KR101613641B1 - Apparatus and method for calculating wind load considering topographic factor - Google Patents

Abstract

The present invention relates to an apparatus and a method for calculating a wind load in consideration of a terrain factor. According to the embodiment of the present invention, the wind load can be calculated by quantitatively and reasonably reflecting the influence of the terrain on the wind.

Description

[0001] APPARATUS AND METHOD FOR CALCULATING WIND LOAD CONSIDERING TOPOGRAPHIC FACTOR [0002]

The present invention relates to an apparatus and a method for calculating a wind load in consideration of a terrain factor.

The influence of wind in the design of structures is one of the items to be considered. Wind characteristics such as wind velocity or wind direction can be affected by the surrounding topography and may threaten the safety of the structure if the wind speed is accelerated by the surrounding terrain. Therefore, it is required to reflect the change of the wind speed according to the surrounding terrain into the design of the structure.

In order to consider the change of the wind velocity by the terrain, the terrain factor is introduced when calculating the design wind speed. The terrain factor is set to 1.0 for areas that do not affect the wind, such as flat land, but greater than 1.0 for areas that change wind speed, such as mountains, hills, or slopes.

The terrain factor is calculated on the basis of the specified windward and downwind slopes according to the wind direction of the surrounding terrain. However, in the past, the surrounding terrain as a reference for calculating the terrain factor has been subjectively and arbitrarily determined by the designer. As a result, the terrain coefficient calculated by the conventional method does not sufficiently reflect the influence of the terrain on the wind, so that the wind load may be calculated to be too large or small.

It is an object of the present invention to provide a wind load calculation apparatus and method that can quantitatively and reasonably reflect the influence of a terrain on the wind.

A wind load calculation apparatus according to an embodiment of the present invention includes a target area setting unit for setting a first target area and a second target area around a structure; An information obtaining unit obtaining position information and height information of a plurality of points in the first and second target regions; Subtracting a horizontal distance between each point in the first target area and the structure to a predetermined initial value using the position information and adding a horizontal distance between each point in the second target area and the structure to the initial value, Calculating a reference value for each point; Selecting at least three consecutive points among the plurality of points in order of the reference value; A vertex candidate determining unit that determines a vertex candidate as a vertex candidate when the reference value of the highest point among the three or more selected points corresponds to an intermediate point among the reference values of the selected three or more points; And setting a point at which a horizontal distance between the structures is the shortest among the vertex candidates obtained from the plurality of points as a vertex, setting the lowest point among the plurality of points as an earth surface, calculating a height of the surface from the height of the vertex And a vertex height calculating unit for calculating a vertex height for calculating a wind load applied to the structure by subtracting the vertex height.

The first target region and the second target region may be symmetrical about the structure.

The first target region and the second target region may be two fan-shaped regions having a predefined angle of throttle.

The thigh angle may be greater than or equal to zero and less than or equal to 180 degrees.

Wherein the information obtaining unit comprises: an electronic map for a plurality of points in the first and second target areas; And metrology data obtained by surveying a plurality of points in the first and second target areas; The position information and the height information can be obtained from at least one of the position information and the height information.

Wherein the information obtaining unit comprises: an electronic map for the first and second target areas; And metering data for the first and second target regions; The position information and the height information of the plurality of points can be obtained by using the interpolation method based on at least one of the position information and the height information.

Wherein the information obtaining unit obtains a digital elevation model for the first and second target areas by using at least one of an electronic map for the first and second target areas and measurement data for the first and second target areas, And obtain position information and height information of the plurality of points from the digital elevation model.

The wind load calculation apparatus may further include a terrain coefficient calculation unit for calculating a terrain coefficient based on the peak height.

A wind load calculation method according to an embodiment of the present invention includes: setting a first target area and a second target area around a structure; Obtaining position information and height information for a plurality of points in the first and second target regions; Subtracting a horizontal distance between each point in the first target area and the structure to a predetermined initial value using the position information and adding a horizontal distance between each point in the second target area and the structure to the initial value, Calculating a reference value for each point; Selecting at least three consecutive points in the order of the reference value among the plurality of points; Determining a corresponding point as a vertex candidate when the reference value of the highest point among the selected three or more points corresponds to an intermediate point among the reference values of the selected three or more points; Setting a point at which a horizontal distance between the structures among the vertex candidates obtained from the plurality of points is the shortest as a vertex; Setting the lowest point among the plurality of points as an earth surface; And calculating a vertex height for calculating a wind load applied to the structure by subtracting the height of the ground surface from the height of the vertex.

The setting of the first target area and the second target area may comprise: setting the first target area and the second target area symmetrical about the structure.

