JP2017067454A - Flooring material analysis method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an analysis method of flooring material for acquiring an index capable of comparing relative walking feeling on different flooring materials.SOLUTION: The analysis method of flooring material analyzes the relative walking feeling by using a displacement amount D of a surface 11 of a test body 1 in a thickness direction at a predetermined position 12 when a load P is applied thereto in the thickness direction; a deflection angle θ which is formed by a surface 13 at a position Ds1 separated away from a predetermined distance from the predetermined position in a plane direction and a plane 14 parallel to the surface before deformation in a state the load is applied.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flooring analysis method.

2. Description of the Related Art Conventionally, floor materials such as floor materials made of wooden boards and soundproof floor materials in which a shock absorbing layer such as a cushion material is laminated on wooden boards are known. When designing or selecting such a flooring, it is desirable to design or select a flooring material that can provide a feeling of walking according to the purpose and taste.
For example, Patent Document 1 below applies a circular uniform distributed load to the floor material surface, measures the displacement at the load center and the displacement at an arbitrary position within an area within 50 mm from the load center, and compares these ratios. A method for evaluating the comfort during use of a flooring material is disclosed.

JP 2013-227846 A

  However, since the method described in Patent Document 1 is based on the ratio of the displacement at the load center to the displacement at an arbitrary position, each displacement ratio of different flooring materials is the same value. The amount of displacement of the flooring may be different, making relative comparison difficult.

  This invention is made | formed in view of the said situation, and it aims at providing the flooring analysis method which obtains the parameter | index which can compare the walk feeling of a different flooring relatively.

  In order to achieve the above object, a flooring analysis method according to the present invention includes a displacement amount in the thickness direction of the predetermined position in a state where a load is applied to the predetermined position on the surface of the test body in the thickness direction, The analysis is performed using a deflection angle formed by a surface at a position spaced a predetermined distance from the predetermined position in the surface area direction in a state where a load is applied and a plane parallel to the surface before the deformation.

  Since the flooring analysis method according to the present invention is configured as described above, it is possible to obtain an index that can relatively compare the feeling of walking of different flooring materials.

An example of the flooring analysis method concerning one embodiment of the present invention is shown typically, (a) is a partial fracture outline top view, (b) and (c) are XX line arrows in (a). It is a partially broken schematic longitudinal cross-sectional view corresponding to vision. (A) is a partially broken schematic enlarged longitudinal sectional view corresponding to FIG. 1 (b), and (b) is a partially broken schematic enlarged longitudinal sectional view corresponding to FIG. 1 (c). It is a graph which shows typically an analysis result using the flooring analysis method. It is a model figure which shows typically an example of the flooring analysis method which concerns on other embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
1-3 is a figure which shows typically an example of the flooring analysis method which concerns on 1st Embodiment, and an example of the analysis result.
As shown in FIGS. 1 and 2, the floor material analysis method according to the present embodiment has a loading position 12 in a state where a load P is applied in the thickness direction to a loading position 12 as a predetermined position on the surface 11 of the test body 1. The displacement amount D in the thickness direction is obtained. Further, the floor material analyzing method includes a surface 13 at a position spaced a predetermined distance from the loading position 12 in a state where the load P is applied and a surface 14 parallel to the surface (reference surface) 11 before deformation. Is obtained. Further, the floor material analysis method is configured to analyze using the displacement amount D and the deflection angle θ. That is, the floor material analysis method includes a step of applying a load P in the thickness direction to the loading position 12 of the surface 11 of the test body 1, a step of obtaining a displacement amount D, a step of obtaining a deflection angle θ, and a displacement amount D. And an analysis process using the deflection angle θ.

The specimen 1 analyzed using the same flooring analysis method may be the flooring itself, or may be larger than the flooring or cut to an appropriate size.
The test body 1 may have various thicknesses, or may be formed from a single material, and has a multilayer structure in which a plurality of types of materials are laminated in the thickness direction. But you can. In the floor material analysis method, it is possible to analyze the test body 1 having various configurations.
For example, a soundproof floor material provided with a shock absorbing layer 15 on the back surface side of the plate material 10 may be used as the test body 1. Moreover, as the board | plate material 10 by the side of the surface layer, what was set as the structure which laminated | stacked the surface decoration material on the surface side of the base material may be sufficient. Moreover, as the board | plate material 10, functional sheets, such as resin impregnated paper and a moisture-proof sheet | seat, may be further laminated | stacked between the surface decoration material and the base material. Moreover, the thing by which the decorative groove was provided in the surface side of the board | plate material 10, and the thing by which the several groove | channel was provided in the back surface side of the board | plate material 10 may be used.

