Double-U-shaped prestressed composite beam and modular construction method: Fid-Bau Portal

Double-U-shaped prestressed composite beam and modular construction method

CHEN SHENGGANG / CHEN JIANGTAO / ZHUANG HONGJIE

The invention discloses a double-U-shaped prestress composite beam and a modular construction method.The composite beam comprises three composite web plates and a composite bottom plate, the bottoms of the composite web plates are fixedly connected with the composite bottom plate, the web plates are perpendicular to the composite bottom plate, and two composite web plates are installed at the two ends of the composite bottom plate; and the other combined web plate is mounted in the middle of the combined bottom plate. The combined web comprises a UHPC flange plate and a wave-shaped steel web I-shaped beam, and the wave-shaped steel web I-shaped beam comprises an upper flange U-shaped steel plate, a wave-shaped steel plate, an end bearing steel plate and a lower flange steel plate. The combined bottom plate comprises a UHPC bottom plate and a U-shaped steel bottom plate. The upper ends of the corrugated steel web I-shaped beams are fixedly connected with the UHPC flange plates through studs on the inner sides of the upper flange U-shaped plates, and the lower ends of the corrugated steel web I-shaped beams are fixedly connected with the UHPC bottom plate through I-shaped steel supporting shear keys. The composite beam structure is high in prestress efficiency, good in crack resistance and large in span, and modular machining and rapid prefabrication can be achieved.

本发明公开了一种双U型预应力组合梁及模块化施工方法，组合梁包括三块组合腹板和一块组合底板，组合腹板底部均与组合底板固定连接，腹板均垂直于组合底板，其中两块组合腹板安装于组合底板两端，另一块组合腹板安装于组合底板中间。组合腹板包括UHPC翼缘板和波型钢腹板工字梁，波型钢腹板工字梁包括上翼缘U型钢板、波型钢板、端承钢板和下翼缘钢板。组合底板包括UHPC底板和U型钢底板。波型钢腹板工字梁上端通过上翼缘U型板内侧栓钉与UHPC翼缘板固定连接，下端通过工字钢支撑剪力键与UHPC底板固定连接。本发明的组合梁结构预应力效率高，抗裂性好，跨度大，可实现模块化加工和快速预制。

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