Finite Element Parametric Analysis of Seismic Performance of Wide-Flange L-Shaped CFST Composite Columns with Built-in PBL

XIONG Qingqing; GUI Haiwei; ZHANG Wang; LI Ge

doi:10.13204/j.gyjzG22042402

Volume 53 Issue 5

May 2023

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XIONG Qingqing, GUI Haiwei, ZHANG Wang, LI Ge. Finite Element Parametric Analysis of Seismic Performance of Wide-Flange L-Shaped CFST Composite Columns with Built-in PBL[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(5): 7-16,173. doi: 10.13204/j.gyjzG22042402

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Finite Element Parametric Analysis of Seismic Performance of Wide-Flange L-Shaped CFST Composite Columns with Built-in PBL

doi: 10.13204/j.gyjzG22042402

1. Department of Civil Engineering, Tianjin University, Tianjin 300072, China;
2. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
3. Dali Construstion Group Corporation Limited, Hangzhou 311215, China

Received Date: 2022-04-24

Abstract

Abstract

In order to study the seismic performance of the wide-flange L-shaped CFST composite column with built-in PBL (W-LCFST column), based on the existing test results, the numerical simulation of the L-shaped CFST composite column with built-in PBL was carried out, considering the ductile fracture failure of steel. The model results could well predict the location of the crack initiation point, the crack path and the load-displacement curve. Further comparison and analysis of parameters such as PBL separators quantity, PBL hole spacing, PBL hole size, side column size, axial compression ratio and steel pipe thickness were carried out. The results showed that when the number of PBL separators was increased from 2 to 6, the restraint effect on the core concrete was improved, and the displacement ductility coefficient was increased by 14.5%; the size of the PBL pore diameter and the spacing of the pores only affected the plastic stage. Before reaching the peak load, PBL partitions with a pore diameter of 51 mm were easily reduced in the unfavorable position and caused the W-LCFST pillar to be reduced. The concrete tenon in the PBL partition with a pore diameter of 17 mm was more likely to be cut and damaged, and the carrying capacity decreased rapidly; the axis pressure ratio was within the range of 0.25 to 0.55, and the bearing capacity of the W-LCFST column was increased first. The initial stiffness and the peak bearing capacity could be increased with the increase of the sizes of the edge column and the thickness of the steel pipe. When the sizes of the edge column increased from 100 mm×100 mm to 140 mm×100 mm, the initial stiffness increased by 13.7%. After the thickness of the steel pipe increased from 6 mm to 8 mm, the positive peak bearing capacity increased by 21.8%.
- CFST composite column,
- perforated steel plate,
- seismic performance,
- finite element analysis

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References(19)

References

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