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热轧H型钢是一种高效经济性型材,具有抗弯性能好、翼缘宽、侧向刚度大等优点。目前国内生产的H型钢有宽翼缘H型钢(HW),中翼缘H型钢(HM),窄翼缘H型钢(NH)和薄壁H型钢(HT)等,但GB50017—2003《钢结构设计规范》在描述保证梁的整体稳定性内容中,有关热轧H型钢的规定直接借用了轧制普通工字钢或三板焊接截面的相关条文,没有体现H型钢良好的截面特性对整体稳定性的贡献。为了使GB50017—2003能够更充分、准确地指导钢结构工程设计应用,区别处理H型钢梁与工字钢梁,了解和掌握适用于国产热轧H型钢的整体稳定控制条件是十分必要的。从梁整体稳定原理出发,依照现行GB 50017—2003提出的计算公式,通过专门的分析程序对H型钢梁整体稳定进行计算,结合重庆大学已经获得的研究工作结果,提出了更适合国产H型钢的整体稳定控制条件,可作为GB 50017—2003修订的依据,也可供工程应用实践参考。
H-beam hot-rolled is a highly efficient economy profiles, with good bending resistance, wide flange, lateral stiffness and other advantages. H-beams currently produced in China include wide-flange H-beams, middle-flange H-beams, narrow-flange H-beams and thin-walled H-beams. However, GB50017-2003 “ Design Code ”describes the overall stability of the beam to ensure that the provisions of the hot-rolled H-beam directly borrow the ordinary section of I-beam or three-plate welding of the relevant provisions of the section does not reflect the good cross-sectional properties of H-beam on the overall stability Contributions. In order to make GB50017-2003 more fully and accurately guide the design and application of steel structure engineering, to distinguish between H-beam and I-beam, it is necessary to understand and master the overall stability control conditions of domestic H-beam. Based on the principle of overall stability of beam, according to the calculation formula proposed in GB 50017-2003, the overall stability of H-beam is calculated through a special analysis program. Based on the research results obtained by Chongqing University, The overall stability control conditions, can be used as a basis for GB 50017-2003 revision, but also for engineering practice reference.