摘要
完成八个偏压型钢混凝土柱单调加载试验研究,柱的变化参数为钢骨型号、长细比、偏心距。分析了型钢、钢筋、混凝土、受压区箍筋的应变对柱受力性能影响,对比了柱的荷载挠度曲线,分析了型钢含量对变形性能的影响。分别列举了包括规程法在内的长细比、受拉翼缘、纵筋应力两种计算方法并与试验结果进行了对比,对不同计算方法进行了评价。通过合理的理论分析,推荐了与试验结果吻合较好的型钢混凝土柱临界保护层厚度计算公式。当柱截面尺寸较小时,为提高规程计算方法的精度,规程公式中初始偏心距ea取值可作适当调整。
The test of eight eeeentric steel reinforced eoncrete eolumns were conducted under statie load, and the related parameters were the dimension of profiled steel, slenderness ratio and eeeentrieity. The strain change effects of profiled steel, steel, concrete, stir-up of the pressure area to column performance were discussed, the load-displace curves were compared, and the influence of steel percentage eomposition to deformation of column was concluded. Each two kinds of method （ including standard means ） to ealeulate slenderness ratio, flange and steel stress of the tension area were listed, the results were compared to the test, and the conclusion was draw. The formula concerning the flange girth width and concrete strength to calculate the thickness of eritieal covering layer is proposed based on analysis of theory and experiment. The code formula to calculate initial eccentricity ea can be revised when the column dimension is small, and a better result ean be obtained.
出处
《建筑结构》
CSCD
北大核心
2009年第6期34-38,28,共6页
Building Structure
关键词
残余荷载
长细比
临界保护层厚度
应变差值
偏心距增大系数
residual capacity
slenderness ratio
critical eovering layer
strain difference
enhancement coefficient of eeeentrieity
