COST Action TU1303. WG 5 meeting Denkendorf, 24th March, Marijke Mollaert

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1 meeting Denkendorf, 24 March, 2015 Novel Structural Skins Improving sustainability and efficiency through new structural textile materials and designs WG 5 meeting Denkendorf, 24th March, 2015 Marijke Mollaert, Jean Christophe Thomas Memorandum of Understanding () 1. Exchange research results within WGs by means of published state of the art documents, research reports and seminars 2. Cooperate on common research objectives and further expand the cooperation 3. Ensure complementarities in the performed studies 4. Integrate the investigations, also from the industrial partners, in a multi disciplinary/multi sector European context 5. Increase the frequency of research visits, organise scientific seminars, Short Term Scientific Missions 6. Improve the research output and dissemination 7. Bring research results relevant for industry to market 1. Exchange research results within WGs by means of published state of the art documents In cooperation with CEN/TC 250/ Membrane Structures present Scientific and Policy Report (SaP Report) state of the art overview / background document design rules for membrane structures Draft 10 To be delivered 11th of May Ensure complementarities in the performed studies 3. Integrate the investigations, also from the industrial partners: CEN TC Improve the research output and dissemination The SaP report will contribute to this Analysis and design of membrane structures: Results of a round robin exercise (I) follow up with WG4 Round Robin exercise II: Bi axial testing in preparation with WG4 Round Robin exercise III: Wind launched Considerations/verifications Do partial coefficients have to be applied on the actions or on the effects? Is pre tension an action? Marijke Mollaert 5. Short Term Scientific Missions To be stimulated 1

2 meeting Denkendorf, 24 March, 2015 Task 1 Report on Existing Research: the state of the art = SaP report of CEN/TC 250/ Task 2 Report on Current Research: after 1,5; 2,5 and 3,5 years Wind loading Including summary reports of round robin exercises: input for standardisation Reports on case studies: input for the harmonisation of directives Task 4 Completion of the state of the art guidance/educational pack: will be ready for dissemination at the final Research Conference + version available on the website Task 5 Report about Funding and deadlines for New Research will be presented to the Management Committee after the second and the third year + at least one proposal for a new collaborative research projects idea will be submitted nmp html Fibre based materials for non clothing applications (with WG4) Curved folding, Aline Roger, 2nd master Architectural Engineering Bruface, 2014 Le Nuage, Montpellier, Philippe Starck Publications: In the first part of the Action, state of the art reports for the most relevant sub topics will be established and communicated. At the end of the Action, the scientific outcomes will be published in the final report and the proceedings of the Research Conference and the recommendations for Standards as Technical Specifications. SYMPOSIUM proceedings Journal Articles: It is a priority to join forces and produce at least one joint international peer reviewed scientific journal paper per year per working group. If allowed by the copyrights, also these articles will be made available on the website. Round Robin II (WG4) + Peter Gosling + team, Giogio Novati + team, Marijke Mollaert + team Round Robin III Mention TENSINET COST ACTION TU1303 SYMPOSIUM 2016 Novel structural skins October 2016 TOPICS 1/ New applications of structural skins and new concepts 2/ Sustainability and Life Cycle Analysis of structural skins 3/ Building physics and energy performance of structural skins 4/ Materials and analysis 5/ From material to structure and limit states: codes and standardization 6/ Others It will be mentioned that the organising committee welcomes presentations on built projects, especially if they can illustrate advancements related to the topics (1) to (5). TENSINET COST ACTION TU1303 SYMPOSIUM 2016 Novel structural skins October 2016 TENSINET COST ACTION TU1303 SYMPOSIUM 2016 Novel structural skins October 2016 Scientific Committee WG leaders (2 x 5) + members proposed by the WG leaders LOCATION New applications of structural skins and new concepts Newcastle University Prof. Lars De Laet (Vrije Universiteit Brussel, Belgium) Prof. Tim Ibell (University of Bath, UK) Prof. Philippe Block (ETH Zurich, Switzerland) Marijke Mollaert Prof. Christoph Gengnagel (Universität der Künste Berlin, Germany) Dr. Julian Lienhard (str.ucture GmbH, Germany) Ass. Professor Martin Tamke (Royal Danish Academy of Fine Arts, School of Architecture, Denmark) 2

