WHY WE ARE EXPERTS

Publications

Yong, A.C.Y., Lam, N.T.K. & Menegon, S.J. (2022) CRC Press

This textbook covers the collision of a moving, falling or flying object on a rigid barrier or a structural element, and the transmission of the transient action to the rest of the structural system. It is the only up-to-date book on this under-researched topic that confronts engineers on a day-to-day basis.

The book deals with a range of real-life engineering problems and focuses on the application of knowledge and skillsets from structural analysis and structural dynamics. Fundamental principles and concepts on structural collision are first introduced, followed by their specific applications such as vehicular collision on bridge structures, boulder impact on rockfall barriers and collision by hail and windborne debris. Analytical solutions provided are in the form of closed-form expressions, which can be directly adopted in conventional manual calculations. The use of spreadsheets to simulate the dynamic response behaviour is also covered.

  • The only standalone book covering the topic from a civil engineering perspective
  • Practical guidance on real-life engineering problems, and use of computational and physical methods
  • Conveys methodology validated experimentally

The book provides an excellent guide for practitioners and sets out fundamental principles for graduate students in civil, structural and mechanical engineering.

For those who have purchased the book, feel free to direct any questions/feedback/comments to us via the following link: Google Form

Journal and Conference Articles

Title Year
Indentation modelling of aluminium cladding panels subjected to hailstone impact
S Shi, N Lam, Y Cui, G Lu, E Gad, L Zhang
International Journal of Impact Engineering, 104638
2023
An analytical approach for modelling contact forcing function of hailstone impact
S Shi, N Lam, S Chen, Y Cui, G Lu, E Gad, L Zhang
International Journal of Solids and Structures 269, 112214
2023
Steel Baffles as a Rockfall Protection Measure for Mountainous Urban Settings
JS Perera, N Lam
Geosciences 13 (3), 93
2023
Rockfall protection wall that can withstand multiple strikes without needing to be repaired
JS Perera, N Lam
International Journal of Impact Engineering 173, 104476
2023
Indentation into an aluminium panel by the impact of a rigid spherical object
S Shi, N Lam, Y Cui, L Zhang, G Lu, E Gad
Thin-Walled Structures 180, 109935
2023
Collision Actions on Structures (1st ed.)
Yong, A.C.Y., Lam, N.T.K., & Menegon, S.J. (2022)
CRC Press
2022
Soil-Embedded Steel Baffle with Concrete Footing Responding to Collision by a Fallen or Flying Object
JS Perera, N Lam
International Journal of Geomechanics 22 (3), 04021311
2022
Experimental and Analytical Investigation of a RC Wall with a Gabion Cushion Subjected to Boulder Impact
JS Perera, N Lam, MM Disfani, E Gad
International Journal of Impact Engineering 151, 103823
2021
Predictions of localised damage to concrete caused by a low-velocity impact
ZZA Majeed, NTK Lam, EF Gad
International Journal of Impact Engineering 149, 103799
2021
Closed-form expressions for improved impact resistant design of reinforced concrete beams
ACY Yong, NTK Lam, SJ Menegon
Structures 29, 1828-1836
2021
Cantilevered RC wall subjected to combined static and impact actions
ACY Yong, NTK Lam, SJ Menegon, EF Gad
International Journal of Impact Engineering 143, 103596
2020
Experimental and Analytical Assessment of Flexural Behavior of Cantilevered RC Walls Subjected to Impact Actions
ACY Yong, NTK Lam, SJ Menegon, EF Gad
Journal of Structural Engineering 146 (4), 04020034
2020
Large Scale Experimental Investigation of a Reinforced Concrete Rockfall Protection Wall with a Gabion Cushion Cover
J Perera, ACY Yong, ZZ Abdul Majeed, N Lam
8th International Conference on Advances in Experimental Structural Engineering
2020
Impact Response Behaviour of Gabion Cells Filled with Different Cushion Materials
JS Perera, NTK Lam, MM Disfani, E Gad
ACMSM25, 539-548
2020
Pendulum Impact Test on a Reinforced Concrete Wall
ACY Yong, JS Perera, ZZA Majeed, NTK Lam, SJ Menegon, E Gad
ACMSM25, 549-556
2020
Contact Force Generated by Impact of Boulder on Concrete Barriers
ZZA Majeed, ACY Yong, JS Perera, NTK Lam, SJ Menegon, E Gad
ACMSM25, 511-518
2020
Contact force generated by impact of boulder on concrete surface
ZZA Majeed, NTK Lam, C Lam, E Gad, JSH Kwan
International journal of impact engineering 132, 103324
2019
Analytical solution for estimating sliding displacement of rigid barriers subjected to boulder impact
ACY Yong, C Lam, NTK Lam, JS Perera, JSH Kwan
Journal of Engineering Mechanics 145 (3), 04019006
2019
Determination of contact force by compression testing of cylindrical specimens
ZZA Majeed, NTK Lam, C Lam, E Gad, JSH Kwan
MethodsX 6, 1957-1966
2019
