|Table of Contents|

Study on Mechanical Behavior of Partially Replaceable Steel Frame Beam-column Joints(PDF)

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

Issue:
2021年02期
Page:
47-59
Research Field:
Publishing date:

Info

Title:
Study on Mechanical Behavior of Partially Replaceable Steel Frame Beam-column Joints
Author(s):
ZHENG Hong;  FANG Xian-lu;  SU Yao-xuan;  PENG Zhi-ming
School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China
Keywords:
steel frame;  hysteretic behavior;  numerical simulation;  beam-column joint;  energy consumption capacity
PACS:
TU311
DOI:
10.19815/j.jace.2020.07030
Abstract:
Based on the concept of fuse and plastic hinge outward movement, the extending end plates were connected integrating the advantages of weakened and spliced connections, a locally replaceable steel frame beam-column connection node was proposed. Two typical tests of end plate connection and splicing joint were selected for simulation to verify the reliability of the finite element modeling process, and then the specimen was analyzed with variable parameters to study the influence of the weakening depth, weakening length, and short beam length of the short beam flange on the bearing capacity, energy consumption capacity and ductility. The results show that by weakening the flanges of the H-shaped short beams, the plastic hinges are moved outwards, so that the plastic deformation under the earthquake is mainly concentrated on the short beams, and other components maintain elasticity and have good post-earthquake recovery capabilities. The degree of influence of parameters on the mechanical properties of the joint from large to small is weakening depth, weakening length, short beam length. As the flange weakening depth increases, the bearing capacity of the joint is significantly reduced, while the energy consumption and ductility are improved. At the same time, as the value of the weakened flange length increases, the maximum bearing capacity of the joint decreases, and the ductility coefficient increases. The influence of the short beam length on the mechanical properties of the joint is basically negligible.

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Last Update: 2021-03-20