As a base material, the thing formed from the woody material, the synthetic resin type material, the metal-type material, etc. may be used, and the thing made into the multilayer structure which laminated | stacked multiple types may be sufficient. Wood-based materials include wood laminates such as plywood and LVL (single laminate), wood boards such as particle boards, insulation boards, MDF (medium density fiber boards), and wood fiber boards such as hard boards. Can be mentioned. The woody material may be a wood powder / plastic composite (WPC) in which a synthetic resin material contains wood powder, an inorganic filler, a compatibilizer, a colorant and the like in a predetermined content ratio.
Examples of the surface decorative material include a veneer such as a veneer made of natural wood (named wood), a synthetic resin film, and decorative paper.

The shock absorbing layer 15 may be a known cushion material or sound absorbing material, for example, synthetic resin foam such as polyethylene foam or polyurethane foam, natural fiber or non-woven fabric of synthetic resin fiber, soft resin material, rubber material, etc. And may have a multilayer structure in which a plurality of types are laminated.
1B and 1C show an example in which the soundproof floor material provided with the shock absorbing layer 15 is used as the test body 1 on the back surface side of the plate material 10, but the shock absorbing layer 15 is provided. It is good also as what is not the test body 1. Further, the test body 1 is not limited to the so-called wooden flooring as described above, and other floor materials such as a so-called cushion floor, floor tile, carpet, and tatami mat may be used as the test body 1.

In this embodiment, as shown in FIGS. 1B and 1C, a load (static load) is applied to the test body 1 in a state where the test body 1 is mounted on the mounting table 2 having the upper surface 2a made flat. ) P is added.
Further, the load P is a circular uniform distributed load having a predetermined diameter, and the loading position 12 is a position displaced by the outer diameter portion 3a of the circular uniform distributed load (see also FIG. 1A).
As an analysis apparatus for executing the floor material analysis method, a mounting table 2, a columnar body 3 as a loading body for applying a load P to the test body 1 mounted on the mounting table 2, and a displacement amount D It is good also as a thing provided with the measuring device which measures.
The mounting table 2 may have a flat top surface 2a and a horizontal surface facing vertically upward. Also, the mounting table 2 is large when viewed in the thickness direction of the test body 1 so that the test body 1 can be mounted. It is good also as what has the upper surface 2a according to the height.

The cylindrical body 3 has a lower surface 3b parallel to the upper surface 2a of the mounting table 2 (the surface 11 of the test body 1), and has a configuration capable of applying an equal load over the entire surface of the lower surface 3b. It is good also as what was done.
Further, the cylindrical body 3 may have a circular shape with a predetermined diameter when the lower surface 3b is viewed in the vertical direction. The diameter of the cylindrical body 3 may be a diameter corresponding to the ridge 5 as shown in FIG. 2, for example, when obtaining an evaluation index of the test body 1 when stepping on or walking.踵 5 may be assumed to be an average adult male 踵 5. In this case, the diameter of the cylindrical body 3 may be about 50 mm to 90 mm, may be about 60 mm to 80 mm, and may be 70 mm as an example.
Further, the outer peripheral edge at the lower end of the cylindrical body 3 may have an R chamfered shape. Such an R chamfered shape may be similar to the flange 5. Moreover, although the example which made the outer peripheral surface of the columnar body 3 orthogonal to the lower surface (horizontal surface) 3b is shown in the example of the figure, a truncated cone shape that is expanded or tapered toward the upper side. It may be. The cylindrical body 3 may be a relatively thin disk.
The cylindrical body 3 may be one that can be moved up and down with respect to the apparatus main body.

