JP2007064800A - Building diagnosis system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building diagnosis system acquiring damage degree within a structure and diagnosing earthquake-proof degradation without resort to judgment of experts, in ordinary use conditions without the removal of finishing material, furniture and the like. <P>SOLUTION: The building diagnosis system is characterized by diagnosing damage degree such that after a reference point A is set at any site of a building structure, a detection point B is prepared on an inclined plane facing interspatially to the reference point A along the vertical direction, and a distance from the reference point A to the detection point B is detected by a detecting means, the difference Y<SB>1</SB>is obtained between the detected value and a value of the distance between the reference point A and the detection point B detected to accumulate at the time of building construction and thus, based on the difference, one-dimensional horizontal displacement or the displacement X<SB>1</SB>in horizontal direction of the building structure, is determined. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a building diagnosis system for diagnosing a building damage level, for example, a building damage level due to an external load such as an earthquake or wind pressure.

  Generally, metal or wooden building materials are used for buildings, and these building materials are known to deteriorate over time. For example, building materials such as nails and fences that have been used for many years are corroded by rainwater or rusted. The building itself deteriorates due to the aging of these building materials. Due to the deterioration of building materials over time, the basic seismic performance provided at the time of building construction is impaired. In order to scientifically diagnose the degree of this impaired basic seismic performance, a deterioration survey of building diagnosis is conducted.

  However, there are two types of conventional deterioration investigations: analysis of building data related to basic seismic performance and observation of actual buildings. The former is simple because it can be performed on a desk, but there is a problem that much time is required for collecting the data. In addition, there is a problem that the design information is large from the architectural drawing used to judge the degree of deterioration, and the completion information actually processed and assembled at the site tends to be insufficient, and the accuracy of deterioration diagnosis is poor.

  On the other hand, the latter is generally a so-called indirect method for evaluating the state of cracks and corrosion appearing on the surface of the building material by visual observation. Therefore, since the degree of damage inside the building structure cannot be visually confirmed, diagnosis information may be performed without understanding. Therefore, there is a problem that this diagnosis result is inaccurate. Also, in order to grasp the degree of damage inside the building structure, there are many survey items to detect the initial seismic performance of the building structure, even if all the finishing materials are removed and investigated. There is a problem that cannot be investigated.

  Therefore, in order to solve the problems of conventional building diagnosis, the attic, underfloor, etc. are continuously monitored by monitoring devices such as a super-sensitive night vision camera, laser vertical device, metal detector, etc. A seismic diagnosis system is known in which monitoring information is transmitted to a construction contractor together with a user who is a site via the site, and reinforcement work is requested (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2002-89052

  However, since this seismic diagnosis system has a limited number of parts that can be monitored, the content of the obtained information is local and the accuracy of diagnosis of the degree of damage is low. For example, although the underfloor deformation is confirmed and reinforcement work is performed, the entire structure of the building has no problem, and thus there is a problem that unnecessary reinforcement work is performed and an unexpected disadvantage is given to the user. In addition, there is a problem that the entire structure collapses due to deformation of other parts that cannot be monitored despite the fact that deformation under the floor cannot be confirmed and it is determined that the reinforcement work is unnecessary.

  Moreover, when performing a strict building diagnosis, for example, a specialist such as a first-class architect is requested to investigate to remove all finishing materials from the building structure. In this case, there is a part that cannot be investigated, and there is a problem that it cannot be said to be sufficient for judging the degree of deterioration of the initial seismic performance that the structure had. In addition, there is a problem that a lot of costs and labor are spent on degradation investigations such as finishing material removal costs, specialist travel costs, specialist accommodation costs, data collection, and medical certificate creation.

  Therefore, the present invention solves the problems of the conventional seismic diagnosis system, diagnoses the degree of deterioration of the entire structure, does not require an expert to investigate, and further eliminates the need for finishing materials, furniture, etc. An object of the present invention is to provide a building diagnosis system that diagnoses the degree of damage inside a structure in a state in which the structure is normally used.

