CN114413828A - 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
- Publication number
- CN114413828A CN114413828A CN202210072909.2A CN202210072909A CN114413828A CN 114413828 A CN114413828 A CN 114413828A CN 202210072909 A CN202210072909 A CN 202210072909A CN 114413828 A CN114413828 A CN 114413828A
- Authority
- CN
- China
- Prior art keywords
- deformation
- steel structure
- displacement
- light steel
- node
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000006073 displacement reaction Methods 0.000 claims abstract description 39
- 238000005070 sampling Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims description 19
- 230000009467 reduction Effects 0.000 claims description 12
- 238000010276 construction Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 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
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a structural deformation monitoring method for a light steel structure fabricated building, which comprises the following steps: the method comprises the following steps of firstly, collecting displacement of wall frame columns, displacement of wall frame beams and displacement of connecting nodes 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 adjacent twice deformation data, and obtaining a fracture coefficient; thirdly, obtaining a fracture score according to the fracture coefficient; step four, if Y is less than 5, the first-order deformation is carried out; if Y is more than or equal to 5 and less than 7, the deformation is a secondary deformation; if Y is more than or equal to 7, the deformation is three-level deformation. The method judges whether the structure is deformed or not and the grade of the deformation 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 for a light steel structure fabricated building.
Background
The prefabricated building is a building formed by assembling prefabricated components produced by a factory on a construction site, generally adopts standardized design, factory production and assembly 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 the building industry.
The prefabricated building mainly comprises a prefabricated concrete structure prefabricated building, a steel structure prefabricated building and a wood structure prefabricated building, wherein the steel structure prefabricated building can be divided into three sub-industries of a light steel structure prefabricated building, a multi-story high-rise steel structure prefabricated building and a space steel structure prefabricated building.
Compared with the prefabricated building with the prefabricated concrete structure, the light steel structure prefabricated building has smaller component size and can obtain larger use space; the wood structure assembly type building is higher in cost and does not meet the building development requirements of China.
At present, the country greatly promotes the construction of new rural areas, and the light steel structure assembly type building becomes the first choice of novel house construction due to the advantages of energy conservation, environmental protection, low foundation cost and the like, most of the light steel structure fabricated buildings are 1-3 layers of low-rise buildings, but in the existing requirements, the low-rise buildings gradually cannot meet the requirements of people, in the construction of light steel structure agricultural houses, at present, cold-bending thin-wall light steel structures are mostly used as main structures, however, the cold-formed thin-walled light gauge steel is an open structure, the thickness is generally about 0.8 mm, the defects of poor corrosion resistance, poor durability after corrosion, low strength of middle filling layer light slurry and the like exist, and the steel structure is more likely to be bent and deformed or partially broken, so that, in the construction process of the light steel structure assembly type building, a method for monitoring the structural deformation of the light steel structure assembly type building needs to be developed urgently.
Disclosure of Invention
The invention aims to design and develop a structural deformation monitoring method for a light steel structure fabricated building, which obtains a fracture score according to fracture coefficients through monitoring of a plurality of deformation data, and realizes the grading of structural deformation, thereby realizing the accuracy of structural deformation monitoring and improving the accuracy.
The technical scheme provided by the invention is as follows:
a method for monitoring structural deformation of a light steel structure fabricated building comprises the following steps:
the method comprises the following steps of firstly, collecting displacement of wall frame columns, displacement of wall frame beams and displacement of connecting nodes 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 adjacent twice deformation data, and obtaining a fracture coefficient:
where xi is the fracture coefficient, FxFor ultimate bearing capacity of the connecting node, XxFor displacement of connecting nodes, MxFor ultimate bearing bending moment of the connecting joint, FiUltimate bearing capacity, X, for wall studsiFor displacement of wall studs, MiUltimate bearing bending moment for wall-mounted column, FjUltimate bearing capacity, X, for wall-mounted beamsjFor displacement of wall-mounted beams, MjThe ultimate bearing bending moment of the wall frame beam, K is the rotational rigidity of the connecting joint, IoFor transverse stiffness reduction factor of the connecting node, IpFor longitudinal stiffness reduction factor of the connecting node, DoTo connect the lateral lengths of the nodes, DpIs the longitudinal length of the connection node;
thirdly, obtaining a fracture score according to the fracture coefficient:
Y＝ξ×N；
in the formula, Y is a fracture score, xi is a fracture coefficient, and N is a deformation score;
step four, if Y is less than 5, the first-order deformation is carried out;
if Y is more than or equal to 5 and less than 7, the deformation is a secondary deformation;
if Y is more than or equal to 7, the deformation is three-level deformation.
Preferably, the first step further comprises:
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;
and D is the number of layers of the light steel structure assembly type building.
Preferably, the displacement of the wall studs satisfies:
in the formula, S1iDisplacement of the ith central node formed by the inflection points of adjacent columns in the wall stud, S1jJ-th edge node data formed for the inflection points of adjacent columns in the wall frame column, i is 1,2, …, and n, j is 1,2, …, m.
