
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
2014
Journal Article
Experimental and theoretical studies of confined HSCFST columns under uni-axial compression
Lai, M. H. and Ho, J. C. M. (2014). Experimental and theoretical studies of confined HSCFST columns under uni-axial compression. Earthquake and Structures, 7 (4), 527-552. doi: 10.12989/eas.2014.7.4.527
2013
Journal Article
Strain-gradient-dependent stress-strain curve for normal-strength concrete
Ho, J. C. M. and Peng, J. (2013). Strain-gradient-dependent stress-strain curve for normal-strength concrete. Advances in Structural Engineering, 16 (11), 1911-1930. doi: 10.1260/1369-4332.16.11.1911
2013
Journal Article
Improving interface bonding of double-skinned CFST columns
Dong, Chunxiao and Ho, Johnny Ching Ming (2013). Improving interface bonding of double-skinned CFST columns. Magazine of Concrete Research, 65 (20), 1199-1211. doi: 10.1680/macr.13.00041
2013
Journal Article
Improving design limits of strength and ductility of NSC beam by considering strain gradient effect
Ho, J. C. M. and Peng, J. (2013). Improving design limits of strength and ductility of NSC beam by considering strain gradient effect. Structural Engineering and Mechanics, 47 (2), 185-207. doi: 10.12989/sem.2013.47.2.185
2013
Journal Article
Deformability design of high-performance concrete beams
Ho, Johnny Ching Ming (2013). Deformability design of high-performance concrete beams. Structural Design of Tall and Special Buildings, 22 (9), 729-748. doi: 10.1002/tal.728
2013
Journal Article
Efficiency on uni-axial compressive strength improvement by using externally confined concrete-filled steel tube columns
Ho, J. C. M. and Luo, L. (2013). Efficiency on uni-axial compressive strength improvement by using externally confined concrete-filled steel tube columns. HKIE Transactions Hong Kong Institution of Engineers, 20 (2), 96-108. doi: 10.1080/1023697X.2013.794572
2013
Journal Article
Behaviour of uni-axially loaded CFST columns confined by tie bars
Ho, J. C. M. and Lai, M. H. (2013). Behaviour of uni-axially loaded CFST columns confined by tie bars. Journal of Constructional Steel Research, 83, 37-50. doi: 10.1016/j.jcsr.2012.12.014
2013
Journal Article
Strain gradient effects on flexural strength design of normal-strength concrete beams
Ho, J. C. M. and Peng, J. (2013). Strain gradient effects on flexural strength design of normal-strength concrete beams. Structural Design of Tall and Special Buildings, 22 (1), 29-49. doi: 10.1002/tal.655
2013
Conference Publication
Uni-axial compression test of concrete-filled-steel-tube columns confined by tie bars
Lai, M. H. and Ho, J. C. M. (2013). Uni-axial compression test of concrete-filled-steel-tube columns confined by tie bars. 11th International Scientific Conference on Modern Building Materials, Structures and Techniques, MBMST 2013, Vilnius, Lithuania, 16-17 May 2013. Amsterdam, Netherlands: Elsevier. doi: 10.1016/j.proeng.2013.04.084
2012
Journal Article
Experimental Tests on High-Strength Concrete Columns Subjected to Combined Medium Axial Load and Flexure
Ho, Johnny Ching Ming (2012). Experimental Tests on High-Strength Concrete Columns Subjected to Combined Medium Axial Load and Flexure. Advances in Structural Engineering, 15 (8), 1359-1374. doi: 10.1260/1369-4332.15.8.1359
2012
Journal Article
Flexural ductility and deformability of concrete beams incorporating high-performance materials
Ho, J.C.M., Lam, J.Y.K. and Kwan, A.K.H. (2012). Flexural ductility and deformability of concrete beams incorporating high-performance materials. Structural Design of Tall and Special Buildings, 21 (2), 114-132. doi: 10.1002/tal.579
2012
Journal Article
Strain gradient effects on concrete stress–strain curve
Peng, Jun and Ho, Johnny Ching Ming (2012). Strain gradient effects on concrete stress–strain curve. Proceedings of the Institution of Civil Engineers: Structures and Buildings, 165 (SB10), 543-565. doi: 10.1680/stbu.10.00056
2012
Journal Article
Equivalent stress block for normal-strength concrete incorporating strain gradient effect
Peng, Jun, Ho, Johnny Ching Ming, Pam, Hoat Joen and Wong, Yuk Lung (2012). Equivalent stress block for normal-strength concrete incorporating strain gradient effect. Magazine of Concrete Research, 64 (1), 1-19. doi: 10.1680/macr.2012.64.1.1
2012
Journal Article
Uni-axial behaviour of normal-strength CFDST columns with external steel rings
Dong, C.X. and Ho, J.C.M. (2012). Uni-axial behaviour of normal-strength CFDST columns with external steel rings. Steel and Composite Structures, 13 (6), 587-606. doi: 10.12989/scs.2012.13.6.587
2012
Journal Article
Uni-axial behaviour of normal-strength concrete-filledsteel-tube columns with external confinement
Ho, J.C.M. and Luo, L. (2012). Uni-axial behaviour of normal-strength concrete-filledsteel-tube columns with external confinement. Earthquake and Structures, 3 (6), 889-910.
2011
Journal Article
Concurrent flexural strength and deformability design of high-performance concrete beams
Ho, J.C.M. and Zhoua, K.J.H. (2011). Concurrent flexural strength and deformability design of high-performance concrete beams. Structural Engineering and Mechanics, 40 (4), 541-562.
2011
Journal Article
Limited deformability design of high-strength concrete beams in low to moderate seismicity regions
Ho, Johnny Ching-Ming and Zhou, Kevin Jian-Hui (2011). Limited deformability design of high-strength concrete beams in low to moderate seismicity regions. Journal of Civil Engineering and Management, 17 (3), 409-423. doi: 10.3846/13923730.2011.594219
2011
Journal Article
Inelastic design of high-axially loaded concrete columns in moderate seismicity regions
Ho, J.C.M. (2011). Inelastic design of high-axially loaded concrete columns in moderate seismicity regions. Structural Engineering and Mechanics, 39 (4), 559-578.
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
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
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