箱式模块化钢结构单边螺栓连接节点抗震性能数值分析
马宏渊 , 何晓红 , 马洁璇 , 杨俊芬 , 何琛 , 李政洋
结构工程师 ›› 2025, Vol. 41 ›› Issue (05) : 73 -84.
箱式模块化钢结构单边螺栓连接节点抗震性能数值分析
Numerical Analysis of Seismic Performance of Box-Type Modular Steel Structure Single Side Bolted Joint
在利用ABAQUS验证有限元模型可靠的基础上,分析轴压比、连接插件厚度、梁盖板厚度对箱式模块化钢结构单边螺栓连接节点的破坏模式和抗震性能的影响。结果表明:单边螺栓预紧力变化对节点的抗震性能影响较小。连接插件厚度的变化对节点的抗震影响较大,当插件厚度从6 mm增大到10 mm时,极限荷载基本无变化。随着梁端盖板厚度的增加,节点承载力、初始刚度、后期刚度不断增大,延性不断减小。梁端盖板厚度变化对节点的耗能性能影响最为明显,当梁端盖板厚度为10 mm时,总耗能最大,梁端盖板厚度为8 mm和12 mm时,总耗能减小13%和19%,并且在加载后期出现等效黏滞阻尼系数下降的情况。
Based on the validation of the finite element model developed in ABAQUS, the effects of the axial compression ratio, the thickness of the connection insert, and the thickness of the beam cover plate on the failure mode and seismic performance of the single-sided bolted connection joint in box-type modular steel structures are investigated. The results indicate that variations in the preload of a single-side bolt have a limited influence on the seismic behavior of the joint. In contrast, the thickness of the connection insert has a more pronounced effect. When the insert thickness increases from 6 mm to 8 mm, the ultimate load increases significantly by approximately 7%. As the thickness of the beam end cover plate increases, the bearing capacity, initial stiffness, and later-stage stiffness of the joint also increase, while the ductility decreases. The thickness of the beam end cover plate exhibits the most notable impact on the energy dissipation capacity. The total energy dissipation reaches its maximum when the cover plate thickness is 10 mm, and decreases by 13% and 19% at thicknesses of 8 mm and 12 mm, respectively. Additionally, the equivalent viscous damping coefficient declines during the later loading phase.
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