Wherein the step of setting the first target region and the second target region comprises: setting two sectoral regions having a predefined angle of throttle about the structure as the first target region and the second target region, respectively .

The thigh angle may be greater than or equal to zero and less than or equal to 180 degrees.

Wherein the obtaining of the position information and the height information comprises: an electronic map for a plurality of points in the first and second target regions; And metrology data obtained by surveying a plurality of points in the first and second target areas; And obtaining the position information and the height information from at least one of the position information and the height information.

Wherein the obtaining of the position information and the height information comprises: interpolating based on at least one of an electronic map for the first and second target regions and survey data for the first and second target regions, And acquiring positional information and height information of a point of the point.

Wherein the obtaining of the position information and the height information comprises: using the at least one of the electronic map for the first and second target regions and the measurement data for the first and second target regions, Generating a numerical elevation model for the target area; And obtaining location information and height information of the plurality of points from the digital elevation model.

The wind load calculation method may further include calculating a terrain factor based on the peak height.

The wind load calculation method according to the embodiment of the present invention can be implemented by a computer-executable program and recorded on a computer-readable recording medium.

According to the embodiment of the present invention, the wind load can be calculated by quantitatively and reasonably reflecting the influence of the terrain on the wind.

1 is a block diagram showing a wind load calculation apparatus according to an embodiment of the present invention.
2 is a view showing an example of first and second target regions set for calculating wind loads according to an embodiment of the present invention.
3 is a view showing another example of first and second target regions set to calculate a wind load according to an embodiment of the present invention.
4 is a view showing another example of the first and second target regions set to calculate the wind load according to an embodiment of the present invention.
5 is a view illustrating an exemplary reference value and a height of a plurality of points according to an embodiment of the present invention.
Fig. 6 is a side view and a downwind section of the terrain of the terrain exemplarily illustrated to illustrate the parameter calculation process according to one embodiment of the present invention.
FIG. 7 is a view for explaining a process of calculating the horizontal distance on the windward side of the terrain by using interpolation according to an embodiment of the present invention.
FIG. 8 is a view for explaining a process of calculating a vertical distance on the windward side of a terrain by using interpolation according to an embodiment of the present invention.
9 is a flowchart illustrating a method for calculating a wind load according to an embodiment of the present invention.

Other advantages and features of the present invention and methods for accomplishing the same will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Unless defined otherwise, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by the generic art in the prior art to which this invention belongs. Terms defined by generic dictionaries may be interpreted to have the same meaning as in the related art and / or in the text of this application, and may be conceptualized or overly formalized, even if not expressly defined herein I will not.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, the terms' comprise 'and / or various forms of use of the verb include, for example,' including, '' including, '' including, '' including, Steps, operations, and / or elements do not preclude the presence or addition of one or more other compositions, components, components, steps, operations, and / or components. The term 'and / or' as used herein refers to each of the listed configurations or various combinations thereof.

It should be noted that the terms such as '~', '~ period', '~ block', 'module', etc. used in the entire specification may mean a unit for processing at least one function or operation. For example, a hardware component, such as a software, FPGA, or ASIC. However, '~ part', '~ period', '~ block', '~ module' are not meant to be limited to software or hardware. Modules may be configured to be addressable storage media and may be configured to play one or more processors. ≪ RTI ID = 0.0 >

Thus, by way of example, the terms 'to', 'to', 'to block', 'to module' refer to components such as software components, object oriented software components, class components and task components Microcode, circuitry, data, databases, data structures, tables, arrays, and the like, as well as components, Variables. The functions provided in the components and in the sections ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ' , '~', '~', '~', '~', And '~' modules with additional components.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto.

As used herein, the term "structure" is intended to encompass a building, a workpiece, a building, a window, an outdoor advertisement, a bridge, etc. and means all objects placed in space and subjected to wind loads.

When designing the structure, the design wind speed is calculated to calculate the design load by wind. On the other hand, the design wind speed proposed in KBC 2009 can be calculated by the following equation:

As a parameter used to calculate the above equation design velocity, V ₀ is the local base velocity, K _zr is wind speed and high distribution coefficient, K _zt is the importance of the terrain coefficient, I _w is a structure for consideration of the effect of the terrain Coefficient.

Considering the ground surface roughness at the point where the structure is located and the corresponding height of the atmospheric boundary layer starting point (Z _b ), the reference height of the stony wind (Z _g ) and the wind speed altitude distribution index (α), the wind speed altitude distribution coefficient (K _zr ) Lt; / RTI >

In addition, the atmospheric boundary layer starting height (Z _b ), the reference hard wind height (Z _g ) and the wind speed altitude distribution index (α) are determined as shown in Table 2 according to the surface roughness.

