The structure of thin-walledbox girders are commonly applied in some large span continuous beam bridges and rigid frame bridges in our country.
我国已建成的一些大跨径连续梁桥及大跨径连续刚构桥都普遍采用薄壁箱形截面。
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In this paper, for the thinwalled linear strengthened steel boxbeam, the strength and valid width ratio of flange is investigated under the condition of elastoplastic limit state.