Lecturer in Structural Engineering
Overview
My expertise is structural timber engineering and my research interests encompass the theory, analysis, design and performance of timber connections, detailing for timber durability, timber offsite construction using both engineered wood products and light timber framing and design for manufacture, assembly and disassembly (DfMA+D). I joined UQ in 2019 as a lecturer in structural engineering. Prior to that I completed a PhD on the seismic performance of connections in tall timber buildings at the University of Canterbury, New Zealand. I also hold a Masters of Science in structural engineering from Delft University of Technology, and a Bachelor of Science from Karlsruhe Institute of Technology. In the past I have researched geodesic bamboo domes and bamboo connections.
I am currently a steering committee member of the CTBUH Research Project "The Future Potential of Steel-Timber Composite Structures" , a working group member of WG1 and WG2 of COST Action Helen, a founding member of the International Association for Mass Timber Construction, and have been a steering committee member of the prefabAUS / Fleetwood Challenge Cup since 2019.
Research Interests
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Structural timber engineering
Connection design, durability of timber connections, timber design standards, reversible connections, capacity design, modular timber buildings, engineered wood products -
Modular and offsite construction of timber buildings
Design for disassembly, adaptable and flexible building design, modular and offsite construction, design for circular economy, structural performance of reclaimed timber, design for reuse -
Contact-free measuring techniques
Digital image correlation (DIC) and particle tracking (PT)
Qualifications
- Bachelor of Civil Engineering, Karlsruhe Institute of Technology
- Master of Civil Engineering, Delft University of Technology
- Doctor of Philosophy, University of Canterbury
Publications
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Journal Article: Design for adaptability, disassembly and reuse – A review of reversible timber connection systems
Ottenhaus, Lisa-Mareike, Yan, Zidi, Brandner, Reinhard, Leardini, Paola, Fink, Gerhard and Jockwer, Robert (2023). Design for adaptability, disassembly and reuse – A review of reversible timber connection systems. Construction and Building Materials, 400 132823, 132823. doi: 10.1016/j.conbuildmat.2023.132823
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Other Outputs: Tall timber buildings are exciting, but to shrink construction’s carbon footprint we need to focus on the less sexy ‘middle’
Ottenhaus, Lisa (2022, 08 15). Tall timber buildings are exciting, but to shrink construction’s carbon footprint we need to focus on the less sexy ‘middle’ The Conversation
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Journal Article: Analytical derivation and experimental verification of overstrength factors of dowel-type timber connections for capacity design
Ottenhaus, Lisa-Mareike, Li, Minghao and Smith, Tobias (2020). Analytical derivation and experimental verification of overstrength factors of dowel-type timber connections for capacity design. Journal of Earthquake Engineering, 26 (6), 1-15. doi: 10.1080/13632469.2020.1781711
Grants
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Offsite manufacture reimagined for high-performance adaptable housing
(2022–2027) ARC Linkage Projects
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Study Fresh: Using Citizen Science to Engage School Children with Indoor Air Quality
(2020–2022) Queensland Citizen Science Grants
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Establishing carbon credentials of timber in construction
(2020) Queensland Department of Agriculture and Fisheries
Supervision
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Investigation of engineered recycled hardwood and natural fibre composite products
Doctor Philosophy
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Integrated design of connection systems for modular prefab timber buildings
Doctor Philosophy
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Offsite Timber Manufacture Potential for Incremental and Transformative Housing In Australia
Doctor Philosophy
Available Projects
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Research on timber connections
Fundamental research is needed to characterise basic system properties of Australian timber products to update the Australian timber design standard AS1720.1. The following research gaps may be addressed:
1) investigate embedment strength of dowel-type fasteners in different Australian timber species and products; derive reliable regression models for strength prediction; characterise the effect of moisture on embedment strength; establish conversion formulae to harmonise half hole and full hole embedment tests in sawn timber, LVL, and CLT;
2) study of screwed connections in Australian timber species and products including high density hardwoods; determine screw withdrawal parameters and develop analytical models to quantify the effect of boundary conditions, spacings, compound angles and group effect; investigate suitable screw arrangements to reinforce carpentry joints;
3) other fundamental experimental research on timber connections may be considered.
