摘要
国内外不锈钢材料力学性能的试验资料表明:不同牌号不锈钢材料的力学性能差别较大;同牌号不锈钢材料的力学性能也有一定差别,而材料力学性能变化对轴心受压不锈钢柱的稳定性系数的影响在国外典型不锈钢结构设计规范中均无明确的规定。基于经验证的有限元模型,计算了30种典型不锈钢材料的稳定系数曲线,采用修正正则化长细比概念对Perry公式及K&R公式进行改进,得到适用于常用不锈钢材料力学性能的轴心受压柱稳定系数表达式,并与国内外已有的试验数据进行对比,结果表明,此表达式具有较高的精度,可供我国不锈钢结构设计规程中轴心受压构件设计条文编制参考。
Test results of the stainless steel material property indicate that： considerable difference exists among different states of the same type stainless steel and also exists among varieties of type. However this difference is not directly considered in the typical design codes existing in the world. Based on the verified FEM model, total 30 column curves are calculated that covered the range of material properties in common use. The concept of modification slenderness ratio is utilized to modify the Perry formula and the K＆R formula; at last, new design formula is obtained for calculating the buckling strength of stainless steel columns. Comparisons between the available test resuh and the proposed approach are conducted. The comparisons indicated that the proposed approach could fit the test results well. This approach could be used as a reference for the first version of stainless steel design code of China.
出处
《工业建筑》
CSCD
北大核心
2012年第5期21-28,共8页
Industrial Construction
基金
江苏省自然科学基金资助项目(BK2009287)
国家自然科学基金资助项目(51178098)
关键词
不锈钢
冷成型管材
轴心受压长柱
计算方法
stainless steel
cold - formed tubular member
long columns under axial load
design method
