Influence of the Elastic Supports on the Dynamic Buckling of Arch Structures under Explosive Impact

DOI

10.2991/978-94-6463-449-5_27How to use a DOI?

Keywords

vibration theory; dynamic buckling; arch; elastic supports; explosive impact

Abstract

Elastic supported arch structures are widely used in engineering. Under dynamic loads, the bearing capacity of arch structures is closely related to their dynamic stability. In this paper, the effects of the elastic supports on the arch dynamic response and dynamic buckling are investigated by numerical method. The results show that the elastic supports change the stress distribution of the arch structure. The most dangerous position is no longer the arch springing but the spandrel. During the explosion phase, the elastic supports reduce the effective stress peak. But during the free vibration phase, the vibration is enhanced. It is difficult to reduce the vibration by elastic supports solely. The damping supports should be set up at the same time. The elastic supports also change the deformation laws. The plastic hinges appear first at the spandrel but not at the springing. When the dynamic buckling occurs, the plastic deformation zone is less than one of the rigid supported arches. The elastic supports still reduce the dynamic buckling critical load. When the stiffness of the elastic supports changes within a certain range, the stiffness is larger, the critical load smaller. The elastic supports increase the arches’ ultimate load-bearing capacity. And the smaller the stiffness is, the bigger the ultimate load-bearing capacity is. The smaller the damping constant is, the smaller the dynamic buckling critical load is. But the damping supports have little effect on the ultimate load-bearing capacity.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Ting Kang
AU  - Huikai Bai
AU  - Huixiang Sun
AU  - Erlei Bai
AU  - Qiqi Sun
PY  - 2024
DA  - 2024/06/30
TI  - Influence of the Elastic Supports on the Dynamic Buckling of Arch Structures under Explosive Impact
BT  - Proceedings of the 2024 8th International Conference on Civil Architecture and Structural Engineering (ICCASE 2024)
PB  - Atlantis Press
SP  - 284
EP  - 295
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-449-5_27
DO  - 10.2991/978-94-6463-449-5_27
ID  - Kang2024
ER  -