Formal education in timber engineering is a prerequisite to undertake this research. Previous research experience is desirable (e.g. BHon or Master thesis research). Applicants will have to secure a competitive HDR scholarship to support their research.
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Durability performance of timber connections in treated wood
Fundamental research is needed to understand the durability performance of timber connections in treated wood. This includes, but is not limited to, the behaviour of common fasteners such as nails, screws, and dowels in chemically treated timber, thermally modified timber and timber products, subjected to repeated wetting and drying, as well as fungal decay. A competitive scholarship needs to be obtained to undertake this work.
Publications
Featured Publications
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Ottenhaus, Lisa (2022, 08 15). Tall timber buildings are exciting, but to shrink construction’s carbon footprint we need to focus on the less sexy ‘middle’ The Conversation
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Ottenhaus, Lisa-Mareike, Li, Minghao and Smith, Tobias (2020). Analytical derivation and experimental verification of overstrength factors of dowel-type timber connections for capacity design. Journal of Earthquake Engineering, 26 (6), 1-15. doi: 10.1080/13632469.2020.1781711
Journal Article
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Design for adaptability, disassembly and reuse – A review of reversible timber connection systems
Ottenhaus, Lisa-Mareike, Yan, Zidi, Brandner, Reinhard, Leardini, Paola, Fink, Gerhard and Jockwer, Robert (2023). Design for adaptability, disassembly and reuse – A review of reversible timber connection systems. Construction and Building Materials, 400 132823, 132823. doi: 10.1016/j.conbuildmat.2023.132823
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Yan, Zidi, Ottenhaus, Lisa-Mareike, Yermán, Luis and Scheibenreiter, Johann (2023). Influence of wet-dry cycles on the withdrawal capacity and corrosion of zinc electroplated self-tapping screws in CCA-treated and untreated Southern pine. Case Studies in Construction Materials, 19 e02429, e02429. doi: 10.1016/j.cscm.2023.e02429
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A parametric design framework for timber framing span tables
Jiang, Jian, Ottenhaus, Lisa-Mareike and Gattas, Joseph M. (2023). A parametric design framework for timber framing span tables. Australian Journal of Civil Engineering, ahead-of-print (ahead-of-print), 1-16. doi: 10.1080/14488353.2023.2227432
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Yan, Zidi, Ottenhaus, Lisa-Mareike, Leardini, Paola and Jockwer, Robert (2022). Performance of reversible timber connections in Australian light timber framed panelised construction. Journal of Building Engineering, 61 105244, 1-16. doi: 10.1016/j.jobe.2022.105244
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Effect of wetting and fungal degradation on performance of nailed timber connections
Yermán, Luis, Zhang, Yuhao, He, Jiangwan, Xiao, Martin, Ottenhaus, Lisa-Mareike and Morrell, Jeffrey J. (2022). Effect of wetting and fungal degradation on performance of nailed timber connections. Construction and Building Materials, 353 129113, 129113. doi: 10.1016/j.conbuildmat.2022.129113
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Snow, Stephen, Danam, Royce, Leardini, Paola, Glencross, Mashhuda, Beeson, Brett, Ottenhaus, Lisa-Mareike and Boden, Marie (2022). Human factors affecting ventilation in Australian classrooms during the COVID-19 pandemic: Toward insourcing occupants' proficiency in ventilation management. Frontiers in Computer Science, 4 888688. doi: 10.3389/fcomp.2022.888688
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Ottenhaus, Lisa-Mareike, Li, Zancong and Crews, Keith (2022). Half hole and full hole dowel embedment Strength: A review of international developments and recommendations for Australian softwoods. Construction and Building Materials, 344 128130, 1-16. doi: 10.1016/j.conbuildmat.2022.128130
