Aug 2026· Journal of the Croatian Association of Civil Engineers· Vol 78, pp. 391-405· 0 citations· 30 references
Abstract
High-strength concrete (HSC) is widely utilised in impact-resistant and blast-protective structures owing to its superior strength. However, its dynamic mechanical response and cumulative damage evolution under single and repeated impact loading require further clarification, particularly regarding impact pulse duration and strain rate effects. This study investigates the influence of strain rate and striker length on the dynamic mechanical behaviour and damage evolution of C80 HSC. A Ø75 mm split Hopkinson pressure bar system was used to conduct single- and repeated-impact tests at different impact velocities, with 400 mm, 600 mm, and 800 mm strikers. Ultrasonic pulse velocity measurements evaluated damage evolution during repeated impacts, revealing that the fragmentation of the failure modes of C80 HSC intensified with increasing strain rates. The dynamic compressive strength and maximum strain increased with the strain rate, whereas the dynamic elastic modulus remained relatively stable within a certain range. Increasing the striker length prolonged the pulse duration while increasing peak stress and the elastic modulus.
Blasting operations during open-pit mining can cause cumulative degradation of slope stability, increasing the likelihood of slope failures. This study investigates the dynamic behaviour and crack-propagation characteristics of rock masses in steep open-pit slopes under impact loading. Magnetite specimens from an open-...
Qing-Fu Zeng, Jun-Hui Cai, Wan-Zhong Zhang et al.· Archives of Mining Sciences· 0 citations
The dynamic mechanical properties of rubber concrete reinforced with polyvinyl alcohol (PVA) micro-fibres under the combined effects of high temperature, corrosive solutions and impact loading were investigated using split Hopkinson pressure bar tests and scanning electron microscopy (SEM) analysis. The results show th...
Yu-Qing Hu, Qi Zhu, Jian-Yong Pang et al.· Advances in Cement Research· 0 citations
Conventional cement concrete has difficulty simultaneously achieving relatively high strength, large deformation capacity, and satisfactory post-cracking damage resistance, which limits its further use in demanding pavement applications. This study comprehensively evaluates the strength development, deformation capacit...
Zhi-Xiang Wang, Zhi-Jian Yi, Ya Li et al.· Buildings· 0 citations
This study investigates the residual performance of concrete after repeated cryogenic thermal shock and evaluates how water-to-binder (W/B) ratio, binder content, and fly ash replacement influence damage development. Seven concrete mixtures were tested at 28 days after up to three 1-hour liquid-nitrogen immersion cycle...
A. Abdulmatin, P. Sanit-in, Pitchayut Sanguthai et al.· Civil Engineering Journal· 0 citations
Accidental detonation under mechanical loading highlights the importance of understanding the dynamic damage behaviour of polymer‐bonded explosives (PBXs). For aluminium‐containing PBXs, systematic characterization of strain‐rate‐dependent and time‐dependent responses remains limited. In this study, the compressive b...
