Jack type corrugated steel web prestressed composite beam: Fid-Bau Portal

Jack type corrugated steel web prestressed composite beam

WAN SHUI / HUANG MUYUN / LI CHAOJUN / YUAN FENG / ZHANG YUBO

The invention discloses a jack type corrugated steel web prestressed composite beam, which relates to the technical field of bridge construction, and comprises a concrete top plate, a concrete bottom plate and a steel beam arranged between the concrete top plate and the concrete bottom plate, the steel beam comprises an upper flange flat steel plate, a lower flange flat steel plate and a corrugated steel web arranged between the upper flange flat steel plate and the lower flange flat steel plate, and perforated rib plates, prestressed tendons, prestressed tendon anchoring devices and jack devices are arranged on the two sides of the steel beam in the width direction. Loads are applied to the prestressed tendons through the jack devices arranged on the corrugated steel webs, the prestress level of the composite beam structure can be adjusted in real time, prestress loss in the using process can be effectively made up, construction is convenient, and the durability of the structure is improved.

本发明公开了一种千斤顶式波形钢腹板预应力组合梁，涉及桥梁施工技术领域，所述组合梁包括混凝土顶板、混凝土底板及混凝土顶板与混凝土底板之间设有的钢梁，所述钢梁包括上翼缘平钢板、下翼缘平钢板及上翼缘平钢板与下翼缘平钢板之间设有的波形钢腹板，所述钢梁宽度方向两侧均设有带孔肋板、预应力筋、预应力筋锚固装置及千斤顶装置。本发明通过波形钢腹板上设置的千斤顶装置向预应力筋施加荷载，可以实时调节组合梁结构的预应力水平并针对使用过程中的预应力损失做出有效的弥补，施工较为方便，结构的耐久性得到提高。

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