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学者姓名：杨晓强
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Abstract ：
Repeated loading and unloading tests were carried out on concrete under different confining pressures and strain rates to characterize the damage using the decrease in elastic modulus, and a damage evolution equation considering the effects of confining pressure and strain rate was established. At the same time, the yield criterion and equation of state of the Holmquist-Johnson-Cook (HJC) model were modified by combining the experimental data of high confining pressure. The modified model was validated by performing single -element numerical simulations for different stress states. Then, experiments were carried out on the penetration of tungsten alloy projectiles into concrete slabs, with penetration velocities ranging from 172 m/s to 302 m/s. The depth of penetration and crater area were obtained. Numerical simulations were subsequently carried out using the proposed model. The results showed that this model can describe the behaviour of concrete under dynamic loading. Finally, the damage evolution mechanism of concrete during the penetration process is analysed in conjunction with the proposed damage evolution equation.
Keyword ：
Concrete Concrete Constitutive model Constitutive model Mechanical properties Mechanical properties Numerical simulation Numerical simulation Projectile Projectile
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| GB/T 7714 | Huang, Ruiyuan , Wen, Yanbo , Li, Yi et al. Application of concrete damage evolution equation considering confining pressure and strain rate effects in projectile penetration [J]. | ENGINEERING FAILURE ANALYSIS , 2024 , 158 . |
| MLA | Huang, Ruiyuan et al. "Application of concrete damage evolution equation considering confining pressure and strain rate effects in projectile penetration" . | ENGINEERING FAILURE ANALYSIS 158 (2024) . |
| APA | Huang, Ruiyuan , Wen, Yanbo , Li, Yi , Zhou, Hao , Yang, Xiaoqiang , Qin, Jian et al. Application of concrete damage evolution equation considering confining pressure and strain rate effects in projectile penetration . | ENGINEERING FAILURE ANALYSIS , 2024 , 158 . |
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Headed studs are key connectors to transfer the interfacial shear force between the steel and concrete component in steel ultra-high performance concrete (UHPC) composite structures. This paper presented a systematic study on the shear behavior of headed studs embedded in UHPC. A total of 30 push-out tests, categorized into 10 groups, were conducted to investigate the effects of length-to-diameter ratio of stud, fiber content, compressive strength of concrete, and diameter of studs. The load-slip curve, shear strength, shear stiffness, and ductility of studs were analyzed. The test results showed that: (i) the shear strength and stiffness of studs embedded in UHPC were higher than those in normal concrete (NC), while the ductility was lower; (ii) the shear strength increased with increasing diameter of studs; and (iii) the length-to-diameter ratio of studs (3.75-10.0) and fiber content (0%-2%) had a limited effect on the shear strength and stiffness. Results from the tests were used to evaluate the existing design methods, which were found to be relatively conservative for estimating the shear strength of headed studs embedded in UHPC. New equations were then proposed to estimate the load-slip curve and shear strength of headed studs embedded in UHPC.
Keyword ：
Headed studs Headed studs Load-slip curve Load-slip curve Push-out tests Push-out tests Shear stiffness Shear stiffness Shear strength Shear strength UHPC UHPC
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| GB/T 7714 | Lai, Zhichao , Weng, Xiangyu , Yang, Xiaoqiang et al. Shear behavior and design of headed studs embedded in steel-UHPC composite structures [J]. | STRUCTURES , 2024 , 59 . |
| MLA | Lai, Zhichao et al. "Shear behavior and design of headed studs embedded in steel-UHPC composite structures" . | STRUCTURES 59 (2024) . |
| APA | Lai, Zhichao , Weng, Xiangyu , Yang, Xiaoqiang , Zhao, Haoran . Shear behavior and design of headed studs embedded in steel-UHPC composite structures . | STRUCTURES , 2024 , 59 . |
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The current research on the cavitation phenomenon in the underwater explosion process is focused on the shock wave phase. In this study, it was found that there was also significant cavitation during bubble pulsation. Underwater explosion experiments were carried out at the bottom of a sheet using 2.5 g of TNT, which also showed that: (a) Cavitation lasts for the same duration as the bubble contraction time, (b) A cavitation closure pressure, the peak of which is greater than the bubble pulsation pressure, is produced by the closing of the cavitation zone. A tensile cut-off model was introduced to simulate the cavitation phenomenon during bubble pulsation, and the formation mechanism was investigated. The numerical simulation results show that: (a) The cavitation phenomenon is visible when the sheet above the explosive and the explosion distance are between 0.93 and 1.17 times the radius of the largest bubble, or between 0.69 and 1.85 times the maximum radius of the bubble when the sheet below the explosive, (b) The cavitation region and cavitation closure pressure increase and decrease with increasing explosion distance, peaking at a value close to one times the theoretical maximum bubble radius, and (c) The cavitation zone shrinks and the cavitation closing pressure drops as sheet thickness increases.
