zu einigen Regelungen im Eurocode 2 und zu den Entscheidungen für Regeln im Nationalen Anhang vorgestellt werden, die entweder zu Änderungen gegenüber DIN 1045‐1 oder zu Abweichungen vom Eurocode 2 führten. Der Teil 1 gibt zunächst eine Übersicht über die maßgeblichen europäischen Normen und führt in den Nationalen Anhang ein. The Eurocode 2 for Germany – Explanations and Backgrounds. Part 1: Introduction in the National Annex The new Eurocode 2 “Design of concrete structures – Part 1‐1: General rules and rules for buildings” (EC2‐1‐1) and its National Annex has undergone a phase of detailed testing and is now ready for the implementation in Germany. In some articles should be given explanations and backgrounds of some rules in Eurocode 2 and of decisions for rules in the National Annex, which have been taken either to changes compared with DIN 1045‐1 or to differences to Eurocode 2. Article 1 gives an overview about the important European standards and introduces in the National Annex. 相似文献
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Christoph Müller 《Beton- und Stahlbetonbau》2009,104(2):105-112
Cements with Several Main Constituents in Concrete Construction – Sustainable Solutions for Building with Concrete In view of the reduction of climate‐related CO2 emissions in the cement industry the manufacture of cements with several main constituents is of particular significance. One reason is the production process, which is more energy‐efficient and more ecological compared to “traditional” CEM I‐cements (Portland cements). But also the durability and performance in their use in concrete constructions are reasons why Portland‐composite cements (CEM II) and blastfurnace cements (CEM III) have meanwhile reached a market share of about 65% in Germany. For a few years now, approximately only 30% Portland cements have been used throughout Europe – with a continuous downward trend. The application‐specific properties, the possible areas of use as well as the ecologic advantages of the cements with several main constituents used in Germany so far are described in the following and illustrated by two practical examples. An outlook into possible further developments is given by examples of the performance of new cements in concrete. 相似文献
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The Bearing Capacity of Single Columns according to Eurocode 2 with Regard to the Method based on Nominal Stiffness Within the context of European harmonization the general rules and execution for concrete constructions are documented in Eurocode 2. The calculation of structures with axial loads can be made either based on approximation procedures or based on the general method of non‐linear 2nd order analysis. A set of calculations of isolated members will demonstrate the influence of the material, of the slenderness and of the eccentricity of the axial force. The results are compared with one another in a critical discussion. 相似文献
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Strut‐and‐Tie Models and Concentrated Loading according to DIN 1045‐1 and Eurocode 2 – Modelling and Application Strut‐and‐tie models are efficient tools for the demonstration of load‐bearing characteristics and for the design of reinforced and prestressed concrete structures. The illustration and determination of so called D‐regions is one of the most common areas of application. Another related problem is concentrated loading. In comparison to bending or shear design, the standards DIN 1045‐1 and Eurocode 2 (DIN EN 1992‐1‐1) provide only limited requirements and information for application of strut‐and‐tie models and concentrated loading problems. In praxis, the Engineer has to find possible solutions on basis of the principles given in the standards. The following paper compares the basic information of DIN 1045‐1 and Eurocodes 2 (DIN EN 1992‐1‐1) concerning strut‐and‐tie‐models and concentrated loading problems and gives additional proposals for certain application issues. 相似文献
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Thomas Braml Manfred Keuser Alexander Fischer Jürgen Schnell 《Beton- und Stahlbetonbau》2009,104(12):798-812
Probabilistische Berechnungsverfahren gewinnen im Bauingenieurwesen immer mehr an Bedeutung. Die Probabilistik wird sowohl zur Kalibrierung von Teilsicherheitsbeiwerten des semiprobabilistischen Sicherheitskonzepts der aktuellen Normengeneration als auch im Rahmen von Tragfähigkeitsbewertungen bestehender Bauten eingesetzt. Für biegebeanspruchte Stahlbetonbauteile kann die Grenzzustandsfunktion für Tragwerksversagen aufgrund eines klaren mechanischen Tragmodells eindeutig angegeben werden. Im Gegensatz hierzu gibt es bei der Formulierung des mechanischen Modells des Querkraftabtrags bisher noch große Unsicherheiten. Der nachfolgende Beitrag beschäftigt sich mit der Zuverlässigkeit von querkraftbeanspruchten Bauteilen im Hochbau und soll als Hilfestellung zur Wahl geeigneter statistischer Kenngrößen der Modellunsicherheiten für probabilistische Berechnungen verstanden werden. Die vorgeschlagenen Kenngrößen wurden aus umfangreichen Parameterstudien im Hinblick auf das Zielzuverlässigkeitsniveau gewählt. Reliability Assessment of Existing Structures subjected to Shear Force Probabilistic analyses are becoming more and more important in civil engineering. Probabilistics can be used for the calibration of partial safety factors of the semi probabilistic safety concept of current codes as well as in the context of sustainability evaluations of existing buildings. For reinforced concrete components subjected to bending, the limit state function for structural failure can be specified clearly because of a well‐defined mechanical model. By contrast, for the formulation of the mechanical model of shear carrying capacity there are still large uncertainties. The following article deals with the reliability of components in building structures subjected to shear force and should be understood as a support selecting appropriate statistical parameters of model uncertainties for probabilistic calculations. The proposed statistic parameters of model uncertainties were selected out of extensive parameter studies in view of the target reliability level. 相似文献
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Wolfgang Finckh Anett Ignatiadis Roland Niedermeier Udo Wiens Konrad Zilch 《Beton- und Stahlbetonbau》2012,107(10):711-715
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Dr.-Ing. Maria Teresa Alonso Junghanns Prof. Dr.-Ing. Rolf Breitenbücher Michael Günther Dipl.-Ing. Prof. Dr.-Ing. Michael Haist Jörg Haus Dipl.-Ing. 《Beton- und Stahlbetonbau》2023,118(3):192-200
Concrete basins according to ZTV-ING Concrete retention basins within the German federal highways network are regulated in ZTV-ING. Taking into account the current state of the art and the experiences of the road administration with regard to the construction and operation of such basins and pump houses, a new assignment of the exposure classes for these components should be appropriate. This article takes a differentiated view on the relevant environmental impacts of concrete basins and explains the background for possible modifications to be made in a new ZTV-ING. For example, in case of a global categorization, many components would have to be formally assigned to the exposure class XF4, from which the mandatory use of air-entrained concrete would then be directly derived. However, differentiated considerations, considering specific boundary conditions and many years of experience, also allow the use of concretes without air entraining agents. 相似文献
