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(1同濟(jì)大學(xué)建筑工程系，上海200092；2西安建筑科技大學(xué)萊鋼鋼結(jié)構(gòu)研發(fā)中心，710055)

［提要］運(yùn)用數(shù)值分析方法研究了規(guī)范中考慮截面自由扭轉(zhuǎn)慣性矩的簡(jiǎn)化整體穩(wěn)定系數(shù)計(jì)算公式對(duì)國(guó)產(chǎn)熱軋H型鋼梁的適用性。對(duì)HN型高標(biāo)號(hào)截面提出了修正公式，分析了規(guī)范GB50017—2003中當(dāng)構(gòu)件長(zhǎng)細(xì)比小于120235/fy時(shí)采用的梁整體穩(wěn)定系數(shù)近似計(jì)算公式對(duì)國(guó)產(chǎn)熱軋H型鋼梁的適用性。分析結(jié)果顯示其過(guò)于保守，提出了更為精確的相對(duì)簡(jiǎn)化公式。

［關(guān)鍵詞］軋制H型鋼梁；穩(wěn)定系數(shù)；扭轉(zhuǎn)慣；簡(jiǎn)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