Keyword ：
Bubble pulsation Bubble pulsation Cavitation Cavitation Near-field Near-field Underwater explosion Underwater explosion
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| GB/T 7714 | Wen, Yanbo , Qin, Jian , Lai, Zhichao et al. Experimental and numerical simulation investigation of cavitation phenomenon during bubble pulsation process [J]. | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2024 , 186 . |
| MLA | Wen, Yanbo et al. "Experimental and numerical simulation investigation of cavitation phenomenon during bubble pulsation process" . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 186 (2024) . |
| APA | Wen, Yanbo , Qin, Jian , Lai, Zhichao , Meng, Xiangyao , Yang, Xiaoqiang , Chi, Hui et al. Experimental and numerical simulation investigation of cavitation phenomenon during bubble pulsation process . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2024 , 186 . |
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Structures may suffer from accidental impact loads during the service life. While most impacts will not destroy structures completely, quantifying their residual behavior after impact is crucial for evaluating the damage and then providing recommendations for repair or removal. This may greatly reduce the time and economic losses caused by impacts. Hence, this study experimentally and numerically investigated the residual behavior of UHPC-filled high-strength steel tube (UHPC-FHST) members subjected to axial impact. Parameters including impact energy, steel ratio, specimen length, and steel grade (Q690 and Q355) were carefully considered. After tests, different failure modes and axial load-displacement curves were obtained. The residual ratio (β), a ratio of the bearing capacity of a damaged specimen to that of a specimen without impact, was employed to assess the damage level of UHPC-FHST members after axial impact. Tests showed that UHPC-FHST members have excellent axial impact resistance, high residual strength, and high residual ratio, especially under low-energy impact conditions. β decreases rapidly and linearly with increasing nominal strain and then stabilizes after a certain value. A finite element (FE) model was thereafter established and benchmarked by the available test results, where two analysis steps were established to continuously simulate the impact and residual compression processes. The FE results demonstrated a great agreement with the tests, which could provide a reference for further investigations in related studies. © 2024 Elsevier Ltd
Keyword ：
Concretes Concretes High strength steel High strength steel Losses Losses Tubular steel structures Tubular steel structures
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| GB/T 7714 | Yang, Xiaoqiang , Zhang, Zhiqi , Lai, Zhichao et al. Residual behavior of UHPC-filled Q690 high-strength steel tubular members after axial impact [J]. | Engineering Structures , 2024 , 309 . |
| MLA | Yang, Xiaoqiang et al. "Residual behavior of UHPC-filled Q690 high-strength steel tubular members after axial impact" . | Engineering Structures 309 (2024) . |
| APA | Yang, Xiaoqiang , Zhang, Zhiqi , Lai, Zhichao , Chen, Jianqing , Zhang, Chao . Residual behavior of UHPC-filled Q690 high-strength steel tubular members after axial impact . | Engineering Structures , 2024 , 309 . |
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The cavitation phenomenon caused by near-field underwater explosion imposes a secondary loading on ship structures. Studying the cavitation effects of plates during underwater explosions has implications for ship protection since plate is a typical structure of ships. This paper experimentally investigated the behavior of fixed square plates subjected to near-field underwater explosions. Experimental results indicated that cavitation existed in both shockwave and bubble pulsation stages; and the cavitation closure load at bubble pulsation stage was measured. To further investigate the cavitation phenomenon and the load characteristics at the bubble pulsation stage, finite element models were developed. The numerical results show that cavitation will increase the bubble load impulse by 47 % under specific conditions. These models were then used to investigate the influence of the stand-off distance and charge weight on cavitation area and load characteristics. An empirical formula was finally proposed to predict the coupled impulse of cavitation closure, bubble pulsation and water jet. This research has practical guidelines for the protection design of ship structures.