3 COST Action TU1303 meeting Denkendorf, 24 March, 2015 TENSINET COST ACTION TU1303 SYMPOSIUM 2016 Novel structural skins October 2016 Prof. Marijke Mollaert (Vrije Universiteit Brussel, Belgium) Dr. Jean Christophe Thomas (Université de Nantes, France) Dr. Jean Marc Bourinet (Institut Français de Mécanique Avancée, France) Prof. Peter Gosling (Newcastle University, UK) Prof. Franck Schoefs (Université de Nantes, France) Prof. Natalie Stranghöner (Universität Duisburg Essen, Germany) Dipl. Ing. Jörg Uhlemann (Universität Duisburg Essen, Germany) 4. Discussion about the Summer School FROM UNCERTAINTIES TO PARTIAL SAFETY FACTORS CALIBRATION: APPLICATION TO TENSILE MEMBRANE STRUCTURES Separate hand out (Standardisation_sti.pdf) 4. Discussion about the Summer School FROM UNCERTAINTIES TO PARTIAL SAFETY FACTORS CALIBRATION: APPLICATION TO TENSILE MEMBRANE STRUCTURES 1 Introduction and general [8p] 1.1 Placement of a Eurocode on membrane structures 1.2 Eurocode rules applicable to membrane structures 1.3 Structuring the Eurocode 3 Basis of design [21p] 3.1 General 3.2 Basic requirements 3.3 Actions and environmental influences 3.4 Prestress Definition and handling of prestress Appropriate prestress levels 3.5 Form finding and resulting geometric data 3.6 Verification by the partial factor method 4 Sustainability(Durability??) [4p] 4.1 General 4.2 Notions of sustainability of textile fabrics 4.3 Principles for conducting a sustainability analysis 5 Basis of structural analysis [23p] 5.1 General 5.2 Structural modelling for analysis 5.3 Global analysis 5.4 Methods of analysis 5.5 Pneumatic structures 6 Ultimate limit states (ULS) [11p] 6.1 General 6.2 Resistance of material and joints existing approaches 6.3 Harmonized view of the ULS verification of structural membranes 6.4 Membrane reinforcement 7 Serviceability limit states (SLS) [6p] 7.1 General 7.2 Deflections 7.3 Maintenance of the prestress and post tensioning 7.4 Wrinkling 7.5 Tear control 8 Details and connections [13p] 8.1 General 8.2 Membrane joints 8.3 Membrane edges 8.4 Membrane corners 8.5 Ridges and valleys 8.6 High and low points 8.7 Reinforcements 8.8 Base plates for masts and anchors 8.9 Anchors and foundations under tension 9 Execution of membrane structures [6p] 9.1 General 9.2 Cutting pattern determination, workshop drawings 9.3 Acquisition of the membrane material 9.4 Processing, cutting and welding 9.5 Particulars in PTFE glass fibre processing 9.6 Inspection before packing 9.7 Packaging and transportation 9.8 Erection SaP Report 10th Draft meeting pdf discussed in Paris Comments not yet integrated in the last version of the SaP Report (version 10) comments_by_v_tanev 02.docx text modules SaP report nieger.docx _anmerkungen ceno_9 SaP stg.doc SaP Report 9th Draft chapter 1 3 and ref_bp_kub_ docx SaP Report_9th_Draft _ _chapter_1 3_and_ref hbb final.docx silicone_glass. doc [BS] version 9 Nick Gibson.pdf 01 MM SaP Report 10th Draft c.docx 8 Details and connections_ceno_skizzen pdf 8 Details and connections_ceno.pdf SaP Report_10th_Draft _ceno.pdf SaP Report 10th Draft _bp_kub.pdf French comments.doc TC250_FlexFoldTest.docx [BS] TC250_MSJAmodified.docx [BS] Kommentare Stimpfle.pdf Marijke Mollaert 3