  In order to achieve the above object, according to the first aspect of the present invention, a reference point is provided at an arbitrary part of a building structure, and a detection point is provided on an inclined surface opposed to the reference point in the vertical direction across the space. The distance from the reference point to the detection point when an external load such as wind pressure is generated is detected and accumulated, and the amount of horizontal displacement of the building structure from the difference between the same two points before the external load occurs The degree of damage is diagnosed by obtaining the one-dimensional horizontal displacement amount.

  The invention according to claim 2 is the invention according to claim 1, wherein a laser displacement meter is installed at the reference point, and the inclined surface on which the detection point is disposed is integrated with the horizontal member of the building structure or in contact with the horizontal member. Formed on the bottom surface of the concave groove formed on the lower surface of the member exhibiting behavior, forming the laser beam emitted from the light source of the laser displacement meter on the bottom surface of the concave groove, and transmitting the laser beam from the laser displacement meter to the concave groove The distance from the reference point to the detection point is detected by irradiating the light source with the light reflected from the bottom surface.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein a second inclined surface orthogonal to the other side from the one side is formed above the inclined surface and connected to the inclined surface. By providing a second detection point on the second inclined surface and detecting the distance from the reference point to the second detection point, the two-dimensional horizontal displacement amount of the building structure on the second inclined surface is obtained.

  The invention according to claim 4 is the invention according to claim 3, wherein either one-dimensional horizontal displacement amount or two-dimensional horizontal displacement amount is recorded while being continuously monitored, and the displacement characteristic value during earthquake of the building structure is recorded. By comparing with, we diagnose the damage of building structures due to earthquakes.

  The invention according to claim 5 is the invention according to claim 3, wherein either one of the one-dimensional horizontal displacement amount or two-dimensional horizontal displacement amount is recorded while being continuously monitored, and at the construction site of the building structure. Diagnose the damage of building structures by earthquakes by comparing with observation data.

  The invention according to claim 6 is the invention according to claim 4 or 5, further comprising a diagnostic means for diagnosing the degree of damage to the building and a personal computer for displaying the diagnostic result.

  The present invention is as described above, wherein a reference point is provided at an arbitrary part of a building structure, and a detection point is provided on an inclined surface facing the reference point in a vertical direction across the space from the outside, such as an earthquake or wind pressure. One-dimensional that is the amount of horizontal displacement of the building structure from the difference between the same two-point distance before the external load is generated by detecting and accumulating the distance from the reference point to the detection point when the load is generated Since the degree of damage is diagnosed by determining the amount of horizontal displacement, damage to the interior of the structure can be done in a state where the building structure is normally used without removing finishing materials, furniture, etc., and without relying on expert judgment There is an excellent effect that the degree can be grasped and the degree of deterioration can be accurately diagnosed.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The building diagnosis system according to the embodiment diagnoses the degree of damage to a building structure that has received an external load such as an earthquake or wind pressure. The external load is generated by an earthquake, wind pressure, or the like. Hereinafter, the case of an earthquake will be described as an example.

  FIG. 1 is a front view showing an outline of a building structure in which the building diagnosis system showing the first embodiment is installed, FIG. 2 is a schematic front view showing before and after an earthquake with columns omitted for convenience, and FIG. FIG. 4 is a schematic diagram showing an Internet communication network constructed by a LAN line in a user's building structure and a client PC of a house maker, and FIG. 4 is a graph showing a correlation between earthquake attributes and building attributes.

  As shown in FIG. 1, the building structure 1 has a base 3 laid on a foundation 2 embedded in the ground, and columns 4 a and 4 b erected on the left and right sides of the base 3. The horizontal member 5 is joined to the left and right columns 4a and 4b to form a framework, and a panel (not shown) produced at the factory is assembled between the right column 4a and the left column 4b of the framework. The laser displacement meter 7 is installed on a reference point disposed at an arbitrary position on the base 3 and is recessed on the lower surface of the horizontal member 5 facing the irradiation port of the laser displacement meter 7 in the vertical direction across the space. The bottom surface 6 of the groove is formed to be inclined, and the bottom surface of the concave groove is configured to reflect the laser beam. A recorder 8 for recording the observation value by the laser displacement meter 7 is connected to the laser displacement meter 7, and this recorder 8 is connected to a client personal computer (PC) 11a. The client personal computer 11a is connected to a database 12 in which observation data is stored via a communication network. The database 12 is connected to a server 13, and the client personal computer 11a, the database 12, the server 13 and the like construct a network. In addition, you may form the bottom face 6 of a ditch | groove not on the lower surface of the horizontal member 5, but on the lower surface of the member which touches the horizontal member 5 and shows an integral behavior.

