Seismic Performance Analysis of Connection Joints Between Modules of Special-Shaped Steel Tubular Columns

Weibo Zhou; Yan Wang; Jie Wang; Qi An

doi:10.13206/j.gjgS24073001

Volume 40 Issue 5

May 2025

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Weibo Zhou, Yan Wang, Jie Wang, Qi An. Seismic Performance Analysis of Connection Joints Between Modules of Special-Shaped Steel Tubular Columns[J]. STEEL CONSTRUCTION(Chinese & English), 2025, 40(5): 51-62. doi: 10.13206/j.gjgS24073001

Citation:

Weibo Zhou, Yan Wang, Jie Wang, Qi An. Seismic Performance Analysis of Connection Joints Between Modules of Special-Shaped Steel Tubular Columns[J]. STEEL CONSTRUCTION(Chinese & English), 2025, 40(5): 51-62. doi: 10.13206/j.gjgS24073001

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Seismic Performance Analysis of Connection Joints Between Modules of Special-Shaped Steel Tubular Columns

doi: 10.13206/j.gjgS24073001

School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China

Received Date: 2024-07-30
Available Online: 2025-07-09

Abstract

Abstract

To meet the functional requirements of steel structure modular buildings and improve the construction assembly ratio， a connection joint between modules of special-shaped steel tubular columns is proposed. This joint adopts a through-bolt assembly connection， with L-shaped special-shaped steel tubular columns used as the columns， and the designed column section has the same thickness as the wall， which avoids exposure of the column corners and meets the functional requirements of the building. The ABAQUS finite element software was used to establish a refined finite element model with varying joint parameters， and to perform monotonic and low-cycle cyclic loading on it. A comparative analysis was conducted on the bearing capacity and seismic performance indicators such as joint failure modes， hysteresis curves， skeleton curves， stress paths， and energy dissipation capabilities. The research results showed that the failure mode of the connection joint between the special-shaped steel tubular column modules was dominated by bending failure of the beam， which conformed to the design concept of "strong columns and weak beams." The hysteresis curve presented a full shuttle shape， with the ultimate inter-story rotation angle and ductility coefficient exceeding 0.03 rad and 5.0， respectively， meeting the seismic design requirements for the joint. Reinforcing the angle steel in the panel zone effectively improved the stress state near the bolt holes in the column wall. Increasing the thickness of the vertical cross-shaped connection keys enhanced the energy dissipation capacity of the joint. Based on the force transmission mechanism and deformation mechanism of the joint， the superposition method was used to calculate the shear deformation in the core area of the joint. A theoretical formula for the initial rotational stiffness was derived and verified with finite element numerical simulation results. The research results indicated that the theoretical calculation formula for the initial rotational stiffness achieved good consistency with the finite element calculation results.

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References(20)

References

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