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Yermán, Luis, Ottenhaus, Lisa-Mareike, Zhang, Yuhao and Morrell, Jeffrey J. (2021). Effect of thermal modification of slash pine with linseed oil on water repellency and performance of mechanical connections. Construction and Building Materials, 305 124776, 124776. doi: 10.1016/j.conbuildmat.2021.124776
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Designing timber connections for ductility – a review and discussion
Ottenhaus, Lisa-Mareike, Jockwer, Robert, van Drimmelen, David and Crews, Keith (2021). Designing timber connections for ductility – a review and discussion. Construction and Building Materials, 304 124621. doi: 10.1016/j.conbuildmat.2021.124621
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Yermán, Luis, Ottenhaus, Lisa-Mareike, Montoya, Camilo and Morrell, Jeffrey J. (2021). Effect of repeated wetting and drying on withdrawal capacity and corrosion of nails in treated and untreated timber. Construction and Building Materials, 284 122878, 122878. doi: 10.1016/j.conbuildmat.2021.122878
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El Houjeyri, I., Thi, V. D., Oudjene, M., Ottenhaus, L.-M., Khelifa, M. and Rogaume, Y. (2020). Coupled nonlinear-damage finite element analysis and design of novel engineered wood products made of oak hardwood. European Journal of Wood and Wood Products, 79 (1), 29-47. doi: 10.1007/s00107-020-01617-7
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Ductility and overstrength of nailed CLT hold-down connections
Dong, Wenchen, Li, Minghao, Ottenhaus, Lisa-Mareike and Lim, Hyungsuk (2020). Ductility and overstrength of nailed CLT hold-down connections. Engineering Structures, 215 110667, 110667. doi: 10.1016/j.engstruct.2020.110667
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Ottenhaus, Lisa-Mareike, Li, Minghao and Smith, Tobias (2020). Analytical derivation and experimental verification of overstrength factors of dowel-type timber connections for capacity design. Journal of Earthquake Engineering, 26 (6), 1-15. doi: 10.1080/13632469.2020.1781711
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UQ: timber engineering innovations
Ottenhaus, Lisa-Mareike (2019). UQ: timber engineering innovations. Built Offsite Magazine, 18, 37.
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Use of particle tracking velocimetry in timber material and connection testing
Ottenhaus, Lisa-Mareike, Li, Minghao, Nokes, Roger, Cammock, Peter and McInnes, Braeden (2019). Use of particle tracking velocimetry in timber material and connection testing. European Journal of Wood and Wood Products, 77 (2), 195-209. doi: 10.1007/s00107-018-1376-y
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Structural performance of large-scale dowelled CLT connections under monotonic and cyclic loading
Ottenhaus, Lisa-Mareike, Li, Minghao and Smith, Tobias (2018). Structural performance of large-scale dowelled CLT connections under monotonic and cyclic loading. Engineering Structures, 176, 41-48. doi: 10.1016/j.engstruct.2018.09.002
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Mode cross-over and ductility of dowelled LVL and CLT connections under monotonic and cyclic loading
Ottenhaus, Lisa-Mareike, Li, Minghao, Smith, Tobias and Quenneville, Pierre (2018). Mode cross-over and ductility of dowelled LVL and CLT connections under monotonic and cyclic loading. Journal of Structural Engineering, 144 (7) 04018074, 04018074. doi: 10.1061/(asce)st.1943-541x.0002074
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Embedment strength of New Zealand Cross laminated timber
Ottenhaus, L.-M. and Li, M. (2018). Embedment strength of New Zealand Cross laminated timber. New Zealand Timber Design Journal, 26 (1), 12-16.
