通过对焊接工字梁腹板屈曲后强度的理论分析及试验研究，得出了一些对规范修订有重要参考价值的结论。
For the code revising, some important conclusions have been drawn through the theoretical analysis and experimental research of the post-buckling strength of web plates of I-section girder.
目前，吊车轮压荷载作用下工字梁腹板的局部屈曲鲜有研究，这主要是由于无法得到轮压荷载作用下承压应力在腹板内的分布规律。
The local buckling of web plates in I-girders under wheel loading has been rarely investigated, due to the unknown distribution of bearing stresses in the web plates.
在纯弯或纯剪分别作用下的工字形焊接板梁，在弹性范围内腹板屈曲时，翼缘会对腹板起约束作用。
When a welded I-section plate girder is subjected to bending or shearing, buckling of web in elastic range will be restrained by flanges.
桥式起重机采用工字形截面作为主梁，使用多年后该结构形式的主梁上翼缘板和腹板连接的主焊缝及母材多处产生裂纹，甚至发生主梁断裂事故。
Cracks occurred in the main weld joining the web and upper wing panel of an overhead crane girder of I-section, some of which have expanded to the structure material and even led to girder fracture.
桥式起重机采用工字形截面作为主梁，使用多年后该结构形式的主梁上翼缘板和腹板连接的主焊缝及母材多处产生裂纹，甚至发生主梁断裂事故。
Cracks occurred in the main weld joining the web and upper wing panel of an overhead crane girder of I-section, some of which have expanded to the structure material and even led to girder fracture.
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