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Prestress construction method for combined steel beam
The main process of the combined steel beam prestress construction method comprises the steps of pre-bending of a combined steel beam, pouring of prefabricated concrete and tensioning of prestressed tendons. Wherein the combined steel beam is composed of the lower section steel and the auxiliary section steel which are fixed through bolts, and in the pre-bending process, due to the fact that the combined steel beam has higher rigidity, the midspan deflection in the pre-bending process can be greatly reduced, and the effects of small deflection and high stress are achieved; after the two are bound, the position of the neutral shaft moves upwards, the area of an effective pre-pressing area is increased, the concrete prefabrication rate is improved, and the site construction amount is reduced. In addition to the most basic double-linear combination mode, the invention also provides a double-arch combination mode and a big-end-up combination mode which are respectively used for solving the problem of overlarge deflection caused by large span and the problem of lower height of a small steel beam prepressing area.
一种组合钢梁预应力施工方法，其主要流程包括：组合钢梁的预弯、预制混凝土的浇筑、预应力筋的张拉。其中组合钢梁由下部型钢和辅助型钢构成，二者通过螺栓进行固定，在预弯过程中，因其具有更高的刚度，能够大大减小预弯过程中跨中的挠度，达到小挠度高应力的效果；且二者绑定后，中和轴位置上移，有效预压区面积增加，混凝土预制率提高，现场施工量降低。除最基本的双直线型组合方式外，本发明还给出了双拱型组合方式和上大下小型组合方式，分别用于解决大跨度造成的挠度过大问题以及小型钢梁预压区高度较低的问题。
Prestress construction method for combined steel beam
The main process of the combined steel beam prestress construction method comprises the steps of pre-bending of a combined steel beam, pouring of prefabricated concrete and tensioning of prestressed tendons. Wherein the combined steel beam is composed of the lower section steel and the auxiliary section steel which are fixed through bolts, and in the pre-bending process, due to the fact that the combined steel beam has higher rigidity, the midspan deflection in the pre-bending process can be greatly reduced, and the effects of small deflection and high stress are achieved; after the two are bound, the position of the neutral shaft moves upwards, the area of an effective pre-pressing area is increased, the concrete prefabrication rate is improved, and the site construction amount is reduced. In addition to the most basic double-linear combination mode, the invention also provides a double-arch combination mode and a big-end-up combination mode which are respectively used for solving the problem of overlarge deflection caused by large span and the problem of lower height of a small steel beam prepressing area.
一种组合钢梁预应力施工方法，其主要流程包括：组合钢梁的预弯、预制混凝土的浇筑、预应力筋的张拉。其中组合钢梁由下部型钢和辅助型钢构成，二者通过螺栓进行固定，在预弯过程中，因其具有更高的刚度，能够大大减小预弯过程中跨中的挠度，达到小挠度高应力的效果；且二者绑定后，中和轴位置上移，有效预压区面积增加，混凝土预制率提高，现场施工量降低。除最基本的双直线型组合方式外，本发明还给出了双拱型组合方式和上大下小型组合方式，分别用于解决大跨度造成的挠度过大问题以及小型钢梁预压区高度较低的问题。
Prestress construction method for combined steel beam
一种组合钢梁预应力施工方法
YU YUNLONG (author) / HE JIUZHOU (author) / YANG YONG (author) / XUE YICONG (author) / FENG SHIQIANG (author)
2022-04-29
Patent
Electronic Resource
Chinese
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