Further, in the present embodiment, a first load P1 and a second load P2 smaller than the first load P1 are applied as the load P applied to the test body 1 using the cylindrical body 3. It is said.
As an aspect of changing the loads P1 and P2, it is possible to change the mass of the columnar body 3 itself or the mass of the weight held by the columnar body 3, and the load to be loaded like an autograph (universal testing machine) can be used. It is good also as an aspect made variable.
In addition, the diameter and shape of the cylindrical body 3 are not limited to those according to the heel 5, but may be those according to the elbows and knees. Further, the loading body 3 is not limited to a cylindrical body that loads a circularly uniform distributed load with a predetermined diameter, and may have an elliptical shape, a rectangular shape, or the like as viewed in the vertical direction according to other body parts such as a shin or a buttocks. It may be made, and various other shapes may also be used.

As a measuring instrument for measuring the displacement amount D, measurement of the displacement amount D in the thickness direction from the surface (reference surface) 11 before deformation of the loading position 12 displaced by the outer diameter portion 3a of the cylindrical body 3 is possible. A possible contact type dial gauge or a non-contact type distance sensor may be used.
In the present embodiment, as will be described later, the first position displacement amount D3 at the first position Ds1 as a position spaced a predetermined distance from the loading position 12 in the surface area direction (the radial direction of the cylindrical body 3), and this first The second position displacement amount D4 at the second position Ds2 between the first position Ds1 and the loading position 12 is obtained. In this case, the measuring device may be movable in the horizontal direction on the upper side of the test body 1. That is, it is good also as a structure which enabled the measurement of the displacement amount D in the loading position 12, the 1st position displacement amount D3, and the 2nd position displacement amount D4 using a single measuring device.

In the present embodiment, the distance L / 2 along the surface area direction from the loading position 12 to the virtual fulcrum 4 where the displacement amount becomes zero is calculated based on the displacement amount D and the deflection angle θ. . Further, the virtual bending stiffness EI is calculated based on the virtual span L and the load P obtained by doubling the distance L / 2. That is, when the load P is applied in the state of being mounted on the mounting table 2 as described above, the substantial fulcrum 4 does not exist, but it is virtually determined from the loading position 12 based on the displacement amount D and the deflection angle θ. The half span L / 2 as a distance along the surface area direction to the fulcrum 4 is calculated. The half span L / 2 may be obtained by dividing the displacement amount D by the tangent (tan θ) of the deflection angle θ. That is, equation (1): L / 2 = D / tan θ may be used.
Further, the half span L / 2 is doubled to obtain a virtual span L, that is, the loading position 12 is assumed to be a concentrated load position, and a half span L / 2 that is equidistant from this position on both sides is assumed. The span L is calculated assuming that there is a pair of fulcrums 4 and 4 at positions separated from each other.

  Further, as shown in FIG. 2 (b), the surface 11 of the test body 1 to which the load P (P2) is applied is a concave curved surface in the vicinity of the loading position 12 in the longitudinal section, and in the vicinity of the first position Ds1. Then, the flat inclined surface portion 13 tends to have a convex curved surface at the outer peripheral side portion. That is, the position where the amount of displacement is substantially zero is a position farther from the loading position 12 than the virtual fulcrum 4 calculated based on the amount of displacement D and the deflection angle θ. The half span L / 2 is calculated on the basis of the displacement amount D and the deflection angle θ so that the influence of the above and the like does not easily occur.

  Moreover, in this embodiment, it is set as the structure which uses the bending angle (theta) in the state which added the 2nd load P2. Further, a distance (distance between two positions) dx along the surface area direction from the first position Ds1 to the second position Ds2, and a first position displacement amount D3 and a second position displacement amount D4 in a state where the second load P2 is applied. And the difference (displacement difference (absolute value)) dw, the deflection angle θ is calculated. The bending angle θ may be obtained from a tangent tan θ obtained by dividing the displacement difference dw by the distance dx between two positions. The half span L / 2 can be regarded as using the tangent tan θ, but the ratio between the displacement difference dw and the distance between two positions dx and the displacement amount D (loading position in a state where the second load P2 is applied) It may be calculated from 12 displacement amounts D2). That is, the floor material analysis method is not limited to the analysis method using the deflection angle θ itself, but also includes the analysis of the ratio between the displacement difference dw and the two-position distance dx and the tangent tan θ.

