CN114413828B - Structural deformation monitoring method for light steel structure assembly type building - Google Patents
Structural deformation monitoring method for light steel structure assembly type building Download PDFInfo
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- CN114413828B CN114413828B CN202210072909.2A CN202210072909A CN114413828B CN 114413828 B CN114413828 B CN 114413828B CN 202210072909 A CN202210072909 A CN 202210072909A CN 114413828 B CN114413828 B CN 114413828B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 39
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 238000005452 bending Methods 0.000 claims description 28
- 238000010276 construction Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a structural deformation monitoring method of a light steel structure assembly type building, which comprises the following steps: step one, acquiring displacement of a wall frame column, displacement of a wall frame beam and displacement of a connecting node as deformation data according to a sampling period; step two, obtaining a real-time deformation value of the light steel structure assembly building according to the acquired adjacent two deformation data, and obtaining a fracture coefficient; step three, obtaining a fracture scoring value according to the fracture coefficient; step four, if Y is less than 5, the first-stage deformation is performed; if Y is more than or equal to 5 and less than 7, the second-stage deformation is performed; if Y is more than or equal to 7, three-stage deformation is performed. The invention judges whether the deformation of the structure and the grade of the deformation occur according to the deformation data of the light steel structure assembly type building, and has the characteristic of improving the accuracy of structure monitoring.
Description
Technical Field
The invention relates to the technical field of fabricated buildings, in particular to a structural deformation monitoring method of a light steel structure fabricated building.
Background
The assembled building is a building assembled by prefabricated components produced by factories on a construction site, generally adopts standardized design, industrialized production and assembled construction, and is a novel building production mode capable of realizing sustainable development of energy conservation, environmental protection and full life cycle value maximization of building industry.
The fabricated building is mainly divided into a prefabricated concrete structure fabricated building, a steel structure fabricated building and a wood structure fabricated building, wherein the steel structure fabricated building can be divided into three sub-industries of a light steel structure fabricated building, a multi-story high-rise steel structure fabricated building and a space steel structure fabricated building.
Compared with the prefabricated concrete structure assembled building, the light steel structure assembled building has smaller component size and can obtain larger use space; the wood structure assembled building has higher cost and does not meet the building development requirement of China.
At present, the country is greatly advancing new rural construction, light steel structure assembled building is the first choice of novel house construction because of the energy-conservation that it has, environmental protection, basis cost low grade advantage, be mostly 1-3 low-rise building in light steel structure assembled building, but in current demand, low-rise building is gradually unable to satisfy people's needs, and in light steel structure farming room construction, at present mostly use the thin-walled cold-formed light steel structure as the major structure, but thin-walled cold-formed light steel fossil fragments are open structure, thickness is about 0.8 millimeter generally, there is corrosion resistance relatively poor, the durability is poor after the corruption, middle filling layer light slurry intensity is not high grade defect, more probably cause bending deformation or local fracture of steel structure, consequently, in the construction process of light steel structure assembled building, it is highly desirable to develop a method that can monitor the structural deformation of light steel structure assembled building.
Disclosure of Invention
The invention aims to design and develop a structural deformation monitoring method of a light steel structure assembled building, and the structural deformation is rated by acquiring fracture scoring values through monitoring a plurality of deformation data and using fracture coefficients, so that the structural deformation monitoring accuracy is realized, and the accuracy is improved.
The technical scheme provided by the invention is as follows:
a structural deformation monitoring method of a light steel structure assembly type building comprises the following steps:
step one, acquiring displacement of a wall frame column, displacement of a wall frame beam and displacement of a connecting node as deformation data according to a sampling period;
step two, obtaining a real-time deformation value of the light steel structure assembly type building according to the collected two adjacent deformation data, and obtaining a fracture coefficient:
wherein ζ is the fracture coefficient, F x X is the ultimate bearing capacity of the connecting node x For the displacement of the connecting node, M x To carry bending moment to the limit of the connecting node, F i Is the ultimate bearing capacity of the wall frame column, X i For the displacement of the wall-frame column, M i For ultimate bearing bending moment of wall frame column, F j Is the ultimate bearing capacity of the wall frame beam, X j For the displacement of the wall frame beam M j For the ultimate bearing bending moment of the wall frame beam, K is the rotational rigidity of the connecting node, I o To reduce the coefficient of transverse rigidity of the connecting node, I p For the longitudinal rigidity reduction coefficient of the connecting node, D o To connect the lateral lengths of the nodes, D p Is the longitudinal length of the connection node;
step three, obtaining a fracture scoring value according to the fracture coefficient:
Y＝ξ×N；
wherein Y is a fracture score, ζ is a fracture coefficient, and N is a deformation score;
step four, if Y is less than 5, the first-stage deformation is performed;
if Y is more than or equal to 5 and less than 7, the second-stage deformation is performed;
if Y is more than or equal to 7, three-stage deformation is performed.
