|Table of Contents|

Numerical Simulation Study of Hot-rolled H-steel Beam Under Impact Loading(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年03期
Page:
127-138
Research Field:
Publishing date:

Info

Title:
Numerical Simulation Study of Hot-rolled H-steel Beam Under Impact Loading
Author(s):
DENG Xiao-fang;  JIANG Lin;  JIN Long-mei;  ZENG Rong;  LI Zhi
(College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, Guangxi, China)
Keywords:
H-steel beam;  impact resistance;  numerical simulation;  failure mode;  impact condition
PACS:
TU392
DOI:
10.19815/j.jace.2021.04023
Abstract:
In order to study the dynamics performance and failure mode of hot-rolled H-steel beam under impact load, a refined finite element model was established for the impact test of H-steel beam, and the accuracy of the finite element model was verified by comparing with the experimental results. Based on the finite element model, the load redistribution and internal force change of steel beam under impact load were analyzed. Then the extended parameter analysis was carried out to study the effects of steel strength, hammer head geometry, local reinforcement, impact position and boundary conditions on the impact resistance of steel beams. The results show that under the impact load, the steel beam appears local buckling and bears asymmetric shear at the end of the response stage. The main failure forms are local buckling and torsional deformation. When the steel strength is improved, the overall impact resistance of the steel beam is enhanced accordingly. The change of hammer head geometry leads to the change of contact stiffness and the change of impact force time history curve. When the impact zone is provided with local reinforcement, the stiffness and stability of the impact zone are improved, and the impact resistance of the steel beam is improved. When the impact position is closer to the support, the steel beam can better resist the damage caused by impact load because the time interval from the occurrence of impact force to the occurrence of support reaction is shortened. When the steel beam boundary condition is changed from hinged to rigid connection, the influence of inertial load increases due to the increase of steel beam length, and the restraint of support to beam body is weakened, the overall impact force is greatly reduced and the beam span deflection is increased.

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Last Update: 2022-05-30