Preferably, the displacement of the wall frame beam satisfies:
in the formula, S2iDisplacement of the ith central node formed by the inflection points of adjacent beams in the wall frame beam, S2jAnd j-th edge node data formed by the reverse bending points of adjacent beams in the wall frame beam.
Preferably, the displacement of the connection node satisfies:
in the formula, S3iDisplacement of the ith intermediate node formed for the reverse bending point of the adjacent node in the connection node, S3jAnd j-th edge node data formed by the reverse bending points of adjacent nodes in the connecting nodes.
Preferably, the rotational stiffness of the connection node satisfies:
in the formula, CxThe distance between adjacent nodes in the connection node.
Preferably, the transverse stiffness reduction coefficient of the connecting node is 0.1-0.5, and the longitudinal stiffness reduction coefficient of the connecting node is 0.2-0.5.
The invention has the following beneficial effects:
according to the structural deformation monitoring method for the light steel structure assembly type building, disclosed by the invention, the fracture score is obtained through the fracture coefficient according to the change of a plurality of monitored deformation data, the structural deformation is graded, and the trend of the structural deformation is monitored in time, 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 assembly type building is ensured.
Detailed Description
The present invention is described in further detail below in order to enable those skilled in the art to practice the invention with reference to the description.
The invention provides a structural deformation monitoring method of a light steel structure fabricated building, which comprises the following steps:
step one, establishing a three-dimensional cloud picture in real time for the light steel structure assembly type building, and collecting displacement of wall frame columns, displacement of wall frame beams and displacement of connecting nodes as deformation data according to a sampling period.
The method comprises the following steps that a plurality of sensors are arranged according to monitoring positions, and form data of the light steel structure assembly type building collected by the sensors are used for further forming 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;
and 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 adjacent twice deformation data, and obtaining a fracture coefficient:
where xi is the fracture coefficient, FxFor ultimate bearing capacity of the connecting node, XxFor displacement of connecting nodes, MxFor ultimate bearing bending moment of the connecting joint, FiUltimate bearing capacity, X, for wall studsiFor displacement of wall studs, MiUltimate bearing bending moment for wall-mounted column, FjUltimate bearing capacity, X, for wall-mounted beamsjFor displacement of wall-mounted beams, MjThe ultimate bearing bending moment of the wall frame beam, K is the rotational rigidity of the connecting joint, IoFor transverse stiffness reduction factor of the connecting node, IpFor longitudinal stiffness reduction factor of the connecting node, DoTo connect the lateral lengths of the nodes, DpIs the longitudinal length of the connecting node.
Wherein the displacement of the wall studs satisfies:
in the formula, S1iDisplacement of the ith central node formed by the inflection points of adjacent columns in the wall stud, S1jJ-th edge node data formed for the inflection points of adjacent columns in the wall frame column, i is 1,2, …, and n, j is 1,2, …, m.
The displacement of the wall frame beam meets the following requirements:
in the formula, S2iDisplacement of the ith central node formed by the inflection points of adjacent beams in the wall frame beam, S2jAnd j-th edge node data formed by the reverse bending points of adjacent beams in the wall frame beam.
The displacement of the connecting node satisfies:
in the formula, S3iDisplacement of the ith intermediate node formed for the reverse bending point of the adjacent node in the connection node, S3jAnd j-th edge node data formed by the reverse bending points of adjacent nodes in the connecting nodes.
The rotational stiffness of the connection node satisfies:
in the formula, CxThe distance between adjacent nodes in the connection node.
In this embodiment, the transverse stiffness reduction coefficient of the connection node is 0.1 to 0.5, and the longitudinal stiffness reduction coefficient of the connection node is 0.2 to 0.5.
Thirdly, obtaining a fracture score according to the fracture coefficient:
Y＝ξ×N；
in the formula, Y is a fracture score, xi is a fracture coefficient, and N is a deformation score;
wherein, the deformation scoring standard is shown in the table one:
table-deformation grading standard table
Step four, if Y is less than 5, the first-order deformation is carried out;
if Y is more than or equal to 5 and less than 7, the deformation is a secondary deformation;
if Y is more than or equal to 7, the deformation is three-level deformation.
If the first-level deformation is detected, continuously monitoring the structural deformation of the light steel structure assembly type building according to the original sampling period;
if the deformation is the second-level deformation, the sampling period is adjusted according to the actual situation, and the monitoring can be generally adjusted to be 1 day or hour;
if the deformation is three-level, the field personnel need to be reminded, and the personnel need to be evacuated rapidly and maintained.
