摘要
对单边连接等边角钢进行受压试验及有限元模拟分析,得到中点截面应变片的应力-应变关系曲线,轴向压应力-轴向应变关系曲线,轴向压应力-中点挠度关系曲线,中点截面扭转角-长细比关系曲线,以及整体稳定系数-长细比关系曲线。试验结果与有限元模拟结果有很好的一致性。试验发现,在试件达到受压极限承载力时,试件中点截面变形主要还是以绕平行于角钢连接边轴线弯曲变形为主,中点截面扭转变形很小。从整体稳定系数-长细比关系曲线看出,由GB 50017—2003《钢结构设计规范》计算的整体稳定系数比试验及有限元分析的结果小很多,说明GB 50017—2003对此类连接角钢构件的计算方法是偏于保守的。
Unilateral-connected equilateral angles were tested and analyzed by finite element simulation method. The stress-strain curve of strut mid-point section strain gauge,the average axial stress-axial strain curve,the average axial stress-mid-point deflection curve, the mid-point section torsion angle-slenderness ratio curve and integral stability coefficient-slenderness ratio curve were obtained. The results of test and finite element analysis were found to be in good agreement. It had been observed that when specimens reached ultimate bearing capacity,the mid-point section mainly generated bending deformation about one axis line parallel to the angle steel connection leg and did small torsion deflection.The comparisons of integral stability coefficient-slenderness ratio curve suggested that the integral stability coefficients calculated by GB 50017—2003 was smaller than the results of test and finite element analysis,which showed that design method for this kind of connection angle steel in GB 50017—2003 was conservative.
作者
李文斌
陈剑平
林光龙
贺启
林俊哲
刘树堂
熊国文
LlWenbin;CHEN Jianping;LIN Guanglong;HE Qi;LIN Junzhe;LIU Shutang;XIONG Guowen(Guangdong Power Transmission and Transformation Engineering Co.Ltd,Guangzhou 510160,China;Guangdong Power Grid Co.Ltd,Jiangmen Power Supply Bureau,Jiangmen 529000,China;Guangzhou University,Guangzhou 510006,China)
出处
《钢结构》
2018年第8期24-28,共5页
Steel Construction
基金
广东电网科技项目(GDKJQQ20161073)
关键词
等边角钢
偏心受压
整体稳定性
试验研究
equilateral angle steel
eccentric compression
overall stability
experimental research
