CN113340549A - A evaluation device for buckling restrained brace construction effect - Google Patents
A evaluation device for buckling restrained brace construction effect Download PDFInfo
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- CN113340549A CN113340549A CN202110646106.9A CN202110646106A CN113340549A CN 113340549 A CN113340549 A CN 113340549A CN 202110646106 A CN202110646106 A CN 202110646106A CN 113340549 A CN113340549 A CN 113340549A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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Abstract
The invention provides an evaluation device for construction effect of a buckling restrained brace, which adopts a monitoring box, a first laser probe, a second laser probe, a third laser probe, a telescopic mechanism, a support seat, an axis centering plate, a height measuring target plate and a vertical temporary target plate, wherein the axis centering plate and the second laser probe are respectively arranged on the support seat, the laser direction of the second laser probe is parallel to the axis centering plate, the laser direction of the second laser probe is perpendicular to the laser direction of the first laser probe and is shot to a first upright post, the axial centering plate can be ensured to be attached to the outer surface of the buckling restrained brace by adjusting the length of the telescopic mechanism and the rotation of the support seat around a temporary fixing bolt, and whether the prepared buckling restrained brace is positioned in the same vertical plane with the central axis of two side posts of a building or not and has large deviation can be timely, quickly and accurately judged by combining the data measured by the first, second and third laser probes Is small.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to an evaluation device for the construction effect of a buckling restrained brace.
Background
In recent years, in high-rise buildings, especially in high-rise frame buildings or steel structure buildings, Buckling Restrained Braces (BRB) are widely used, and play a significant role in building shock absorption. BRBs are generally composed of a stem, a peripheral constraint, and an inner sliding layer, wherein the stem is generally made of a high-ductility, low-yield-limit material, the peripheral constraint is generally made of a steel material with a relatively high stiffness, and a sliding material or an air layer with a relatively small gap is used as a partition between the stem and the peripheral constraint, so that the inner stem can be deformed laterally under the poisson effect and can be stretched and compressed longitudinally along the stem under the axial force. The core column is a high-energy-consumption component in the seismic mitigation of the building, and the peripheral constraint provides anti-pressure buckling constraint for the core column, so that the core column is elastically deformed (small earthquake) or elastically and plastically deformed (medium earthquake and large earthquake) under the condition that the BRB is subjected to the horizontal force effect of the earthquake, and therefore a large amount of seismic energy is safely consumed for the building structure, and the safety of the structure under the action of the earthquake is ensured. And because the BRB is convenient to replace, the BRB is convenient to maintain and replace after being damaged due to earthquake. The BRB entity is shown in fig. 1 below.
During BRB construction, three key factors that affect its later use effect are: whether the central axis of the BRB core column is consistent with the central axes of two side columns of a building or not is ensured, and the force under the action of earthquake load can be effectively transmitted to the core column in an axial force mode to realize shock absorption, and the problem is mainly solved by a simple construction measure at present; 2. whether the welding seam/bolt connection of the rigid nodes at two sides fixed with the structure is reliable or not needs to be determined in an ultrasonic welding seam detection mode; and 3, after the BRB is installed, whether an installation internal force influencing the energy consumption of the core column exists or not is judged, and the energy consumption range of the BRB is reduced. For the latter first problem, no clear solution exists at present.