As shown in FIG. 2, the building structure 1 includes an inclined surface 6 having a uniform width from the bottom surface of the horizontal member 5 to the longitudinal direction of the horizontal member 5. The horizontal member 5 has an inclination angle corresponding to the maximum horizontal displacement amount (indicated by an arrow in FIG. 2) expected at the time of the earthquake and the resolution of the laser displacement meter 7. A horizontal member 14 is disposed below the horizontal member 5, and a through hole 14 a is drilled in the horizontal member 14 in a direction orthogonal to the longitudinal direction of the horizontal member 14 at a site through which the laser beam passes. It is installed. In FIG. 2, the inclined surface 6 before the displacement due to the earthquake is shown using a solid line, and the one after the displacement is shown using a broken line. The displacement amount of the inclined surface 6 before and after the displacement is indicated by “horizontal displacement X ₁ and vertical displacement Y ₁ ”.

Next, describing calculation of the one-dimensional horizontal displacement X _1. By reflecting the laser light emitted from the laser displacement meter 7 to the laser displacement meter 7 at the detection point B of the inclined surface 6, the time t from the start of radiation to the reception of light is measured. Based on the measured time t and the velocity v of the laser beam, the distance l from the reference point A to the detection point B is calculated by l = (v × t) / 2. Then, the difference between the value ₁₀ of the distance from the reference point A to the detection point B calculated during construction of the building structure 1 and the current calculated value l, that is, the increase / decrease in the calculated distance Y ₁ = | l ₀ −l | Ask. Based on the difference, obtaining a one-dimensional horizontal displacement X _1.

Horizontal displacement X _{1 is} specifically calculated by the equation 1 shown below.

X ₁ = Y ₁ / tan θ ₁ (Formula 1)
Here, X _{1 represents} the one-dimensional horizontal displacement amount of the inclined surface 6, θ ₁ represents the inclination angle of the inclined surface 6, and Y ₁ represents the vertical displacement amount of the inclined surface 6.

  As described above, when laser light is emitted from the laser displacement meter 7 to the inclined surface 6, there is a concern that the laser light may be reflected at the angle of the reflection surface and not return to the laser displacement meter 7, but the laser light is reflected. According to the inventors' experiment of measuring the distance between two points by applying a laser beam to the inclined surface 6 with the reflecting plate attached, it is within the practical range even if the angle of the inclined surface is changed from 0 degrees to about 90 degrees. It was confirmed that. However, in the experiment, the blue reflector with a short measurement distance was outside the effective measurement range when the tilt angle of the reflector was nearly horizontal. It was found that it was affected by the color of the sheath.

  The displacement information measured by the laser displacement meter 7 is recorded in the recorder 8, and the client personal computer 11 a diagnoses the building structure 1 by calculating the displacement information recorded in the recorder 8. Further, the laser displacement meter 7 is energized for 24 hours together with the recorder 8 to measure earthquakes and is always in operation. The recorder 8 can always receive and record displacement information from a detection device such as a laser displacement meter. To wait.

  Next, the manner in which the housing manufacturer processes the displacement information of the building structure will be described with reference to FIG. The recorder 8 in the building structure 1 includes a nonvolatile memory 16 and a CPU 17 and is connected to the client personal computer 11a via a LAN line. The client personal computer 11a has a display (not shown) and is connected to the server 13 of the house maker via the Internet line. The server 13 is connected to the client personal computer 11b, and the client personal computer 11a and the client personal computer 11b are capable of bidirectional communication.

  When the recording device 8 receives data from the detection device such as the laser displacement meter 1, the recording is performed in the memory 16 by a so-called first-in first-out method in which the displacement information written first is read first. When the amount of displacement information exceeds the capacity limit of the displacement information recording memory 16, the displacement information is deleted in order from the oldest and recorded in order of newest information.

