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Associate Professor Johnny Ho
Associate Professor

Johnny Ho

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Overview

Background

Johnny Ho joined School of Civil Engineering, The University of Queensland (UQ) in Sep 2013 as a Senior Lecturer. Before joining UQ, Dr Ho has been working in both Hong Kong and Brisbane offices of Arup from 2003 to 2007 on some large scale infrastructure projects such as The Stonecutters Bridge in Hong Kong and Ipswich Motorway Upgrade (Wacol to Darra) in Queensland, Australia. In Sep 2007, he joined the Department of Civil Engineering, The University of Hong Kong as an Assistant Professor. Dr Ho’s research interests are on scientific study on dilatancy of High-flowability and -perfromance concrete due to poly-carboxylate based superplasticizers and its application to concrete-filled steel tubular (CFST) and FRP-confined concrete structures. He has developed discrete element modelling of binary packing of 2D discs and 3D spheres using Python and C++ coding. This model, combined with the rheological model of superplasticized concrete, will contribute a more scientific concrete mix design method for low-carbon-footprint, low cost and high performance concrete (HPC) based on wet packing modelling of particles in the fresh concrete with incorporation of multi-sized fillers. Dr Ho is also interested in applying the low-carbon-footprint high-performance concrete to single- and double-skinned concrete-filled-steel-tube and FRP-confined columns with external steel confinement and/or internal concrete expansive agent.

Dr Ho has published over 100 SCI journal papers and 40 conference papers. Two of his journal papers have been awarded the Transactions Prizes in respectively 2004 and 2005 presented by The Hong Kong Institution of Engineers. In 2011, Dr Ho was awarded the Best Presenter in the 11th International Conference on Concrete Engineering and Technology in Malaysia. In 2010, one of his students was awarded The Hong Kong Institution of Engineers Outstanding Paper Award for Young Engineers/Researchers. Dr Ho has also been very successful in obtaining research and teaching grants, including a HK$1.2m General Research Fund (GRF) grant in Hong Kong in 2010, an A$286K ARC Discovery Project (DP) grant in 2015 and a CNY$600K National Science Foundation (NSF) Grant in 2020 in PRC. Dr Ho has also been very successful in supervision of undergraduate student in performing their final year projects/thesis. In 2012 and 2013, two of his Final Year Project students were given the Merit Awards of the ICE (Institution of Civil Engineers) Hong Kong Graduates and Students Papers Competition for the outstanding project work. In 2017, his thesis project student were awarded The HKIE Outstanding Paper Award for Young Engineers/Researchers by the Hong Kong Institution of Engineers and was awarded HKD$5,000 cash prize and a return ticket to and accomodation in Hong Kong for presenting his awarded paper.

Dr Ho is a passionate teacher and one of the most popular lecturers amongst the students. He is responsbile for teaching a broad range of structural engineering courses, which consist of Reinforced concrete design as per EC2, AS3600 and Hong Kong Code, Prestressed concrete design as per EC2 and AS3600, Structural analysis, Finite element method, Design of steel structures as per AS4100, Structual fire engineering. Dr Ho obtained very high teaching (92%) and course (85%) evaluation scores in every semester since 2013 and was awarded the "Most Effective Teacher by Dean’s Commendation Students" in the Faculty of EAIT, UQ, in 2017, 2018, 2020, 2021 and 2022.

Availability

Associate Professor Johnny Ho is:
Available for supervision

Qualifications

  • Doctor of Philosophy, University of Hong Kong

Research interests

  • low-carbon-footprint and high-performance concrete using fillers

    Study of the effect of pozzolanic and inert fillers on the strength, workability and durability performance of concrete

  • Stress-strain model of confined concrete with silica fume

    Study of the effect of adding silica fume on the wet packing density and the constitutive modelling of confined concrete

  • Rheology of cement powder paste

    Investigation of the dilatancy swerve in superplasticized cement powder paste and mortar

