Engineering Mechanics ›› 2013, Vol. 30 ›› Issue (3): 181-190.doi: 10.6052/j.issn.1000-4750.2011.09.0640

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"TEST STUDY ON HYSTERETIC BEHAVIOR OF PEC COLUMNS (STRONG AXIS) FABRICATED WITH CRIMPING THIN-WALLED BUILT-UP SECTION "

FANG You-zhen1 , MA Ji1 , LU Cheng-duo1 , QU Yan-quan1 , SHEN Lin2   

  1. (1. Jiangsu Key Laboratory of Structure Engineering and Civil Engineering College, University of Science and Technology of Suzhou, Suzhou, Jiangsu 215011, China; 2. China Institute of Building Standard Design and Research, Beijing 100044, China)
  • Received:2011-09-27 Revised:2012-02-21 Online:2013-03-25 Published:2013-03-25
  • Contact: FANG You-Zhen

Abstract:

In order to alleviate the mechanics defects of PEC columns fabricated with thin-walled built-up sections as the biaxial unequal flexural stiffness and concentration of local buckling in flanges, new PEC columns fabricated with crimping thin-walled built-up sections were put forward. The transverse steel sheet links-spacing was taken as a primary design parameter, 4 specimens were designed and fabricated by full-scale. The tests of specimens were conducted with constant axial compression and low-cycle lateral reversed loading in the column strong axis, the local buckling in the flange of a crimping thin-walled built-up section and the crack forming and crushing of concrete were investigated, the load-displacement hysteretic curves were obtained. Base on the test results, the specimens’ relative performance were analyzed, including the load-carrying capacity, lateral stiffness, the seismic ductility and energy-dissipation capacity, the deformation pattern and failure mode. The conclusion showed that all specimens exhibited soundly deformation and energy-dissipation capacity resulted from the post-buckling performance of crimping flanges were utilized fully; the failure mode is primarily induced by the local buckling region growing in flanges of crimping thin-walled built-up sections with large-area crushing and spalling of concrete at the corner region of a column.

Key words: PEC column with crimping thin-walled built-up section , pseudo-static test , hysteretic behavior , energy-dissipation and ductility , deformation pattern , failure mode

CLC Number: 

  • TU398.9
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