Experimental study on structural performance of the new shaped weak-axis connection in full-scale test

Lee, Eun-Taik; Kang, Min-Joung; Kim, Sung‐Bae; Kim, Sang-Seup

doi:10.1007/s13296-014-0188-0

Cited by 4 publications

(1 citation statement)

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“…They reported that these types were easy to construct and ensured the flexural behavior of weak-axis moment connections. This weak axis connection was tested and reported again by Lee et al [10]. Lee et al [11,12] investigated the seismic performance of six types of weak-axis column-tree connections through cyclic testing of six full-scale specimens.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Box-Strengthened Panel Zone on Steel Frame Seismic Performance

Lu,

Zhang,

Zhang

et al. 2023

Buildings

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During the Northridge earthquake, extensive brittle failures on the weld zones of the beam bottom flanges in the rigidity connection of steel special moment frames (SMFs) were detected. One of the primary reasons is the high-tensile strain demand created at the beam bottom flange zones due to positive bending. The weak panel zone of the I-section column exhibits more shear deformation, which promotes and accelerates the brittle fracture of the beam bottom flange weld zones. A box-strengthened panel zone can minimize the shear deformation of the panel zone of the I-section column, which may also reduce the inter-story displacement of steel SMFs and enhance their seismic behavior. In order to investigate this fact, in this research we carried out a model test of a steel frame with a box-strengthened panel zone to examine SMFs’ seismic performance and inter-story displacement, as well as testing the contribution of panel zone shear deformation to inter-story drift. Numerical methods were then used to investigate the influence of the axial compression ratio and beam-to-column linear stiffness ratio on the effect of shear deformation on the box-strengthened panel zone. Design recommendations are given based on the research results.

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Section: Introductionmentioning

confidence: 99%