Preferably, the step one further includes:
and establishing a three-dimensional cloud picture for the light steel structure assembly type building in real time.
Preferably, the sampling period satisfies:
if D is less than or equal to 3, the sampling period is 3-6 days;
if D is more than 3, the sampling period is 1-3 days;
wherein D is the number of layers of the light steel structure assembly type building.
Preferably, the displacement of the wall stud satisfies:
wherein S is 1i For the displacement of the ith middle node formed by the reverse bending points of adjacent columns in the wall frame column, S 1j J-th edge node data formed for reverse bending points of adjacent columns in the wall frame column are i=1, 2, …, n, j=1, 2, … and m.
Preferably, the displacement of the wall frame beam satisfies:
wherein S is 2i For the displacement of the ith middle node formed by the reverse bending points of adjacent beams in the wall frame beams, S 2j And (5) j-th edge node data formed by the reverse bending points of adjacent beams in the wall frame beams.
Preferably, the displacement of the connection node satisfies:
wherein S is 3i The displacement of the ith middle node formed by the reverse bending points of the adjacent nodes in the connecting nodes, S 3j And (5) forming jth edge node data for the reverse bending point of the adjacent node in the connection nodes.
Preferably, the rotational stiffness of the connection node satisfies:
wherein C is x Is the distance between adjacent nodes in the connected nodes.
Preferably, the transverse rigidity reduction coefficient of the connecting node is 0.1-0.5, and the longitudinal rigidity reduction coefficient of the connecting node is 0.2-0.5.
The beneficial effects of the invention are as follows:
according to the structural deformation monitoring method for the light steel structure assembled building, provided by the invention, the fracture scoring value is obtained through the monitored changes of the deformation data, the structural deformation is graded, and the trend of the structural deformation is timely monitored, so that the accuracy of structural deformation monitoring is realized, the accuracy of structural deformation monitoring is improved, and the safety of the light steel structure assembled building is ensured.
Detailed Description
The present invention is described in further detail below to enable those skilled in the art to practice the invention by reference to the specification.
The invention provides a structural deformation monitoring method of a light steel structure assembly type building, which comprises the following steps:
step one, a three-dimensional cloud picture is built for the light steel structure assembly type building in real time, and the displacement of a wall frame column, the displacement of a wall frame beam and the displacement of a connecting node are collected as deformation data according to a sampling period.
The method comprises the steps of arranging a plurality of sensors according to monitoring positions, and acquiring form data of the light steel structure assembly type building through the plurality of sensors so as to form a three-dimensional cloud picture.
The sampling period satisfies:
if D is less than or equal to 3, the sampling period is 3-6 days;
if D is more than 3, the sampling period is 1-3 days;
wherein D is the number of layers of the light steel structure assembly type building.
Step two, obtaining a real-time deformation value of the light steel structure assembly type building according to the collected two adjacent deformation data, and obtaining a fracture coefficient:
wherein ζ is the fracture coefficient, F x X is the ultimate bearing capacity of the connecting node x For the displacement of the connecting node, M x To carry bending moment to the limit of the connecting node, F i Is the ultimate bearing capacity of the wall frame column, X i For the displacement of the wall-frame column, M i For ultimate bearing bending moment of wall frame column, F j Is the ultimate bearing capacity of the wall frame beam, X j For the displacement of the wall frame beam M j For the ultimate bearing bending moment of the wall frame beam, K is the rotational rigidity of the connecting node, I o To reduce the coefficient of transverse rigidity of the connecting node, I p For the longitudinal rigidity reduction coefficient of the connecting node, D o To connect the lateral lengths of the nodes, D p Is the longitudinal length of the connection node.
Wherein, the displacement of wall frame post satisfies:
wherein S is 1i For the displacement of the ith middle node formed by the reverse bending points of adjacent columns in the wall frame column, S 1j J-th edge node data formed for reverse bending points of adjacent columns in the wall frame column are i=1, 2, …, n, j=1, 2, … and m.
The displacement of the wall frame beam satisfies the following conditions:
wherein S is 2i For the displacement of the ith middle node formed by the reverse bending points of adjacent beams in the wall frame beams, S 2j And (5) j-th edge node data formed by the reverse bending points of adjacent beams in the wall frame beams.
The displacement of the connection node satisfies:
wherein S is 3i The displacement of the ith middle node formed by the reverse bending points of the adjacent nodes in the connecting nodes, S 3j And (5) forming jth edge node data for the reverse bending point of the adjacent node in the connection nodes.
The rotational rigidity of the connecting node meets the following conditions:
wherein C is x Is the distance between adjacent nodes in the connected nodes.
In this embodiment, the transverse stiffness reduction coefficient of the connection node is 0.1-0.5, and the longitudinal stiffness reduction coefficient of the connection node is 0.2-0.5.
