Method for measuring inter-layer displacement angle in ancient building wood structure space
By installing a wire displacement meter on the beams of the wooden structure of ancient buildings and measuring and calculating the displacement angle between layers, the cumbersome measurement process in the existing technology is solved, and the effect of simplifying the measurement method is achieved.
Patent Information
- Application Number
- CN202411941513.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-05-02
AI Technical Summary
The method of measuring the interlayer displacement angle of ancient building wooden structures in the prior art requires additional fixed reference points, which makes the measurement process cumbersome and inconvenient to be applied in complex structural experiments.
By installing a pull-line displacement meter on the beams of the wooden structure of ancient buildings, the distance between the geometric center of the pull-line displacement meter and the center of the intersection of the beam and column is measured, and combined with the displacement change value of the pull-line displacement meter, the interlayer displacement angle of the column head in the beam direction is calculated.
The horizontal lateral displacement and interlayer displacement angle of the stigma can be calculated without other fixed reference points, simplifying the measurement method and is suitable for structural testing and long-term structural monitoring of ancient building wooden structures.
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Figure CN119915238A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of measuring ancient building wooden structures, and in particular to a method for measuring an inter-story displacement angle of an ancient building wooden structure. Background Art
[0002] The inter-story displacement angle is an indicator used in building structure design to measure the relative displacement between floors when a building is subjected to horizontal forces (such as wind loads or earthquakes). Its main purpose is to ensure that the structure has sufficient lateral stiffness to avoid excessive displacement affecting the bearing capacity, stability and use requirements of the structure. In existing structural mechanics tests or structural monitoring of ancient wooden structures or their models, the method of measuring the inter-story displacement angle often requires additional fixed reference points to obtain the absolute displacement of the column heads of the ancient wooden structures to calculate the inter-story displacement angle, which is inconvenient in the process of complex structure testing and the process is cumbersome. Summary of the invention
[0003] In view of the shortcomings of the existing methods, the purpose of the present invention is to provide a method for measuring the inter-layer displacement angle in the wooden structure space of an ancient building, so as to solve the current technical problems such as complicated measurement process and the need to fix reference points to measure absolute displacement.
[0004] According to the present invention, a method for measuring inter-layer displacement angle in a wooden structure space of an ancient building is provided, comprising the following steps: S1: Determine the measurement position of the target ancient building wooden structure located at the i-th layer, the measurement position is the connection area between the beam and the column head of the ancient building wooden structure at the i-th layer, and the geometric center of the connection between the beam and the column head is the center of the beam-column intersection; S2: installing the main body of the wire displacement meter on the crossbeam at the measuring position, and fixing the wire end of the wire displacement meter on the column at the measuring position; S3: Measure the horizontal distance from the geometric center of the main body of the wire displacement meter to the center of the beam-column intersection at the measuring position, the vertical distance from the wire end of the wire displacement meter to the center of the beam-column intersection; and the vertical distance from the foot of the column to the center of the beam-column intersection; S4: Record the displacement change value measured by the wire displacement meter; S5: Calculate the inter-story displacement angle of the column head in the direction of the beam through the data recorded in the step S4 and the data measured in the step S3.
[0005] Among them, the interlayer displacement angle The calculation formula is as follows: In step S5, the horizontal lateral displacement of the column head in the direction of the beam can also be calculated. The calculation formula is as follows: .
[0006] Among them, in the above formula, a is the horizontal distance from the geometric center of the body of the wire displacement meter to the center of the intersection of the beam and column; b is the vertical distance from the wire end of the wire displacement meter to the center of the intersection of the beam and column; L is the column length, which is the vertical distance from the foot of the column to the center of the intersection of the beam and column, and X is the displacement value measured by the wire displacement meter.
