方有珍, 马 吉, 陆承铎, 曲延全, 申 林. 新型卷边钢板组合截面PEC柱(强轴)滞回性能试验研究[J]. 工程力学, 2013, 30(3): 181-190. DOI: 10.6052/j.issn.1000-4750.2011.09.0640
引用本文: 方有珍, 马 吉, 陆承铎, 曲延全, 申 林. 新型卷边钢板组合截面PEC柱(强轴)滞回性能试验研究[J]. 工程力学, 2013, 30(3): 181-190. DOI: 10.6052/j.issn.1000-4750.2011.09.0640
FANG You-zhen, MA Ji, LU Cheng-duo, QU Yan-quan, SHEN Lin. "TEST STUDY ON HYSTERETIC BEHAVIOR OF PEC COLUMNS (STRONG AXIS) FABRICATED WITH CRIMPING THIN-WALLED BUILT-UP SECTION "[J]. Engineering Mechanics, 2013, 30(3): 181-190. DOI: 10.6052/j.issn.1000-4750.2011.09.0640
Citation: FANG You-zhen, MA Ji, LU Cheng-duo, QU Yan-quan, SHEN Lin. "TEST STUDY ON HYSTERETIC BEHAVIOR OF PEC COLUMNS (STRONG AXIS) FABRICATED WITH CRIMPING THIN-WALLED BUILT-UP SECTION "[J]. Engineering Mechanics, 2013, 30(3): 181-190. DOI: 10.6052/j.issn.1000-4750.2011.09.0640

新型卷边钢板组合截面PEC柱(强轴)滞回性能试验研究

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

  • 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。

     

    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.

     

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