KR20040097047A - wave shaped panel composition structure of steel box girder - Google Patents

Abstract

PURPOSE: A wavy steel plate composition structure of a steel box girder is provided to reduce section by increasing bending moment, shear strength and distortion moment, to simplify a progress, to increase durability and to cut down the materials and manpower by reducing the defect on a welded part. CONSTITUTION: The wavy steel plate composition structure of a steel box girder comprises the steps of welding a welding stud bolt to a flat steel plate, manufacturing a wavy steel plate having rugged shapes additionally, perforating a welding hole of a welding stud bolt and a painting or filling hole of the rugged space, then assembling the welding stud bolt with the welded flat steel plate, manufacturing a steel panel having a closed pace by welding with welding stud bolts, filling up the closed space of a convex part of the steel panel with filler, and manufacturing/assembling/welding many composite reinforcement panels whose section is reduced by increasing bending moment, shear strength and distortion moment.

Description

Wave shaped panel composition structure of steel box girder

The present invention relates to a mold structure of a steel box-shaped bridge, and more particularly, the upper and lower flanges and the left and right two abdominal plates, which are the main components of the steel box-type mold, are made of flat steel plates and bridges and the cross-sectional force due to stress acting on each section. According to the size of the corrugated steel sheet, the shape, quantity and direction of the corrugated steel sheet are adjusted and arranged.The combination of corrugated steel sheet is made by stud bolt welding. Increased simplification and durability of steel box-type mold fabrication by forming, assembling, and welding a number of composite reinforcement plates with increased rigidity by filling and hardening the filler in the sub-closed space to form steel box upper and lower flanges and left and right abdominal plates. The present invention relates to a steel box type composite reinforced panel mold.

In general, a bridge of a conventional steel box mold has a thin structure using a thin plate on the upper and lower flanges (1 and 2 in FIG. 1) and the left and right abdominal plates (3 and 4 in FIG. 1) in comparison to width and height. The closed cross section formed by this resists bending moments, shear forces, and torsional moments, and also prevents local buckling of the compression flanges by using longitudinal ribs (7, 8 in FIG. 1) and horizontal vertical stiffeners (5, 6 in FIG. 1). In order to prevent bowing due to elastic deformation during bending or torsion moment, diaphragms are installed at intervals of 6m or less.

However, the structure is welded to form a flat steel plate in the upper and lower flanges and the left and right abdominal plate to form a cross-sectional square shape and welded longitudinally ribs and vertical horizontal reinforcement in a grid shape to maintain the rigidity In this case, the longitudinal ribs and the horizontal vertical reinforcement are cut to the standard, processed by fabrication, assembled, and then welded to many places, which takes time, air, and excessive manpower and cost.

In order to solve the problems of the prior art as described above, the present invention uses a flat steel plate of the upper and lower flanges of the steel box-type mold and the closed cross-sectional thin-walled structure of the left and right abdominal plates to reinforce the corrugated steel plate bent into a wave shape having an uneven structure. Increase the cement, shear force, and torsional moment to reduce the cross section, and in the manufacturing process, the complicated process of cutting vertical and horizontal rib horizontal vertical stiffeners and surface treatment according to the magnitude of the cross-sectional force due to the stress applied to each section of the mold By adjusting the size, quantity and direction of the plate irregularities, the upper and lower flanges and the left and right abdominal plates are assembled with flat plate and corrugated steel plate and welded with welding stud bolts to fill the filler in the closed uneven space of the plate steel plate and corrugated steel plate. Improved to provide steel box molds with smaller cross section than existing molds.

1 is a cross-sectional view of a conventional steel box mold

Figure 2 is a cross-sectional detail view of the composite reinforcing plate of the steel box mold according to the present invention

Figure 3 is the stress generated during the stud bolt bonding of the flat plate and corrugated steel sheet of the present invention

Figure 4 is an exploded perspective view of the welding stud bolt joint of the flat plate and corrugated steel sheet of the present invention

5 is a perspective view of a composite reinforcement panel of the flat plate and corrugated steel sheet of the present invention

Figure 6 is a perspective view of the abdominal plate production of the composite reinforcing plate of the present invention

Figure 7 is a perspective view of the flange and the abdominal plate manufacturing example of the composite reinforcing plate of the present invention

Figure 8 is a perspective view of the mold assembly assembly of the composite reinforcing plate of the present invention

Figure 9 is a perspective view of the use of the synthetic reinforcement mold of the present invention

In the present invention, the components and objects of the present invention will be described with reference to the accompanying drawings as to improve the design and construction problems of the existing steel box mold as described above. The present invention is a combination of a flat plate steel plate 100 of the flange or abdominal plate and the corrugated steel plate 200, which is a vertical and horizontal rib or horizontal vertical reinforcement alternative material to the welding stud bolt (300, 320, 330) and the corrugated steel plate irregularities as a welding and connecting material It consists of a hole for welding welding stud bolt (210, 220 of Fig. 2), an inlet for filling the uneven space filling material (230 of Fig. 3), the filling material 400 of the uneven space of the corrugated steel sheet. Same as

