
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
Fields of research
Qualifications
- Doctor of Philosophy, University of Hong Kong
Research interests
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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
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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
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Rheology of cement powder paste
Investigation of the dilatancy swerve in superplasticized cement powder paste and mortar
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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
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.
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.
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
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
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
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
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
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
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
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
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
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
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
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.
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
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.
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
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
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
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
Supervision
Availability
- Associate Professor Johnny Ho is:
- Available for supervision
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Available projects
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Rheology of cement powder paste/mortar and/or concrete
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Packing density model of multi-sized spheres
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Concrete-filled-steel-tube column with hybrid confinement
Supervision history
Completed supervision
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2022
Doctor Philosophy
Fire Performance of High Strength Concrete using Novel Fire Testing
Associate Advisor
Other advisors: Dr Cristian Maluk, Associate Professor Vinh Dao
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2021
Master Philosophy
The Effect of Self-Consolidating Concrete on the Shear Behaviour of Concrete Beam Elements
Associate Advisor
Other advisors: Associate Professor Liza O'Moore
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2020
Doctor Philosophy
Fillers' application in high-performance Concrete
Associate Advisor
Other advisors: Associate Professor Vinh Dao
Media
Enquiries
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