The first position Ds1 and the second position Ds2 may be positions that are respectively separated from the loading position 12 in a state where the second load P2 is applied, and have substantially the same deflection angle θ. That is, as described above, a concave curved surface is formed in the vicinity of the loading position 12, and a convex curved surface is formed in the vicinity of the virtual fulcrum 4. In the present embodiment, both the first position Ds1 and the second position Ds2 are set to positions where the flat inclined surface portion 13 is obtained with the second load P2 applied. Moreover, when the cylindrical body 3 is made to correspond to the heel 5 as described above and the test body 1 is analyzed at the time of stepping and walking, the first position Ds1 is set from the outer peripheral side portion of the heel 5. It is good also as a position used as the position within the range of a sole.
For example, the first position Ds1 may be a position within 150 mm from the loading position 12, may be a position within 90 mm, or may be a position within 30 mm. Further, the distance dx between the two positions from the first position Ds1 to the second position Ds2 may be 5 mm or more because an error or the like tends to occur if it is too close. Moreover, as an example, the distance along the surface area direction (the radial direction of the cylindrical body 3) from the loading position 12 to the first position Ds1 is 15 mm, and the surface area direction from the loading position 12 to the second position Ds2 is along. The distance may be 5 mm.
Further, the first position displacement amount D3 in the thickness direction from the surface (reference surface) 11 before deformation of the first position Ds1 in the state where the second load P2 is applied, and the surface (reference material) of the second position Ds2 before deformation. The second position displacement amount D4 in the thickness direction from the surface 11 may be measured using the same measuring instrument as described above.

The virtual bending rigidity EI is calculated based on the span L and the second load P2. Although the substantial bending rigidity EI of the test body 1 can be calculated using the longitudinal elastic modulus (Young's modulus) E and the cross-sectional secondary moment I, there are various types such as a laminated structure and a groove formed. Therefore, it is difficult to calculate, and it may be deviated from the actual walking feeling. Therefore, in this embodiment, the virtual bending rigidity EI is used for the analysis.
The virtual bending stiffness EI may be obtained by dividing the product of the second load P2 (load P) and the square of the span L by a value obtained by multiplying the tangent tan θ of the deflection angle θ by 16.
In other words, equation (2): may be used ^{EI = P · L 2/16} · tanθ. At this time, tan θ = dw / dx may be used.
Alternatively, the virtual bending stiffness EI is the displacement amount D2 (displacement amount D) of the loading position 12 with the product of the second load P2 (load P) and the third power of the span L applied with the second load P2. May be obtained by dividing by a value multiplied by 48.
In other words, the formula ^{(2A): EI = P ·} L 3/48 · may be used D.
In other words, the virtual bending stiffness EI may be calculated based on the span L and the second load P2 (load P) and the tangent tan θ of the deflection angle θ or the displacement amount D2 (displacement amount D). .

In the present embodiment, the displacement D1 from the surface (reference surface) 11 before deformation of the loading position 12 in the state where the first load P1 is applied and the deflection angle θ in the state where the second load P2 is applied (this embodiment) In the embodiment, the analysis is performed using the virtual bending stiffness EI calculated based on the deflection angle θ.
The first load P1 may be a load corresponding to a load applied to the test body 1 at the time of depression (maximum load at the time of depression), or may be a load assumed when an average adult male is depressed. In this case, the first load P1 may be, for example, about 50 kgf (about 490.3 N) to 110 kgf (about 1078.3 N), or about 60 kgf (about 588.4 N) to 100 kgf (about 980.7 N). As an example, 80 kgf (about 784.5 N) may be used.
The second load P2 may be assumed to be a displacement (weight shift) of the foot after stepping during walking. In this case, the second load P2 may be, for example, about 10 kgf (about 98.1 N) to about 50 kgf (about 490.3 N), or about 20 kgf (about 196.1 N) to about 40 kgf (about 392.3 N). As an example, 30 kgf (about 294.2 N) may be used.
Moreover, the order and speed which apply these 1st load P1 and 2nd load P2 are good also as an appropriate order and speed.

