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寧海永，張 寧，唐開春
（中國紡織工業(yè)設(shè)計院，北京100037）[摘要] 在非動力荷載直接作用的鋼結(jié)構(gòu)工程中，當梁腹板高厚比較大時，一般要考慮腹板屈曲后強度。文中詳細論述了屈曲后強度的適用條件、機理和有效剛度計算方法，文中的計算方法與《鋼結(jié)構(gòu)設(shè)計規(guī)范》(GB50017--2003)中的計算方法進行比較，計算結(jié)構(gòu)基本一致，能滿足工程設(shè)計的精度要求，對實際工程設(shè)計具有參考意義。
[關(guān)鍵詞] 屈曲后強度；鋼結(jié)構(gòu)；局部穩(wěn)定；有效剛度Simple calculation of H-shaped section beam post-buckling strength
Ning Haiyong, Zhang Ning, Tang Kaichun
(China Textile Industrial Engineering Institute, Beijing 100037, China)Abstract: According to the flexural beam in steel buildings, if it's without dynamic loading, and when the web slenderness ratio of beam is bigger, the post-buckling strength of web plate should be considered. in this article, the applicable condition, mechanism and the post-buckling effective stiffness will be discussed. Comparing it with the method in the code for design of steel structures( GB 50017-2003) of china, the results are approaching basicallylt can be reference for the practical engineering design.
Keyword: post-buckling strength; steel structure; local stability effective stiffness
