摘要
对轴向局部压力作用下的薄壁钢管混凝土（STCC）短柱进行受力性能的试验分析，共测试了46个试验构件，其中有36个STCC构件和10个素混凝土构件。主要参数有：1）截面类型：圆形和方形；2）局部受压面积比（混凝土横截面面积与局部受压面积之比）：1～25；3）钢管宽度（或直径）与壁厚的比率，B（或D）／t：52．1～104．7。结果发现，复合截面的弯曲极限强度会随局部受压面积比的增加而减小；对钢管核心区混凝土的约束作用和局部加载STCC构件的极限强度会随着钢管宽度（或直径）与厚度之比值的增加而减小。分析同时发现，在局部轴压作用下，一般圆形钢管比方形管能更好地约束核心混凝土。
The behavior of thin walled steel tube confined concrete （STCC） stub columns subjected to axial local compression was experimentally investigated in this paper. A total of 46 specimens, including 36 STCC specimens and 10 plain concrete specimens, were tested. The main parameters varied in the tests are： （1） sectional types： circular and square; （2） local compression area ratio （concrete cross-sectional area to local compression area） ： from 1 to 25; （3） steel tube width （or diameter）-to-wall thickness ratio, B（or D）/t, from 52.1 to 104.7. It was found that the ultimate bearing strength of the composite sections decreases with increase local compression area ratio. The confinement action of the steel tube to core concrete and the ultimate strength of the locally loaded STCC specimens decrease with increase in steel tube width （or diameter）-to-thickness ratio. It was also found that, generally, circular steel tubes have higher confinement to their concrete core than those of the tubes with square sections when the composite members are subjected to axially local compression.
出处
《钢结构》
2008年第9期80-80,共1页
Steel Construction
关键词
复合柱
局部受压
组合作用
混凝土
设计
截面承载力
Composite columns
Local compression
Com-posite action
Concrete
Design
Sectional capacity