The surface roughness proposed in KBC 2009 is classified as shown in Table 3 according to the surface condition of the surrounding area at the location of the structure.

The geomorphic coefficient (K _zt ) is a factor that takes account of the wind speed addition by the topography, and is set to 1.0 in areas that do not affect the wind like flat land. However, in areas where a wind velocity premium is required, such as mountains, hills, and slopes, the terrain factor can be calculated by the following equation:

The basic wind speed (V ₀ ) is the local wind velocity applied to the design wind speed as a default, and is the wind speed corresponding to the 100-year repetition period of the average wind speed for 10 minutes at the ground surface height of 10 m at the ground surface roughness C. The basic wind speed is calculated as follows according to the area where the structure is located. However, if the structure is located between the equi-velocity lines, the values between the equi-velocity lines can be interpolated.

The importance coefficient (I _w ) is a coefficient indicating the safety factor according to the years of use of the structure, and is calculated as follows considering the importance of the structure:

1 is a block diagram showing a wind load calculation apparatus according to an embodiment of the present invention.

1, the wind load calculation apparatus 100 may include a target area setting unit 111, an information obtaining unit 112, a vertex candidate determining unit 113, and a vertex height calculating unit 114 have.

The target region setting unit 111 may set a first target region and a second target region around the structure.

The information obtaining unit 112 may obtain position information and height information for a plurality of points in the first and second target regions.

The vertex candidate determining unit 113 subtracts the horizontal distance between each point in the first target area and the structure to a predetermined initial value using the position information, A reference value for each point can be calculated by adding the horizontal distance between the point and the structure.

The vertex candidate determining unit 113 selects three or more consecutive points in the order of the reference value among the plurality of points and selects the highest point among the three or more selected points among the reference points of the selected three or more points , It is possible to determine the corresponding point as a vertex candidate.

If the number N of the selected points is an odd number, the intermediate reference value means an (N + 1) / 2th reference value. If the number of selected points N is an even number, Means a second reference value and (N / 2) + 1-th reference value.

The vertex height calculation unit 114 may set a point at which the horizontal distance between the structures among the vertex candidates obtained from the plurality of points is the shortest point and a lowest point among the plurality of points as the ground surface.

The vertex height calculating unit 114 may calculate a vertex height for calculating a wind load applied to the structure by subtracting the height of the ground surface from the height of the vertex.

2 is a view showing an example of first and second target regions set for calculating wind loads according to an embodiment of the present invention.

According to an embodiment of the present invention, the target region setting unit 111 may set the target region such that the first target region 211 and the second target region 212 are symmetric with respect to the structure 31. The first and second target regions 211 and 212 may have a predetermined shape and size.

For example, as shown in FIG. 2, the target area setting unit 111 sets a straight line passing through the structure 31 as a target area, and a line located on one side of the structure 31 is a first target And the straight line positioned on the other side may be set as the second target area 212. [

Here, the length of each of the first and second target regions 211 and 212 may be a small value between 40 times and 3 km of the height of the structure 31, but the length of the target region is not limited thereto Do not.

3 is a view showing another example of first and second target regions 211 and 212 set to calculate a wind load according to an embodiment of the present invention.

As shown in FIG. 3, the target region setting unit 111 may set two regions facing the structure 31 as first and second target regions 211 and 212.

According to one embodiment, the first and second target regions 211 and 212 may have a sector shape having a predetermined radius and a thigh angle.

Here, the radius of the first and second target regions 211 and 212 may be a small value between 40 and 3 km of the height of the structure 31. However, the present invention is not limited thereto, °.

Although the first and second target regions 211 and 212 are shown in a fan shape in FIG. 3, as long as the first and second target regions 211 and 212 are symmetrical about the structure 31, The shape is not limited.

4 is a view showing another example of the first and second target regions 211 and 212 set to calculate the wind load according to an embodiment of the present invention.

As shown in FIG. 4, the target region setting unit 111 sets a region having a predetermined shape and size around the structure 31 as a target region, and the target region is divided into half, The target area 211 may be set as the second target area 212, and the other half may be set as the second target area 212. [

In FIG. 4, the target region is set to be circular, but the shape of the target region is not limited thereto, and may be set to any shape, for example, a polygon, an ellipse, or the like.

If the target area is set to a circular shape, the radius of the target area may be a small value of 40 times or 3 km of the height of the structure 31, but is not limited thereto.