Further, in the present embodiment, as shown in FIG. 3, a virtual value calculated based on each value in a state in which the first load P <b> 1 is applied in each test body 1 and in a state in which the second load P <b> 2 is applied. The flexural rigidity EI is graphed. In the present embodiment, the vertical axis and the horizontal axis of the graph are the reciprocal (1 / EI) of the displacement amount D1 and the bending rigidity EI. In FIG. 3, the vertical axis is the displacement amount D1, and the horizontal axis is the reciprocal (1 / EI) of the bending stiffness EI. That is, FIG. 3 is a graph in which the displacement amount D1 increases as the distance from the origin of the vertical axis increases, and the bending rigidity EI decreases (softens) as the distance from the origin of the horizontal axis increases.
FIG. 3 shows an example in which the displacement amounts D1 and the reciprocals (1 / EI) of the respective bending stiffnesses EI of different types of test bodies 1A to 1G shown below are plotted on a graph. Further, in FIG. 3, these plural types of test bodies 1A to 1G are stepped on by a plurality of (approximately 20) test subjects, and the range of the feeling of walking on the floor is conveniently determined based on the result of subjective sensory evaluation. This is indicated by a two-dot chain line.

The test body 1A has a cushioning material of 1 mm thickness, a high-density MDF of 1 mm thickness, a decorative sheet on the surface side of a 7 mm thick MDF as a base material provided with a polyurethane foam of 4 mm thickness on the back side. Were stacked in this order.
The test body 1B was configured such that a 2.7 mm thick MDF and a decorative sheet were laminated in this order on the surface of a 9 mm thick plywood as a base material.
The test body 1C was configured such that a decorative sheet was laminated on the surface side of a plywood as a base material provided with a buffer material having a thickness of 9 mm on the back surface side.

The test body 1D had a configuration in which a non-woven fabric having a thickness of 6 mm was provided on the back side of a 9 mm-thick plywood having a protruding plate laminated on the surface.
The test body 1E has a 2 mm-thick sound absorbing material, a 3 mm-thick hollow plate, and a 2 mm-thick cushioning material on the back side of a 9-mm-thick base material obtained by laminating 0.3 mm-thick single plates on the surface. Were stacked in this order.
The test body 1F was configured such that a urethane foam having a thickness of 4 mm was provided on the back side of a 9 mm-thick plywood having a protruding plate laminated on the surface.
The test body 1G was configured such that a hard power sheet and a single plate were laminated in this order on the surface side of a 9 mm thick plywood provided with a 4 mm thick nonwoven fabric on the back surface side.

As shown in FIG. 3, in the test bodies 1B and 1C that do not have a cushion material layer such as a nonwoven fabric or foam, the displacement D1 is small, the bending rigidity EI is large, and the sensory evaluation is as follows. It was evaluation that there was a firm feeling (stability). In addition, the test body 1A had an intermediate displacement amount D1 and a large bending rigidity EI, and the sensory evaluation was an evaluation that it had a feeling of elasticity more than the test bodies 1B and 1C. In addition, the test body 1E had both a medium amount of displacement D1 and a bending rigidity EI, and the sensory evaluation was an evaluation that there was a soft feeling of elasticity than the test body 1A. In addition, the test body 1D had a large displacement amount D1, a medium bending rigidity EI, and was evaluated as having a fluffy feeling (buzzy feeling) in sensory evaluation. Each of the test bodies 1F and 1G had a moderate bending rigidity EI, but the displacement amount D1 was large, and the sensory evaluation was an evaluation that there was a fluffy feeling (buzzing feeling).
From the above results, it was shown that the result of sensory evaluation, the displacement amount D1 and the bending rigidity EI (reciprocal number (1 / EI)) have a correlation.

Since the flooring analysis method according to the present embodiment is configured as described above, it is possible to obtain an index that can relatively compare the walking feeling of different flooring materials.
That is, the displacement amount D in the thickness direction of the loading position 12 in a state where the load P is applied to the predetermined position (loading position) 12 of the surface 11 of the test body 1 in the thickness direction and the predetermined distance from the loading position 12 in the surface area direction. The analysis is performed using the deflection angle θ at positions separated from each other. Therefore, it is possible to obtain a relatively comparable index such as the ease of local dent of the floor material (test body) different from the displacement amount D and the deflection angle θ and the degree of deformation.

  Moreover, in this embodiment, it is set as the structure which applies load P (P1, P2) to this test body 1 in the state which mounted the test body 1 in the mounting base 2 by which the upper surface 2a was made into the flat surface. Therefore, for example, it can be stably deformed as compared with the case where the load P is applied in a state of being supported by a pair of supporting points that are provided apart from each other, and in a state in which the load is applied. The deformation in a close state can be analyzed.