  • Packing density physical modelling

    Coding developing of modelling packing of multi-sized spheres

Research impacts

To respond to global warming, my research advocates the use of low-carbon footprint high-performance concrete by designing scientifically concrete mixes using theory of packing density, filler technology and concrete/mortar/paste rheometry. The application of this type of concrete in hybrid-confined concrete-filled-steel-tube and FRP-confined conrete columns not only can improve the structural performance and safety of buildings and infrastructures, but also cut down the carbon footprint of the whole construction industry that offers Australia a more sustainable living environment. Theoretical dsicrete element models about the packing of binary 2D discs and 3D spherical particles are produced that will help the future investiagtion of the effect of particle packing in the design mix of concrete and hence developing method for concrete mix design using optimized particle size distribution.

Works

Search Professor Johnny Ho’s works on UQ eSpace

151 works between 2001 and 2025

1 - 20 of 151 works

2025

Journal Article

Tensile behavior of Q890 and Q960 high-strength steel butt joints after corrosion

Chen, Man-Tai, Gong, Zhichao, Cao, Huan, Shen, Chen, Ren, Fengming, Ho, Johnny Ching Ming and Lai, Mianheng (2025). Tensile behavior of Q890 and Q960 high-strength steel butt joints after corrosion. Engineering Structures, 330 119738, 119738. doi: 10.1016/j.engstruct.2025.119738

Tensile behavior of Q890 and Q960 high-strength steel butt joints after corrosion

2024

Journal Article

Residual mechanical properties of corroded ultra-high-strength steels and weld metals

Chen, Man-Tai, Gong, Zhichao, Cao, Huan, Zhang, Jingjing, Ren, Fengming, Ho, Johnny Ching Ming and Lai, Mianheng (2024). Residual mechanical properties of corroded ultra-high-strength steels and weld metals. Thin-Walled Structures, 205 (Part A) 112397. doi: 10.1016/j.tws.2024.112397

Residual mechanical properties of corroded ultra-high-strength steels and weld metals

2024

Journal Article

Improving the performance of crumb rubber concrete using waste ultrafine glass powder

Mo, Jinxu, Tian, Shiyu, Ren, Fengming and Ho, Johnny Ching Ming (2024). Improving the performance of crumb rubber concrete using waste ultrafine glass powder. Structures, 70 107775, 107775. doi: 10.1016/j.istruc.2024.107775

Improving the performance of crumb rubber concrete using waste ultrafine glass powder

2024

Journal Article

Improving the passing ability of SSCA-IS ultra-heavy-weight concrete by optimizing its packing structure

Huang, Z. C., Zhang, B. X., Ho, J. C.M., Ren, F. M. and Lai, M. H. (2024). Improving the passing ability of SSCA-IS ultra-heavy-weight concrete by optimizing its packing structure. Magazine of Concrete Research, 76 (21) 2400143, 1266-1278. doi: 10.1680/jmacr.24.00143

Improving the passing ability of SSCA-IS ultra-heavy-weight concrete by optimizing its packing structure

2024

Journal Article

Iron sand heavy-weight concrete – pre- and post-fire characteristics from wet packing density perspective

Lai, M. H., Xie, Y. M., Zhang, B. X., Ren, F. M., Kitipornchai, S. and Ho, J. C. M. (2024). Iron sand heavy-weight concrete – pre- and post-fire characteristics from wet packing density perspective. Construction and Building Materials, 435 136728. doi: 10.1016/j.conbuildmat.2024.136728

Iron sand heavy-weight concrete – pre- and post-fire characteristics from wet packing density perspective

2024

Journal Article

Axial compressive behavior of corroded H-shaped steel columns

Yu, Zhi-Wei, Li, Hao, Ho, J. C.M., Ma, Tian-Yu, Bao, Wei and Zhang, Jing-Zhou (2024). Axial compressive behavior of corroded H-shaped steel columns. Journal of Constructional Steel Research, 218 108726, 1-15. doi: 10.1016/j.jcsr.2024.108726