Step three, obtaining a fracture scoring value according to the fracture coefficient:
Y＝ξ×N；
wherein Y is a fracture score, ζ is a fracture coefficient, and N is a deformation score;
wherein the deformation scoring criteria are as shown in table one:
form-deformation scoring criteria table
Step four, if Y is less than 5, the first-stage deformation is performed;
if Y is more than or equal to 5 and less than 7, the second-stage deformation is performed;
if Y is more than or equal to 7, three-stage deformation is performed.
If the deformation is the first-level deformation, continuously monitoring the structural deformation of the light steel structure assembly building according to the original sampling period;
if the deformation is secondary deformation, the sampling period is adjusted according to the actual situation, and the sampling period can be generally adjusted to be 1 day or monitored in an hour;
if three-stage deformation is adopted, on-site personnel are required to be reminded, and the personnel are required to be rapidly evacuated and maintained.
According to the structural deformation monitoring method for the light steel structure assembled building, provided by the invention, the fracture scoring value is obtained through the monitored changes of the deformation data, the structural deformation is graded, and the trend of the structural deformation is timely monitored, so that the accuracy of structural deformation monitoring is realized, the accuracy of structural deformation monitoring is improved, and the safety of the light steel structure assembled building is ensured.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown, it is well suited to various fields of use for which the invention is suited, and further modifications may be readily made by one skilled in the art, and the invention is therefore not to be limited to the particular details and examples shown and described herein, without departing from the general concepts defined by the claims and the equivalents thereof.
Claims (4)
1. The method for monitoring the structural deformation of the light steel structure assembly type building is characterized by comprising the following steps of:
step one, acquiring displacement of a wall frame column, displacement of a wall frame beam and displacement of a connecting node as deformation data according to a sampling period;
step two, obtaining a real-time deformation value of the light steel structure assembly type building according to the collected two adjacent deformation data, and obtaining a fracture coefficient:
wherein ζ is the fracture coefficient, F x X is the ultimate bearing capacity of the connecting node x For the displacement of the connecting node, M x To carry bending moment to the limit of the connecting node, F i Is the ultimate bearing capacity of the wall frame column, X i For the displacement of the wall-mount column,M i for ultimate bearing bending moment of wall frame column, F j Is the ultimate bearing capacity of the wall frame beam, X j For the displacement of the wall frame beam M j For the ultimate bearing bending moment of the wall frame beam, K is the rotational rigidity of the connecting node, I o To reduce the coefficient of transverse rigidity of the connecting node, I p For the longitudinal rigidity reduction coefficient of the connecting node, D o To connect the lateral lengths of the nodes, D p Is the longitudinal length of the connection node;
wherein, the displacement of wall frame post satisfies:
wherein S is 1i For the displacement of the ith middle node formed by the reverse bending points of adjacent columns in the wall frame column, S 1j J-th edge node data formed by reverse bending points of adjacent columns in the wall frame column, i=1, 2, …, n, j=1, 2, …, m;
the displacement of the wall frame beam satisfies the following conditions:
wherein S is 2i For the displacement of the ith middle node formed by the reverse bending points of adjacent beams in the wall frame beams, S 2j The j-th edge node data formed by the reverse bending points of the adjacent beams in the wall frame beams;
the displacement of the connection node satisfies:
wherein S is 3i The displacement of the ith middle node formed by the reverse bending points of the adjacent nodes in the connecting nodes, S 3j The j-th edge node data is formed for the reverse bending point of the adjacent node in the connecting node;
the rotational rigidity of the connecting node meets the following conditions:
wherein C is x The distance between adjacent nodes in the connecting nodes is set;
step three, obtaining a fracture scoring value according to the fracture coefficient:
Y＝ξ×N；
wherein Y is a fracture score, ζ is a fracture coefficient, and N is a deformation score;
step four, if Y is less than 5, the first-stage deformation is performed;
if Y is more than or equal to 5 and less than 7, the second-stage deformation is performed;
if Y is more than or equal to 7, three-stage deformation is performed.
2. The method for monitoring structural deformation of a light gauge steel structure building of claim 1, wherein said step one further comprises:
and establishing a three-dimensional cloud picture for the light steel structure assembly type building in real time.
3. The method for monitoring structural deformation of a light gauge steel structure fabricated building of claim 2, wherein the sampling period satisfies:
if D is less than or equal to 3, the sampling period is 3-6 days;
if D is more than 3, the sampling period is 1-3 days;
wherein D is the number of layers of the light steel structure assembly type building.
4. A method of monitoring structural deformation of a light gauge steel structure fabricated building according to claim 3, wherein the transverse stiffness reduction coefficient of the connection node is 0.1-0.5, and the longitudinal stiffness reduction coefficient of the connection node is 0.2-0.5.
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