[0007] Wherein, in step S1, i represents the number of layers where the measuring part is located, i is at least 1, and the value of i is determined according to the number of layers of the ancient building wood structure model. In step S1, the ancient building wood structure has structures such as beams and columns; the ancient building wood structure in this article includes not only the main body of the ancient building wood structure, but also its full-scale or scaled model, and can also include modern buildings built with beam frame structure and having a similar structure to the ancient building wood structure; in the connection area, the beam and the column head are connected by mortise and tenon joints; the column at the measuring part intersects the beam vertically, and the geometric center of the intersection of the beam and the column head is the center of the beam-column intersection.
[0008] Wherein, in step S2, the wire displacement meter is installed on the crossbeam, such as the outer side of the crossbeam, and is directed obliquely downward in the direction of the column, and the wire end of the wire displacement meter is fixed on the column, such as the outer side of the column; the straight line formed by the wire between the body of the wire displacement meter and the wire end of the wire displacement meter is parallel to the plane formed by the crossbeam and the column.
[0009] Wherein, in the step S4, a structural mechanics test is performed on the wooden structure of the ancient building, and the readings measured by the wire displacement meter during the test are recorded; during the test, the beam is kept horizontal relative to the ground.
[0010] Wherein, in the step S4, when the wire of the wire displacement meter is stretched, the displacement value is a positive number; when the wire of the wire displacement meter is contracted, the displacement value is a negative number.
[0011] Wherein, the measuring part includes beams in different directions, and the horizontal lateral displacement and inter-story displacement angle of the column head in the corresponding different directions are calculated. By performing displacement synthesis on the horizontal lateral displacements in different directions, the vector displacement value of the column head can be obtained.
[0012] The measuring part includes a beam in the first direction and a beam in the second direction. The beams in the first direction, the beams in the second direction and the column head intersect each other vertically. The geometric center of the intersection is the center of the intersection of the beam and the column. The horizontal lateral displacement and the inter-story displacement angle of the column head in the first direction, and the horizontal lateral displacement and the inter-story displacement angle in the second direction are calculated. The vector displacement value of the column head is obtained through the horizontal lateral displacement in the first direction and the second direction.
[0013] According to the method provided by the present invention, the horizontal lateral displacement of the column capital and the inter-layer displacement angle of the column capital can be calculated without other fixed reference points, which simplifies the measurement method and can be used for structural tests of various ancient building wooden structures or their models, and can also be used for long-term structural monitoring of various ancient building wooden structures. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 A flow chart showing a method for measuring inter-layer displacement angle of a wooden structure of an ancient building provided by an embodiment of the present invention is shown; Figure 2 The diagram shows the measurement position of the interlayer displacement angle of the ancient building wooden structure and the installation method of the wire displacement meter provided by the embodiment of the present invention; Figure 3 Shows Figure 2 An enlarged view of the part shown in; Figure 4 Shows Figure 3 A top view of the structure shown in; Figure 5 Shows Figure 3 A side view of the structure shown in; Figure 6 A schematic diagram showing the measurements of a, b and c in step S3 provided in an embodiment of the present invention is shown; Figure 7 A schematic diagram of measuring the column length L in step S3 provided in an embodiment of the present invention is shown; Figure 8 A schematic diagram showing the positive direction displacement of the beam in the first direction and the beam in the second direction provided by an embodiment of the present invention; Fig. 9 A schematic diagram showing a situation in which the wire of the wire displacement meter provided by the embodiment of the present invention is stretched; Fig.10 A schematic diagram showing the situation when the wire of the wire displacement meter provided by the embodiment of the present invention is contracted. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0017] At present, in order to gain a deeper understanding of the mechanical properties of the wooden structure of ancient buildings, it is often necessary to conduct mechanical tests on the entire or partial structure of the wooden structure of ancient buildings or their models. During the test, the inter-story displacement angle of the structure is an important indicator of the structural lateral resistance and energy consumption. In addition, in order to conduct long-term structural health monitoring of the wooden structure of ancient buildings, it is also necessary to measure the inter-story displacement angle and horizontal displacement value of the structure, so as to remind maintenance personnel to handle it when it exceeds the warning line. However, the method of measuring or extracting the inter-story displacement angle in the prior art is relatively cumbersome, and it is necessary to set a fixed reference point and calculate the absolute displacement.