A note on Hunt and Crossley model with generalized visco-elastic damping
J Sun, N Lam, L Zhang, D Ruan, E Gad
International Journal of Impact Engineering 121, 151-156
2018
Probabilistic modelling of Hertzian fracture of glass by flying objects impact in bad weather
M Pathirana, N Lam, S Perera, L Zhang, D Ruan, E Gad
International Journal of Impact Engineering 118, 11-23
2018
Overturning stability of L-shaped rigid barriers subjected to rockfall impacts
C Lam, ACY Yong, JSH Kwan, NTK Lam
Landslides 15 (7), 1347-1357
2018
Probabilistic modelling of forces of hail
S Perera, N Lam, M Pathirana, L Zhang, D Ruan, E Gad
Natural hazards 91 (1), 133-153
2018
Displacement-based approach for the assessment of overturning stability of rectangular rigid barriers subjected to point impact
NTK Lam, ACY Yong, C Lam, JSH Kwan, JS Perera, MM Disfani, E Gad
Journal of Engineering Mechanics 144 (2), 04017161
2018
High strength structural glass for walk-on photovoltaic modules
M Pathirana, N Lam, S Perera, L Zhang, E Gad, L Aye
ZEMCH Network
2018
Flexural response of reinforced concrete barriers subject to boulder impact
NTK Lam, ACY Yong, JS Perera, JSH Kwan, HWK Lam, LA Wong
Proceedings of ISSMGE Second JTC1 Workshop-Triggering and Propagation of …
2018
Risks of failure of annealed glass panels subject to point contact actions
M Pathirana, N Lam, S Perera, L Zhang, D Ruan, E Gad
International Journal of Solids and Structures 129, 177-194
2017
Use of static tests for predicting damage to cladding panels caused by storm debris
S Perera, N Lam, M Pathirana, L Zhang, D Ruan, E Gad
Journal of Building Engineering 12, 109-117
2017
Damage modelling of aluminium panels impacted by windborne debris
M Pathirana, N Lam, S Perera, L Zhang, D Ruan, E Gad
Journal of Wind Engineering and Industrial Aerodynamics 165, 1-12
2017
Economical Design For Impact Actions On Bridge Structures
A Yong, N Lam, MM Disfani, E Gad
Austroads Bridge Conference, 10th, 2017, Melbourne, Victoria, Australia
2017
Computer simulation of contact forces generated by impact
J Sun, N Lam, L Zhang, D Ruan, E Gad
International Journal of Structural Stability and Dynamics 17 (01), 1750005
2017
Deterministic solutions for contact force generated by impact of windborne debris
S Perera, N Lam, M Pathirana, L Zhang, D Ruan, E Gad
International Journal of Impact Engineering 91, 126-141
2016
Prediction of damage to building envelopes caused by storm debris
S Perera, N Lam, M Pathirana, L Zhang, D Ruan, E Gad
Proceedings of the Australian Structural Engineering Conference, Brisbane …
2016
Impact actions on rockfall protection barrier‖
A Yong, N Lam, MM Disfani, E Gad
Procs. Australasian Structural Engineering Conference
2016
The estimation of impact forces based on first principles
N Lam, E Gad
Australasian Structural Engineering Conference: ASEC 2016, 350-356
2016
Contact forces generated by hailstone impact
J Sun, N Lam, L Zhang, D Ruan, E Gad
International Journal of Impact Engineering 84, 145-158
2015
An innovative procedure for estimating contact force during impact
Y Yang, J Sun, N Lam, L Zhang, E Gad
International Journal of Applied Mechanics 6 (06), 1450079
2014
Contact forces generated by fallen debris
J Sun, N Lam, L Zhang, E Gad, D Ruan
Structural Engineering and Mechanics 50 (5), 589-603
2014
Simple hand calculation method for estimating deflection generated by the low velocity impact of a solid object
M Ali, J Sun, N Lam, L Zhang, E Gad
Australian Journal of Structural Engineering 15 (3), 243-259
2014
Simplified analysis of low velocity impact actions on shallow domes
Y Yang, N Lam, L Zhang, E Gad
International Journal of Applied Mechanics 5 (02), 1350013
2013
Fundamentals of impact actions demonstrated by miniature experimentations
M Ali, J Sun, N Lam, L Zhang, E Gad
2013
Estimation of impact force generated by storm debris
N Lam, E Gad, J Sun, D Ruan, LH Zhang
Shock Impact Struct 397, e406
2013
Estimation of response of plate structure subject to low veloctiy impact by a solid object
Y Yang, NTK Lam, L Zhang
International journal of structural stability and dynamics 12 (06), 1250053
2012
Estimation of dynamic response of structural elements subject to blast and impact actions using a simple unified approach
Y Yang, R Lumantama, NTK Lam, L Zhang, P Mendis
The IES Journal Part A: Civil & Structural Engineering 5 (2), 117-127
2012
Evaluation of simplified methods of estimating beam responses to impact
Y Yang, NTK Lam, L Zhang
International Journal of Structural Stability and Dynamics 12 (03), 1250016
2012
Impact resistance of annealed glass panels
NTK Lam, EF Gad, I Nurhuda, I Calderone
Journal of performance of constructed facilities 25 (5), 422-432
2011
Impact resistant behaviour of lightweight structural elements
M Ali, N Lam, L Zhang, E Gad
International Journal of Aerospace and Lightweight Structures (IJALS) 1 (2)
2011