The flat plate 100 forms the basic structure of the upper and lower flange plate or the left and right abdomen plate, the corrugated steel sheet 200 is the size and quantity of the unevenness according to the size of the cross-sectional force due to the stress acting in each section of the mold Concave-convex is produced by cutting and pressing three-dimensionally according to the shape and shape of the design, and the corrugated steel sheet reduces the weight by reducing the weight of the flange and the abdominal member, improves the shear buckling strength and minimizes the welding while improving productivity. It can reduce the impact of welding member, reduce the fatigue effect of the welding member, and freely follow elastic deformation, creep, drying, shrinkage, etc. when it is combined with the filling material. Can be.

In addition, the protruding head welding stud bolt (300 in FIG. 2) is welded to the plate steel plate (100 in FIG. 2) of the main member, and the welding stud bolt of the main member at regular intervals to the corrugated steel plate (200 in FIG. 2) as the secondary member. (2, 300, 320, 330 in Fig. 2) and the hole for inserting the filler (210, 220 in Fig. 2) and the hole (230 in Fig. 2) to insert the filler to protrude the flat plate 100 and the corrugated steel sheet 200 Protruding head welding stud in the welded hole of the corrugated steel plate recess hole (220 in FIG. 2) and the corrugated steel plate protrusion after assembling the secondary welding stud bolt (300) and the uneven part hole (210, 220 in FIG. 2). In addition to the bolt (300 in FIG. 2) head (302 in FIG. 2), a hemispherical head welding stud bolt (320 in FIG. 2) is welded and welded to the end of the corrugated steel plate on the plate steel plate (500 in FIG. 2). Action is ensured. Welding stud bolts (300, 320, 330), which is a connecting composite of the flat steel plate 100 and the corrugated steel plate 200, have excellent fusion with the base material, sufficient tensile strength and guaranteed load, short welding time, and The heat affected zone of the weld metal is very narrow, so the deformation of the base material is very small, there is no need for back-treatment on the back of the base material, the reliability of leakage can be improved even when welding to the pressure vessel, and the alloy or different materials can be welded. The welding stud bolt (300 in FIG. 2) for connecting welding of the protrusion of the corrugated steel plate is composed of the protruding head (302 in FIG. 2) and the protruding NECK (301 in FIG. 2), and the welding stud bolt welded to the flat plate The protruding NECK is placed on a flat plate with a corrugated steel plate and additionally welded with the corrugated steel plate by forming a sealed space to prevent the melted water from flowing down the hemispherical head welding stud bolt tip when welding the hemispherical head welding stud bolt (320 in FIG. 2). Synthesis is performed, and the joint protrusion head 302 (FIG. 2) further welds the hemispherical head welding stud bolt (320 in FIG. 2) to form a composite panel of the flat steel plate and the corrugated steel plate. Hardening of the fill material by adding liquid fillers (400 in FIG. 2) such as cement and non-condensation mortar or admixture into the filling inlet (230 in FIG. 2) into the closed space of the corrugated irregularities formed in the synthesized composite panel (FIG. 2). To increase the compressive force and fabricate composite panels per unit (Fig. 5) to improve the restraint effect of each steel plate and filler material by combining the shear studs with the welding stud bolt and the filler material. After assembling with the abdominal plate and welded along the abutment line to complete the steel box-type composite reinforcement panel mold (Fig. 9) per unit.

Figure 3 shows the stress generated during welding stud bolt joining of the flat plate and the corrugated steel sheet of the present invention as a flat plate steel plate (90 in Figure 3) of the flange of the bottom frame element of the mold and the corrugated steel sheet (91 in Figure 3) as longitudinal ribs This closed cross-section rib structure is advantageous in case of large axial compressive force acting as a reaction force (R) by welding welding stud bolts (92, 93 in Fig. 3) of the main vertical reinforcement and closed cross-section ribs. Since the lateral distribution action by σ of FIG. 3 is good and the simple torsional rigidity (τ of FIG. 3) is large, the buckling stability is high and the lateral rib spacing can be increased. The shear stress distribution is an example obtained by the calculation method according to the thin bending theory, and the bending torsion is an example of calculating the bending torsional secondary stress due to the eccentricity of the bow load by the bending torsion theory of the thin structure.

