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LI J , ZHANG R B , JIN L , et al. A unified impact displacement prediction model for geometrically similar RC beams: from test specimen to prototype component [J ] . International Journal of Impact Engineering , 2023 , 181 : 104731 . DOI: 10.1016/j.ijimpeng.2023.104731 http://doi.org/10.1016/j.ijimpeng.2023.104731 https://linkinghub.elsevier.com/retrieve/pii/S0734743X23002415 https://linkinghub.elsevier.com/retrieve/pii/S0734743X23002415

VALERIO B D . Behavior of a simple beam grillage structure on damaged supports [J ] . Acta Mechanica , 2023 , 234 ( 5 ): 2167 - 2178 . DOI: 10.1007/s00707-023-03491-9 http://doi.org/10.1007/s00707-023-03491-9 Beam grillage structures are extensively adopted in various civil, mechanical and marine engineering. Although several studies deal with the tolerance of such systems to direct damages on beams, almost no literature exists on the effects on the whole grillage of damages on the supports. To this aim, the present study details the response of a simple grillage structure lying on non-rigid supports. A dimensionless analysis is proposed to address all the possible mechanical and geometrical configurations. Simulating a local damage, a variation of a single support vertical stiffness is introduced to highlight the behavior of the system. It is found that the behavior of the grillage on spring supports does not depend on the structural arrangement of the grillage itself, but also on the stiffness of the supports. In particular, the response of the structure is largely affected by the stiffness of the intact supports rather than the stiffness of the damaged support. Completely different structural responses are found, involving a local or a global compliance towards the weak support, the twisting of the grillage or a folding-like behavior depending on the location of the damaged support. The evolution of the effects of the damage on the support suggests that, in certain configurations, the grillage behaves as a complex structure, while in others as a simple structure.

SZÁVA R , BOLLÓ B , BENCS P , et al. Experimental and numerical studies of the heat transfer in thin-walled rectangular tubes under fire [J ] . Symmetry , 2022 , 14 ( 9 ): 1781 . DOI: 10.3390/sym14091781 http://doi.org/10.3390/sym14091781 https://www.mdpi.com/2073-8994/14/9/1781 https://www.mdpi.com/2073-8994/14/9/1781 The paper studies, experimentally and numerically, the fire behavior of some structural elements of symmetric-tubular (rectangular in this study) shapes using modern dimensional analysis (MDA). A model at a certain scale of the real prototype is analyzed in order to obtain its response in case of fires. Experimental measurements are performed on a 1:10 scale model of a real support pillar and compared with the results of the numerical simulation. The obtained results can have useful applications in engineering practice, allowing fast obtaining of results with minimal costs.

李锡锋 , 巨圆圆 , 杜志鹏 , 等 . 基于量纲分析的两次内爆加载下舱室结构损伤规律研究 [J ] . 兵器装备工程学报 , 2022 , 43 ( 3 ): 94 - 98 .

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TANG H , ZHAI H B , SU J J , et al. Punching Shear failure regulation of reinforced concrete beams subjected to close-in explosion [J ] . Journal of Physics: Conference Series , 2022 , 2148 ( 1 ): 012018 . DOI: 10.1088/1742-6596/2148/1/012018 http://doi.org/10.1088/1742-6596/2148/1/012018 Aiming at the damage effect of reinforced concrete beams subjected to close-in explosion, numerical simulation and dimensional analysis are carried out to study the damage of beams under close-in explosion with spherical charge. The damage characteristics of beams were obtained by the methods of AUTODYN and DYNA. Using dimensional analysis, the relationship between the damage characteristics of reinforced concrete beams and the stand-off distance is deduced. The empirical equation of the beam punching shear failure characteristics is fitted on the basis of numerical simulation. The results show that the simulation method is more efficient than the fluid-solid coupling calculation; the proposed empirical equation is in good agreement with the experimental results. The relationship between failure width and the stand-off distance obtained by the fitting and the modelling method have reference value for the research on the damage effect of reinforced concrete beams.

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闫俊伯 , 刘彦 , 李臻 , 等 . 箍筋间距和轴压比对爆炸载荷作用下钢筋混凝土柱动态响应的影响 [J ] . 兵工学报 , 2020 , 41 ( 增刊2 ): 35 - 43 .

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