The information obtaining unit 112 may obtain positional information and height information for a plurality of points X in the first and second target areas 211 and 212. [

According to one embodiment, the information obtaining unit 112 obtains the position of the point X from at least one of the digital map for the plurality of points X and the survey data obtained by measuring the plurality of points X, Location information and height information can be obtained. The measurement data may be data obtained using at least one of a ground survey, a GPS survey, an aerial photogrammetry, a radar survey and a LiDAR survey, but the survey method for obtaining the survey data is not limited thereto .

According to one embodiment, the wind load calculation apparatus 100 may further include a storage unit 12. The storage unit 12 may store position information and height information for the plurality of points X. In this case, the information obtaining unit 112 may obtain the position information and the height information of the plurality of points X by calling the information stored in the storage unit 12. [

According to another embodiment of the present invention, the wind load calculation apparatus 100 may further include a communication unit 10. The communication unit 10 may be connected to a server providing geographical information on the plurality of points X.

For example, as shown in FIG. 1, the communication unit 10 may be connected to a server 200, for example, a geographic information system (GIS) that provides geographic information through a wired or wireless network, 112 may obtain height information for the plurality of points X from the server 200.

The wind load calculation apparatus 100 may further include an input unit 13 and the position information and the height information of the plurality of points X may be input from the user through the input unit 13 have.

As described above, the information obtaining unit 112 may obtain the height information of the plurality of points X from at least one of the electronic map and the survey data, but according to the embodiment, at least one of the electronic map and the survey data The height information of the plurality of points X may be obtained using an interpolation method.

For example, the information obtaining unit 112 may obtain an electronic map for the first and second target areas 211 and 212, and the measurement data obtained by measuring the first and second target areas 211 and 212 The position information and the height information of the plurality of points X can be obtained by using the interpolation method based on at least one of the position information and the height information.

The information obtaining unit 112 may obtain positional information and height information of the plurality of points X from the digital elevation model (DEM) of the first and second target regions 211 and 212 have.

For example, the information obtaining unit 112 may first obtain positional information and height information of a plurality of sample points in the first and second target regions 211 and 212, and then, based on the obtained information, 1 and the second target regions 211 and 212. [0100] FIG. Then, the information obtaining unit 112 may obtain position information and height information of the plurality of points X from the digital elevation model.

According to one embodiment, the plurality of points X may be located at equal intervals in the first and second target regions 211 and 212, but the plurality of points X may be spaced at different intervals . In other words, the plurality of points X may be uniformly or non-uniformly distributed within the first and second target regions 211 and 212. [

The vertex candidate determining unit 113 uses the position information of the plurality of points X to subtract a horizontal distance between each point in the first target area 211 and the structure 31 to a predetermined initial value And a horizontal distance between each point in the second target area 212 and the structure 31 is added to the initial value to calculate a reference value for each point. Here, the initial value may be set to a positive value or a negative value, but is not limited thereto and may be set to zero.

In other words, the reference value of the point in the first target area 211 is a value obtained by subtracting the horizontal distance of the point from the initial value, and the reference value of the point in the second target area 212 is a value May be a value obtained by adding the horizontal distance of the light source.

For example, if the initial value is set to 0, and the distance between a point in the first target area 211 and the structure 31 is 300 m on the map, the vertex candidate determining unit 113 determines It is possible to calculate -300 m as a reference value.

As another example, when the initial value is set to 0, and the distance between a point in the second target area 212 and the structure 31 is 300 m on the map, the vertex candidate determining unit 113 determines +300 m can be calculated as the reference value.

The vertex candidate determining unit 113 may select at least three consecutive points among the plurality of points X in the first and second target regions 211 and 212 in the order of the reference values. The vertex candidate determining unit 113 may determine a vertex candidate as a vertex candidate when the reference value of the highest point among the three or more selected vertices corresponds to an intermediate among the reference values of the selected three or more vertices.

FIG. 5 is an exemplary view showing reference values and heights of a plurality of points X according to an embodiment of the present invention.

The vertex candidate determining unit 113 may sort the plurality of points X based on a reference value to determine a vertex candidate from a plurality of points X. [ 5 shows fifty points located in the first target area 211 and fifty points located in the second target area 212 arranged in ascending order of the reference value.

The vertex candidate determining unit 113 may select at least three consecutive points among the plurality of points X in order of reference value.

For example, referring to FIG. 5, the vertex candidate determining unit 113 determines three vertices that are consecutive in the order of the reference value out of the 100 points (for example, the points of the order 1 to 3, the points of the order 2 to 4 , Points of order number 3 to 5, ..., numbers of order number 98 to 100).

Then, the vertex candidate determining unit 113 may determine the vertex candidate as a vertex candidate when the reference value of the highest point among the three or more selected vertices corresponds to an intermediate among the reference values of the selected three or more vertices.

