JPH05272103A - Steel floor plate - Google Patents

Abstract

PURPOSE:To mitigate the shock and reduce the vibration and noises when a vehicle is traveled, reduce weight increase, facilitate handling, and improve economical efficiency. CONSTITUTION:Striped groove shape steels 3 are arranged and welded in the lateral direction, L shape steels 4 are welded on both side faces, a CT shape steel, 5 is welded at the center, and a steel floor plate 1 having a nearly box- shaped cross section opened on the lower face is manufactured. A synthetic resin foam body 2 such as styrol foam or urethane foam is filled and integrated in a void section inside the steel floor plate 1. The load applied to the floor plate is dispersed by the synthetic resin foam body 2, the stress concentration to a steel member is prevented, the shock is mitigated, and the vibration and noises are reduced by the energy absorption of the synthetic resin foam body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel lining slab, a work slab for supporting heavy objects, or a steel floor slab used for floor boards, vehicle piers, and the like.

[0002]

2. Description of the Related Art As a conventional steel floor slab, for example, as disclosed in Japanese Utility Model Publication No. 55-27296, steel such as H-section steel, steel top plate, steel reinforcing plate and the like. There are things such as assembled parts made by welding or bolt joining,
Generally, a space is formed between the upper surface and the lower surface of the steel floor slab so that the steel floor slab is relatively lightweight and has a predetermined rigidity.

In addition, Japanese Utility Model Publication No. 50-30192,
In Japanese Utility Model Laid-Open No. 57-66007, there is also a steel floor slab having an upper surface plate paved, but the main purpose thereof is to make it difficult for a vehicle or the like to slip during traveling.

[0004]

The conventional steel floor slab has the following problems.

When a vehicle or the like travels on a floor slab or a person walks on it, vibration and noise generated from the floor slab are larger than those of a concrete floor slab.

Repetitive external force caused by running of a vehicle or the like on the floor slab tends to cause fatigue fracture in the welded part of the steel floor slab due to local stress concentration. In addition, the structure of only the steel member does not have the effect of mitigating the impact external force of the vehicle or the like.

As one of the solutions to the above problems, there is a method of increasing the rigidity of a steel floor slab, but there are problems such as uneconomical and difficult handling due to an increase in steel weight.

The present invention is intended to solve the above-mentioned problems in the prior art, and is capable of mitigating shock, vibration and noise when a vehicle or the like runs on a floor slab, and reducing the weight of the floor slab. The purpose of the invention is to provide an economical steel floor slab structure that does not increase significantly.

[0009]

Means for Solving the Problems The present invention is one in which a synthetic resin foam such as Styrofoam or urethane foam is filled and installed in a void portion of a steel floor slab of a predetermined thickness mainly composed of steel members, It is possible to significantly reduce the noise and vibration generated from the floor slab due to the step difference when the vehicle is running.

By filling the synthetic resin foam with the upper and lower surfaces of the steel floor slab, the synthetic resin foam is also deformed along with the deformation of the steel members of the steel floor slab. Since foams have excellent energy absorption capacity against deformation, and can be expected to have compressive strength equal to or higher than that of earth and sand, they contribute to the early damping of vibration and noise, while suppressing the overall system of the floor slab and local deformation. Based on.

Further, by filling the respective voids of the steel floor slab with a synthetic resin foam to reduce the impact and disperse the load, stress concentration is prevented from occurring, and the welded portion of the steel member or the portion where the cross section changes abruptly. It is possible to suppress the occurrence of fatigue fracture of.

Synthetic resin foam such as styrofoam and urethane foam is a lightweight material and has a density of about 1/250 of that of steel members. Even if it is filled in the floor slab cavity, the weight does not increase and the handling is improved. The above is the same as the current situation and there is no particular hindrance.

The filling and installation of the synthetic resin foam into the void is
It can be molded into a predetermined shape or packed into a shape, but it is easy to fill even if the void has a complicated shape, etc. can do.

The steel floor slab has a top plate, a bottom plate, and the like, and side plates attached to the four sides to form a six-sided hermetically sealed type. If the hermetically sealed internal space is filled with synthetic resin foam, it is contained. Since the obtained synthetic resin foam effectively works as a compression material in the triaxial compression stress state, it greatly contributes to suppressing the deformation of the entire floor slab.

Further, instead of the synthetic resin foam, it is also conceivable to fill foam mortar or foam concrete having higher strength. Foamed mortar is, for example, a mixture of a foaming agent such as aluminum powder in mortar, and a molded product with low specific gravity and relatively high strength is obtained, which is filled in the voids of a six-sided hermetic steel floor slab. Then, by curing, with high strength without significantly increasing the floor slab weight,
It is possible to manufacture a steel floor slab that is less deformed and has excellent vibration and noise reduction effects.

[0016]

EXAMPLES Next, the illustrated examples will be described.

In the embodiment shown in FIG. 1, a steel floor slab 1 as an ordinary lining slab is filled with a synthetic resin foam 2 such as styrofoam or urethane foam, without increasing the weight.
Vibration and noise can be reduced.