Disclosure of Invention
The invention aims to provide an evaluation device for the construction effect of a buckling restrained brace, which solves the problem that whether the mounting position of the buckling restrained brace is qualified or not is difficult and inaccurate, can timely, quickly and accurately judge whether the central axis of the prepared buckling restrained brace is in the same vertical plane with the central axes of two side columns of a building or not and the deviation, ensures that the force under the action of earthquake load can be effectively transmitted to a core column in an axial force mode to realize shock absorption, and provides a brace for achieving the maximum expected action of a BRB after the BRB is mounted.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides an evaluation device for buckling restrained brace construction effect, buckling restrained brace's upper end is fixed in on the first stand through first otic placode, and the lower extreme is fixed in on the second stand through the second otic placode, include: the monitoring device comprises a monitoring box, a first laser probe, a second laser probe, a third laser probe, a telescopic mechanism, a supporting seat, an axis centering plate, a height measuring target plate and a vertical temporary target plate, wherein the axis centering plate and the second laser probe are respectively arranged on the supporting seat, the laser direction of the second laser probe is parallel to the axis centering plate and is shot to a first lug plate, the axis centering plate is attached to the outer surface of the buckling restrained brace through the telescopic mechanism, the lower end of the telescopic mechanism is fixedly connected with the monitoring box, the upper end of the telescopic mechanism is connected with the supporting seat through a temporary fixing bolt and a nut, when the nut is loosened, the supporting seat can rotate around the temporary fixing bolt, when the nut is tightened, the supporting seat is fixedly connected with the telescopic mechanism, the height measuring target plate is arranged at the upper part of the telescopic mechanism and is vertical to the axial direction of the telescopic mechanism, the monitoring box is provided with a central processing unit and a display, the central processing unit is in signal connection with the first laser probe, the second laser probe and the third laser probe respectively, and the axial lead of the temporary fixing bolt is located in a plane where the laser of the first laser probe is located.
Preferably, in the above evaluation apparatus for the construction effect of the buckling restrained brace, the central processing unit calculates the installation deviation θ between the plane of the axis of the buckling restrained brace and the plane of the axes of the first upright and the second upright by using a first formula, where θ ═ L (L2 ″ -L2)/L1|, where L2 is the horizontal distance from the axis of the temporary fixing bolt to the vertical temporary target plate, L2 ═ L2 '+ a, L2' is the distance from the first laser probe to the projection point of the vertical temporary target plate, a is the horizontal distance from the first laser probe to the axis of the temporary fixing bolt, L2 "is a theoretical distance obtained according to a second formula, and L2 ″ -sqrt (L1^2- (H2-H1) ^2), that is to say, the second formula is
H2 is the distance from the projection point of the second laser probe to the first ear plate to the ground, H1 is the distance from the shaft center line of the temporary fixing screw to the ground, H1 is b + H1 '+ c, H1' is the distance from the third laser probe to the height measurement target plate, b is the distance from the third laser probe to the ground, c is the height direction distance from the third laser probe to the shaft center line of the temporary fixing bolt, L1 is the distance from the shaft center line of the temporary fixing bolt to the first ear plate along the laser direction of the second laser probe, L1 is L1 '+ d, L1' is the distance from the second laser probe to the first ear plate, d is the distance from the shaft center line of the second laser probe to the temporary fixing bolt along the laser direction of itself.
Preferably, in the above evaluation device for the construction effect of the anti-buckling restrained brace, a bias threshold value theta max is set in the central processing unit, if theta is greater than theta max, an alarm is given, and the anti-buckling restrained brace is reinstalled until theta is less than or equal to theta max.
Preferably, in the above evaluation apparatus for the buckling restrained brace construction effect, the number of the telescopic mechanisms is two, the two telescopic mechanisms are respectively arranged on two sides of the mounting seat, through holes for the threaded portions of the temporary fixing bolts to pass through are correspondingly formed in the telescopic mechanisms and the mounting seat, and the threaded portions of the temporary fixing bolts sequentially pass through the through hole of one telescopic mechanism, the through hole of the mounting seat and the through hole of the other telescopic mechanism and are fixed by nuts.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the telescopic mechanism is a manual telescopic rod, and the manual telescopic rod comprises two matched threaded sleeves.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the telescopic mechanism is an electric telescopic rod.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the telescopic mechanism is a hydraulic telescopic rod.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the first column and the second column are connected by a cross beam.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the monitoring box is further provided with a display, and the central processing unit is in signal connection with the display.
Preferably, in the above evaluation apparatus for the construction effect of the buckling restrained brace, the laser direction of the second laser probe is parallel to the axis centering plate and is emitted to the lower bottom surface of the first ear plate, and the lower bottom surface of the first ear plate is horizontally arranged.
