Autor: Xie, Zhongyou - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fillet effect on the bending crashworthiness of thin-walled square tubes
Autorzy:: Xie, Zhongyou
Zhao, Zhixian
Zhou, Xiuneng
Li, Cheng
Powiązania:: https://bibliotekanauki.pl/articles/2086940.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: thin-walled square tubes
bending crashworthiness
fillet effect
three-point bending
finite element analysis
Opis:: Filleting four corners of square tubes is suggested to reduce the peak force and improve energy absorbing performance. Three-point bending tests are conducted to investigate fillet radius effects employing an ABAQUS explicit code. Three cases characterized by the ratio of width to thickness are considered. Fillet greatly reduces the maximum forces compared with square cross-sections, and the normalized maximum forces decrease with increasing wall thickness when the fillet radius is larger. Additionally, the fillet dramatically improves SEA (Specific Energy Absorption). The normalized CFE (Crash Load Efficiency) significantly exceeds that of the square ones, and the normalized CLEs are almost identical with the increasing fillet radius.
Źródło:: Journal of Theoretical and Applied Mechanics; 2022, 60, 1; 103--111
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Collapse modes of concrete reinforced square bridge piers under vehicle collision
Autorzy:: Zhou, Xiuneng
Xie, Zhongyou
Zhao, Zhixian
Li, Cheng
Powiązania:: https://bibliotekanauki.pl/articles/2086980.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: RC square pier
collapse mode
vehicle collision
numerical simulation
Opis:: In the field of engineering protection, there is a structural disaster named heavy vehicles impacting column structures. When a heavy truck collides with a reinforced concrete (RC) column at a high velocity, a large impact force generated makes perhaps the column fail and even collapse. Therefore, it is necessary to study the dynamic characteristics during such a disaster, which can provide some reference for structural design, optimization and protection. The RC column impacted by a vehicle could be simplified as a beam fixed at the bottom loaded by a concentrated force, whose deformation is controlled by shearing and bending. In the present work, the ultimate static forces corresponding to shearing and bending collapse are proposed based on theoretical analyses. The model validation is performed using the finite element approach and the theoretical analytical results are in good agreement with the finite element simulation results, which validates the present analytical model. Three cases are simulated by utilizing finite element code ABAQUS, which reveals that the approximate plateau collapse force keeps a long stage beyond the peak failure one. In addition, three collapse modes are observed based on the static force and deformation analysis, validating the present framework which can be used for routine pier design. The work can be extended to estimate collapse modes of building columns under a vehicle collision.
Źródło:: Journal of Theoretical and Applied Mechanics; 2022, 60, 3; 375--384
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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