  When the client personal computer 11a receives from the client personal computer 11b the presence of observation data due to the occurrence of an earthquake, the client personal computer 11a receives the displacement information recorded in the recorder 8 using the observed date and time as a key. Information is searched, and the degree of damage is diagnosed by comparing the searched displacement information with the characteristic data previously recorded in the client personal computer 11a. Then, it is classified according to the diagnosis level without danger, caution, or problem, and the diagnosis result is displayed on a display (not shown) of the client personal computer 11a.

  Characteristic data, diagnosis results, and displacement information are recorded in the memory 16 and at the same time on the server 13 of the house maker via the Internet communication network by the communication function. Then, the house maker displays the presence / absence of damage due to the earthquake and the deterioration diagnosis result using the client PC 11b of the house maker based on the observation data recorded in the server 13, and informs the user of the state of the building structure 1 Can be used for planning and implementation of post-earthquake repair work, use for after-sales service, and future simulations. The degree of damage of the building structure due to the earthquake may be diagnosed by comparing the displacement characteristic value Xe, which is characteristic data of the building structure 1 at the construction site, with the displacement data at the construction site.

  Next, the displacement characteristic value Xe will be described with reference to FIG. In FIG. 4, the horizontal axis direction represents building attributes, and the vertical axis direction represents earthquake attributes. Building attributes become stronger as you go to the right and weaker as you go to the left. Moreover, the earthquake attribute becomes stronger as it goes up and becomes weaker as it goes down. The displacement characteristic value Xe is determined from a matrix in which the earthquake attribute and the building attribute corresponding to the building structure 1 to be diagnosed intersect. The earthquake attributes include maximum acceleration, maximum speed, dominant period, duration, and the like, and the building attributes include bearing wall type, wall length / required wall length, eccentricity, and the like. In FIG. 4, the matrix corresponding to the degree of damage divided by broken lines is the degree of damage to the building structure 1. The degree of damage illustrated is determined by a relatively strong building attribute and a weak earthquake attribute, and corresponds to “accessory damage = none”. The displacement characteristic value Xe becomes more reliable as more of the above-mentioned attributes are incorporated. However, there are limits to the required displacement detection accuracy and the number of conditions for prior experiments. The horizontal displacement (unit: mm) is determined from the above, and a matrix that is the basis for building diagnosis is created. In this case, the magnitude of the horizontal displacement is directly affected by damage to the building finishing materials and accessories such as equipment, as well as diagnosing damage as a structure. You can also. Further, the displacement characteristic value Xe is “interlayer displacement” and is represented by a ratio to the height. When assuming a building diagnostic system whose height changes according to the building structure 1, the displacement characteristic value Xe is expressed as, for example, “n / 1000” as a ratio to the height.

  The seismic attributes included in the observation data can be obtained from an earthquake observation network (for example, K-net, Hi-net, etc.) published on the Internet. On the other hand, building attributes do not depend only on the amount of walls and the type of walls. The number of attributes described in FIG. 4 is an example, and the actual number of matrices may increase more than this. If it is insufficient, the shortage is calculated by a predetermined formula and compensated.

  As shown in FIG. 5, when displacement information and angle information, which are displacement data, are written together in the same graph, the displacement gradually oscillates from zero and begins to oscillate in the opposite direction when reaching an arbitrary peak value. In other words, the earthquake shakes in both directions around a single point, so that it shakes in the opposite direction when a predetermined amplitude shakes. Next, when it reaches an arbitrary peak value, it shakes in the opposite direction and repeats the vibration while being attenuated. The peak value is not constant in both the forward and reverse directions, but passes through the same angle as indicated by the black dot in the angle information.

  If the direction of the earthquake shake completely coincides with the direction perpendicular to the inclination direction of the inclined surface 6, it is feared that the degree of damage to the building structure 1 cannot be diagnosed. It is known from past observation data that the S wave (lateral wave) has acceleration of two horizontal components (generally in the north-south direction and the east-west direction) in earthquake observation. Therefore, if a direction orthogonal to the inclination direction of the inclined surface 6 is provided while avoiding the two horizontal components, measurement is not disabled.