According to the technical scheme disclosed above, compared with the prior art, the invention has the following beneficial effects:
the invention provides an evaluation device for the construction effect of a buckling restrained brace, wherein the upper end of the buckling restrained brace is fixed on a first upright post through a first lug plate, and the lower end of the buckling restrained brace is fixed on a second upright post through a second lug plate, and the evaluation device comprises: the device comprises a monitoring box, a first laser probe, a second laser probe, a third laser probe, a telescopic mechanism, a supporting seat, an axis centering plate, a height measuring target plate and a vertical temporary target plate, wherein the axis centering plate and the second laser probe are respectively arranged on the supporting seat, the laser direction of the second laser probe is parallel to the axis centering plate and is shot to a first lug plate, the lower end of the telescopic mechanism is fixedly connected with the monitoring box, the upper end of the telescopic mechanism is connected with the supporting seat through a temporary fixing bolt and a nut, the supporting seat can rotate around the temporary fixing bolt when the nut is loosened, the supporting seat is fixedly connected with the telescopic mechanism when the nut is screwed, the height measuring target plate is arranged at the upper part of the telescopic mechanism and is vertical to the axial direction of the telescopic mechanism, and the first laser probe and the second laser probe are respectively arranged on the monitoring box, the laser direction of the third laser probe is parallel to the telescopic direction of the telescopic mechanism, the laser direction of the second laser probe is perpendicular to the laser direction of the first laser probe and is shot to the first upright post, the vertical temporary target plate is arranged on the outer side of the first upright post, so that the connecting line of the projection point of the first laser probe to the vertical temporary target plate and the projection point of the second laser probe to the first ear plate is parallel to the first upright post, the monitoring box is provided with a central processing unit and a display, the central processing unit is respectively in signal connection with the first laser probe, the second laser probe and the third laser probe, the axial lead of the temporary fixing bolt is positioned in the plane where the laser of the first laser probe is positioned, and the axial lead of the centering plate can be ensured to be attached to the outer surface of the anti-buckling constraint support by adjusting the length of the telescopic mechanism and the rotation of the support seat around the temporary fixing bolt, and then guarantee that the laser direction of second laser probe is parallel with the axial lead of buckling restrained brace, thereby can make the distance of the laser direction measurement of second laser probe can represent the local length of buckling restrained brace, combine the data that first laser probe and third laser probe measured, can in time, fast, accurately judge whether the buckling restrained brace axis of preparing is in same vertical plane and deviation size with the axis of building both sides post, guarantee that the earthquake load effect down-force can effectively be transmitted to the stem with the mode of axial force and realize the shock attenuation, can reach the biggest expectation effect after the installation for the BRB and provide the support.
Drawings
FIG. 1 is a schematic view of an anti-buckling restrained brace.
FIG. 2 is a schematic structural diagram of an evaluation device for the construction effect of the buckling restrained brace according to the invention.
FIG. 3 is a second schematic structural diagram of the apparatus for evaluating the construction effect of the buckling restrained brace according to the present invention.
FIG. 4 is a third schematic structural diagram of the evaluation device for the construction effect of the buckling restrained brace of the present invention.
Fig. 5 is a schematic diagram of the principle of the present invention.
In the figure: the system comprises a 1-buckling-restrained brace, a 2-first lug plate, a 3-first upright post, a 4-second lug plate, a 5-second upright post, a 6-monitoring box, a 7-first laser probe, a 8-second laser probe, a 9-third laser probe, a 10-telescopic mechanism, a 11-supporting seat, a 12-axis centering plate, a 13-height measurement target plate, a 14-vertical temporary target plate-15-display, a 16-temporary fixing bolt, a 17-cross beam, a 18-projection point of the vertical temporary target plate shot by the first laser probe, a 19-projection point of the first lug plate shot by the second laser probe and a 20-ground.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. The technical contents and features of the present invention will be described in detail below with reference to the embodiments illustrated in the accompanying drawings. It is further noted that the drawings are in greatly simplified form and are not to precise scale, merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