[0018] To solve this problem, the present invention provides a method for measuring the interlayer displacement angle in the space of an ancient building's wooden structure. The technology can be applied to guide the measurement or calculation of the interlayer displacement angle in multiple directions in the space during the mechanical test of the ancient building's wooden structure or the long-term structural monitoring of the ancient building's wooden structure, so as to simplify the measurement steps and facilitate the experimenters to arrange the sensors and obtain the experimental data; and there is no need to fix the reference point or measure the absolute displacement.
[0019] The embodiments of the present invention are described in detail below. Figure 1 The flow chart of a method for measuring the interlayer displacement angle of the first layer of a wooden structure of an ancient building in a structural mechanics test provided by an embodiment of the present invention is shown. The measuring method according to the present invention comprises the following steps: S1: Determine a measurement location on the first floor of the target ancient building wooden structure, the measurement location includes the connection area of the beam and the column head of the ancient building wooden structure on the first floor, and the geometric center of the connection between the beam and the column head is the center of the beam-column intersection; S2: Install the main body of the wire displacement meter on the crossbeam of the selected measuring position, and fix the wire end of the wire displacement meter on the column of the measuring position; S3: Measure the horizontal distance from the geometric center of the cable displacement meter to the center of the beam-column intersection, the vertical distance from the cable end of the cable displacement meter to the center of the beam-column intersection; and the vertical distance from the column foot to the center of the beam-column intersection; S4: Conduct structural mechanics tests on the wooden structure of the ancient building and record the displacement values measured by the wire displacement meter during the test; S5: Calculate the horizontal lateral displacement of the column head in the direction of the beam and the inter-story displacement angle at a certain moment through the data recorded in step S4 and the data measured in step S3.
[0020] According to the present invention, in step S1, in the connection area of the measuring part, the connection mode of the beam and the column head is mortise and tenon connection; in space, the area should contain a part of the column structure and the beam structure. The column and the beam of the measuring part intersect vertically, that is, before the structural mechanics test begins, the beam and the column are not deformed, and the angle between the beam and the column head is a right angle. The geometric center of the intersection of the beam and the column head is the center of the beam-column intersection.
[0021] In a specific embodiment, the measuring part includes beams in different directions, and the beams in different directions intersect with the column head perpendicularly, and the geometric center of the intersection is the center of the intersection of the beam and the column.
[0022] According to the present invention, the measuring position is selected according to the need, and one connection area corresponds to one measuring position. Each layer of the ancient building wooden structure can contain multiple measuring positions.
[0023] like Figure 2 As shown, the measurement part 100 is the connection area between the column head of the column 2 and the crossbeam 1, including the structure of part of the column 2 and the crossbeam 1. The crossbeam includes a crossbeam in the first direction and a crossbeam in the second direction. The two crossbeams 1 and the column heads of the column 2 intersect each other perpendicularly, and the geometric center of the intersection is the intersection center of the beam and column. Figure 7 101 of .
[0024] According to the present invention, in step S2, the wire displacement meter is a displacement measuring device, which has a stretchable steel wire or steel line, called a wire, and the end of the wire is called a wire end. The wire displacement meter is characterized in that the mechanical displacement between the wire end and the wire displacement meter body can be converted into an electrical signal that can be measured, recorded or transmitted, and the electrical signal is converted into a specific displacement size by a computer. When relative movement occurs between the wire end and the wire displacement meter body, the wire stretches and contracts, the internal spring ensures that the tension of the wire remains unchanged, and the threaded hub drives the precision rotary sensor to rotate, outputting an electrical signal proportional to the distance the wire moves, and the computer can derive the displacement, direction or speed of the moving object by measuring the output signal. The wire displacement meter used in the present invention can be a common device model on the market.
