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（湖南文理學(xué)院機(jī)械工程學(xué)院， 常德 415000）

［摘要］在考慮剪力影響的基礎(chǔ)上，推導(dǎo)了工字型鋼梁的彎曲正應(yīng)力公式，討論了工字型鋼梁截面跨高比變化時(shí)剪力對(duì)其彎曲正應(yīng)力的影響。研究結(jié)果表明：隨著跨高比的增大，剪力對(duì)彎曲正應(yīng)力的影響逐漸減??；且剪力對(duì)工字型鋼梁腹板最大彎曲正應(yīng)力的影響較大。

［關(guān)鍵詞］剪力； 工字型鋼梁； 彎曲正應(yīng)力； 跨高比

中圖分類(lèi)號(hào)：TU391, O341文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)04-0107-03

Study on effect of shear force on bending normal stress of web plate of I-type steel beam

Wu Xiao, Liu Qiyuan

(College of Mechanical Engineering, Hunan University of Arts and Science, Changde 415000, China)

Abstract:On the basis of considering the effect of shear force, the formula of bending normal stress of I-type steel beam was deduced, and the effect of shear force on bending normal stress of I-type steel beam when the span-height ratio of cross-section changes was discussed. The results show that with the increase of span-height ratio, the effect of shear force on the bending normal stress decreases gradually, and the effect of shear force on the maximum bending normal stress of I-type steel beam web plates is greater.

Keywords:shear force; I-type steel beam; bending normal stress; span-height ratio

*湖南省科技計(jì)劃項(xiàng)目(湘財(cái)企指［2011］65號(hào))，湖南省“十二五”重點(diǎn)建設(shè)學(xué)科資助項(xiàng)目(湘教發(fā)2011［76］)。

作者簡(jiǎn)介：吳曉，學(xué)士，教授，Email:wx2005220@163.com。