Referring to fig. 1 to 5, the present embodiment discloses an evaluation device, i.e. a detection device, for the construction effect of a buckling restrained brace, wherein the upper end of the buckling restrained brace 1 is fixed on a first upright post 3 through a first ear plate 2, and the lower end is fixed on a second upright post 5 through a second ear plate 4, and the evaluation device includes: the device comprises a monitoring box 6, a first laser probe 7, a second laser probe 8, a third laser probe 9, a telescopic mechanism 10, a supporting seat 11, an axis centering plate 12, a height measuring target plate 13 and a vertical temporary target plate 14, wherein the axis centering plate 12 and the second laser probe 8 are respectively installed on the supporting seat 11, the laser direction of the second laser probe 8 is parallel to the axis centering plate 12 and is shot to the first ear plate 2, the axis centering plate 12 is stuck to the outer surface of the buckling restrained brace 1 through the telescopic mechanism 10, the lower end of the telescopic mechanism 10 is fixedly connected with the monitoring box 6, the upper end of the telescopic mechanism 10 is connected with the supporting seat 11 through a temporary fixing bolt 16 and a nut (not shown), when the nut is loosened, the supporting seat 11 can rotate around the temporary fixing bolt 16, when the nut is tightened, the supporting seat 11 is fixedly connected with the telescopic mechanism 10, the height measuring target plate 13 is mounted on the upper portion of the telescopic mechanism 10 and is perpendicular to the axial direction of the telescopic mechanism 10, the first laser probe 7 and the second laser probe 8 are respectively mounted on the monitoring box 6, the laser direction of the third laser probe 9 is parallel to the telescopic direction of the telescopic mechanism 10, the laser direction of the second laser probe 8 is perpendicular to the laser direction of the first laser probe 7 and is shot to the first upright post 3, the vertical temporary target plate 14 is arranged on the outer side of the first upright post 3, so that a connecting line of a projection point 18 of the first laser probe 7 to the vertical temporary target plate 14 and a projection point 19 of the second laser probe 8 to the first ear plate 2 is parallel to the first upright post 3, the monitoring box 6 is provided with a central processing unit (not shown) and a display 15, the central processing unit is respectively in signal connection with the first laser probe 7, the second laser probe 8 and the third laser probe 9, the axial lead of the temporary fixing bolt 16 is positioned in the plane of the laser of the first laser probe 7, the length of the telescopic mechanism 10 and the rotation of the supporting seat 11 around the temporary fixing bolt 16 can be adjusted to ensure that the axial centering plate 12 is attached to the outer surface of the buckling restrained brace 1, and further ensure that the laser direction of the second laser probe 8 is parallel to the axial lead of the buckling restrained brace 1, so that the distance measured in the laser direction of the second laser probe 8 can represent the local length of the buckling restrained brace 1, and by combining the data measured by the first laser probe 7 and the third laser probe 9, whether the prepared central axis of the buckling restrained brace 1 and the central axes of the two side columns of the building, namely the central axes of the first upright post 3 and the second upright post 5, namely the axial leads, are positioned in the same vertical plane and have deviation, and the force under the action of the earthquake load can be effectively transmitted to the core column in the axial force manner to realize shock absorption, provides support for the BRB to achieve the maximum desired effect after installation.
Preferably, in the above-mentioned evaluation apparatus for the construction effect of the buckling-restrained brace, the central processing unit calculates the installation deviation θ between the plane of the axis of the buckling-restrained brace 1 and the planes of the axes of the first upright 3 and the second upright 5 by a formula one, where the formula is θ | (L2 ″ -L2)/L1|, where L2 is the horizontal direction distance from the axis of the temporary fixing bolt 16 to the vertical temporary target plate 14, L2 ═ L2 '+ a, L2' is the distance from the first laser probe 7 to the projection point of the vertical temporary target plate 14, a is the horizontal direction distance from the axis of the first laser probe 7 to the axis of the temporary fixing bolt 16, L2 "is the theoretical distance obtained according to a formula two, the formula two is L2 ″ -sqrt (L1^2- (H2-H1) ^2), H2 is the projection point from the second laser probe 19 to the ground surface 20, h1 is the distance from the shaft axis of the temporary fixing screw to the ground, H1 is b + H1 '+ c, H1' is the distance from the third laser probe 9 to the height measurement target plate 13, b is the distance from the third laser probe 9 to the ground, c is the height direction distance from the third laser probe 9 to the shaft axis of the temporary fixing bolt 16, L1 is the distance from the shaft axis of the temporary fixing bolt 16 to the first ear plate 2 along the laser direction of the second laser probe 8, L1 is L1 '+ d, L1' is the distance from the second laser probe 8 to the first ear plate 2, d is the distance from the shaft axis of the second laser probe 8 to the temporary fixing bolt along the laser direction itself, and monitoring of the installation deviation θ between the plane where the shaft axis of the buckling restrained brace 1 is located and the planes where the shaft axes of the first upright 3 and the second upright 5 can be realized by the central processing unit through the above formula, the complexity of manual measurement is avoided, and the accuracy and timeliness of measurement are improved.