For example, when the number of the selected points is set, if the reference value of the highest point among the selected points corresponds to the second reference point of the selected points, the point may be determined as a vertex candidate.

As another example, when the number of the selected points is six, if the reference value of the highest point among the selected points corresponds to the third or fourth reference point of the selected points, the point may be determined as a vertex candidate.

For example, referring to FIG. 5, the highest point among the points 1 to 3 of sequence numbers is the point of sequence number 3. However, since the reference value of the sequence number 3 corresponds to the end of the sequence numbers 1 to 3, the sequence number 3 is not determined as a vertex candidate.

Likewise, the vertex candidates are not determined from the positions of the order numbers 2 to 4, the positions of the order numbers 3 to 5, and the positions of the order numbers 4 to 6, since the highest point is the last in the horizontal distance order.

On the other hand, the point of sequence number 6, which is the highest point among the sequence numbers 5 to 7, corresponds to the midpoint among the points of the sequence numbers 5 to 7 in order of the reference value, and thus the point of sequence number 6 is determined as the vertex candidate.

Likewise, the point 98 of the order number 97, which is the highest point among the order numbers 97 to 99, corresponds to the midpoint among the points 97 to 99 in the order of the reference value, so that the point 98 is also determined as the vertex candidate.

In this manner, the vertex candidate determining unit 113 can determine one or more vertex candidates from the plurality of points X through an iterative calculation.

The vertex height calculating unit 114 may set a point at which the horizontal distance between the structures among the vertex candidates obtained from the plurality of points X is the shortest. The lowest point among the plurality of points X may be set as the ground surface.

The vertex height calculating unit 114 may then calculate the vertex height H used to calculate the wind load applied to the structure 31 by subtracting the height of the ground surface from the height of the vertex .

According to an embodiment of the present invention, the vertex height calculating unit 114 may further calculate other parameters for calculating the wind load using the estimated vertex height H (H).

For example, the vertex height calculating section 114 calculates at least one of the windward side horizontal distance L _u , the windward vertical distance H _d and the structure vertex horizontal distance X as parameters for calculating the wind load Can be calculated.

Fig. 6 is a side view and a downwind section of the terrain of the terrain exemplarily illustrated to illustrate the parameter calculation process according to one embodiment of the present invention.

According to an embodiment of the present invention, the vertex height calculating unit 114 may calculate a difference between a height of the vertex and a height of each of the points located on the windward side slope. For example, referring to Figure 6, the vertex height calculation unit 114 difference in height between each apex (point 9), and the upwind side of the inclined surface the points located on the (point 1 to point 8) (h ₉ - h _{1 , h 9 - h 2, h} 9 - h 3, h 9 - h 4, h 9 - h 5, h 9 - h 6, h 9 - h 7, h 9 - can be calculated h _8).

Then, the vertex height calculating unit 114 can determine a point nearest to a half of the difference in the calculated height difference from the height of the vertex to the height of the ground surface (i.e., the vertex height H). Referring to FIG. 6, the point at which the height difference from the vertex (point 9) closest to half (H / 2) of the vertex height corresponds to point 6.

Then, the vertex height calculating unit 114 may calculate the horizontal distance L _u by calculating the horizontal distance between the determined point and the vertex. For example, referring to FIG. 6, the vertex height calculating unit 114 may calculate a horizontal distance L _u by calculating a horizontal distance between a point 6 and a vertex 9.

According to an exemplary embodiment, when the points are spaced apart by the same distance, it is possible to calculate the windward side horizontal distance L _u by calculating a multiple of the interval. For example, in FIG. 2, when the interval between points is set to 10 m, the vertex height calculating unit 114 can calculate 10 × (9 - 6) = 30 m as the windward side horizontal distance L _u have.

According to another embodiment of the present invention, the vertex height calculating unit 114 may use interpolation to determine a point at which the height difference corresponds to H / 2.

According to this embodiment, the vertex height calculating unit 114 can calculate the height difference between the vertex height and each of the points located on the windward side slope. Then, the vertex height calculating section 114 can determine a first point closest to a half (H / 2) of the difference between the height of the apex and the height of the earth surface and a second point closest to the second point. For example, referring to FIG. 6, the first point closest to the H / 2 height difference is point 6, and the second closest point corresponds to point 7.

Then, using the interpolation from the first point and the second point, the vertex height calculating section 114 calculates the height difference from the vertex by half (H / 2) of the difference between the height of the vertex and the height of the earth surface The corresponding point can be calculated.

FIG. 7 is a view for explaining a process of calculating the horizontal distance on the windward side of the terrain by using interpolation according to an embodiment of the present invention.