In the present embodiment, the distance L / 2 along the surface area direction from the loading position 12 to the virtual fulcrum 4 where the displacement amount becomes zero is calculated based on the displacement amount D and the deflection angle θ. . Further, the virtual bending stiffness EI is calculated based on the virtual span L and the load P obtained by doubling the distance L / 2, and the bending stiffness EI and the displacement amount D are used for analysis. . Therefore, the characteristics of the specimen 1 can be grasped more effectively compared to the method of analyzing using the displacement amount D and the deflection angle θ. Thereby, for example, if the bending rigidity EI is large and the displacement amount D is small, the flooring is stable (low shock absorption), and if the bending rigidity EI is small and the displacement amount D is large, It can be comparatively evaluated that the floor material is soft and unstable. It can also be graphed as described above. As described above, if one of the horizontal axis and the vertical axis of the graph is the reciprocal (1 / EI) of the bending rigidity EI of each test body 1, the hard test body 1 (1A, 1B) is also a graph. It is possible to create a graph that is easy to convert and easy to see sensuously.
In addition, the virtual bending stiffness EI can be obtained by calculating the virtual span L while the load P is applied in a state of being mounted on the mounting table 2. Further, for example, the span L is compared with a method of calculating the virtual span L by specifying the deformation start portion where the displacement amount of the surface 11 of the test body 1 is zero as the virtual fulcrum 4 by detection or the like. Can be easily obtained.
In addition, by obtaining a virtual bending rigidity EI, when designing a device that can provide a walking sensation according to the application and preferences, it is easily reflected as an index for selecting the material to be laminated and setting the thickness.

In the present embodiment, the load P is a circular uniform load having a predetermined diameter, and the loading position 12 is a position displaced by the outer diameter portion 3a of the circular uniform load. Therefore, the displacement amount D (D1) can be easily measured by assuming that the displacement amount at the load center position and the displacement amount at the position (loading position) 12 displaced by the outer diameter portion 3a are the same. . Further, the displacement amount D (D1) or the like can be measured by setting the diameter of the circularly distributed load as the diameter according to the body part, for example, the diameter according to the heel 5 as described above. Further, the load can be varied according to the body part, and a finer analysis can be performed.
Further, the loading position 12 can be used as a reference for the first position Ds1 and the second position Ds2.

In the present embodiment, the difference between the distance (distance between two positions) dx from the first position Ds1 to the second position Ds2 (the distance between two positions) dx and the first position displacement amount D3 and the second position displacement amount D4 ( The deflection angle θ is calculated based on the displacement difference dw. Therefore, the accuracy of the deflection angle θ in each specimen 1 can be improved as compared with a method in which the deflection angle θ is measured by bringing an angle meter or the like into contact with the deformed surface.
Further, as described above, if the first position Ds1 is set to a position within 30 mm from the loading position 12, it is possible to make it difficult to be affected by the portion having the convex curved surface shape as described above.
Further, as described above, if the first position Ds1 is a position 15 mm away from the loading position 12 and the second position Ds2 is a position 5 mm away from the loading position 12, the gradient becomes a relatively constant portion. Therefore, it is possible to make it more difficult to receive the influence of the portion where the speed is likely to occur.

In the present embodiment, as the load P applied to the loading position 12, a first load P1 and a second load P2 smaller than the first load P1 are added, and the displacement amount D1 in the state where the first load P1 is applied. In addition, the analysis is performed using the deflection angle θ in a state where the second load P2 is applied. Accordingly, the displacement D1 at that time is measured as the load when the first load P1 is depressed, and the bending angle θ at that time is obtained as the load at the time of movement after the second load P2 is depressed. An index approximated to the feeling can be obtained.
In the present embodiment, the analysis is performed using the displacement amount D1 when the first load P1 is applied and the virtual bending stiffness EI calculated based on each value when the second load P2 is applied. It is configured. Therefore, it is possible to more effectively grasp the characteristics of the test body 1 that approximates the actual walking feeling.

Next, another embodiment according to the present invention will be described with reference to the drawings.
FIG. 4 is a diagram schematically illustrating an example of a flooring analysis method according to the second embodiment.
Note that differences from the first embodiment will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or briefly described.