The manufacturing method per unit of the upper and lower flanges (10 and 20 of FIG. 9) and the left and right abdominal plates (30 and 40 of FIG. 9) of the present invention will be described as illustrated. Cut according to the size per unit for the flange (100 in Fig. 7), left and right abdominal plate (100 in Fig. 6), and design a number of protruding head welding stud bolts (300 in Figs. 6 and 7) on the flat plate at regular intervals. Flat plate steel plate is produced per unit by welding with welding stud bolt welding machine and gun at a certain position, and the size, quantity, direction, and shape of the unevenness according to the size of the cross-sectional force due to the stress acting on each section of the mold. To make a corrugated steel sheet (200 in Figs. 6 and 7) to be added to a flat plate steel sheet, and then weld stud bolt protrusion head (Fig. 2) at a predetermined position on each corrugated steel sheet. Less than 302) Compared to NECK (301 in Fig. 2), the welding hole bolt (300, 310, 320) for attaching the flat plate and the corrugated steel plate to the uneven part is automatically attached and the refill hole (210, 220 in Fig. 6) for the uneven space ( 2, 6 of 230 is drilled to form a corrugated steel sheet (200 of FIGS. 6, 7) per unit. Welding to connect the corrugated steel sheet 200, which is an auxiliary member, to the protruding head welding stud bolt 300 on the plate steel plate 100 of the main member per unit manufactured as described above Through holes (210 in Fig. 6) for attaching the stud bolt (300) and the protruding head welding stud bolt (300) are assembled in the same manner, and then into the corrugated sheet concave hole and the corrugated steel plate protruding head type welding stud bolt (300) head. In addition, a hemispherical head welding studbolt 320 is welded, and a hemispherical head welding stud bolt (330 in FIG. 2) is welded into the recess hole 220 of the assembled corrugated steel sheet (FIGS. 6 and 7). To produce. A large number of these composite plates are made of upper and lower flanges and left and right abdominal plates, assembled by a crane (Fig. 8), and after assembly, the joints are welded to produce a composite reinforced structural steel box mold (Fig. 9). At this time, the bending direction of the corrugated steel sheet of FIG. 7 (200 in FIG. 7) is assembled by the corrugated steel sheets of the upper and lower surfaces at right angles, and according to the magnitude of the unevenness according to the magnitude of the cross-sectional force caused by the stress acting on each section of the mold. The example which cut | disconnected the direction and shape according to the design by the cutting press bending three-dimensional process, and put on the flat plate steel plate was shown. Filler (400 in FIG. 2) is filled with a filler inlet into the closed space of the corrugated irregularities formed in the unit composite panel (FIG. 4) of the flat steel plate and the corrugated steel sheet (FIG. 4) of the composite reinforced structural steel box mold (FIG. 9). To complete the steel box-type composite reinforcement mold (Fig. 9). 8 and 9 illustrate an example in which the corrugated steel sheet is combined and implemented in accordance with the design of the uneven direction according to the magnitude of the cross-sectional force caused by the stress acting on each section of the mold.

The present invention fills the filling material by the welded connection combination structure of the corrugated steel plate bent in flat plate and concave-convex structure by welding stud bolt, bending moment, shear force, torsional wear by replacing the vertical and horizontal ribs with vertical and horizontal ribs The increased cross section reduces the cross-section, the reduction of welds and weld defects increases the simplification and durability of the manufacturing process, and saves material and manpower. In addition, it can be easily reinforced by additional reinforcement method when the durability of existing installed steel bridges is reduced.

Claims (3)

In the bridge structure of the steel box type mold, the welding stud bolt (300 in FIG. 2) is welded to the plate steel plate 100, and the corrugated steel plate 200 bent into a corrugated shape having an uneven shape is further manufactured for welding stud bolt welding. After drilling the hole (210 in FIG. 2) and the uneven space for painting or filling the hole (230 in FIG. 2), the welding stud bolt (300 in FIG. 2) is assembled with the welded flat plate 100, and the welding stud bolt Welded to (320, 330) to produce a composite steel panel (FIG. 5) in which a closed space is formed, and filled with the filling material (400 in FIG. 2) in the closed space of the convex portion formed by the corrugated steel plate irregularities of the steel panel. In order to increase the bending moment, shear force and torsional moment, a number of composite reinforcing panels with reduced cross-sections were fabricated, assembled and welded, respectively, to form upper and lower flanges (10 and 20 in Fig. 8) and left and right abdominal plates (Fig. 8 and 30, Fig. 8). Simplify the process and increase durability with steel box mold making Composite reinforcement structure of steel box type mold to make. The method according to claim 1, wherein the size, quantity, direction, and shape of the irregularities are cut and pressed according to the magnitude of the cross-sectional force due to the stress acting on each section of the mold when the corrugated steel sheet 200 is bent into the wavy shape having the irregularities. A composite reinforcing structure of a steel box mold, characterized by forming a corrugated steel plate 200 having been bent three-dimensionally and forming a steel box mold upper and lower flanges and a left and right abdominal plate (FIG. 8). The method of claim 1, wherein the protruding head welding stud bolt (300 in Fig. 2) and the hemispherical head welding in the shape of a welding stud bolt for the composite reinforcement fabrication of the plate steel plate and the corrugated steel sheet bent into a corrugated shape having a concave-convex shape Synthetic reinforcement structure of steel box mold, characterized in that the steel panel is manufactured by welding and jointed with stud bolt (320, 330 of Figure 2) to form a steel box upper and lower flange and left and right abdominal plate.