The principle of the invention is as follows: in an ideal state, the axes of the BRB core column are in the same plane with the axes of the two side columns, so that the horizontal force transmitted by the two side columns is directly transmitted to the BRB core column, and the energy consumption in the ideal state is realized. That is, in an ideal state, the stem axis and the stem axis are located in the same plane. However, in practice, due to the limitations of the mounting process, the axis of the BRB stem may deviate from the plane of the stem axis, resulting in a BRB stem that is in fact eccentrically stressed, and this deviation may be referred to as the degree of deviation of the BRB stem. After the BRB is mounted, the deviation needs to be detected as an index for mounting acceptance. Due to the principle that two lines form a plane, the number of the planes involved in the invention is 2, wherein one plane is a plane formed by central axes of two side columns, and the other plane is a plane formed by a laser line of the second laser probe 8 and a laser line of the first laser probe 7. L1, H2, H1 and L2 form a trapezoid, and if the trapezoid is in the same plane, the law of a right-angle trapezoid is satisfied, and if the trapezoid is not in the same plane, the law of the right-angle trapezoid cannot be satisfied. The deviation index is also called the mounting deviation θ, and is derived from this principle.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the bias threshold value theta max is set in the central processing unit, if theta is greater than theta max, an alarm is given, and the buckling restrained brace 1 is reinstalled until theta is less than or equal to theta max. If theta is larger than theta max, the deviation between the installation plane where the axis of the buckling restrained brace 1 is located and the plane where the axis of the first upright post 3 and the second upright post 5 are located is too large, and the earthquake load acting force is influenced to be effectively transmitted to the core column of the buckling restrained brace 1 in the mode of axial force to achieve shock absorption.
In order to stably and effectively support the buckling restrained brace 1 by the axial centering plate 12 and enable the stress between the buckling restrained brace and the buckling restrained brace to be more applied, preferably, in the assessment device for the buckling restrained brace construction effect, the number of the telescopic mechanisms 10 is two, the two telescopic mechanisms are respectively arranged on two sides of the mounting seat, through holes for the threaded parts of the temporary fixing bolts to pass through are correspondingly formed in the telescopic mechanisms 10 and the mounting seat, and the threaded parts of the temporary fixing bolts sequentially pass through the through holes of one telescopic mechanism 10, the through holes of the mounting seat and the through holes of the other telescopic mechanism 10 and are fixed through nuts.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the laser direction of the second laser probe 8 is parallel to the axis centering plate 12 and is emitted to the lower bottom surface of the first ear plate 2, and the lower bottom surface of the first ear plate 2 is horizontally arranged, so that the measurement of the distance H2 can be facilitated.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the telescopic mechanism 10 is a manual telescopic rod, and the manual telescopic rod comprises two matched threaded sleeves, so that the cost is low and the use is convenient.
Of course, the telescopic mechanism 10 is an electric telescopic rod or a hydraulic telescopic rod, so that the use is more convenient, and the measurement efficiency is improved.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the first upright 3 and the second upright 5 are connected by the cross beam 17.
Preferably, in the above evaluation device for the construction effect of the buckling restrained brace, the monitoring box 6 is further provided with a display 15, the central processing unit is in signal connection with the display 15, and the display 15 can display the magnitude of the installation deviation θ between the plane where the axis of the buckling restrained brace 1 is located and the plane where the axis of the first upright post 3 and the second upright post 5 are located and alarm information.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (8)
1. The utility model provides an evaluation device for buckling restrained brace construction effect, buckling restrained brace's upper end is fixed in on the first stand through first otic placode, and the lower extreme is fixed in on the second stand through the second otic placode, its characterized in that includes: the monitoring device comprises a monitoring box, a first laser probe, a second laser probe, a third laser probe, a telescopic mechanism, a supporting seat, an axis centering plate, a height measuring target plate and a vertical temporary target plate, wherein the axis centering plate and the second laser probe are respectively arranged on the supporting seat, the laser direction of the second laser probe is parallel to the axis centering plate and is shot to a first lug plate, the axis centering plate is attached to the outer surface of the buckling restrained brace through the telescopic mechanism, the lower end of the telescopic mechanism is fixedly connected with the monitoring box, the upper end of the telescopic mechanism is connected with the supporting seat through a temporary fixing bolt and a nut, when the nut is loosened, the supporting seat can rotate around the temporary fixing bolt, when the nut is tightened, the supporting seat is fixedly connected with the telescopic mechanism, the height measuring target plate is arranged at the upper part of the telescopic mechanism and is vertical to the axial direction of the telescopic mechanism, the monitoring box is provided with a central processing unit and a display, the central processing unit is in signal connection with the first laser probe, the second laser probe and the third laser probe respectively, and the axial lead of the temporary fixing bolt is located in a plane where the laser of the first laser probe is located.
