
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
2021
Journal Article
Mechanical properties of high strength POM-FRCC and its performance under elevated temperatures
He, Jianqiang, Wang, Qing, Yao, Boyu and Ho, Johnny (2021). Mechanical properties of high strength POM-FRCC and its performance under elevated temperatures. Construction and Building Materials, 290 123177, 1-15. doi: 10.1016/j.conbuildmat.2021.123177
2021
Journal Article
Uni-axial behaviour of expansive CFST and DSCFST stub columns
Ho, J. C. M., Ou, X. L., Li, C. W., Song, W., Wang, Q. and Lai, M. H. (2021). Uni-axial behaviour of expansive CFST and DSCFST stub columns. Engineering Structures, 237 112193, 112193. doi: 10.1016/j.engstruct.2021.112193
2021
Journal Article
Shrinkage design model of concrete incorporating wet packing density
Lai, M. H., Binhowimal, S. A.M., Griffith, A. M., Hanzic, L., Wang, Qing, Chen, Zhouyi and Ho, J. C.M. (2021). Shrinkage design model of concrete incorporating wet packing density. Construction and Building Materials, 280 122448, 122448. doi: 10.1016/j.conbuildmat.2021.122448
2021
Journal Article
Improving mechanical behavior and microstructure of concrete by using BOF steel slag aggregate
Lai, M. H., Zou, Jiajun, Yao, Boyu, Ho, J. C. M., Zhuang, Xin and Wang, Qing (2021). Improving mechanical behavior and microstructure of concrete by using BOF steel slag aggregate. Construction and Building Materials, 277 122269, 122269. doi: 10.1016/j.conbuildmat.2021.122269
2021
Journal Article
Interdependence of passing ability, dilatancy and wet packing density of concrete
Lai, M. H., Griffith, A. M., Hanzic, L., Wang, Qing and Ho, J. C.M. (2021). Interdependence of passing ability, dilatancy and wet packing density of concrete. Construction and Building Materials, 270 121440, 121440. doi: 10.1016/j.conbuildmat.2020.121440
2020
Journal Article
Fatigue behaviour of composite sandwich beams strengthened with GFRP stiffeners
Wang, L., Zhang, Y. W., Ho, J. C. M. and Lai, M. H. (2020). Fatigue behaviour of composite sandwich beams strengthened with GFRP stiffeners. Engineering Structures, 214 110596. doi: 10.1016/j.engstruct.2020.110596
2020
Journal Article
Greener engineered cementitious composite (ECC) - The use of pozzolanic fillers and unoiled PVA fibers
Wang, Qing, Lai, M. H., Zhang, J., Wang, Zhenbo and Ho, J. C. M. (2020). Greener engineered cementitious composite (ECC) - The use of pozzolanic fillers and unoiled PVA fibers. Construction and Building Materials, 247 118211, 118211. doi: 10.1016/j.conbuildmat.2020.118211
2020
Journal Article
Behaviour of FRP tube-concrete-encased steel composite columns
Ren, F. M., Liang, Y. W., Ho, J. C. M. and Lai, M. H. (2020). Behaviour of FRP tube-concrete-encased steel composite columns. Composite Structures, 241 112139. doi: 10.1016/j.compstruct.2020.112139
2020
Journal Article
A path dependent stress-strain model for concrete-filled-steel-tube column
Lai, M. H., Song, W., Ou, X. L., Chen, M. T., Wang, Q. and Ho, J. C. M. (2020). A path dependent stress-strain model for concrete-filled-steel-tube column. Engineering Structures, 211 110312. doi: 10.1016/j.engstruct.2020.110312
2020
Journal Article
A path dependent constitutive model for CFFT column
Ho, J. C. M., Ou, X. L., Chen, M. T., Wang, Q. and Lai, M. H. (2020). A path dependent constitutive model for CFFT column. Engineering Structures, 210 110367. doi: 10.1016/j.engstruct.2020.110367
2020
Journal Article
Cause and mitigation of dilatancy in cement powder paste
Lai, M. H., Binhowimal, S. A.M., Hanzic, L., Wang, Q. and Ho, J. C.M. (2020). Cause and mitigation of dilatancy in cement powder paste. Construction and Building Materials, 236 117595, 117595. doi: 10.1016/j.conbuildmat.2019.117595
2020
Journal Article
Experimental investigation on hollow-steel-tube columns with external confinements
Lai, Mianheng, Li, Chengwei, Ho, Johnny Ching Ming and Chen, Man-Tai (2020). Experimental investigation on hollow-steel-tube columns with external confinements. Journal of Constructional Steel Research, 166 105865. doi: 10.1016/j.jcsr.2019.105865
2020
Journal Article
Zeolite to improve strength-shrinkage performance of high-strength engineered cementitious composite
Wang, Qing, Zhang, Jun and Ho, J. C. M. (2020). Zeolite to improve strength-shrinkage performance of high-strength engineered cementitious composite. Construction and Building Materials, 234 117335, 117335. doi: 10.1016/j.conbuildmat.2019.117335
2020
Journal Article
A stress-path dependent stress-strain model for FRP-confined concrete
Lai, M. H., Liang, Y. W., Wang, Q., Ren, F. M., Chen, M. T. and Ho, J. C. M. (2020). A stress-path dependent stress-strain model for FRP-confined concrete. Engineering Structures, 203 109824. doi: 10.1016/j.engstruct.2019.109824
2020
Journal Article
Dilatancy mitigation of cement powder paste by pozzolanic and inert fillers
Lai, M. H., Binhowimal, S. A. M., Hanzic, L., Wang, Q. and Ho, J. C. M. (2020). Dilatancy mitigation of cement powder paste by pozzolanic and inert fillers. Structural Concrete, 21 (3) suco.201900320, 1164-1180. doi: 10.1002/suco.201900320
2020
Conference Publication
Preface
Wang, Chien Ming, Kitipornchai, Sritawat and Ho, Johnny C. M. (2020). Preface. 25th Australasian Conference on Mechanics of Structures and Materials, Brisbane, QLD, Australia, December 2018. Singapore: Springer. doi: 10.1007/978-981-13-7603-0
2020
Conference Publication
Expereimental uni-axial behaviour of UHSCFST columns with external confinement
Lai, M. H. and Ho, J. C.M. (2020). Expereimental uni-axial behaviour of UHSCFST columns with external confinement. ACMSM25, Brisbane, Australia, 4-7 December, 2018. Singapore: Springer. doi: 10.1007/978-981-13-7603-0_68
2019
Journal Article
Uni-axial behaviour of externally confined UHSCFST columns
Lai, M. H., Chen, M. T., Ren, F. M. and Ho, J. C. M. (2019). Uni-axial behaviour of externally confined UHSCFST columns. Thin-Walled Structures, 142, 19-36. doi: 10.1016/j.tws.2019.04.047
2019
Journal Article
Fillers to improve passing ability of concrete
Lai, Mianheng, Hanzic, Lucija and Ho, Johnny C. M. (2019). Fillers to improve passing ability of concrete. Structural Concrete, 20 (1), 185-197. doi: 10.1002/suco.201800047
2019
Conference Publication
The use of low-carbon-footprint filler in highperformance concrete
Binhowimal, S. A. M., Ho, J. C. M. and Dao, Vinh T.N. (2019). The use of low-carbon-footprint filler in highperformance concrete. The International Federation for Structural Concrete 5th International FIB Congress FIB 2018 Better Smarter Stronger, Melbourne, VIC Australia, 7-11 October 2018. Lausanne, Switzerland: Federation Internationale du Beton (fib).
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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