As shown in Fig. 7, the vertex height calculating section 114 calculates the height difference from the vertex (point 9) by using interpolation from the first point (point 6) and the second point (point 7) to H / 2 The corresponding point 65 can be calculated. For example, if the height of the first point (point 6) is 22 m, the height of the second point (point 7) is 29 m, the height of the vertex (point 9) is 40 m, and a height of 10 m, a first point (point 6) and when the second point horizontal distance between (point 7) of 10 m, a vertex (point 9), and the height difference between _{h / 2 = (h 9 -} h 2) The height of the point 65 corresponding to / 2 = 15 m is 25 m. In one embodiment, when linear interpolation is performed using a linear function, the horizontal distance between point 65 and point 7 is 10 X (h ₇ - h ₆₅ ) / (h ₇ - h ₆ ) 25) / (29 - 22)? 5.7 m.

The vertex height calculating unit 114 may calculate the horizontal distance L _u by calculating the horizontal distance between the point 65 and the vertex (point 9). For example, since the horizontal distance between the point 65 and the point 7 is 5.7 m and the horizontal distance between the points 7 and 9 is 10 X (9 - 7) = 20 m, the vertex height calculating section 114 25.7 m can be calculated as the horizontal distance L _u on the windward side of the terrain.

As described above, the vertex height calculating section 114 can calculate the horizontal distance L _u of the terrain by using at least one of the position information and the height information of a plurality of points.

According to one embodiment of the invention, the vertex height calculation unit 114 may calculate the downwind side of the vertical distance (H _d) of the terrain using at least one of the location information and the height information.

According to one embodiment, the vertex height calculating unit 114 may calculate a straight line distance between vertexes and each of the points located on the downwind side slope. For example, referring to FIG. 6, the vertex height calculating section 114 may calculate a straight line distance L between vertexes (point 9) and points (points 10 to 21) located on the downhill slope, respectively .

Then, the vertex height calculating section 114 can determine the point at which the straight line distance is closest to five times (5H) of the difference between the height of the vertex and the height of the ground surface. Referring to FIG. 6, the point nearest to the vertex 5H (5H) of the vertex point (point 9) corresponds to point 21.

Then, the vertex height calculating unit 114 may calculate a difference between the height of the determined point and the height of the vertex to calculate the downwind vertical distance H _d . Referring to FIG. 6, the vertex height calculating unit 114 may calculate a vertical distance H _{d by} subtracting a height difference between a point 21 and a vertex (point 9). For example, when the height of the point 21 is 11 m, the vertex height calculating section 114 can calculate h ₉ - h ₂₁ = 40 - 11 = 29 m as the downward vertical distance (H _d ).

According to another embodiment of the present invention, the vertex height calculating unit 114 may determine a point corresponding to a straight line distance of 5H using interpolation.

According to this embodiment, the vertex height calculating section 114 can calculate the straight line distance L between the vertices and each of the points located on the downward sloping surface. Then, the straight line distance can determine the first point closest to the fifth point (5H) of the difference between the height of the vertex and the height of the earth surface and the second point closest to the second point. For example, referring to FIG. 6, the first point closest to the straight line distance 5H is point 21, and the second closest point corresponds to point 20.

Then, using the interpolation from the first point and the second point, the straight line distance L from the vertex is five times (5H) the difference between the height of the vertex and the height of the ground surface, Can be calculated.

FIG. 8 is a view for explaining a process of calculating a vertical distance on the windward side of a terrain by using interpolation according to an embodiment of the present invention.

As shown in Fig. 8, the vertex height calculating section 114 calculates the straight line distance from the vertex (point 9) to the vertex 5H using the interpolation from the first point (point 21) and the second point A point 205 at which a point of intersection can be calculated. For example, if the height of the first point (point 21) is 11 m, the height of the second point (point 20) is 13 m, the height of the vertex (point 9) is 40 m, The horizontal distance between the first point (point 21) and the second point (point 20) is 10 m and the linear distance L ₂₁ between the vertex (point 9) and the first point (point 21) is 152 m , And the straight line distance L ₂₀ between the vertex (point 9) and the second point (point 20) is 146 m, the vertex height calculating section 114 calculates the height difference h between the point 20 and the point 205 as follows You can get:

_{h = (L 205 - L 20} ) / (L 21 - L 20) × (h 20 - h 21) = (150 - 146) / (152 - 146) × (13 - 11) ≒ 1.3 m

Then, the vertex height calculating unit 114 may calculate the vertical distance H _d by calculating the vertical distance between the point 205 and the vertex (point 9). For example, as described above, since the vertical distance between the point 20 and the point 205 is 1.3 m and the vertical distance between the point 9 and the point 20 is h ₉ - h ₂₀ = 40 - 13 = 27 m, (H _d ) of the topography of the terrain.

