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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

81 - 100 of 151 works

2016

Conference Publication

Improving crack resistance of confined concrete by silica fume

Roslee, A. A., Fernando, D. and Ho, J. C. M. (2016). Improving crack resistance of confined concrete by silica fume. 8th International Conference on Steel and Aluminium Structures (ICSAS), Hong Kong, China, 7-9 December 2016. Hong Kong, China: University of Hong Kong, Department of Civil Engineering.

Improving crack resistance of confined concrete by silica fume

2016

Conference Publication

External confining effect in concrete-filled-steel-tube columns

Ho, Johnny (2016). External confining effect in concrete-filled-steel-tube columns. The 14th East Asia-Pacific Conference on Structural Engineering and Construction, Ho Chi Minh City, Vietnam, 6-8 January 2016.

External confining effect in concrete-filled-steel-tube columns

2015

Journal Article

Axial strengthening of thin-walled concrete-filled-steel-tube columns by circular steel jackets

Lai, M. H. and Ho, J. C. M. (2015). Axial strengthening of thin-walled concrete-filled-steel-tube columns by circular steel jackets. Thin-Walled Structures, 97, 11-21. doi: 10.1016/j.tws.2015.09.002

Axial strengthening of thin-walled concrete-filled-steel-tube columns by circular steel jackets

2015

Journal Article

Finite element analysis of axially loaded FRP-confined rectangular concrete columns

Lo, S. H., Kwan, A. K. H., Ouyang, Y. and Ho, J. C. M. (2015). Finite element analysis of axially loaded FRP-confined rectangular concrete columns. Engineering Structures, 100, 253-263. doi: 10.1016/j.engstruct.2015.06.010

Finite element analysis of axially loaded FRP-confined rectangular concrete columns

2015

Journal Article

Optimal design of external rings for confined CFST columns

Lai, M. H. and Ho, J. C. M. (2015). Optimal design of external rings for confined CFST columns. Magazine of Concrete Research, 67 (19), 1017-1032. doi: 10.1680/macr.14.00348

Optimal design of external rings for confined CFST columns

2015

Journal Article

Axial and lateral stress-strain model for FRP confined concrete

Kwan, A. K. H., Dong, C. X. and Ho, J. C. M. (2015). Axial and lateral stress-strain model for FRP confined concrete. Engineering Structures, 99, 285-295. doi: 10.1016/j.engstruct.2015.04.046

Axial and lateral stress-strain model for FRP confined concrete

2015

Journal Article

Effects of confining stiffness and rupture strain on performance of FRP confined concrete

Dong, C. X., Kwan, A. K. H. and Ho, J. C. M. (2015). Effects of confining stiffness and rupture strain on performance of FRP confined concrete. Engineering Structures, 97, 1-14. doi: 10.1016/j.engstruct.2015.03.037

Effects of confining stiffness and rupture strain on performance of FRP confined concrete

2015

Journal Article

Theoretical model for double-skinned concrete-filled-steel-tubular columns with external confinement

Dong, Chun Xiao and Ho, Johnny Ching Ming (2015). Theoretical model for double-skinned concrete-filled-steel-tubular columns with external confinement. Journal of Civil Engineering and Management, 21 (5), 666-676. doi: 10.3846/13923730.2014.893913

Theoretical model for double-skinned concrete-filled-steel-tubular columns with external confinement

2015

Journal Article

Concurrent flexural strength and ductility design of RC beams via strain-gradient-dependent concrete stress-strain curve

Chen, M. T. and Ho, J. C. M. (2015). Concurrent flexural strength and ductility design of RC beams via strain-gradient-dependent concrete stress-strain curve. Structural Design of Tall and Special Buildings, 24 (9), 629-652. doi: 10.1002/tal.1203

Concurrent flexural strength and ductility design of RC beams via strain-gradient-dependent concrete stress-strain curve

2015

Journal Article

A constitutive model for predicting the lateral strain of confined concrete

Dong, C. X., Kwan, A. K. H. and Ho, J. C. M. (2015). A constitutive model for predicting the lateral strain of confined concrete. Engineering Structures, 91, 155-166. doi: 10.1016/j.engstruct.2015.02.014

A constitutive model for predicting the lateral strain of confined concrete

2015

Journal Article

Combined strain gradient and concrete strength effects on flexural strength and ductility design of RC columns