4 COST Action TU1303 meeting Denkendorf, 24 March, 2015 Improve? 1 Introduction and general [8p] 1.1 Placement of a Eurocode on membrane structures 1.2 Eurocode rules applicable to membrane structures 1.3 Structuring the Eurocode Should What are membrane structures not be explained in the beginning of the SaP report? To propose a contribution, I reworked (shortened) the Introduction engineering membrane structures, from the TensiNet Design Guide, initially written by Brian Foster and myself. Now being checked by practicing engineers. A part on inflated structures has to be added. Add the proposal from Bernd Stimpfle for bi axial testing Add the info from Bernd Stimpfle for silicon coated glass fabrics Add the proposal from Bernd Stimpfle for the Flex Fold Endurance Test? Or place it in an appendix? Integrate the proposals from Labor Blum Add paragraph on Optimum Seam Width? Remove, shorten or move to an appendix the current paragraph on long term loading? Add the paragraph on long term loading from Labor to the corresponding appendix? Move the Tensile strength after crease fold Essen method to an appendix? Include folding tests Running Crease according to Labor Blum method in the full text or in the appendix? Include Flex cracking test in the full text or in the appendix? The micromechanical model for the stressstrain behaviour of fabrics to be replaced by the given references The description of the wide panel tear test: formulas to be replaced by general descriptions; references to be added Also for shear behaviour, the relevant Figure 4 2 will remain The description regarding the determination of stiffness parameters for ETFE foils will be shortened; mention that the procedure is under development Marijke Mollaert 4

5 COST Action TU1303 meeting Denkendorf, 24 March, Basis of design [21p] 3.1 General 3.2 Basic requirements 3.3 Actions and environmental influences 3.4 Prestress Definition and handling of prestress Appropriate prestress levels 3.5 Form finding and resulting geometric data 3.6 Verification by the partial factor method The French mirror group discussed the comments from Kai Uwe Bletzinger/Benedikt Philipp and provides the reviewed text: to be included Update of code review 7 New formulation for position 2 3 Basis of design [21p] 3.1 General 3.2 Basic requirements 3.3 Actions and environmental influences 3.4 Prestress Definition and handling of prestress Appropriate prestress levels 3.5 Form finding and resulting geometric data 3.6 Verification by the partial factor method Safety factors to be applied on the actions/prestress/effect: add the contribution by Nick Gibson 3 Basis of design [21p] 3.1 General 3.2 Basic requirements 3.3 Actions and environmental influences 3.4 Prestress Definition and handling of prestress Appropriate prestress levels 3.5 Form finding and resulting geometric data 3.6 Verification by the partial factor method Add the info on compensation from Nick Gibson 4 Sustainability(Durability??) [4p] 4.1 General 4.2 Notions of sustainability of textile fabrics 4.3 Principles for conducting a sustainability analysis Reviewed by the French mirror group 5 Basis of structural analysis [23p] 5.1 General 5.2 Structural modelling for analysis 5.3 Global analysis 5.4 Methods of analysis 5.5 Pneumatic structures Review by K. U. Bletzinger and B. Philipp Reduce the part on inflated beams (Annexe?) 6 Ultimate limit states (ULS) [11p] 6.1 General 6.2 Resistance of material and joints existing approaches 6.3 Harmonized view of the ULS verification of structural membranes 6.4 Membrane reinforcement Different proposed design concepts for ETFE foils will be supplemented. Rogier Houtman, Karsten Moritz and Bernd Stimpfle will send contributions 8 Details and connections [13p] 8.1 General 8.2 Membrane joints 8.3 Membrane edges 8.4 Membrane corners 8.5 Ridges and valleys 8.6 High and low points 8.7 Reinforcements 8.8 Base plates for masts and anchors 8.9 Anchors and foundations under tension 7 Serviceability limit states (SLS) [6p] 7.1 General 7.2 Deflections 7.3 Maintenance of the prestress and post tensioning 7.4 Wrinkling 7.5 Tear control Review and comments by K. U. Bletzinger and B. Philipp Marijke Mollaert 5