Axial compressive behavior of corroded H-shaped steel columns

2024

Journal Article

Pre- and post-fire behaviour of glass concrete from wet packing density perspective

Lai, M.H., Lu, Z.Y., Luo, Y.T., Ren, F.M., Cui, J., Wu, Z.R. and Ho, J.C.M. (2024). Pre- and post-fire behaviour of glass concrete from wet packing density perspective. Journal of Building Engineering, 86 108758, 1-18. doi: 10.1016/j.jobe.2024.108758

Pre- and post-fire behaviour of glass concrete from wet packing density perspective

2024

Journal Article

Fillers to improve the ductility and impermeability of crumb rubber concrete

Ren, Fengming, Mo, Jinxu, Wang, Qing, Tian, Shiyu, Lai, Mianheng and Ho, Johnny Ching Ming (2024). Fillers to improve the ductility and impermeability of crumb rubber concrete. Construction and Building Materials, 425 136073, 1-12. doi: 10.1016/j.conbuildmat.2024.136073

Fillers to improve the ductility and impermeability of crumb rubber concrete

2024

Journal Article

A novel packing-coupled stress-strain model for confined concrete

Lai, M. H., Lin, J. L., Cui, J., Ren, F. M., Kitipornchai, S. and Ho, J. C.M. (2024). A novel packing-coupled stress-strain model for confined concrete. Engineering Structures, 303 117415, 1-16. doi: 10.1016/j.engstruct.2023.117415

A novel packing-coupled stress-strain model for confined concrete

2023

Journal Article

Pumping lightweight aggregate concrete into high-rise buildings

Wang, Qing, Pan, Cong, Liang, Yuhang, Gan, Wei and Ho, Johnny (2023). Pumping lightweight aggregate concrete into high-rise buildings. Journal of Building Engineering, 80 108069, 1-14. doi: 10.1016/j.jobe.2023.108069

Pumping lightweight aggregate concrete into high-rise buildings

2023

Journal Article

Thermal resistance of high strength PVA fiber reinforced engineered cementitious composites containing basalt fiber

Wang, Qing, Zhou, Yuxuan, Huang, Linhui, Lai, Mianheng and Ho, Johnny (2023). Thermal resistance of high strength PVA fiber reinforced engineered cementitious composites containing basalt fiber. Materials Letters, 350 134905, 134905. doi: 10.1016/j.matlet.2023.134905

Thermal resistance of high strength PVA fiber reinforced engineered cementitious composites containing basalt fiber

2023

Journal Article

Improving the post-fire behaviour of steel slag coarse aggregate concrete by adding GGBFS

Huang, Z.C., Ho, J.C.M., Cui, J., Ren, F.M., Cheng, X. and Lai, M.H. (2023). Improving the post-fire behaviour of steel slag coarse aggregate concrete by adding GGBFS. Journal of Building Engineering, 76 107283, 107283. doi: 10.1016/j.jobe.2023.107283

Improving the post-fire behaviour of steel slag coarse aggregate concrete by adding GGBFS

2023

Journal Article

Enhancing the post-fire behavior of steel slag normal-strength concrete by adding SCM

Lai, M.H., Chen, Z.H., Cui, J., Zhong, J.P., Wu, Z.R. and Ho, J.C.M. (2023). Enhancing the post-fire behavior of steel slag normal-strength concrete by adding SCM. Construction and Building Materials, 398 132336, 132336. doi: 10.1016/j.conbuildmat.2023.132336

Enhancing the post-fire behavior of steel slag normal-strength concrete by adding SCM

2023

Journal Article

Steel fiber to improve thermal resistance of high strength PVA-ECC after exposure to elevated temperature

Zhou, Yuxuan, Wang, Qing, Lai, Mianheng and Ho, Johnny Ching Ming (2023). Steel fiber to improve thermal resistance of high strength PVA-ECC after exposure to elevated temperature. Journal of Advanced Concrete Technology, 21 (9), 748-761. doi: 10.3151/jact.21.748