[0025] According to the present invention, in step S2, Figure 3-Figure 5 As shown, the body 4 of the wire displacement meter is installed on the outside of the crossbeam, and is oriented obliquely downward toward the direction of the column. The wire end 6 of the wire displacement meter is fixed on the outside of the column.
[0026] According to the present invention, in step S2, during the installation and fixing process of the wire displacement meter, the straight line formed by the wire 5 of the wire end 6 between the body 4 of the wire displacement meter is parallel to the plane formed by the beam 1 and the column 2 where the wire displacement meter is located. If the beam or column is too thick to remain on the specified plane, it may be considered to add a gasket under the wire displacement meter or adjust the distance between the wire end and the column surface. When there are beams in different directions or two perpendicular beams at the measuring position 101, the straight line formed by the wire between the body of the wire displacement meter installed on the corresponding beam and the wire end is parallel to the plane formed by the corresponding beam and the column.
[0027] According to the present invention, Figure 6 As shown, the horizontal distance from the geometric center 4-1 of the body 4 of the measuring wire displacement meter to the center 101 of the beam-column intersection of the measuring part is recorded as a, and the vertical distance from the wire end 6 of the measuring wire displacement meter to the center 101 of the beam-column intersection is recorded as b. Figure 7 As shown, the vertical distance from the foot of the column 2 to the center 101 of the intersection of the beam and the column is measured as L. When there are multiple beams at the measurement location, the a value and b value involved in the corresponding wire displacement meter are measured respectively. The above values also reflect the spatial geometric relationship between the model, the measurement location and the wire displacement meter.
[0028] According to the present invention, in step S4, the structural mechanics test is a static or dynamic test commonly used in the art, such as a quasi-static hysteresis test or a shaking table test for the entire or partial wooden structure of an ancient building. Before conducting the structural mechanics test, the installed wire displacement meter is debugged to ensure that its reading is sensitive and accurate, and its reading is adjusted to zero. Furthermore, during the debugging process, it is stipulated that the wire of the displacement meter is stretched to be positive, and the displacement is in the positive direction, and the wire is shortened to be negative, and the displacement is in the negative direction. Generally speaking, the process can be completed on a computer or any other type of sensor data acquisition terminal.
[0029] According to the present invention, in step S4, the displacement change value measured by the wire displacement meter is the relative change value of the displacement between the body and the wire end, that is, the reading of the wire displacement meter, recorded as X, and the reading and recording process should use a computer or any other type of sensor data acquisition terminal. Obviously, when the angle between the beam and the column (the column head of the crossbeam and the column) becomes larger, that is, the wire of the wire displacement meter is elongated, the displacement value, that is, the reading X is a positive value; when the angle between the beam and the column becomes smaller, that is, the wire of the displacement meter is shortened, the displacement value, that is, the reading X is a negative value; in addition, during the test, the data collection and reading should be continuous, the collected data should be time-series, and the reading in the data should be reasonable and have practical physical meaning; after the test is completed, it should be ensured that the wire displacement meter is still in normal working condition, the displacement meter and the wire end are not detached, the connecting wire is intact and undamaged, and a reasonable displacement meter reading with practical physical meaning can be obtained on the computer. And during the test, the crossbeam remains horizontal relative to the ground, that is, the axial deformation and bending of the column during the deformation process are ignored.
[0030] According to the present invention, the horizontal lateral displacement of the column head of the column in the direction of the beam at a certain moment is calculated by the recorded data in step S4 and the measured data in step S3, and the inter-story displacement angle of the column head of the column in the direction of the beam at that moment is calculated by the horizontal lateral displacement. When there are multiple beams in different directions at the measuring part, the horizontal lateral displacement of the column head in the corresponding direction is calculated according to the a value and b value and the reading of the wire displacement meter on the corresponding beam, and then the inter-story displacement angle of the column head in the corresponding direction of the column head of the layer is calculated.