FIG. 1 (a) is a view as seen from the front. In this embodiment, as the top plate 1a, striped grooved steels 3 having striped projections formed on the top surface are welded side by side. By welding the L-shaped steel 4 and the CT-shaped steel 5 in the center, the steel floor slab 1 having a substantially box-shaped cross section with an open lower surface is formed. When viewed from the back side, as shown in FIG. 1 (b), horizontal ribs 6 are provided in the lateral direction of the striped channel steel 3, and the lower surface is provided with a connecting material 7 and a slip stopper 8 also serving as a connecting material, and a rubber pad 9 Etc. are attached.

The synthetic resin foam 2 is filled in the voids of the steel floor slab 1 having a substantially box-shaped cross section. As a method of filling, the formed products may be sequentially pushed in, or the steel floor slab may be pressed. Alternatively, a method of filling the steel member of No. 1 as a part of the mold in an unmolded state and hardening while foaming it may be used.

The synthetic resin foam 2 is deformed along with the deformation of the steel member of the lining plate, and the deformation energy absorbs energy related to vibration and noise.

The embodiment shown in FIG. 2 is also a steel floor slab 1 as a lining plate.
In the figure, 10 is an end stiffening material, and 11 is a hanging hole for lifting with a crane or the like.

FIG. 3 shows still another embodiment as a lining plate. In addition to the top plate 1a, a bottom plate 1b, side plates 1c on both sides, and front and rear side plates 1d are provided to form a six-sided completely sealed type. There is. In FIG. 3 (b) seen from the back side, 12 is a filling hole, 1
Reference numeral 3 is an air vent hole, and in this embodiment, the foam mortar 14 is filled from the filling hole 12 to increase the strength of the lining plate. In addition, in the case of the same 6-sided completely sealed type, as shown in FIG.
Also, as in the embodiment of FIG. 2, a synthetic resin foam may be filled.

FIG. 4 shows an embodiment in which the steel floor slab of the present invention is applied to a floor plate for soft ground. Compared with the case of the lining plate, the synthetic resin foam 22 is formed on the lower surface of the steel floor slab 21 having a simple structure in which striped grooved steel 23 is connected in the lateral direction.
It has a structure in which a space is attached to fill the voids, and buoyancy is also obtained on soft ground. In the figure, 24 is a hanging hole, and 25 is a lateral hole for connection.

FIG. 5 shows an embodiment in which the steel floor slab of the present invention is applied to a floor slab of a vehicle pier. A synthetic resin foam 32 is provided inside a steel floor slab 31 having a structure in which striped channel steels 33 are laterally connected and a bottom plate 31b is welded to the lower surface.
Is being filled. In this case, because of the sandwich plate structure, vibration and noise generated from the plate due to running of the vehicle or the like can be significantly reduced as compared with the case where the synthetic resin foam 32 is not filled. In the figure, 34 is a hanging hole, and 35 is a lateral hole for connection.

[0025]

[Effects of the Invention] By filling and installing the synthetic resin foam or the foam mortar in the voids, the noise and vibration generated from the floor slab due to the steps and the like when the vehicle etc. travels on the steel floor slab are greatly increased. It can be reduced.

The stress concentration generated in the steel floor slab due to the dynamic external force is relaxed, and the load is dispersed by the filled synthetic resin foam, and the fatigue fracture of the constituent members is suppressed.

The above effects are obtained by filling the voids with a lightweight material such as a synthetic resin foam, which does not increase the weight and does not hinder the work.

In the 6-sided completely closed type floor slab, the proof stress of the floor slab itself can be significantly increased by using foamed mortar or foamed concrete for the filling material.

[Brief description of drawings]

1A and 1B show an embodiment in which the present invention is applied to a lining plate, wherein FIG. 1A is a front perspective view and FIG. 1B is a rear perspective view.

2A and 2B show another embodiment in which the present invention is applied to a lining plate, FIG. 2A is a perspective view seen from the front, and FIG. 2B is a perspective view seen from the back.

3A and 3B show still another embodiment in which the present invention is applied to a lining plate, wherein FIG. 3A is a perspective view seen from the front and FIG. 3B is a perspective view seen from the back.

FIG. 4 is a perspective view showing an embodiment when the present invention is applied to a floor plate for soft ground.

FIG. 5 is a perspective view showing an embodiment when the present invention is applied to a floor slab of a vehicle pier.

[Explanation of symbols]

1 ... Steel floor slab, 1a ... Top plate, 1b ... Bottom plate, 1c, 1d
... Side plates, 2 ... Synthetic resin foam, 3 ... Striped channel steel, 4 ...
L-shaped steel, 5 ... CT-shaped steel, 6 ... Horizontal ribs, 7 ... Connecting material, 8
... Slip prevention, 9 ... Rubber pad, 10 ... End stiffener, 1
1 ... Hanging hole, 12 ... Filling hole, 13 ... Air vent hole, 14 ... Foam mortar,

Claims (4)

[Claims] 1. A steel floor slab, characterized in that a synthetic resin foam is filled and installed in a void portion of a steel floor slab having a predetermined thickness mainly formed by assembling steel members. 2. The steel floor slab according to claim 1, wherein the steel floor slab has a top plate and a bottom plate, and a synthetic resin foam is filled between the top plate and the bottom plate. 3. The steel floor slab includes a top plate, a bottom plate, and 4
The steel floor slab of six-faced hermetic type having a side plate of the surface, wherein the hermetically sealed internal space is filled with a synthetic resin foam. 4. The steel floor slab according to claim 3, wherein foamed mortar or foamed concrete is filled in place of the synthetic resin foam.