Dynamic Response Process of PC Box-Girder Bridge under Implosion Load

YANG Zan; HAN Guozhen; YAN Bo; LIU Fei

doi:10.11858/gywlxb.20200585

Volume 35 Issue 1

Jan 2021

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Chinese Journal of High Pressure Physics > 2021 > 35(1): 014201.

YANG Zan, HAN Guozhen, YAN Bo, LIU Fei. Dynamic Response Process of PC Box-Girder Bridge under Implosion Load[J]. Chinese Journal of High Pressure Physics, 2021, 35(1): 014201. doi: 10.11858/gywlxb.20200585

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YANG Zan, HAN Guozhen, YAN Bo, LIU Fei. Dynamic Response Process of PC Box-Girder Bridge under Implosion Load[J]. Chinese Journal of High Pressure Physics, 2021, 35(1): 014201. doi: 10.11858/gywlxb.20200585

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Dynamic Response Process of PC Box-Girder Bridge under Implosion Load

doi: 10.11858/gywlxb.20200585

College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410072, Hunan, China

Received Date: 06 Jul 2020
Rev Recd Date: 27 Jul 2020

Abstract

Abstract

In this work, a numerical simulation was performed on the dynamic response process of the prestressed reinforced concrete (PC) box-girder bridge under implosion load via three-stage continuous coupling finite element method. Taking gravity and prestress into account, the damage mode of PC box-girder bridge was obtained. Besides, the failure mechanism was analyzed. It is shown that the PC box-girder bridge’s physical process from partial destruction to overall collapse can be theoretically reproduced by the three-stage continuous coupled finite element method. At initial stress stage, the stress of the PC box-girder bridge meets the requirement of the actual project. At local response stage, cracks occur at the connection between the web and the roof, and a break around the top and bottom flanges comes into being in the center. At overall response stage, influenced by the gravity and prestress, the box-girder bridge first arches up, then collapses and finally makes a bending failure.
- three-stage continuous coupling,
- blasting,
- box-girder bridge,
- dynamic response

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References(28)

References

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Dynamic Response Process of PC Box-Girder Bridge under Implosion Load

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