According to an embodiment of the present invention, the vertex height calculation unit 114 may calculate the horizontal distance X of the structure peak by calculating the horizontal distance between the vertex and the nearest point to the structure. For example, if the point closest to the structure in FIG. 6 is the point 18, the vertex height calculation unit 114 can calculate 10 × (18 - 9) = 90 m as the vertex horizontal distance X of the structure . According to an embodiment, if the structure is located between two points, the vertex elevation angle determination unit 114 may use the interpolation from the two points to estimate the structure vertex horizontal distance X.

Referring again to FIG. 1, the wind load calculation apparatus 100 may further include a terrain factor calculation unit 115. [0033] FIG.

The terrain coefficient calculating unit 115 may calculate the terrain coefficient based on the estimated parameters. The terrain coefficient calculation unit 115 may calculate the terrain coefficient by substituting the calculated H, L _u , H _d , x and the height z from the ground surface for calculating the design wind speed into the above-described equation (2).

The target area setting unit 111, the information obtaining unit 112, the vertex candidate determining unit 113, the vertex height calculating unit 114 and the terrain factor calculating unit 115 execute a program for calculating the wind load to calculate the wind load And a processor for performing a calculation operation, for example, a CPU. In addition, the program may be stored in the storage unit 12, and the wind load calculation apparatus 100 may execute the program from the storage unit 12 and execute the program.

The wind load calculation apparatus 100 according to an embodiment of the present invention may further include an output unit 14. The output unit 14 may output the parameter or the wind load calculated according to an embodiment of the present invention and provide it to the user. According to one embodiment, the output unit 14 may include a display for visually displaying predetermined information, for example, an LCD, a PDP.

9 is a flowchart illustrating a method for calculating a wind load according to an embodiment of the present invention.

9, the wind load calculation method 300 includes the steps of setting (S310) a first target area 211 and a second target area 212 around a structure 31 (S310) (S320) of obtaining position information and height information for a plurality of points (X) in a first target area (211, 212) and a second target area (211, 212) The horizontal distance between each point in the second target area 212 and the structure 31 is subtracted and the horizontal distance between each point in the second target area 212 and the structure 31 is added to the initial value, (S340) of selecting at least three consecutive points among the plurality of points (X) in the order of the reference value (S340); calculating a reference value of the highest point among the three or more selected points, If it falls in the middle of the reference value of the point, A step S360 of determining a vertex candidate as a vertex candidate, a step S360 of setting a vertex of the vertex candidate having the shortest horizontal distance among the vertex candidates obtained from the plurality of points X as a vertex S360, (S370) setting the lowest point to the ground surface, and calculating a vertex height (H) by subtracting the height of the surface from the height of the vertex (S380).

According to one embodiment, the step S310 of setting the first target region and the second target region includes a first target region 211 and a second target region 212 symmetric with respect to the structure 31, May be set.

According to an exemplary embodiment, the step S310 of setting the first target area and the second target area may include the step of forming two sectorial regions having a predefined angle of vertex around the structure 31 as the first target region 211 ) And the second target area 212. [0033] FIG. Here, the nip angle may be greater than or equal to zero, and less than or equal to 180 degrees.

According to one embodiment, the step S320 of acquiring the position information and the height information includes an electronic map for a plurality of points X in the first and second target areas 211 and 212, And obtaining the positional information and the height information from at least one of the plurality of points X in the first target area 211, 212 and the measurement data obtained by measuring a plurality of points X in the second target area 211, 212.

According to another embodiment, the step S320 of acquiring the position information and the height information may include an electronic map for the first and second target regions 211 and 212, and an electronic map for the first and second target regions 211 and 212 , 212) of the plurality of points (X) using interpolation based on at least one of the plurality of points (X).

According to still another embodiment, the step S320 of acquiring the position information and the height information includes an electronic map for the first and second target regions 211 and 212, 211, 212) of the first and second target regions (211, 212) by using at least one of the plurality of points (X) And obtaining the position information and the height information of the position information.

According to one embodiment, the wind load calculation method 100 may further include calculating the terrain factor based on the peak height H.

The method 300 for calculating the wind load according to the embodiment of the present invention may be stored in a computer-readable recording medium that is manufactured as a program to be executed in a computer. The computer-readable recording medium includes all kinds of storage devices in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like.

According to the wind load calculation device and method, the surrounding terrain that is a wind load calculation standard can be determined objectively and quantitatively without being determined by the subjective judgment of the designer. As a result, the wind load that reasonably reflects the influence of the surrounding topography of the structure on the wind can be calculated, and the safety and economical efficiency of the structure can be improved.