Thus the one-dimensional horizontal displacement X ₁ refers to the increase or decrease of the horizontal direction of the detection distances determined on the basis of the increase or decrease Y ₁ in the vertical direction of the detection distance. One-dimensional horizontal displacement X ₁ is can not be decomposed in only one direction displacement due to an earthquake, it is incorrect to exactly analyze the displacement data.

  In order to eliminate this point, the second implementation was devised to break down the force applied to the building structure 1 by the earthquake into two axial components, a horizontal force and a force perpendicular to the horizontal force. This second embodiment will be described below. FIG. 6 is a schematic front view corresponding to FIG. 2 showing the state of the inclined surface and the reference point before and after the earthquake according to the second embodiment, which is indicated by a solid line before the movement of the inclined surface and a broken line after the movement. ing. FIG. 7A is a perspective view showing details of the movement of the building and the relative movement of the laser light on the slope and the second inclined surface, and FIG. 7B is the second inclination where the laser light moves. It is an expansion perspective view which shows the detail of a surface.

  In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In FIG. 6, a second inclined surface 15 perpendicular to the inclined direction of the inclined surface 6 is formed on the inclined surface 6 from the one side to the other side so as to be connected to the inclined surface 6. A second detection point C is disposed on the two inclined surfaces 15.

Determination of horizontal displacement X ₁ is omitted because it is similar to the first embodiment. As shown in FIG. 7B, a second inclined surface 15 having an inclination angle θ ₂ is disposed from one side of the inclined surface 6 to the other side perpendicular to the inclination direction of the inclined surface 6.

Next, the operation will be described. Fig.8 (a) is the top view seen from the downward direction of the ditch | groove formed in the lower surface of a horizontal member. FIG.8 (b) is a front view of the inclined surface formed in the horizontal member, and FIG.8 (c) is XX sectional drawing in FIG.8 (b). 8A, 8B, and 8C, the state of the horizontal member that is shaken by the earthquake is indicated by a solid line for the first shake (detection point B), and a shake on the opposite side is indicated by a broken line (detection point B ′). . The laser light emitted from the laser displacement meter 7 installed at the reference point A is first irradiated to the detection point B on the inclined surface 6 as shown in FIGS. When the detection point B is irradiated on the inclined surface 6 and irradiates the inclined surface 6 again after passing through the second inclined surface 15, the horizontal direction in the inclination direction of the second inclined surface 15 is the same as in the first embodiment. displacement _{X 1} can be calculated. Further, since the building structure is moved by the earthquake, the detection point B moves to the detection point B ′ by the first shake as shown in FIG. Laser light of the laser displacement gauge 7 scans the inclined surface 6 at an inclination angle theta _3. As shown in FIGS. 8B and 8C, when the laser beam is irradiated onto the inclined surface 6 and then irradiated onto the second inclined surface 15, the orbit of the laser light on the inclined surface 6 is obtained. was detected mainly entire waveform, the horizontal displacement of the horizontal displacement amount X ₁ of by causing the detection result to the building structure 1 the orthogonal distance from the main axis the trajectory of the laser beam as a slave on the second inclined surface 15 A two-dimensional horizontal displacement amount that is X ₂ can be detected. Since the second inclined surface 15 is disposed at a predetermined distance from the origin, in the case of a small-scale earthquake, the displacement is small and the trajectory of the laser beam does not cross the second inclined surface 15. However, there is no problem because it does not affect the building diagnosis.

  Next, based on the one-dimensional horizontal displacement amount or the two-dimensional horizontal displacement amount, a diagnosis process for the degree of damage received by the building structure 1 is performed. The client personal computer 11a in the building structure 1 continuously monitors either the one-dimensional horizontal displacement amount or the two-dimensional horizontal displacement amount, while checking whether there is earthquake occurrence data at a certain interval (for example, 10 minutes). When the observation data is obtained, the data is acquired and then recorded in the client personal computer 11a in the building structure 1 and also connected to the recorder 8 and recorded in the memory 16 of the recorder 8. Receive displacement data.

Horizontal displacement X _{2 is} specifically calculated by the equation 2 below.

X ₂ = Y ₂ / tan θ ₂ (Formula 2)
Here, X _{2 represents} the horizontal displacement amount of the second inclined surface 15, θ ₂ represents the inclination angle of the second inclined surface 15, and Y ₂ represents the vertical displacement amount of the second inclined surface 15.

