Sonderlösungen bei der Tragwerksplanung auf der Grundlage der neuen Normen – Klimatische Einwirkungen

Special solutions in structural design on the basis of the new design codes – climatic actions. The following contribution deals with climatic actions on large lightweight roofs of stadia. The focus is on the wind loads. In some cases, it becomes necessary or advantageous to provide more precise design wind loads compared to the code provisions. This applies to the local wind climate as well as to the aerodynamic coefficients. The framework for such investigations is established by the requirements set by the code DIN 1055‐100: Basis of design, with regard to structural safety and reliability, and by those basic stipulations in the wind loading code which may not be altered. The author presents and discusses the framework for optimised design wind loads.     

Silolasten nach der neuen DIN 1055‐6

Silo loads according to the new DIN 1055‐6 An overview and some background information are given to the new DIN 1055‐6 “Actions on Structures: Actions on Silos and Tanks”. Following the rules of EN 1991‐4 the determination of silo loads is adjusted to the new safety philosophy of DIN 1055‐100. In some cases new load rules have been introduced or existing rules have been replaced. In particular this concerns patch loads for thin‐walled steel silos, loads in squat and intermediate standard silos, hopper loads or loads for large eccentricity of discharge.     

Erfahrungen mit der neuen DIN 1055‐4 im Stahlschornsteinbau

Experiences with the new DIN 1055‐4 in Steel‐Chimney Building. This report summarizes the first experiences of the author with the new wind standard DIN 1055‐4 in the steel chimney building. It compares the calculation of gust wind profiles according to DIN 1055‐4 with those of the current valid standard for steel chimneys DIN 4133 Annex A. Additionally suggestions are made, that could give simplifications to the practictioner in the use of this standard.     

Die neue Schneelastnorm DIN 1055‐5, kritisch hinterfragt

Die neue Schneelastnorm DIN 1055‐5:7/2005 brachte vor allem in den höhergelegenen Orten der Zone 3 erhebliche Erhöhungen der Schneelast, die bis zum Zweifachen der bisher anzusetzenden Belastung reicht. Auch die neuen Formeln für die Belastung von aneinandergereihten Dächern, von Shed‐ und Tonnendächern sowie die Behandlung von Höhensprüngen und Trauflasten erscheint problematisch. In diesem Beitrag wird versucht, Unstimmigkeiten der Norm aufzuzeigen. The current snow load standard DIN 1055‐5 – a critical review. The current snow load standard DIN 1055‐5:7/2005 caused a considerable increase of snow load, particularly in more elevated areas located in zone 3. It doubles the amount of snow load capacity – compared to the old standard. The new equations for calculating snow loads for adjacent roofs, shed roofs and arched roofs as well as the handling differences in altitude and gutter load seems problematic. This paper tries to show the inconsistencies of current standard.     

Hinweise und Erläuterungen zur Anwendung der neuen Windlastnorm DIN 1055‐4:2005‐03

Notes and Comments on the Application of the New Wind Loading Standard DIN 1055‐4.2005‐03 The final draft of the German Wind loading code DIN 1055‐4 has been published in March 2005. It is scheduled for implementation as a design rule in 2007. The code is basically new in several aspects: the development of a new wind map, the introduction of two wind profiles accounting for changes of surface roughness and the application of the gust response factor to determine equivalent static wind loads for structures and structural elements prone to wind induced vibration. The development of the DIN 1055‐4 has been harmonized during the final drafting process with the Eurocode Draft prEN 1991‐1‐4.6:2002: Actions on Structures – Wind Actions. The following contribution presents a survey of the main features and illustrates the application referring to some typical cases.