100: Wind load calculation device
10:
11:
12:
13:
14: Output section
111: Target area setting unit
112: Information obtaining unit
113: vertex candidate determination unit
114: Vertical height
115: terrain coefficient calculation unit

Claims (17)

A target area setting unit setting a first target area and a second target area around the structure;
An information obtaining unit obtaining position information and height information of a plurality of points in the first and second target regions;
Subtracting a horizontal distance between each point in the first target area and the structure to a predetermined initial value using the position information and adding a horizontal distance between each point in the second target area and the structure to the initial value, Calculating a reference value for each point; Selecting at least three consecutive points among the plurality of points in order of the reference value; A vertex candidate determining unit that determines a vertex candidate as a vertex candidate when the reference value of the highest point among the three or more selected points corresponds to an intermediate point among the reference values of the selected three or more points;
A point at which a horizontal distance between the structures is the shortest among vertex candidates obtained from the plurality of points is set as a vertex, a lowest point among the plurality of points is set as an earth surface, A vertex height calculating unit for calculating a vertex height for calculating a wind load applied to the structure; And
And a terrain coefficient calculating unit for calculating a terrain coefficient based on the peak height. The method according to claim 1,
Wherein the first target area and the second target area are symmetrical about the structure. 3. The method of claim 2,
Wherein the first target region and the second target region are two fan-shaped regions having a preset angle of throttle. The method of claim 3,
Wherein the throttle angle is greater than or equal to zero and less than or equal to 180 degrees. The method according to claim 1,
Wherein the information obtaining unit comprises:
An electronic map for a plurality of points in the first and second target regions; And
Survey data obtained by surveying a plurality of points in the first and second target areas;
To obtain the position information and the height information from at least one of the plurality of wind load calculation devices. The method according to claim 1,
Wherein the information obtaining unit comprises:
An electronic map for the first and second target regions; And
Measurement data for the first and second target regions;
The position information and the height information of the plurality of points are obtained by interpolation based on at least one of the plurality of points. The method according to claim 1,
Wherein the information obtaining unit comprises:
Generating a digital elevation model for the first and second target regions using at least one of an electronic map for the first and second target regions and a survey data for the first and second target regions,
And obtains position information and height information of the plurality of points from the digital elevation model. delete Setting a first target area and a second target area around the structure;
Obtaining position information and height information for a plurality of points in the first and second target regions;
Subtracting a horizontal distance between each point in the first target area and the structure to a predetermined initial value using the position information and adding a horizontal distance between each point in the second target area and the structure to the initial value, Calculating a reference value for each point;
Selecting at least three consecutive points in the order of the reference value among the plurality of points;
Determining a corresponding point as a vertex candidate when the reference value of the highest point among the selected three or more points corresponds to an intermediate point among the reference values of the selected three or more points;
Setting a point at which a horizontal distance between the structures among the vertex candidates obtained from the plurality of points is the shortest as a vertex;
Setting the lowest point among the plurality of points as an earth surface;
Calculating a peak height for calculating a wind load applied to the structure by subtracting the height of the ground surface from the height of the peak; And
And calculating a terrain coefficient based on the peak height. 10. The method of claim 9,
Wherein the setting of the first target area and the second target area comprises:
And setting the first target area and the second target area symmetrical about the structure. 11. The method of claim 10,
Wherein the setting of the first target area and the second target area comprises:
And setting two sector regions having a predefined nip angle around the structure as the first target region and the second target region, respectively. 12. The method of claim 11,
Wherein the throttle angle is greater than or equal to zero and less than or equal to 180 degrees. 10. The method of claim 9,
The step of obtaining the position information and the height information includes:
An electronic map for a plurality of points in the first and second target regions; And
Survey data obtained by surveying a plurality of points in the first and second target areas;
And obtaining the positional information and the height information from at least one of the plurality of wind loads. 10. The method of claim 9,
The step of obtaining the position information and the height information includes:
Obtaining position information and height information of the plurality of points using an interpolation method based on at least one of an electronic map for the first and second target areas and survey data for the first and second target areas To calculate a wind load. 10. The method of claim 9,
The step of obtaining the position information and the height information includes:
Generating a digital elevation model for the first and second target areas using at least one of an electronic map for the first and second target areas and a survey data for the first and second target areas; And
Obtaining positional information and height information of the plurality of points from the digital elevation model;
To calculate a wind load. delete A computer-readable recording medium,
A recording medium on which a program for executing the wind load calculation method according to any one of claims 9 to 15 is recorded.

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