  Since the twist is caused by the deviation of the center of gravity and the rigid center in the plan view of the building structure 1, the entire building does not shake uniformly and a twist phenomenon occurs. When such a torsion phenomenon works greatly, that is, when the deviation between the center of gravity and the rigid center is large, the displacement increases on the outer wall side and the risk of damage increases. For this reason, it is necessary to diagnose the degree of damage near the center and near the outer wall, at a plurality of locations. Actually, the property of each individual building is evaluated at the time of building design, and it is selected whether to install the building diagnosis system in one place where the displacement is predicted to increase or to install the building diagnosis system in a plurality of places.

In order to detect the displacement of the building structure 1 damaged by the external force from the side without excess or deficiency, install a plurality of displacement measurement systems with the inclination directions of the inclined surfaces 6 orthogonal to two or more orthogonal positions. Is preferred. By installing in this way, the detection trajectory of the laser beam can be decomposed into two orthogonal directions, and the inclination angle θ _{1 of the} inclined surface 6 is determined from the displacement amounts Y _{1 and} Y _{2 of} each laser beam in the vertical direction. , Θ ₂ , the horizontal displacement amount can be obtained by detecting the displacement amounts X ₁ and X ₂ in the longitudinal direction of the horizontal member. Although the cost is high, installing a plurality of building diagnosis systems in this way makes it possible to perform strict building diagnosis as compared with the case where one building diagnosis system is installed.

When building diagnostic systems are installed at a plurality of locations on the building structure 1, the laser displacement meter 7 determines the individual wall layout of the building structure 1, the center of gravity of the building structure 1, the rigid position of the building structure 1, etc. A planar installation position is determined in consideration of shaking and twisting. However, the variation of such displacement, measured observed displacement data X ₀ and displacement characteristic value Xe is the first time problems when in close proximity. If the earthquake has a seismic intensity of about 6, there is no problem in diagnosis with a representative value at one location near the center of the building structure 1.

  Next, the client personal computer 11a continuously monitors either the one-dimensional horizontal displacement amount or the two-dimensional horizontal displacement amount as described above, and compares the displacement data of the building structure 1 with the building structure 1 Diagnose the extent of damage caused by earthquakes. Specifically, the displacement characteristic value Xe prepared in advance is compared with the displacement D at the time of the actual earthquake, and it is determined that there is no damage if Xe ≧ D and that there is damage if Xe <D. This determination is based on the idea that if building maintenance is appropriate and the magnitude of repeated earthquakes is small, the earthquake resistance of the building will not change over time. For example, if the sign of the above judgment formula is reversed in a single earthquake, it is determined that the building is damaged only by the earthquake. On the other hand, when the earthquake is repeated a plurality of times and the relationship between Xe and D is gradually reversed, it is determined that the potential earthquake resistance has been lowered due to deterioration over time.

  Further, although it is feared that it is rare that the second inclined surface 15 is irradiated with laser light, the horizontal distance between the detection point B and the second inclined surface 15 is set sufficiently small with respect to the amplitude of the earthquake. Then, in most earthquakes, the detection trajectory of laser light crosses the second inclined surface 15 and irradiates the detection point C of the second inclined surface 15. In addition, it is feared that the groove width is too narrow to be detected, but the laser displacement meter sampling period (0.02-0.04 seconds) relative to the earthquake period (0.5-1.0 seconds) Therefore, it can be detected by setting the groove width of the sampling period of the laser displacement meter.

  In the above description, the displacement caused by the external load due to the earthquake has been described. However, the same can be obtained for the external load due to the wind pressure. Further, when a predetermined number of days have passed, specifically, the laser displacement meter 7 is started together with the recorder 8 by inputting a periodic diagnosis period to the client personal computer 11a from an input means (not shown), and only during an earthquake. Instead, the deterioration diagnosis is performed periodically at the input cycle. Or when a user wants to know the state of the building structure 1 arbitrarily, it can obtain | require similarly. However, if it is not externally added by an earthquake, earthquake observation data is not required.

