Trainers: Riccardo La Magna, Philipp Längst, Gregory Quinn
with special support of Julian Lienhard, Daniel Piker and Anna Bauer
HafenCity University Hamburg, Germany – 22-24 September 2017
The workshop will explore and compare 3 different software and simulation approaches in form-finding and analyzing bending-active structures.
In the first half of the Masterclass 3 different numerical approaches for form-finding large deformations in bending-active systems are introduced. For each approach we will give a brief theoretical background to the method and introduce its functionality through a variety of short tutorials. In the second half of the Masterclass we will compare the approaches in the format of a ‘round robin exercise’ to highlight and evaluate similarities, differences, strengths and weaknesses of the individual methods.
The three methods introduced in the Masterclass are
Mesh based – FEM Sofistik
Nurbs based – IGA Carat++
Vector based – DR Kangaroo
All 3 simulation methods use Rhino Grasshopper as an interface. This will facilitate the generating and comparing of input and output geometries for the form-finding process.
Training school EUROMEM
From uncertainties to partial safety factors calibration: application to tensile membrane structures – Discover the birth of a Eurocode
Textile structures are becoming increasingly important in the field of construction, especially for types of construction that are innovative, often sustainable, but also sometimes temporary.
Several European countries have developed design methods and rules that are different. COST Action TU1303 aims to improve the efficiency and sustainability of the future membrane structures. Among its many objectives, European standardization is a major challenge, requiring the potential harmonization and dissemination of complex calculation methods that are required to simulate the specific behavior of textile structures. Working groups WG4: MATERIALS AND ANALYSIS and WG5: FROM MATERIAL TO STRUCTURE AND LIMIT STATES: CODES AND STANDARDIZATION of TU1303 are focusing on this goal. These developments support the activities of CEN TC250 WG5, a European working group with the objective of writing a Eurocode dedicated to membrane structures (expected in 2024). The first milestone is set for mid-2015, with the completion of a Scientific and Policy Report (SAP Report) presenting the state of the art across Europe and proposing the principles for the initial harmonized rules.
The early Eurocodes were essentially based on common practice. The rules developed in the emerging Eurocodes are expected to be derived from more formal reliability analysis-based methods, using statistics describing the materials and loading, and analysis tools focusing on numerical simulation.
Structural reliability analysis is a specialized technique that is essential for Engineers designing membrane structures to the Eurocodes, and for those involved in the development of Standards (including the Eurocode) and research. On completing the Summer School, participants will have a good understanding how to calculate the structural reliability of membrane structures, and be aware of the issues associated with the drafting of a Eurocode for membrane structures.
– Risk analysis and methods of reliability calculation
– Uncertainty modeling (materials, loads).
– Reliability analysis of membrane and pneumatic structures
– Calibration of partial factors.
Tuesday 29th September 2015
14.00-14.30 Overview of the framework (Marijke Mollaert)
14.30-15.30 Philosophy of partial safety factors calibration (Jean-Armand Calgaro)
16.00-18.00 Basis of reliability analysis
16.00-17.00 Risk analysis (Franck Schoefs)
17.00-18.00 Reliability computation (Maurice Lemaire)