Steel fiber to improve thermal resistance of high strength PVA-ECC after exposure to elevated temperature

2023

Journal Article

Mortar film thickness on the autogenous shrinkage of concrete: test and simulation

Huang, Wenjie, Wang, Qing, Ma, Yuwei, Lai, Mianheng and Ho, J. C. M. (2023). Mortar film thickness on the autogenous shrinkage of concrete: test and simulation. Journal of Building Engineering, 66 105833, 1-15. doi: 10.1016/j.jobe.2023.105833

Mortar film thickness on the autogenous shrinkage of concrete: test and simulation

2023

Journal Article

Uni-axial behaviour of steel slag concrete-filled-steel-tube columns with external confinement

Lai, M. H., Lin, Y. H., Jin, Y. Y., Fei, Q., Wang, Z. C. and Ho, J. C.M. (2023). Uni-axial behaviour of steel slag concrete-filled-steel-tube columns with external confinement. Thin-Walled Structures, 185 110562, 1-15. doi: 10.1016/j.tws.2023.110562

Uni-axial behaviour of steel slag concrete-filled-steel-tube columns with external confinement

2023

Journal Article

Dilatancy swerve in superplasticized cement powder paste

Lai, M. H., Lao, W. C., Tang, W. K., Hanzic, L., Wang, Q. and Ho, J. C.M. (2023). Dilatancy swerve in superplasticized cement powder paste. Construction and Building Materials, 362 129524, 129524. doi: 10.1016/j.conbuildmat.2022.129524

Dilatancy swerve in superplasticized cement powder paste

2023

Journal Article

Impact of polyvinyl alcohol fiber on the full life-cycle shrinkage of cementitious composite

Wang, Qing, Xiong, Zihao, Zhang, Jun, Fang, Zhaosong, Lai, Mianheng and Ho, Johnny (2023). Impact of polyvinyl alcohol fiber on the full life-cycle shrinkage of cementitious composite. Journal of Building Engineering, 63 (Part A) 105463, 105463. doi: 10.1016/j.jobe.2022.105463

Impact of polyvinyl alcohol fiber on the full life-cycle shrinkage of cementitious composite

2023

Conference Publication

Load-carrying capacity of CFST columns: current design rules assessment

Ou, X. L., Ho, J. C.M. and Lai, M. H. (2023). Load-carrying capacity of CFST columns: current design rules assessment. The 17th East Asian-Pacific Conference on Structural Engineering and Construction, 2022, Singapore, Singapore, 27-30 June 2022. Gateway East, Singapore: Springer Singapore. doi: 10.1007/978-981-19-7331-4_107

Load-carrying capacity of CFST columns: current design rules assessment

2023

Conference Publication

Experimental study on the uni-axial behaviour of MSCFST columns considering concrete’s wet packing density

Mo, J. H., Zeng, M. R., Yang, S. J., Ho, J. C.M. and Lai, M. H. (2023). Experimental study on the uni-axial behaviour of MSCFST columns considering concrete’s wet packing density. 17th East Asian-Pacific Conference on Structural Engineering and Construction, Singapore, Singapore, 27–30 June 2022. Singapore, Singapore: Springer Singapore. doi: 10.1007/978-981-19-7331-4_106

Experimental study on the uni-axial behaviour of MSCFST columns considering concrete’s wet packing density

Funding

Current funding

  • 2023 - 2028
    ARC Research Hub to Advance Timber for Australia's Future Built Environment
    ARC Industrial Transformation Research Hubs
    Open grant

Past funding

  • 2015 - 2019
    Fire performance of concrete using novel fire testing
    ARC Discovery Projects
    Open grant

Supervision

Availability

Associate Professor Johnny Ho is:
Available for supervision

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Available projects

  • Rheology of cement powder paste/mortar and/or concrete

  • Packing density model of multi-sized spheres

  • Concrete-filled-steel-tube column with hybrid confinement

Supervision history

Completed supervision

Media

Enquiries

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