
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
2011
Conference Publication
Uni-axial behavior of concrete-filled steel tubular columns with external confinement
Luo, L. and Ho, J. C.M. (2011). Uni-axial behavior of concrete-filled steel tubular columns with external confinement. Faculty of Construction and Land Use the Hong Kong Polytechnic University.
2011
Conference Publication
Concrete stress profile developed in flexural RC members
Peng, J. and Ho, J. C.M. (2011). Concrete stress profile developed in flexural RC members. Faculty of Construction and Land Use the Hong Kong Polytechnic University.
2011
Journal Article
Minimum deformability design of high-strength concrete beams in non-seismic regions
Ho, J.C.M. and Zhou, K.J.H. (2011). Minimum deformability design of high-strength concrete beams in non-seismic regions. Computers and Concrete, 8 (4), 445-463. doi: 10.12989/cac.2011.8.4.445
2011
Journal Article
Limited ductility design of reinforced concrete columns for tall buildings in low to moderate seismicity regions
Ho, Johnny Ching Ming (2011). Limited ductility design of reinforced concrete columns for tall buildings in low to moderate seismicity regions. Structural Design of Tall and Special Buildings, 20 (1), 102-120. doi: 10.1002/tal.610
2011
Conference Publication
Flexural strength and deformability design of reinforced concrete beams
Zhou, K. J. H., Ho, J. C. M. and Su, R. K. L. (2011). Flexural strength and deformability design of reinforced concrete beams. 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12, Hong Kong, Hong Kong, 26-28 January 2011. Amsterdam, The Netherlands: Elsevier BV. doi: 10.1016/j.proeng.2011.07.176
2011
Journal Article
Strain gradient effects on flexural strength design of normal-strength concrete columns
Ho, J.C.M. and Peng, J. (2011). Strain gradient effects on flexural strength design of normal-strength concrete columns. Engineering Structures, 33 (1), 18-31. doi: 10.1016/j.engstruct.2010.09.014
2011
Journal Article
Typical collapse modes of confined masonry buildings under strong earthquake loads
Su, R.K.L., Lee, Y.Y., Lee, C.L. and Ho, J.C.M. (2011). Typical collapse modes of confined masonry buildings under strong earthquake loads. Open Construction and Building Technology Journal, 5 (Spec. Issue 1), 50-60. doi: 10.2174/1874836801105010050
2010
Journal Article
Deformability evaluation of high-strength reinforced concrete columns
Ho, J. C. M. and Pam, H. J. (2010). Deformability evaluation of high-strength reinforced concrete columns. Magazine of Concrete Research, 62 (8), 569-583. doi: 10.1680/macr.2010.62.8.569
2010
Journal Article
Ductility design of high-strength concrete beams and columns
Kwan, A. K. H. and Ho, J. C. M. (2010). Ductility design of high-strength concrete beams and columns. Advances in Structural Engineering, 13 (4), 651-664. doi: 10.1260/1369-4332.13.4.651
2010
Journal Article
Effects of steel lap splice locations on strength and ductility of reinforced concrete columns
Pam, H. J. and Ho, J. C. M. (2010). Effects of steel lap splice locations on strength and ductility of reinforced concrete columns. Advances in Structural Engineering, 13 (1), 199-214. doi: 10.1260/1369-4332.13.1.199
2010
Journal Article
Normalised rotation capacity for deformability evaluation of high-performance concrete beams
Zhou, K. J. H., Ho, J. C. M. and Su, R. K. L. (2010). Normalised rotation capacity for deformability evaluation of high-performance concrete beams. Earthquake and Structures, 1 (3), 269-287.
2010
Journal Article
Effectiveness of adding confinement for ductility improvement of high-strength concrete columns
Ho, J. C. M., Lam, J. Y. K. and Kwan, A. K. H. (2010). Effectiveness of adding confinement for ductility improvement of high-strength concrete columns. Engineering Structures, 32 (3), 714-725. doi: 10.1016/j.engstruct.2009.11.017
2010
Conference Publication
Interrelation of axial load level and confining pressure for minimum ductility design of concrete columns
Ho, J. C. M. (2010). Interrelation of axial load level and confining pressure for minimum ductility design of concrete columns. 9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium, Toronto, ON, 25 - 29 July 2010. Oakland, CA United States: Earthquake Engineering Research Institute.
2009
Journal Article
Maximum axial load level and minimum confinement for limited ductility design of high-strength concrete columns
Lam, J. Y. K., Ho, J. C. M. and Kwan, A. K. H. (2009). Maximum axial load level and minimum confinement for limited ductility design of high-strength concrete columns. Computers and Concrete, 6 (5), 357-376. doi: 10.12989/cac.2009.6.5.357
2009
Journal Article
Flexural ductility of high-strength concrete columns with minimal confinement
Lam, J. Y. K., Ho, J. C. M. and Kwan, A. K. H. (2009). Flexural ductility of high-strength concrete columns with minimal confinement. Materials and Structures, 42 (7), 909-921. doi: 10.1617/s11527-008-9431-5
2009
Journal Article
Minimum flexural ductility design of high-strength concrete columns
Lam, Jeffery Y. K., Ho, Johnny C. M. and Kwan, Albert K. H. (2009). Minimum flexural ductility design of high-strength concrete columns. HKIE Transactions, 16 (4), 2-9. doi: 10.1080/1023697X.2009.10668169
2009
Journal Article
Length of critical region for confinement steel in limited ductility high-strength reinforced concrete columns
Pam, H. J. and Ho, J. C. M. (2009). Length of critical region for confinement steel in limited ductility high-strength reinforced concrete columns. Engineering Structures, 31 (12), 2896-2908. doi: 10.1016/j.engstruct.2009.07.015
2008
Journal Article
An overview of research at HKU on HSRC columns and beam-column joints for low-medium seismic-risked regions
Pam, H. J., Ho, J. C.M. and Li, J. (2008). An overview of research at HKU on HSRC columns and beam-column joints for low-medium seismic-risked regions. Electronic Journal of Structural Engineering, 8, 88-98.
2005
Journal Article
Effects of strain hardening of steel reinforcement on flexural strength and ductility of concrete beams
Ho J.C.M., Au F.T.K. and Kwan A.K.H. (2005). Effects of strain hardening of steel reinforcement on flexural strength and ductility of concrete beams. Structural Engineering and Mechanics, 19 (2), 185-198.
2004
Journal Article
Effects of concrete grade and steel yield strength on flexural ductility of reinforced concrete beams
Kwan, A. K. H., Ho, J. C. M. and Pam, H. J. (2004). Effects of concrete grade and steel yield strength on flexural ductility of reinforced concrete beams. Australian Journal of Structural Engineering, 5 (2), 1-20. doi: 10.1080/13287982.2004.11464932
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
-
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
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