Keyword ：
Bubble pulsation Bubble pulsation Cavitation Cavitation Impulse Impulse Load Load Underwater explosion Underwater explosion
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| GB/T 7714 | Huang, Ruiyuan , Chen, Yufan , Qin, Jian et al. Investigation on cavitation phenomena and load characteristics of fixed square plates subjected to near-field underwater explosion [J]. | OCEAN ENGINEERING , 2024 , 295 . |
| MLA | Huang, Ruiyuan et al. "Investigation on cavitation phenomena and load characteristics of fixed square plates subjected to near-field underwater explosion" . | OCEAN ENGINEERING 295 (2024) . |
| APA | Huang, Ruiyuan , Chen, Yufan , Qin, Jian , Meng, Xiangyao , Wen, Yanbo , Yang, Xiaoqiang et al. Investigation on cavitation phenomena and load characteristics of fixed square plates subjected to near-field underwater explosion . | OCEAN ENGINEERING , 2024 , 295 . |
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Impacts have the distinctive characteristics of diverse conditions, low frequency, repeated occurrence, and high hazard; as such, they have emerged as a leading factor in bridge collapses. Ultra-high-performance concrete (UHPC)-filled high-strength steel tubular members are the preferred choice for large-span and high-pier bridges whose vulnerability to impacts cannot be ignored. Nine UHPC-filled high-strength square steel tubular specimens were designed in this study to explore their axial impact resistances and residual bearing capacities using a drop hammer and a hydraulic testing machine, respectively. The influence of impact energy and UHPC steel fiber content on key performance indicators including impact force, deformation, energy absorption, residual capacity, and residual rate were subsequently evaluated. The results show that the impact resistance and residual capacity of a UHPC-filled high-strength steel tubular member are significantly higher than those of a high-strength concrete-filled high-strength steel tubular member and that UHPC members can withstand greater levels of axial impact energy. Furthermore, the strong bonding behavior between the steel fibers and concrete matrix, as well as the resulting fiber network skeleton, can effectively improve the strength, crack resistance, ductility, and energy dissipation capacity of UHPC. Indeed, the incorporation of steel fibers significantly reduces the peak displacement and residual deformation of components subjected to axial impact by up to 14. 3% and 31. 4%, respectively, and an increase in steel fiber volume content from 0% to 2% increases the energy absorption per unit deformation by 38. 4%. In addition, when a specimen does not suffer severe damage from the axial impact, its residual bearing capacity and residual rate increase significantly by up to 28. 3 % and 12. 4 %, respectively. Therefore, an appropriate increase in fiber content (up to 2 %) can improve the axial impact resistance and residual bearing capacity of a UHPC-filled high-strength square steel tubular member. However, the steel fiber contents considered in this study align with conventional engineering practice, and a more comprehensive assessment and analysis should be conducted for scenarios beyond this scope. © 2024 Chang'an University. All rights reserved.