6 meeting Denkendorf, 24 March, 2015 State of the art drawings will be provided by 9 Execution of membrane structures [6p] 9.1 General Bernd Stimpfle and Maike Nieger. The French 9.2 Mirror Group will provide further information. Cutting pattern determination, workshop drawings 9.3 Acquisition of the membrane material 9.4 Processing, cutting and welding 9.5 Particulars in PTFE glass fibre processing 9.6 Inspection before packing 9.7 Packaging and transportation 9.8 Erection The French Mirror Group will provide further information: whole tasklist Ask Spain? UK? Italy? to add As we have the TensiNet database, references? To comment? proposal to integrate a selection of recently built projects 1 picture Select well engineered and interesting (European) projects (from the structural point of view) Add a few structural sentences Max. 4 per country (each country/ member can propose their preferences) Mid of April 2015: Send additional remarks on final draft to Natalie Stranghöner and Jörg Uhlemann 6th May 2015: CEN/TC 250 WG 5 meeting at Afnor, Paris (if necessary), 10:30 am? Add the logo s: CEN TensiNet Association Techtextil? 11th of May 2015: the convener Marijke Mollaert hands over the Sap Report to CEN TC250 Marijke Mollaert 6

7 COST Action TU1303 meeting Denkendorf, 24 March, 2015 End of April 2015: Distribution of the final draft to members of CEN/TC th of May 2015: Send additional remarks on final draft to Natalie Stranghöner and Jörg Uhlemann 18 th of May: CEN/TC 250 WG 5 skype meeting, 10 am End of June 2015: the convener Marijke Mollaert hands over the Sap Report to CEN TC Discussion about the Summer School FROM UNCERTAINTIES TO PARTIAL SAFETY FACTORS CALIBRATION: APPLICATION TO TENSILE MEMBRANE STRUCTURES Please communicate/consolidate comments in the appropriate sub group Separate hand out Round Robin III 4. Discussion about the Summer School FROM UNCERTAINTIES TO PARTIAL SAFETY FACTORS CALIBRATION: APPLICATION TO TENSILE MEMBRANE STRUCTURES 4. Discussion about the Summer School FROM UNCERTAINTIES TO PARTIAL SAFETY FACTORS CALIBRATION: APPLICATION TO TENSILE MEMBRANE STRUCTURES Planning/organisation of summer school? When? Where? Program? Marijke Mollaert 7

8 meeting Denkendorf, 24 March, 2015 Planning/organisation of summer school? When? Where? Program? Short lecture about the importance of standardization and integrated design, by Bernd Stimpfle (formtl) The status of the State of the Art and Policy Report for the structural analysis of membrane structures, by Marijke Mollaert (VUB) The status of the Round Robin exercise on Wind, by Jimmy Colliers (VUB) Discussion about the Summer School FROM UNCERTAINTIES TO PARTIAL SAFETY FACTORS CALIBRATION: APPLICATION TO TENSILE MEMBRANE STRUCTURES Misc. Conclusions/Actions Scientific and Policy Report (SaP Report) to be delivered End of June(with CEN/TC 250/) Actions Round Robin exercise III (Jimmy Colliers) STSM? Summer school reliability! Joined paper WG4 + on recent bi axial testing results / Round Robin II Report on Existing Research: Wind loading Guidance/educational pack Website Conclusion Innovative networking Inter disciplinary networking New networking Self evaluation: Indicate the main successes, drawbacks (if any) and the key difficulties encountered (if any) it is hard to make engineering firms to contribute Intensify Industrial partners? Marijke Mollaert 8