  The laser displacement meter 7, the inclined surface 6, the second inclined surface 15, etc., which are the components of the building diagnostic system shown in the embodiment, are merely preferred examples, and in implementation, these components are claimed. It goes without saying that changes, modifications, etc. can be made as appropriate within the range described in the range. FIG. 9 is a perspective view showing a strip-shaped plate material 18 which is a modified example of the second inclined surface. The second inclined surface 15 of this modified example is formed by the bottom surface of the strip-shaped plate material 18 suspended by two strings or rod members having different lengths at a substantially intermediate portion in the inclination direction of the inclined surface 6. As the lengths of the two strings or rod members, the length by which the strip-shaped plate material 18 is inclined at a predetermined angle is selected.

It is a front view which shows the whole structure of the building structure in which the building diagnostic system which concerns on 1st Embodiment of this invention was installed. It is a front view which shows before and after the earthquake of a building structure same as the above. It is the schematic which shows a mode that a housing maker processes the displacement information of a building structure. It is a graph which shows the correlation of an earthquake attribute and a building attribute. It is a graph in which time is plotted on the horizontal axis and angle information and displacement information are plotted on the vertical axis. It is a front view which shows before and after the earthquake of the building structure which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the detail of the inclined surface and the 2nd inclined surface where the laser beam is irradiated. It is a perspective view which shows the detail of the 2nd inclined surface where the laser beam is irradiated. 8A is a plan view from the bottom of the groove, FIG. 8B is a front view showing before and after the earthquake of the inclined surface formed on the horizontal member, and FIG. 8C is FIG. 8B. It is XX sectional drawing in. It is a perspective view which shows the modification of the 2nd inclined surface which concerns on 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building structure 2 Foundation 3 Base 4 Column 5 Horizontal member 6 Inclined surface 7 Laser displacement meter 8 Recorder 11a, 11b Client personal computer 12 Database 13 Server 14 Lower horizontal member 15 Second inclined surface 16 Memory 17 CPU
18 Strip-shaped plate A A Reference point B, B 'Detection point C, C' Second detection point X ₀ Observation displacement data t Time from laser beam emission start to light reception v Laser beam speed l From reference point A to detection point B distance Xe displacement characteristic values X _{1, X 2} horizontal displacement _Y 1, _{Y 2} vertical displacement θ _1, θ ₂ tilt angle

Claims (6)

  A reference point is provided at any part of the building structure, and a detection point is provided on an inclined surface facing this reference point in the vertical direction across the space. The detection point is detected from the reference point when an external load such as an earthquake or wind pressure occurs. Detecting and accumulating the distance up to and diagnosing the degree of damage by obtaining the one-dimensional horizontal displacement amount, which is the horizontal displacement amount of the building structure, from the difference between the same two-point distance before the external load occurs A building diagnostic system characterized by   A laser displacement meter is installed at the reference point, and the inclined surface on which the detection point is arranged is formed on the bottom surface of the horizontal groove of the building structure or on the bottom surface of the groove formed on the bottom surface of the member that exhibits integral behavior The laser light emitted from the light source of the laser displacement meter is formed on the bottom surface of the concave groove, and the laser light from the laser displacement meter is reflected from the bottom surface of the concave groove and irradiated to the light source to detect from the reference point. The building diagnosis system according to claim 1, wherein a distance to the point is detected.   A second inclined surface orthogonal to the other side from the one side to the other side is formed above the inclined surface, and a second detection point is provided on the second inclined surface. The building diagnostic system according to claim 1 or 2, wherein a two-dimensional horizontal displacement amount of the building structure on the second inclined surface is obtained by detecting a distance to the two detection points.   Either one-dimensional horizontal displacement or two-dimensional horizontal displacement is recorded while continuously monitored, and the building structure is diagnosed for earthquake damage by comparison with the displacement characteristic value during earthquake. The building diagnostic system according to claim 3.   Either one-dimensional horizontal displacement or two-dimensional horizontal displacement is recorded while continuously monitored and compared with the observation data of the building structure at the construction site to determine whether the building structure is damaged by an earthquake. The building diagnostic system according to claim 3 to be diagnosed.   6. The building diagnosis system according to claim 4 or 5, comprising diagnostic means for diagnosing the degree of damage to the building and a personal computer for displaying the diagnosis result.

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