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

• 土木工程学科 • 上一篇    下一篇

新型卷边钢板组合截面PEC柱(强轴)滞回性能试验研究

方有珍1,马 吉1,陆承铎1,曲延全1,申 林2   

  1. (1. 苏州科技学院江苏省结构重点实验室(土木工程学院),江苏,苏州 215011;2. 中国建筑标准设计研究院,北京 100044)
  • 收稿日期:2011-09-27 修回日期:2012-02-21 出版日期:2013-03-25 发布日期:2013-03-25
  • 通讯作者: 方有珍
  • 基金资助:

    "国家自然科学基金项目(51078247);国家住房与城乡建设部科研项目(2009-K2-23);江苏省自然科学基金项目(BK2009558);苏州市建设系统科研项目(201013);江苏省“青蓝工程”青年学术骨干资助项目(2010-3) "

"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

摘要:

为进一步改善现行薄壁钢板组合截面PEC柱构件双向不等刚度和翼缘局部屈曲过于集中等力学性能缺陷,该文提出了采用翼缘钢板卷边的新型卷边钢板组合截面PEC柱类型。以拉结板条间距作为基本参数,对4个按新型卷边钢板组合截面强轴布置的足尺试件进行了恒定竖向荷载下的水平低周反复荷载试验,观察了试验过程中PEC柱卷边钢板组合截面翼缘钢板局部屈曲和混凝土部分裂缝开展与压溃发展过程,得到了试件的荷载-位移滞回曲线。根据试验结果分析了PEC柱的承载力、抗侧刚度、耗能与延性、变形模式与破坏模态等力学性能。结果表明:试验卷边PEC柱试件充分发挥了薄板局部屈曲后性能,具有优越的变形与耗能能力;构件的破坏模式为柱脚部位卷边钢板组合截面翼缘局部屈曲部位不断扩展和伴随混凝土大面积压溃。

关键词: 卷边钢板组合截面PEC柱 , 拟静力试验 , 滞回性能 , 耗能与延性 , 变形模式 , 破坏模态

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

中图分类号: 

  • TU398.9
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