Dynamic response and failure mechanism of Geiger cable dome stractures under impact load

CHEN Lianmeng1, HUANG Bencheng1, ZENG Yihong1, LI Zebin1, HUANG Kaiyu1, LI Wei1, DONG Shilin2

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (18) : 145-154.

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (18) : 145-154.

Dynamic response and failure mechanism of Geiger cable dome stractures under impact load

  • CHEN Lianmeng1,HUANG Bencheng1,ZENG Yihong1,LI Zebin1,HUANG Kaiyu1,LI Wei1,DONG Shilin2
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Abstract

In line with the review of related studies and lack of literature on dynamic response and failure mechanism of cable dome structure under impact load, this paper is based on ANSYS/LS-DYNA analysis software and proposes an impact dynamic analysis model of Geiger cable dome structure. Displacement response and internal force response of the Geiger cable dome structure under typical examples are analyzed in detail, and the failure mode of the structure is further evaluated in conjunction with the collapse criteria of the American standard UFC4-023-03, three typical failure modes are proposed, namely, minor structural damage, partial structural damage, and overall structural failure. Then, based on the number of impact damage members and the degree of internal force damage of members, the concept of overall damage index of structure is proposed. Through parameter analysis, the variation characteristics of overall damage index of cable dome structure under different impact parameters are explored. The study found the relationship between the overall damage index and three failure modes, the overall damage index is less than 0.3. When the failure mode is partial structural damage, the overall damage index is between 0.3 and 0.8. When the failure mode is the overall structural failure, the overall damage index is greater than 0.8. According to the above observations, a failure mode control equation applicable for this model is proposed. The closer the impact load is to the center of the structure, the greater the probability of overall failure. Conversely, the greater the probability of partial and minor damage. Increasing the initial prestress level and the cross-sectional area of the member can effectively improve the impact resistance of the structure.

Key words

cable dome structure / impact load / failure mode / dynamic response / parameter analysis

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CHEN Lianmeng1, HUANG Bencheng1, ZENG Yihong1, LI Zebin1, HUANG Kaiyu1, LI Wei1, DONG Shilin2. Dynamic response and failure mechanism of Geiger cable dome stractures under impact load[J]. Journal of Vibration and Shock, 2024, 43(18): 145-154

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