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Overstrength of dowelled CLT connections under monotonic and cyclic loading
Ottenhaus, Lisa-Mareike, Li, Minghao, Smith, Tobias and Quenneville, Pierre (2017). Overstrength of dowelled CLT connections under monotonic and cyclic loading. Bulletin of Earthquake Engineering, 16 (2), 753-773. doi: 10.1007/s10518-017-0221-8
Conference Publication
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Yan, Zidi, Ottenhaus, Lisa-Mareike, Lin, Jingyuan, Jockwer, Robert and Ringhofer, Andreas (2023). The impacts of screw tip, inclination angles, and number of penetration layers on screw withdrawal capacity of Australian machine graded pine. World Conference on Timber Engineering (WCTE), Oslo, Norway, 17-21 June 2023. As, Norway: World Conference on Timber Engineering (WCTE). doi: 10.52202/069179-0185
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Impact of moisture cycling on screw withdrawal capacity of treated and untreated radiata pine
Yermán, Luis, Yan, Zidi, Feng, Wen and Ottenhaus, Lisa-Mareike (2023). Impact of moisture cycling on screw withdrawal capacity of treated and untreated radiata pine. World Conference on Timber Engineering (WCTE 2023), Oslo, Norway, 19-22 June 2023. Ås, Norway: World Conference on Timber Engineering (WCTE 2023). doi: 10.52202/069179-0164
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TOWARDS ADAPTABILITY AND CIRCULARITY OF TIMBER BUILDINGS
Jockwer, Robert, Öberg, Vera, Ottenhaus, Lisa-Mareike, Leardini, Paola and Goto, Yutaka (2023). TOWARDS ADAPTABILITY AND CIRCULARITY OF TIMBER BUILDINGS. As, Norway: World Conference on Timber Engineering (WCTE 2023). doi: 10.52202/069179-0203
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Yan, Zidi, Ottenhaus, Lisa-Mareike and Yermán, Luis (2022). Effect of repeated wetting and drying on withdrawal capacity and corrosion of european screws in treated and untreated australian sawn timber. Society of Wood Science and Technology (SWST), Kingscliff, NSW Australia, 10-15 July 2022. Society of Wood Science and Technology.
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Ductility of dowelled New Zealand Douglas-Fir CLT connections under monotonic and cyclic loading
Brown, Justin, Ottenhaus, Lisa-Mareike, Ravn, Chris and Scott, Ben (2019). Ductility of dowelled New Zealand Douglas-Fir CLT connections under monotonic and cyclic loading. 11th Pacific Conference on Earthquake Engineering (PCEE), Auckland, New Zealand, 4-6 April 2019. McKinnon, VIC Australia: New Zealand Society for Earthquake Engineering (NZSEE) and Australian Earthquake Engineering Society.
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Analytical method to derive overstrength of dowel-type connections overstrength components
Ottenhaus, Lisa-Mareike, Li, Minghao and Smith, Tobias (2018). Analytical method to derive overstrength of dowel-type connections overstrength components. International Network on Timber Engineering Research (INTER 2018), Tallinn, Estonia, 13-16 August 2018. Karlsruhe, Germany: Timber Scientific Publishing.
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Application of particle tracking in large scale timber connection testing
Ottenhaus, Lisa-Mareike, Li, Minghao and Nokes, Roger (2018). Application of particle tracking in large scale timber connection testing. 2018 World Conference on Timber Engineering (WCTE 2018), Seoul, South Korea, 20-23 August 2018. World Conference on Timber Engineering (WCTE).
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Overstrength of large-scale dowelled connections in CLT
Ottenhaus, Lisa-Mareike, Li, Minghao and Smith, Tobias (2018). Overstrength of large-scale dowelled connections in CLT. 2018 NZSEE Conference, Auckland, New Zealand, 13-15 April 2018.
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Ductility of large-scale dowelled CLT connections under monotonic and cyclic loading
Ottenhaus, Lisa-Mareike, Li, Minghao and Smith, Tobias (2017). Ductility of large-scale dowelled CLT connections under monotonic and cyclic loading. Australian Earthquake Engineering Society (AEES) 2017 Conference, Canberra, ACT, Australia, 24-26 November 2017.
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Ductility and overstrength of dowelled LVL and CLT connections under cyclic loading
Ottenhaus, Lisa-Mareike, Li, Minghao, Smith, Tobias and Quenneville, Pierre (2016). Ductility and overstrength of dowelled LVL and CLT connections under cyclic loading. 2016 World Conference on Timber Engineering (WCTE 2016), Vienna, Austria, 22-25 August 2016. Vienna, Austria: Vienna University of Technology.