In the floor material analysis method according to the present embodiment, the load P applied to the loading position 12A of the test body 1 is a single load P. That is, the load for obtaining the displacement amount D and the load for obtaining the deflection angle θ are the same load. The load P may be the same load as the first load P1 or the second load P2 described above, or may be an intermediate load between the first load P1 and the second load P2.
In addition, the deflection angle θ is measured using an angle meter. The bend angle θ may be measured by using an angle meter at the above-described inclined surface portion 13, that is, the portion between the first position Ds1 and the second position Ds2 and the vicinity thereof. Further, the half span L / 2 is calculated in the same manner as described above based on the deflection angle θ and the displacement amount D. The virtual bending stiffness EI may be calculated in the same manner as described above on the basis of the span L, the load P, etc., which is twice the half span L / 2.
Also in the flooring analysis method according to the present embodiment, the same analysis as in the first embodiment is possible, and the same effect is obtained.

In addition, you may make it apply the structure which is mutually different demonstrated in each said embodiment rearranged or combined.
In each of the above embodiments, an example is shown in which a virtual bending stiffness EI is calculated and analyzed using the bending stiffness EI and the displacement amount D (D1). Not limited. For example, the specimen 1 may be analyzed using the displacement amount D and the deflection angle θ without using the bending rigidity EI.
Moreover, in each said embodiment, although the test body 1 was mounted on the mounting base 2 by which the upper surface 2a was made into the flat surface, the example which set it as the structure which applies the load P to the test body 1 is shown, It is not restricted to such an aspect. For example, the load P may be applied to the central portion between the pair of support portions in a state where the test body 1 is supported by a pair of support portions provided at a predetermined distance in the horizontal direction. The flooring analysis method according to each of the above embodiments can be variously modified.

1, 1A to 1G Specimen 2 Mounting table 2a Upper surface 3a Outer diameter part 4 Support point 11 Surface 12, 12A Loading position (predetermined position, position displaced by outer diameter part)
13 Inclined surface portion (surface at a predetermined distance from the predetermined position in the surface area direction)
14 plane parallel to the surface before deformation D, D1 displacement amount D3 first position displacement amount D4 second position displacement amount Ds1 first position Ds2 second position dw displacement difference (first position displacement amount and second position in the first position) Difference from the second position displacement amount at the position)
dx Distance between two positions (distance along the surface area direction from the first position to the second position between the first position and the predetermined position)
EI Bending rigidity L span L / 2 half span (distance along the surface area from the loading position to a virtual fulcrum where the displacement is zero)
P load P1 1st load (load)
P2 Second load (load)
θ Deflection angle

Claims (6)

  The amount of displacement in the thickness direction of the predetermined position when a load is applied in the thickness direction to a predetermined position on the surface of the test body, and a predetermined distance in the surface area direction from the predetermined position in the state where the load is applied A flooring analysis method, comprising: analyzing using a deflection angle formed by a surface at a certain position and a plane parallel to the surface before deformation. In claim 1,
A flooring analysis method, wherein the load is applied to the test body in a state where the test body is mounted on a mounting table having a flat upper surface. In claim 2,
A distance along the surface area direction from the predetermined position to a virtual fulcrum where the displacement amount becomes zero is calculated based on the displacement amount and the deflection angle, and a virtual span and the load obtained by doubling the distance are calculated. A floor material analysis method characterized in that a virtual bending stiffness is calculated based on the above and the bending stiffness and the amount of displacement are analyzed. In any one of Claims 1 thru | or 3,
A flooring analysis method, wherein the load is a circular uniform distributed load having a predetermined diameter, and the predetermined position is a position displaced by an outer diameter portion of the circular uniform distributed load. In any one of Claims 1 thru | or 4,
Distance along the surface area direction from a first position as a position spaced a predetermined distance in the surface area direction from the predetermined position in the state where the load is applied to a second position between the first position and the predetermined position And calculating the deflection angle based on the difference between the first position displacement amount at the first position and the second position displacement amount at the second position. In any one of Claims 1 thru | or 5,
As a load applied to the predetermined position, a first load and a second load smaller than the first load are applied, and the displacement amount in a state where the first load is applied and the deflection in a state where the second load is applied. A flooring analysis method, characterized by performing analysis using corners.

Images