Keyword ：
Bearing capacity Bearing capacity Benchmarking Benchmarking Energy absorption Energy absorption Energy dissipation Energy dissipation High performance concrete High performance concrete High strength steel High strength steel Steel fibers Steel fibers Steel testing Steel testing Tubular steel structures Tubular steel structures
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| GB/T 7714 | Yang, Xiao-Qiang , Zhang, Qiang , Lai, Zhi-Chao et al. Axial Impact and Residual Behavior of UHPC-filled High-strength Square Steel Tubular Members [J]. | China Journal of Highway and Transport , 2024 , 37 (5) : 234-245 . |
| MLA | Yang, Xiao-Qiang et al. "Axial Impact and Residual Behavior of UHPC-filled High-strength Square Steel Tubular Members" . | China Journal of Highway and Transport 37 . 5 (2024) : 234-245 . |
| APA | Yang, Xiao-Qiang , Zhang, Qiang , Lai, Zhi-Chao , Chen, Jian-Qing , Ma, Wen-Shuo . Axial Impact and Residual Behavior of UHPC-filled High-strength Square Steel Tubular Members . | China Journal of Highway and Transport , 2024 , 37 (5) , 234-245 . |
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Near-field underwater explosions generate complex load forms and cause destructive strikes on ships. To investigate the damage characteristics of ships under the combined effect of multiple loads, local and overall damage modes were first investigated through the combination of experimental tests and numerical simulation. Then a series of numerical simulations of full-scale ships subjected to near-field underwater explosions with different stand-off distances, equivalents, and detonation positions were carried out. The damage effects of shock wave, bubble pulsation, after flow, and water jet loads on ships were analyzed. The results show that the combined effects of different loads lead to different damage modes. Shock waves and after flow loads are the main cause of local damage and hogging damage, while pressure difference and bubble adsorption are the main reasons for the hogging damage. Finally, a criterion was proposed to determine the damage modes of ships under near-field underwater explosions.
Keyword ：
CEL method CEL method Full-size ships Full-size ships Near-field underwater explosion Near-field underwater explosion Numerical simulation Numerical simulation Ship damage modes Ship damage modes
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| GB/T 7714 | Huang, Ruiyuan , Jiang, Yipeng , Qin, Jian et al. Investigation on the coupling damage effects of ships subjected to near-field underwater explosion loads [J]. | MARINE STRUCTURES , 2024 , 98 . |
| MLA | Huang, Ruiyuan et al. "Investigation on the coupling damage effects of ships subjected to near-field underwater explosion loads" . | MARINE STRUCTURES 98 (2024) . |
| APA | Huang, Ruiyuan , Jiang, Yipeng , Qin, Jian , Meng, Xiangyao , Chi, Hui , Yang, Xiaoqiang et al. Investigation on the coupling damage effects of ships subjected to near-field underwater explosion loads . | MARINE STRUCTURES , 2024 , 98 . |
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为了研究高强双钢板-UHPC组合剪力墙的轴压性能，进行了8片组合剪力墙的轴向受压试验，试验参数包括截面稳定系数、钢板厚度、钢板屈服强度和混凝土类型。试验结果表明：钢板的破坏形态受截面稳定系数的影响可分为弹性屈曲破坏和塑性屈曲破坏两种类型；截面稳定系数从0.6增加到1.2时，组合剪力墙的承载力下降了33.6%;钢板厚度从3 mm增加到5 mm时，组合剪力墙的承载力增加了16.7%;屈曲参数k取0.8时，采用欧拉公式可以很好地预测钢板的临界屈曲应变。最后，对比了中国GB/T 51340—2018《核电站钢板混凝土结构技术标准》和美国AISC 360-22对组合剪力墙承载力的计算结果，发现美国AISC 360-22可以较好地估算高强双钢板-UHPC组合剪力墙的轴压承载力。
Keyword ：
组合剪力墙 组合剪力墙 超高性能混凝土 超高性能混凝土 轴压承载力 轴压承载力 静力试验 静力试验 高强钢 高强钢
