JPS63315714A - Method for mounting steel floor panel to existing cross beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) The present invention provides a method for installing steel deck panels in the deck slab of a bridge structure, in particular, a method for installing steel deck panels on existing cross girders. Regarding how to install.

(Prior art) Steel bridge decks are generally constructed with RC deck slabs, and replacement of steel deck panels with RC decks is usually from main girder to main girder or from main girder to vertical girder. This was done by placing and fastening the vertical ribs of a steel deck panel.

For this reason, steel deck slabs have a groove structure that is stiffened from the bottom surface of the deck plate with vertical and horizontal ribs, and these stiffening ribs are joined to the deck plate by continuous fillet welding depending on the slab thickness. has been done.

(Problem to be solved by the invention) However, when joining the deck plate and the supplementary ribs, the welding process involves distortion, and the intersection of the vertical ribs and the horizontal ribs becomes the source of fatigue problems due to repeated loading. There is.

Therefore, forming stiffening ribs with only vertical ribs can solve this problem and has the advantage of reducing the dead load on the deck. However, simply omitting the horizontal ribs does not improve the rigidity. affect.

This problem can be solved by fastening vertical ribs on top of the existing cross girders, but the existing cross girders are subject to deflection and distortion of the upper surface of the flange, so the steel deck panels cannot be attached to the existing cross girders. If placed on top, a gap will be created between the steel deck panel and the top of the existing crossbeam.

The present invention is intended to solve all of the drawbacks caused by omitting the horizontal ribs of the steel deck panel.

(Structure of the Invention) (Means for Solving the Problems) The present invention provides vertical ribs of a steel deck panel from the main girder to the main girder or from the main girder to the vertical girder, which are normally done in conventional RC deck slabs. Rather than placing the steel deck panels on top of the existing cross girders, the steel deck panels are placed on top of the existing cross girders. The transverse girders and vertical ribs are placed so that they intersect and a gap is provided, an unevenness adjustment layer is provided in this gap, the existing transverse girders and vertical ribs are fastened together, and the ends of the steel deck panels are connected to the bridge. The above-mentioned problem is solved by attaching the steel deck panel to the existing cross beam, which forms a shear connector by connecting to the steel plate attached to the body.

(Function) By forming the auxiliary rib with only vertical ribs, fatigue of the welded part at the intersection of the vertical rib and the horizontal rib is reduced, and by being fastened to the crossbeam, the weakness of the auxiliary rule due to omitting the horizontal rib is reduced. Eliminate the problem. The problem of unevenness caused by attaching steel deck panels to the cross beams can be solved by using an unevenness adjustment layer.

(Example) Next, embodiments of the present invention will be described based on the drawings.

1 is a sectional view in the bridge axis direction, FIG. 2 is a sectional view taken along the line Δ-△ in FIG. 1, and FIG. 3 is a sectional view taken along the line BB in FIG. 1. In the drawings, 1 is a steel deck panel, 2 is a crossbeam, and 3 is an unevenness adjustment layer.

The steel deck panel 1 is composed of a deck plate 4 and a vertical rib 5, and the vertical rib 5 is welded to the lower surface of the deck plate 4 and is supplemented in the bridge axis direction. The crossbeam 2 is an existing one and has some flexure and distortion on the flange surface. 3 is an unevenness adjustment layer made of a resin material such as an epoxy resin adhesive or a hard rubber material.

The steel deck panel 1 and the crossbeam 2 are arranged so that the vertical ribs 5 of the steel deck panel cross over the crossbeam 2 to provide a gap in which the unevenness adjustment layer 3 is filled! placed.

The resin material forming the unevenness adjusting layer 3 is filled into the gap between the lower 7 flange 5a of the longitudinal rib 5 and the upper flange 2a of the cross beam 2 via a vibro as shown in FIG. This supports vertical forces. To deal with the lifting of steel deck panels, tighten them with bolts 7, etc.For horizontal forces acting on steel deck panels and the bridge body, as shown in Figures 5 and 6. A steel plate 9 attached to a bridge body, here a truss main structure 8, and a deck plate 4 of a steel deck panel 1 are connected by a splicing plate 10 and bolts 11 to form a shear connector.

In this way, the installation of the steel deck panels to the existing bridge girder is completed.

[-Effect of invention]

The present invention has significant effects as described above.

First, by forming the supplementary ribs with only vertical ribs, the problem of fatigue at the welded portion at the intersection of the vertical ribs and the horizontal ribs is alleviated. By being fastened to the existing bridge girder, the weakness of the supplementary rule, which eliminates the need for horizontal ribs, is resolved. Furthermore, the dead load can be reduced by omitting the horizontal ribs.

Next, the deflection of the existing cross girder and the distortion of the upper flange surface were dealt with by installing an unevenness adjustment layer, and the horizontal force acting on the steel deck panels and the bridge body was dealt with by installing a m′ attached to the bridge body. ! J
This problem was solved by connecting the ends of the plate and the steel deck panel with bolts, etc. to form a Shire connector.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention;
The figure is a sectional view taken from A- in Fig. 1, and a cross-sectional view taken from A- in Fig. 1;
8 is a sectional view, FIG. 4 is a partially enlarged sectional view explaining the unevenness adjustment layer, FIG. 5 is a sectional view in the bridge axis direction showing an example of connecting the bridge body and the steel deck panel, and FIG. FIG. 6 is a plan view of the connecting portion of FIG. 5; In the drawing, 1 is a steel deck panel, 2 is a crossbeam, 3 is an unevenness adjustment layer, 4 is a deck plate, 5 is a vertical rib, 7 is a bolt, 8 is a truss main structure (bridge body), and 9 is made of steel. It is a plate. Patent applicant Shobond Construction Co., Ltd. Patent attorney
Harumi UnoFigure 4Figure 5Figure 6

Claims (1)

[Claims] A steel deck panel whose lower surface of the deck plate is stiffened with vertical ribs is placed on the upper surface of the existing transverse girder so that the existing transverse girder and the vertical rib intersect, leaving a gap, and an unevenness adjustment layer is placed in this gap. established,
A steel deck panel on an existing transverse girder characterized by forming a shear connector by connecting the existing transverse girder and the vertical ribs and connecting the end of the steel deck panel to a steel plate attached to the bridge body. How to install.