Das Tragverhalten von Glasstützen mit Mono- und Verbundquerschnitten

  • The structural behaviour of glass columns with monolithic and laminated sections

Langosch, Katharina; Feldmann, Markus (Thesis advisor)

Aachen : Shaker (2013)
Dissertation / PhD Thesis

In: Schriftenreihe des Lehrstuhls für Stahlbau und Leichtmetallbau der RWTH Aachen 75
Page(s)/Article-Nr.: VII, 226, LXIV S. : Ill., graph. Darst.

Zugl.: Aachen, Techn. Hochsch., Diss., 2012

Abstract

Columns have a supporting function. If there are additional requirements such as transparency of building materials, components of glass are used. In load-bearing members mainly glasses with laminated cross sections and viscoelastic interlayer (especially PVB) are used. These glass columns under axial compressive loads and possible horizontal shear loads are dimensioned against stability failure taking into account material specific properties of the glass and the interlayer. Normative rules for this are still lacking. This work is devoted developing of an appropriate analytical design method for the stability case buckling of monolithic and laminated glass columns. The basis of the design concept has already been established in the structural steel design calculation using European buckling curves as a function of non-dimensional slenderness. Considering the special features of glass (elastic structural behavior, high ratio of characteristic compressive strength to characteristic flexural strength) for thermally tempered monolithic glass columns structural design calculation are developed for concentric and eccentric compression loads and verified by experimental and numerical investigations. In addition, stability analysis for centric compressive loads in combination with bending are presented for selected load cases. The derivation of partial safety factors completes the design methods. Moreover the design method is extended to glass columns with laminated cross sections. For this purpose the temperature- and time-dependent composite action is considered by use of any shear modulus of the interlayer in the second-order stress equation and the analytically derived buckling curves. For combined loads of different duration, design equations are available taking into account both the combination of axial long-term and axial short-term pressure loads as well as the combination of axial long-term compressive and short-term vertical shear loads by using different shear moduli.

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