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| GB/T 7714 | 姚鹏宇 , 赖志超 , 杨晓强 . 高强双钢板-UHPC组合剪力墙轴压性能试验研究 [J]. | 建筑结构学报 , 2024 , 45 (S1) : 228-235 . |
| MLA | 姚鹏宇 et al. "高强双钢板-UHPC组合剪力墙轴压性能试验研究" . | 建筑结构学报 45 . S1 (2024) : 228-235 . |
| APA | 姚鹏宇 , 赖志超 , 杨晓强 . 高强双钢板-UHPC组合剪力墙轴压性能试验研究 . | 建筑结构学报 , 2024 , 45 (S1) , 228-235 . |
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Prestressed corrugated steel-concrete (PCSC) composite girders are often subjected to combined bending and torsion in practice, but the existing theoretical models have mainly focused on pure torsional behavior. Thus, this paper proposed a modified combined action softened truss model (MCA-STM) to predict the flexural-torsional coupling behavior and failure modes of PCSC composite girders. The equivalent loading and nonlinear equations were modified, and the convergence criteria of flexural and torsional failure were established, considering the structural characteristics of PCSC composite girders. A new optimized algorithm was employed to solve the MCA-STM, providing a more efficient and numerically stable solution procedure. A 3D finite element analysis (FEA) model of the PCSC composite girder was established, which was verified by comparing the available test results. A parametric study was carried out based on the verified FEA model to get more datasets with various parameters, and the results were compared to the proposed analytical model. The curves obtained by the FEA and MCA-STM are in good agreement, indicating that the proposed analytical model can predict the full flexural-torsional coupling behavior and failure modes of the PCSC composite girders. © 2024 Elsevier Ltd
Keyword ：
Combined action softened truss model Combined action softened truss model Corrugated steel-concrete composite girders Corrugated steel-concrete composite girders Failure modes Failure modes Flexural-torsional coupling behavior Flexural-torsional coupling behavior Optimized algorithm Optimized algorithm
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| GB/T 7714 | Zhang, H. , Zhao, Q. , Chen, Y. et al. Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders [J]. | Engineering Structures , 2024 , 319 . |
| MLA | Zhang, H. et al. "Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders" . | Engineering Structures 319 (2024) . |
| APA | Zhang, H. , Zhao, Q. , Chen, Y. , Fang, X. , Yang, Z. , Yang, X. . Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders . | Engineering Structures , 2024 , 319 . |
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冲击具有作用源多样、低频多发、危害性大等鲜明特征，已成为桥梁垮塌的主要原因之一。高强钢管超高性能混凝土(UHPC)作为大跨高墩桥梁的优选构件之一，其受冲击作用的风险不可忽视。设计制作了9根高强方钢管UHPC短柱，以期研究其轴向冲击性能及冲击后剩余性能。采用落锤试验机和液压试验机分别开展轴向冲击试验及冲击后剩余承载力试验，主要考虑冲击能量和钢纤维掺量2种参数，探究冲击力、变形、能量吸收、剩余承载力和剩余率等关键性能指标的变化规律。结果表明：高强钢管UHPC构件的抗冲击性能和剩余性能明显优于高强钢管高强混凝土构件，能够应对更大能量的轴向冲击作用；钢纤维与混凝土基体之间的黏结锚固作用及其形成的纤维网骨架能有效提高UHPC的强度、抗裂性、延性与耗能能力，这一特性使得构件在冲击作用下的峰值位移和残余变形随着钢纤维掺量的增加而显著降低；2%钢纤维掺量时，峰值位移与残余变形的降低幅度分别可达14.3%和31.4%,单位变形耗能最大提升了38.4%;在未发生严重损伤的情况下，构件的剩余承载力和剩余率随着钢纤维掺量的增加显著提高，分别可达28.3%和12.4%;在0～2%范围内，钢纤维体积掺量的增加可显著提高钢管混凝土构件的抗轴向冲击性能与冲击后剩余力学性能。需要指出，考虑的钢纤维掺量仅针对工程设计中常用范围，超出研究范围时需进一步论证分析。
Keyword ：
UHPC UHPC 剩余承载力 剩余承载力 桥梁工程 桥梁工程 试验研究 试验研究 轴向冲击 轴向冲击 钢纤维体积掺量 钢纤维体积掺量 高强钢管 高强钢管
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| GB/T 7714 | 杨晓强 , 张强 , 赖志超 et al. 高强方钢管UHPC构件轴向冲击与冲击后剩余性能 [J]. | 中国公路学报 , 2024 , 37 (05) : 234-245 . |
| MLA | 杨晓强 et al. "高强方钢管UHPC构件轴向冲击与冲击后剩余性能" . | 中国公路学报 37 . 05 (2024) : 234-245 . |
| APA | 杨晓强 , 张强 , 赖志超 , 陈剑清 , 马文硕 . 高强方钢管UHPC构件轴向冲击与冲击后剩余性能 . | 中国公路学报 , 2024 , 37 (05) , 234-245 . |
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