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Ductility of dowelled and nailed CLT and LVL connections under monotonic and cyclic loading
Ottenhaus, Lisa-Mareike, Li, Minghao, Smith, Tobias and Quenneville, Pierre (2016). Ductility of dowelled and nailed CLT and LVL connections under monotonic and cyclic loading. Australian Earthquake Engineering Society (AEES) 2016 Conference, Melbourne, VIC, Australia, 24-27 November 2016.
Other Outputs
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Timber wall frame span table datasets
Jiang, Jian, Gattas, Joe and Ottenhaus, Lisa (2023). Timber wall frame span table datasets. The University of Queensland. (Dataset) doi: 10.48610/64163b4
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Ottenhaus, Lisa (2022, 08 15). Tall timber buildings are exciting, but to shrink construction’s carbon footprint we need to focus on the less sexy ‘middle’ The Conversation
Grants (Administered at UQ)
-
Offsite manufacture reimagined for high-performance adaptable housing
(2022–2027) ARC Linkage Projects
-
Study Fresh: Using Citizen Science to Engage School Children with Indoor Air Quality
(2020–2022) Queensland Citizen Science Grants
-
Establishing carbon credentials of timber in construction
(2020) Queensland Department of Agriculture and Fisheries
PhD and MPhil Supervision
Current Supervision
-
Investigation of engineered recycled hardwood and natural fibre composite products
Doctor Philosophy — Principal Advisor
Other advisors:
-
Integrated design of connection systems for modular prefab timber buildings
Doctor Philosophy — Principal Advisor
Other advisors:
-
Offsite Timber Manufacture Potential for Incremental and Transformative Housing In Australia
Doctor Philosophy — Associate Advisor
Other advisors:
-
Moisture Safety for Energy-efficient CLT Envelopes: Pathways to Net-zero Operational Energy for Engineered Wood Multi-storey Buildings in Australian Tropical and Subtropical Climates
Doctor Philosophy — Associate Advisor
Other advisors:
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Optimisation of timber selection in low-rise residential building wall frame construction
Master Philosophy — Associate Advisor
Other advisors:
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Effect of moisture content changeson the performance of timber connections
Doctor Philosophy — Associate Advisor
Other advisors:
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Effects of decay on timber connections
Doctor Philosophy — Associate Advisor
Other advisors:
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Timber Construction for Carbon Mitigation
Doctor Philosophy — Associate Advisor
Other advisors:
Possible Research Projects
Note for students: The possible research projects listed on this page may not be comprehensive or up to date. Always feel free to contact the staff for more information, and also with your own research ideas.
-
Research on timber connections
Fundamental research is needed to characterise basic system properties of Australian timber products to update the Australian timber design standard AS1720.1. The following research gaps may be addressed:
1) investigate embedment strength of dowel-type fasteners in different Australian timber species and products; derive reliable regression models for strength prediction; characterise the effect of moisture on embedment strength; establish conversion formulae to harmonise half hole and full hole embedment tests in sawn timber, LVL, and CLT;
2) study of screwed connections in Australian timber species and products including high density hardwoods; determine screw withdrawal parameters and develop analytical models to quantify the effect of boundary conditions, spacings, compound angles and group effect; investigate suitable screw arrangements to reinforce carpentry joints;
3) other fundamental experimental research on timber connections may be considered.
Formal education in timber engineering is a prerequisite to undertake this research. Previous research experience is desirable (e.g. BHon or Master thesis research). Applicants will have to secure a competitive HDR scholarship to support their research.
-
Durability performance of timber connections in treated wood
Fundamental research is needed to understand the durability performance of timber connections in treated wood. This includes, but is not limited to, the behaviour of common fasteners such as nails, screws, and dowels in chemically treated timber, thermally modified timber and timber products, subjected to repeated wetting and drying, as well as fungal decay. A competitive scholarship needs to be obtained to undertake this work.