2. The apparatus for evaluating the construction effect of the buckling-restrained brace as claimed in claim 1, wherein the central processing unit calculates the installation deviation θ between the plane of the axis of the buckling-restrained brace and the planes of the axes of the first and second columns by a formula one, where the formula is θ | (L2 "-L2)/L1 |, where L2 is the horizontal direction distance from the axis of the temporary fixing bolt to the vertical temporary target plate, L2 ═ L2 '+ a, L2' is the distance from the first laser probe to the projection point of the vertical temporary target plate, a is the horizontal direction distance from the axis of the first laser probe to the axis of the temporary fixing bolt, L2" is a theoretical distance obtained according to a formula two, the formula L2 "═ sqrt (L1^2- (H2-H1) ^2), and H2 is the projection point from the second laser probe to the first ear plate to the ground, h1 is the distance from the shaft axis of the temporary fixing screw to the ground, H1 is b + H1 '+ c, H1' is the distance from the third laser probe to the height measurement target plate, b is the distance from the third laser probe to the ground, c is the height direction distance from the third laser probe to the shaft axis of the temporary fixing bolt, L1 is the distance from the shaft axis of the temporary fixing bolt to the first ear plate along the laser direction of the second laser probe, L1 is L1 '+ d, L1' is the distance from the second laser probe to the first ear plate, and d is the distance from the shaft axis of the second laser probe to the temporary fixing bolt along the laser direction of itself.
3. The apparatus for evaluating the construction effectiveness of the buckling-restrained brace as recited in claim 2, wherein a deviation threshold value θ max is set in the central processing unit, if θ > θ max, an alarm is given, and the buckling-restrained brace is reinstalled until θ ≦ θ max.
4. The apparatus according to claim 1, wherein the number of the telescopic mechanisms is two, the telescopic mechanisms are respectively disposed on two sides of the mounting base, the telescopic mechanisms and the mounting base are correspondingly provided with through holes for a threaded portion of a temporary fixing bolt to pass through, and the threaded portion of the temporary fixing bolt passes through the through hole of one telescopic mechanism, the through hole of the mounting base and the through hole of the other telescopic mechanism in sequence and is fixed by a nut.
5. The apparatus for evaluating the construction effect of a buckling restrained brace as recited in claim 1, wherein the telescoping mechanism is a manually telescoping rod comprising two matching threaded sleeves.
6. The apparatus for evaluating the construction effectiveness of a buckling restrained brace as recited in claim 1, wherein the telescoping mechanism is an electric telescopic rod or a hydraulic telescopic rod.
7. The apparatus for evaluating the construction effect of the buckling-restrained brace as recited in claim 1, wherein the laser direction of the second laser probe is parallel to the axis-centering plate and is directed to the lower bottom surface of the first lug plate, and the lower bottom surface of the first lug plate is horizontally disposed.
8. The apparatus for evaluating the construction effectiveness of the buckling-restrained brace as recited in claim 1, wherein the monitoring box is further provided with a display, and the central processing unit is in signal connection with the display.
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| CN202110646106.9A CN113340549B (en) | 2021-06-10 | 2021-06-10 | A evaluation device for buckling restrained brace construction effect |
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| CN202110646106.9A CN113340549B (en) | 2021-06-10 | 2021-06-10 | A evaluation device for buckling restrained brace construction effect |
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| CN113340549B CN113340549B (en) | 2022-12-06 |
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