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    饒芝英    童根樹
    （浙江大學(xué)土木系  杭州 300027）

[提要]  根據(jù)現(xiàn)行《鋼結(jié)構(gòu)設(shè)計(jì)規(guī)范》( GBJ17-88)對(duì)一邊自由一邊與其他板件相連的板件的寬厚比限值來校核由H型鋼剖分的T形截面腹板的寬厚比，會(huì)發(fā)現(xiàn)很多截面都不滿足要求，這使得H型鋼的推廣應(yīng)用非常不利，與國外技術(shù)先進(jìn)國家的實(shí)際應(yīng)用也不一致。為此，對(duì)T形截面腹板的寬厚比從板件相互約束的角度進(jìn)行了研究，提出了相應(yīng)的寬厚比限值計(jì)算公式，供規(guī)范修訂和工程應(yīng)用時(shí)參考。
[關(guān)鍵詞]  鋼結(jié)構(gòu)T形構(gòu)件  局部穩(wěn)定  高厚比

The width-thickness ratio of T-shaped section web, which is split by H-shaped section steel members, is checked based on the current code Specification  for steel structure ( GBJ17-88). The results show that many T-shaped sections cannot be satisfied with the regulation of local stability. This paper studies the width-thickness ratio of T-shaped section web concerned with the mutual restraint of slabs. The formula of limit of width-thickness ratio is presented, which can be referred to revise the specification and apply in design.
Keywords:  steel structure; T-shaped section member; local stability; width-thickness ratio