(1同济大学建筑工程系，上海200092；2西安建筑科技大学莱钢钢结构研发中心，710055)

［提要］运用数值分析方法研究了规范中考虑截面自由扭转惯性矩的简化整体稳定系数计算公式对国产热轧H型钢梁的适用性。对HN型高标号截面提出了修正公式，分析了规范GB50017—2003中当构件长细比小于120235/fy时采用的梁整体稳定系数近似计算公式对国产热轧H型钢梁的适用性。分析结果显示其过于保守，提出了更为精确的相对简化公式。

［关键词］轧制H型钢梁；稳定系数；扭转惯；简化公式；修正

Applicability Analysis of Simplified Numerical Method to Calculate Stabilization Coefficient of H-section Beams Used in New Design Code GB50017—2003/Gao Liya1,Deng Changgen1,Hao Jiping2(1 Tongji University,Shanghai 200092,China; 2 Xi’an University of Architecture and Technology,Xi’an 710055,China)

Abstract:The error distribution caused by the simplified torsion moment of inertia in the code GB50017—2003 is calculated for HN sections with higher heights using the numerical method, and a more reasonable formula is suggested. The applicability of simplification formulary for members with slenderness ratio less than 120235/fy is analyzed. It is indicated that this formulary is conservative and a more accurate simplified formulary is offered.

Keywords:rolled H-section beam; stabilization coefficient; torsion moment of inertia; simplification formulary; modification