[0031] According to the present invention, the positive direction of the horizontal lateral offset is calibrated by the positive or negative reading of the wire displacement meter in that direction; wherein, when the column head offset causes the wire of the wire displacement meter in the corresponding direction to be elongated, the offset direction is a positive direction and the reading is a positive number; and when the column head offset causes the wire displacement meter in the corresponding direction to be shortened, the offset direction is a negative direction and the reading is a negative number.
[0032] by Figure 8 For example, the beam in the first direction (X axis) is perpendicular to the beam in the second direction (Y axis); the angle between the beam in the first direction and the column head becomes larger, the cable of the cable displacement meter is elongated, and its direction is recorded as the positive direction of X; the angle between the beam in the second direction and the column head becomes larger, the cable of the cable displacement meter is elongated, and its direction is recorded as the positive direction of Y, such as Figure 8 Indicated by the direction of the arrow.
[0033] According to the present invention, in step S5, the calculation process of the horizontal lateral displacement includes: calculating the initial cable length by the Pythagorean theorem through the horizontal distance a and the vertical distance b measured in S3, which is recorded as c0; obtaining the length of the cable during the test by the change X of the tensile or compressed length of the displacement meter during the test, which is recorded as c1; using the cosine theorem to calculate the change of the angle between the beam and the column at the measuring position during the test in the triangle formed by the horizontal distance a, the vertical distance b and the cable length c1, the angle between the beam and the column during the test is recorded as θ1; calculating the offset angle of the column head at the measuring position of the first floor, the offset value of the column head and the inter-story displacement angle by the spatial angle relationship and the sine theorem. The offset angle is recorded as θ2, and the offset value of the column head is recorded as Δ.
[0034] The following uses a beam in one direction to illustrate the calculation principle of its horizontal lateral displacement and inter-story drift angle; beams in other directions can refer to this calculation. The horizontal lateral displacement and inter-story drift angle of other measurement locations on the same layer or measurement locations on other layers can refer to this calculation.
[0035] like Fig. 9 As shown, from the horizontal distance a, the vertical distance b, the Pythagorean theorem and the geometric relationship, the length of the hypotenuse before deformation, i.e. the initial length of the wire c0, and the length of the hypotenuse after deformation, i.e. the length of the wire during the experiment c1, can be obtained as shown below: In the general triangle formed by the horizontal distance a, the vertical distance b and the length of the cable c1, the angle θ1 between the beam and column corresponding to the c side can be obtained by the cosine theorem, as shown below: From the geometric relationship of the angles in the plane, the inclination angle θ2 of the column relative to the horizontal can be obtained as follows: The horizontal offset value Δ and the inter-story displacement angle of the column head in the direction of the beam can be calculated by the inclination angle. / L: / L = sin θ 2 Combining the above formulas and eliminating the intermediate variables, the interlayer displacement angle can be obtained The relationship between / L and the horizontal distance a, vertical distance b, and the reading of the wire displacement meter X, as well as the relationship between the horizontal offset value Δ and the horizontal distance a, vertical distance b, the reading of the wire displacement meter X, and the column length L: A positive value indicates that the angle between the beam and the column head in this direction becomes larger and the displacement is positive; A negative value indicates that the angle between the beam and the column head in this direction becomes smaller and the displacement is negative.
[0036] like Fig.10 As shown, when the tension wire is shortened, since θ1 is less than 90°, θ1-90°<0, and θ2 is negative. The column head displacement calculated on the sin function is also negative, which is consistent with the positive direction assumption.
[0037] According to the present invention, according to the horizontal lateral displacement values of the column head of the column at the measurement position in each direction, the vector displacement value of the column head at the corresponding moment can be obtained by synthesis, and its magnitude and direction follow the decomposition and synthesis law of the vector. The offset position of the column head in space at any moment during the test or monitoring process can be determined by the vector displacement value of the column head, and then the degree of structural deformation and damage mechanism can be studied in depth.