Chen, M.T and Ho, J.C.M (2015). Combined strain gradient and concrete strength effects on flexural strength and ductility design of RC columns. Computers and Concrete, 15 (4), 607-642. doi: 10.12989/cac.2015.15.4.607

Combined strain gradient and concrete strength effects on flexural strength and ductility design of RC columns

2015

Journal Article

Effect of continuous spirals on uni-axial strength and ductility of CFST columns

Lai, M. H. and Ho, J. C. M. (2015). Effect of continuous spirals on uni-axial strength and ductility of CFST columns. Journal of Constructional Steel Research, 104, 235-249. doi: 10.1016/j.jcsr.2014.10.007

Effect of continuous spirals on uni-axial strength and ductility of CFST columns

2015

Conference Publication

Effectiveness of external confinement on the uni-axial behaviour of CFST columns

Lai, M. H. and Ho, J. C. M. (2015). Effectiveness of external confinement on the uni-axial behaviour of CFST columns. International Conference on Performance-based and Life-cycle Structural Engineering, Brisbane, QLD, Australia, 9-11 December 2015. Brisbane, QLD, Australia: School of Civil Engineering, The University of Queensland. doi: 10.14264/uql.2016.425

Effectiveness of external confinement on the uni-axial behaviour of CFST columns

2015

Conference Publication

Lateral-to-axial strain relation of confined concrete

Dong, C. X., Kwan, A. K. H. and Ho, J. C. M. (2015). Lateral-to-axial strain relation of confined concrete. 7th Biennial Conference on Advanced Composites In Construction, Cambridge, United Kingdom, 9-11 September 2015. Chesterfield, United Kingdom: NetComposites Limited.

Lateral-to-axial strain relation of confined concrete

2014

Journal Article

Curvature-relevant analysis model of eccentrically loaded circular concrete-filled steel tube columns

Ouyang, Yi and Ho, Johnny Ching Ming (2014). Curvature-relevant analysis model of eccentrically loaded circular concrete-filled steel tube columns. Magazine of Concrete Research, 66 (24), 1263-1276. doi: 10.1680/macr.14.00112

Curvature-relevant analysis model of eccentrically loaded circular concrete-filled steel tube columns

2014

Journal Article

Simplified Design Model for Uni-Axially Loaded Double-Skinned Concrete-Filled-Steel-Tubular Columns with External Confinement

Ho, J. C. M. and Dong, C. X. (2014). Simplified Design Model for Uni-Axially Loaded Double-Skinned Concrete-Filled-Steel-Tubular Columns with External Confinement. Advanced Steel Construction, 10 (2), 179-199.

Simplified Design Model for Uni-Axially Loaded Double-Skinned Concrete-Filled-Steel-Tubular Columns with External Confinement

2014

Journal Article

Confinement effect of ring-confined concrete-filled-steel-tube columns under uni-axial load

Lai, M. H. and Ho, J. C. M. (2014). Confinement effect of ring-confined concrete-filled-steel-tube columns under uni-axial load. Engineering Structures, 67, 123-141. doi: 10.1016/j.engstruct.2014.02.013

Confinement effect of ring-confined concrete-filled-steel-tube columns under uni-axial load

2014

Journal Article

Behaviour of uni-axially loaded concrete-filled-steel-tube columns confined by external rings

Lai, M. H. and Ho, J. C. M. (2014). Behaviour of uni-axially loaded concrete-filled-steel-tube columns confined by external rings. Structural Design of Tall and Special Buildings, 23 (6), 403-426. doi: 10.1002/tal.1046

Behaviour of uni-axially loaded concrete-filled-steel-tube columns confined by external rings

2014

Journal Article

Uniaxial behaviour of confined high-strength concrete-filled-steel-tube columns

Ho, J. C. M., Lai, M. H. and Luo, L. (2014). Uniaxial behaviour of confined high-strength concrete-filled-steel-tube columns. Proceedings of the Institution of Civil Engineers: Structures and Buildings, Ahead of Print (9), 1-14. doi: 10.1680/stbu.13.00004

Uniaxial behaviour of confined high-strength concrete-filled-steel-tube columns

2014

Journal Article

Improving strength, stiffness and ductility of CFDST columns by external confinement

Ho, J. C. M. and Dong, C. X. (2014). Improving strength, stiffness and ductility of CFDST columns by external confinement. Thin-Walled Structures, 75, 18-29. doi: 10.1016/j.tws.2013.10.009

Improving strength, stiffness and ductility of CFDST columns by external confinement

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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