- 摘 要
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（1 華東建筑設計研究總院， 上海 200092； 2 上海聯(lián)創(chuàng)建筑設計有限公司， 上海 200210）
［摘要］為使H型鋼簡支梁受扭正應力計算方便，通過對理論計算公式的分析，提出了抗扭特別截面模量Wt′的概念，并且在計算中引入H型鋼簡支梁截面模量Wx和抗扭特別截面模量Wt′的比值n1來簡化公式。針對我國熱軋H型鋼簡支梁的特點，以及常用跨高比下n1值的分析，提出了n1在各種情況下的估算公式和適用范圍。通過驗證說明n1值的估算公式是可以滿足H型鋼簡支梁受扭正應力值的估算需要。最后通過對我國常用熱軋H型鋼簡支梁的n1值計算，說明其數(shù)值大小是在一定范圍之內(nèi)，設計人員可根據(jù)此值，對H型鋼簡支梁受扭正應力計算有更直觀的認識。
［關(guān)鍵詞］H型鋼； 簡支梁； 受扭； 正應力； 截面模量比值
中圖分類號：TU392文獻標識碼：A文章編號：1002-848X(2017)15-0054-05
Discussion on the calculation method of the torsion normal stress in simply supported H-shaped steel beams
Sun Shuyu1, Zhang Li2
(1 East China Architectural Design & Research Institute, Shanghai 200092, China; 2 Shanghai United Architecture Design Co., Ltd., Shanghai 200210, China)
Abstract:In order to make the torsion normal stress of simply supported H-shaped steel beams be calculated conveniently, through analyzing the formula of theoretical calculation, the concept of torsional special section modulus Wt′ was proposed, and the ratio n1 of section modulus Wx and torsional special section modulus Wt′ was introduced for simplifying the formula. According to the characteristics of simply supported H-shaped steel beams and the analysis of n1 values in the span-depth ratio of common use, the estimation formula and application range of n1 were presented. It is proved that the estimation formula of n1 value is able to meet the need of the torsion normal stress of simply supported H-shaped steel beams. Finally through to the common hot-rolled simply supported H-shaped steel beams n1 values, indicating that the value is within a certain range, the designer can be on the basis of the value, a more intuitive understanding wound be take shape about the calculation of the torsion normal stress of simply supported H-shaped steel beams.
Keywords:H-shaped steel; simply supported beam; torsion; normal stress; ratio of section modulus
作者簡介：孫抒宇，本科，一級注冊結(jié)構(gòu)工程師,Email:shuyu-sun@126.com。
