||Glued Connection in Plate Shell Glass Structure
||Hansen, Jens Zangenberg (Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Hede Poulsen, Stinne
||Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
||This thesis investigates a glued connection detail for use in a plate shell structure of glass.
The connection detail consists of an aluminium profile which by use of glue connects the
individual plates. The thesis examines and verifies, both experimentally and numerically,
the behavior of the connection for short term as well as long term loads. There is distinguished
between two overall levels investigated in parallel. This is done with respect to
both material and structural properties.
The experimental part, in relation to thematerial properties, identifies characteristic properties
of the adhesive for short- and long-term loads. The investigations are based on
uniaxial tension tests, as well as shear lap joints from which the elastic material parameters
and ultimate strengths are determined. Furthermore, the influence of load rate and
curing time is examined. A number of long term tests identify the creep behavior. These
material tests show that the adhesive is a complex non-linear viscoelastic material with
properties dependent on temperature, load rate and curing time.
Along with the material tests, the behavior of the connection is examined with respect
to bending and in-plane shear forces at realistic load levels. Based on a linear relation
between load and deformation, the stiffness related to the individual load cases are given.
Creep tests verifies the long term resistance of the connection.
The structural tests show a linear behavior for the investigated short term loads, without
any risk of failure. The time dependent tests reveal an increasing creep behavior, however,
with a stagnation in relation to bending action.
In order to verify the material tests, a number of Finite Element (FE) models are established.
Through an iterative process, between the FE-models and the tests, the final material
parameters of the adhesive are identified, both in relation to short- and long-term
loads. The material parameters are implemented in two FE-models replicating the structural
tests, which enables a numerical determination of the connection stiffness.
By use of the structural FE-models, a parameter study of the connection is made. The
study makes it possible to predict the stiffness, related to bending and in-plane shear, on
the basis of specific geometries in a preliminary design situation of the connection. The
project shows promising potential for the use of the connection detail in the plate shell
||Technical University of Denmark (DTU) : Lyngby (DK)
Creation date: 2011-01-24
Update date: 2011-12-21