AMC TRR 277 Additive Manufacturing in Construction€¦ · Summary AMC The Challenge of Large Scale...
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Joinng Principles for Combinaon of Concrete Elements Produced by Different Addive Manufacturing Processes In this project, principal quesons on the joinng of addively manufactured (AM) structural components using dry joints will be invesgated. Based on the features of three AM processes (parcle-bed, extrusion, shotcrete), various joint types (smooth, profiled) and producon methods (directly printed, cut, grinded) are considered with regard to joint topology, dimensional accuracy and load-bearing behaviour. The invesgaon strategy comprises experimental, numerical and the- orecal methods and is consecuve in scale (micro, meso) as well as loading type (compression, shear). The results will provide fundamental insight into the load- bearing behaviour of AM dry joints. Summary AMC The Challenge of Large Scale TRR 277 Additive Manufacturing in Construction Technische Universität Braunschweig Technical University of Munich AMC The Challenge of Large Scale Additive Manufacturing in Construction TRR 277 Prof. Dr.-Ing Marn Empelmann Prof. Dr.-Ing. Harald Kloſt Instute of Building Materials, Concrete Construcon and Fire Safety, TUBS Instute of Structural Design, TUBS Preliminary Work • PL Marn Empelmann: DFG Priority Programme 1182 “Sustainable Building with UHPC” (2005-2012); BMWi research project “KoHöMaT” (2013-2016); BMWi research project “ConJack” (2017-2019) • PL Harald Kloſt: DFG Priority Programme 1542 “Concrete Light” (2011- 2018); NTH research project „Development of a roboc sprayed con- crete technology for generave manufacturing of complex concrete structures without formwork“ (2016-2019) • PLs Marn Empelmann & Harald Kloſt: Demonstrator “UNI-CON²” in DFG Priority Programme 1542 “Concrete Light” (2017); Producon of first 3D printed reinforced concrete columns (2019) 75 75 180 180 180 180 75 75 25 1250 25 50 50 *) *) UHPC double shear test with a pro- filed mortar joint 3D-printed and post-processed segmental concrete column 3D-prinng of reinforced concre- te columns Overview of the planned work packages (WP) and invesgaons Project Aims Role within TRR 277 • C05 is closely linked to projects A01 to A04, which deal with the concrete AM processes. • The findings of C05 will be integrated into the C projects C02, C04, C06 and C07. • An exchange with A06 is planned to iniate connecons between AM steel elements and AM concrete elements for future funding periods. Methods • Theorecal consideraons of suitable joint geometries and producon path (prinng and subtracve post- processing) • Experimental invesgaon of the producon of smooth and profiled dry joints • 3D-scanning of the joints and target-performance comparison with digital tools • Examinaon of the dry joints using CT, digital microscope and SEM to detect possible damage caused during the producon process • Experimental compression tests, double shear tests and segmental girder tests • Numerical invesgaons (FE analysis) to simulate addional test configuraons • Theorecal evaluaons of test results and derivaon of a calculaon approach This project aims are to invesgate the execuon, producon process and load-bearing capacity of the joint region of AM concrete segments. To reach this goal, four work packages (WP1 – WP4) with the following milestones are planned:
Transcript of AMC TRR 277 Additive Manufacturing in Construction€¦ · Summary AMC The Challenge of Large Scale...
Jointing Principles for Combination of Concrete Elements Produced by Different Additive Manufacturing Processes
In this project, principal questions on the jointing of additively manufactured (AM) structural components using dry joints will be investigated. Based on the features of three AM processes (particle-bed, extrusion, shotcrete), various joint types (smooth, profiled) and production methods (directly printed, cut, grinded) are considered with regard to joint topology, dimensional accuracy and load-bearing
behaviour. The investigation strategy comprises experimental, numerical and the-oretical methods and is consecutive in scale (micro, meso) as well as loading type (compression, shear). The results will provide fundamental insight into the load-bearing behaviour of AM dry joints.
Summary
AMC The Challenge of Large ScaleTRR 277 Additive Manufacturing in ConstructionTechnische Universität BraunschweigTechnical University of Munich
AMC The Challenge of Large ScaleAdditive Manufacturing in Construction
TRR 277
Prof. Dr.-Ing Martin EmpelmannProf. Dr.-Ing. Harald Kloft
Institute of Building Materials, Concrete Construction and Fire Safety, TUBSInstitute of Structural Design, TUBS
Preliminary Work• PL Martin Empelmann: DFG Priority Programme 1182 “Sustainable
Building with UHPC” (2005-2012); BMWi research project “KoHöMaT” (2013-2016); BMWi research project “ConJack” (2017-2019)
• PL Harald Kloft: DFG Priority Programme 1542 “Concrete Light” (2011-2018); NTH research project „Development of a robotic sprayed con-crete technology for generative manufacturing of complex concrete structures without formwork“ (2016-2019)
• PLs Martin Empelmann & Harald Kloft: Demonstrator “UNI-CON²” in DFG Priority Programme 1542 “Concrete Light” (2017); Production of first 3D printed reinforced concrete columns (2019)
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75
180
180
180
180
75
75
25
1250
250
3030
Querschnitt:
1 6 Ø16
2 Bügel Ø8
Ansicht:
190
25
50
50
Bügelschlösserversetzt anordnen.
410
Alle Angaben in [mm].
2 Bügelbewehrung:
*)
*)
*) Überlänge
UHPC double shear test with a pro-filed mortar joint
3D-printed and post-processed segmental concrete column
3D-printing of reinforced concre-te columns
Overview of the planned work packages (WP) and investigations
Project Aims
Role within TRR 277• C05 is closely linked to projects A01 to A04, which deal with the concrete
AM processes.• The findings of C05 will be integrated into the C projects C02, C04, C06
and C07.• An exchange with A06 is planned to initiate connections between AM
steel elements and AM concrete elements for future funding periods.
Methods• Theoretical considerations of suitable joint geometries and production path (printing and subtractive post-
processing)• Experimental investigation of the production of smooth and profiled dry joints• 3D-scanning of the joints and target-performance comparison with digital tools • Examination of the dry joints using CT, digital microscope and SEM to detect possible damage caused during
the production process• Experimental compression tests, double shear tests and segmental girder tests • Numerical investigations (FE analysis) to simulate additional test configurations • Theoretical evaluations of test results and derivation of a calculation approach
This project aims are to investigate the execution, production process and load-bearing capacity of the joint region of AM concrete segments. To reach this goal, four work packages (WP1 – WP4) with the following milestones are planned:
