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吕天启 , 赵国藩 , 林志伸 . 高温后静置混凝土力学性能试验研究 [J ] . 建筑结构学报 , 2004 , 25 ( 1 ): 63 - 70 .

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文彦博 , 黄瑞源 , 李平 , 等 . 高温高应变率下混凝土材料的损伤演化方程 [J ] . 高压物理学报 , 2021 , 35 ( 2 ): 54 - 63 .

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WANG W , ZHANG Z H , HUO Q , et al. Dynamic compressive mechanical properties of UR50 ultra-early-strength cement-based concrete material under high strain rate on SHPB test [J ] . Materials , 2022 , 15 ( 17 ): 6154 . DOI: 10.3390/ma15176154 http://doi.org/10.3390/ma15176154 https://www.mdpi.com/1996-1944/15/17/6154 https://www.mdpi.com/1996-1944/15/17/6154 UR50 ultra-early-strength cement-based self-compacting high-strength material is a special cement-based material. Compared with traditional high-strength concrete, its ultra-high strength, ultra-high toughness, ultra-impact resistance, and ultra-high durability have received great attention in the field of protection engineering, but the dynamic mechanical properties of impact compression at high strain rates are not well known, and the dynamic compressive properties of materials are the basis for related numerical simulation studies. In order to study its dynamic compressive mechanical properties, three sets of specimens with a size of Φ100 × 50 mm were designed and produced, and a large-diameter split Hopkinson pressure bar (SHPB) with a diameter of 100 mm was used to carry out impact tests at different speeds. The specimens were mainly brittle failures. With the increase in impact speed, the failure mode of the specimens gradually transits from larger fragments to small fragments and a large amount of powder. The experimental results show that the ultra-early-strength cement-based material has a greater impact compression brittleness, and overall rupture occurs at low strain rates. Its dynamic compressive strength increases with the increase of strain rates and has an obvious strain rate strengthening effect. According to the test results, the relationship curve between the dynamic enhancement factor and the strain rate is fitted. As the impact speed increases, the peak stress rises, the energy absorption density increases, and its growth rate accelerates. Afterward, based on the stress–strain curve, the damage variables under different strain rates were fitted, and the results show that the increase of strain rate has a hindering effect on the increase of damage variables and the increase rate.

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李胜林 , 刘殿书 , 李祥龙 , 等 . Ф75mm分离式霍普金森压杆试件长度效应的试验研究 [J ] . 中国矿业大学学报 , 2010 , 39 ( 1 ): 93 - 97 .

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LU Y B , LI Q M . Appraisal of pulse-shaping technique in split Hopkinson pressure bar tests for brittle materials [J ] . International Journal of Protective Structures , 2010 , 1 ( 3 ): 363 - 390 . DOI: 10.1260/2041-4196.1.3.363 http://doi.org/10.1260/2041-4196.1.3.363 http://journals.sagepub.com/doi/10.1260/2041-4196.1.3.363 http://journals.sagepub.com/doi/10.1260/2041-4196.1.3.363 Split Hopkinson pressure bar (SHPB) technique has been frequently used to measure the uniaxial compressive stress–strain relation of brittle materials at intermediate strain-rates where pulse-shaping technique is employed to improve the stress uniformity and maintain a nearly constant strain-rate in the specimen during the effective loading period. This paper appraises the functions of the pulse-shaping technique in SHPB tests of brittle samples based on numerical simulations of SHPB tests. It is shown that a proper pulse-shaper can attenuate high frequency oscillations of the incident pulse and increase the rise-time of the pulse, resulting in the improvement of stress equilibrium and uniformity along the axial direction of an SHPB specimen. However, it is found that the inertia-induced confinement in the radial direction of a brittle specimen is still significant even though the shaped incident stress pulse can generate a nearly flat plateau in the reflected pulse in the SHPB test. It implies that the achievement of a nearly constant strain-rate represented by a nearly flat plateau in the reflected pulse in an SHPB test may not give a true nearly constant strain-rate in the SHPB specimen. It is concluded that the application of the pulse-shaping technique in SHPB tests on brittle materials may not change the nature of the observed transition strain-rate, which represents the transition of the stress state from a uniaxial-compressive-stress-dominated state to a confined compressive stress state, rather than the start of significant strain-rate effect. Therefore, inertia-induced radial confinement effect needs to be considered in the interpretation of any SHPB results for brittle materials even though a pulse-shaper is used.

胡亮亮 , 黄瑞源 , 高光发 , 等 . 混凝土类材料SHPB实验中确定应变率的方法 [J ] . 爆炸与冲击 , 2019 , 39 ( 6 ): 43 - 51 .

HU L L , HUANG R Y , GAO G F , et al. A novel method for determining strain rate of concrete-like materials in SHPB experiment [J ] . Explosion and Shock Waves , 2019 , 39 ( 6 ): 43 - 51 . (in Chinese) DOI: 10.1023/A:1022145201911 http://doi.org/10.1023/A:1022145201911 http://link.springer.com/10.1023/A:1022145201911 http://link.springer.com/10.1023/A:1022145201911

刘普 , 王明华 , 李庆涛 . 高温后路缘石再生骨料混凝土的力学性能 [J ] . 建筑材料学报 , 2022 , 25 ( 12 ): 1233 - 1240 .

LIU P , WANG M H , LI Q T . Mechanical properties of curb recycled aggregate concrete after high temperature [J ] . Journal of Building Materials , 2022 , 25 ( 12 ): 1233 - 1240 . (in Chinese)

MA Q , GUO R , ZHAO Z , et al. Mechanical properties of concrete at high temperature-a review [J ] . Construction and Building Materials , 2015 , 93 : 371 - 383 . DOI: 10.1016/j.conbuildmat.2015.05.131 http://doi.org/10.1016/j.conbuildmat.2015.05.131 https://linkinghub.elsevier.com/retrieve/pii/S0950061815006765 https://linkinghub.elsevier.com/retrieve/pii/S0950061815006765