[0038] The technical solution of the present invention simplifies the measurement and acquisition method of the interlayer displacement angle, and can easily obtain the interlayer displacement angles in multiple directions in the space of the ancient building wood structure. The method does not need to arrange external reference points to obtain absolute displacement, has the advantages of simple device layout, and little impact on the structure body. The technical solution of the present invention can be used in structural tests or long-term structural monitoring of ancient building wood structures.
[0039] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0041] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.
Claims
1. A method for measuring the inter-layer displacement angle in the space of an ancient building wooden structure, comprising the following steps: S1: Determine the measurement position on the i-th layer of the target ancient building wooden structure, the measurement position is the connection area between the beam and the column head of the ancient building wooden structure at the i-th layer, and the geometric center of the connection between the beam and the column head is the center of the beam-column intersection; S2: installing the main body of the wire displacement meter on the beam, and fixing the wire end of the wire displacement meter on the column; S3: Measure the horizontal distance from the geometric center of the main body of the wire displacement meter to the center of the intersection of the beam and column, the vertical distance from the wire end of the wire displacement meter to the center of the intersection of the beam and column; and the vertical distance from the foot of the column to the center of the intersection of the beam and column; S4: Record the displacement change value measured by the wire displacement meter; S5: Calculate the inter-story displacement angle of the column head in the direction of the beam through the data recorded in the step S4 and the data measured in the step S3.
2. The method according to claim 1, characterized in that The inter-story displacement angle The calculation formula is as follows: Among them, a is the horizontal distance from the geometric center of the body of the wire displacement meter to the center of the intersection of the beam and column; b is the vertical distance from the wire end of the wire displacement meter to the center of the intersection of the beam and column; L is the column length, which is the vertical distance from the foot of the column to the center of the intersection of the beam and column, and X is the displacement value measured by the wire displacement meter.
3. The method according to claim 1 or 2, characterized in that: In step S5, the horizontal lateral displacement of the column head in the direction of the beam is calculated. The calculation formula is as follows: Among them, a is the horizontal distance from the geometric center of the body of the wire displacement meter to the center of the intersection of the beam and column; b is the vertical distance from the wire end of the wire displacement meter to the center of the intersection of the beam and column; L is the column length, the vertical distance from the foot of the column to the center of the intersection of the beam and column, and X is the displacement value measured by the wire displacement meter.
4. The method according to claim 1, characterized in that: In the step S1, in the connection area, the connection between the crossbeam and the column head is a mortise and tenon connection; and / or, in the step S1, the column and the crossbeam intersect vertically.
5. The method according to claim 1, characterized in that In step S2, the wire displacement meter is installed on the crossbeam, with the direction being obliquely downward toward the direction of the column, and the wire end of the wire displacement meter is fixed on the column; the straight line formed by the wire between the body of the wire displacement meter and the wire end of the wire displacement meter is parallel to the plane formed by the crossbeam and the column.
6. The method according to claim 1, characterized in that In the step S4, when the wire of the wire displacement meter is stretched, the displacement value is a positive number; when the wire of the wire displacement meter is contracted, the displacement value is a negative number.
7. The method according to claim 1, characterized in that In step S4, a structural mechanics test is performed on the wooden structure of the ancient building, and the readings measured by the wire displacement meter during the test are recorded; during the test, the beam is kept horizontal relative to the ground.
8. The method according to any one of claims 3 to 7, characterized in that: The measuring part includes beams in different directions, and the horizontal lateral displacement and inter-story displacement angle of the column head in the corresponding different directions are calculated.
9. The method according to claim 8, characterized in that The measuring part includes a beam in a first direction and a beam in a second direction. The beams in the first direction, the beams in the second direction and the column heads intersect each other perpendicularly. The geometric center of the intersection is the center of the beam-column intersection. The horizontal lateral displacement and the inter-story displacement angle of the column head in the first direction, and the horizontal lateral displacement and the inter-story displacement angle in the second direction are calculated.
10. The method according to claim 8 or 9, characterized in that: Through horizontal lateral displacements in different directions, the vector displacement value of the column head is obtained by vector synthesis of the displacements.