等边单角钢轴心压杆局部稳定计算问题的讨论

CALCULATION INVESTIGATION OF LOCAL BUCKLING STABILITY FOR AXIALLY COMPRESSED SINGLE EQUAL LEG ANGLE MEMBERS

在钢结构工程中,特别是在输电线路的铁塔设计中,经常采用等边单角钢作为轴心受压构件。在设计计算中,无论是按照我国现行的GB 50017—2003《钢结构设计规范》,还是采用ASCE 10—1997《美国输电铁塔设计导则》,都需要考虑角钢肢宽与厚度之比的问题。针对此问题,根据弹性稳定理论,推导了等边单角钢轴心压杆宽厚比限值的计算公式,并提出设计计算的方法,供工程设计参考。

Single equal leg angles are usually used as axial compression members in steel structures, especially in transmission towers design. However, during design calculation, the ratio of steel angle edge width to its thickness will be a problem either using current Code for Design of Steel Structures （ GB 50017--2003 ）, or using Design of Latticed Steel Transmission Structures （ANSI/ASCE 10--97）. Based on the elastic stability theory, width to thickness ratio limitation computation was deduced for single equal leg angle axial compression members, and proposed design calculation methods were also proposed.