According to the structural deformation monitoring method for the light steel structure assembly type building, disclosed by the invention, the fracture score is obtained through the fracture coefficient according to the change of a plurality of monitored deformation data, the structural deformation is graded, and the trend of the structural deformation is monitored in time, 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 assembly type building is ensured.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (8)
1. A method for monitoring structural deformation of a light steel structure fabricated building is characterized by comprising the following steps:
the method comprises the following steps of firstly, collecting displacement of wall frame columns, displacement of wall frame beams and displacement of connecting nodes 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 adjacent twice deformation data, and obtaining a fracture coefficient:
where xi is the fracture coefficient, FxFor ultimate bearing capacity of the connecting node, XxFor displacement of connecting nodes, MxFor ultimate bearing bending moment of the connecting joint, FiUltimate bearing capacity, X, for wall studsiFor displacement of wall studs, MiUltimate bearing bending moment for wall-mounted column, FjUltimate bearing capacity, X, for wall-mounted beamsjFor displacement of wall-mounted beams, MjThe ultimate bearing bending moment of the wall frame beam, K is the rotational rigidity of the connecting joint, IoFor transverse stiffness reduction factor of the connecting node, IpFor longitudinal stiffness reduction factor of the connecting node, DoTo connect the lateral lengths of the nodes, DpIs the longitudinal length of the connection node;
thirdly, obtaining a fracture score according to the fracture coefficient:
Y＝ξ×N；
in the formula, Y is a fracture score, xi is a fracture coefficient, and N is a deformation score;
step four, if Y is less than 5, the first-order deformation is carried out;
if Y is more than or equal to 5 and less than 7, the deformation is a secondary deformation;
if Y is more than or equal to 7, the deformation is three-level deformation.
2. The method for monitoring structural deformation of a light gauge steel structure fabricated building according to claim 1, wherein the first step 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 steel structure fabricated building according to 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;
and D is the number of layers of the light steel structure assembly type building.
4. The method for monitoring structural deformation of a light gauge steel structure fabricated building according to claim 3, wherein the displacement of the wall studs satisfies:
in the formula, S1iDisplacement of the ith central node formed by the inflection points of adjacent columns in the wall stud, S1jJ-th edge node data formed for the inflection points of adjacent columns in the wall frame column, i is 1,2, …, and n, j is 1,2, …, m.
5. The method for monitoring structural deformation of a light steel structure fabricated building according to claim 4, wherein the displacement of the wall frame beam satisfies:
in the formula, S2iDisplacement of the ith central node formed by the inflection points of adjacent beams in the wall frame beam, S2jAnd j-th edge node data formed by the reverse bending points of adjacent beams in the wall frame beam.
6. The method for monitoring structural deformation of a light steel structure fabricated building according to claim 5, wherein the displacement of the connection node satisfies:
in the formula, S3iDisplacement of the ith intermediate node formed for the reverse bending point of the adjacent node in the connection node, S3jAnd j-th edge node data formed by the reverse bending points of adjacent nodes in the connecting nodes.
7. The method for monitoring structural deformation of a light steel structure fabricated building according to claim 6, wherein the rotational stiffness of the connection node satisfies:
in the formula, CxThe distance between adjacent nodes in the connection node.
8. The method for monitoring structural deformation of a light gauge steel structure fabricated building according to claim 7, wherein the transverse stiffness reduction coefficient of the connection node is 0.1 to 0.5, and the longitudinal stiffness reduction coefficient of the connection node is 0.2 to 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072909.2A CN114413828B (en) | 2022-01-21 | 2022-01-21 | Structural deformation monitoring method for light steel structure assembly type building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072909.2A CN114413828B (en) | 2022-01-21 | 2022-01-21 | Structural deformation monitoring method for light steel structure assembly type building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114413828A true CN114413828A (en) | 2022-04-29 |
| CN114413828B CN114413828B (en) | 2023-12-29 |
Family
ID=81275255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210072909.2A Active CN114413828B (en) | 2022-01-21 | 2022-01-21 | Structural deformation monitoring method for light steel structure assembly type building |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114413828B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2554996B2 (en) * | 1993-01-19 | 1996-11-20 | 株式会社ヒューテック | Non-destructive inspection of mechanical behavior of a loaded object, its determination method and its apparatus |
| JP2005181108A (en) * | 2003-12-19 | 2005-07-07 | Railway Technical Res Inst | Crack-monitoring material and crack-monitoring system |
| CN104931576A (en) * | 2012-09-14 | 2015-09-23 | 天津大学 | Method for characterizing welding crack propagation process |
| CN108439120A (en) * | 2018-03-28 | 2018-08-24 | 广州广日电梯工业有限公司 | A kind of elevator steel structure girder device for detecting deformation and the method for deformation analysis processing |
| US20200400419A1 (en) * | 2019-01-21 | 2020-12-24 | Shenzhen University | Pipeline three-dimensional curve measuring robot and implementation method therefor |
| CN113237885A (en) * | 2021-04-22 | 2021-08-10 | 西安石油大学 | Building performance evaluation method based on structural health monitoring data |
| KR102329607B1 (en) * | 2021-05-11 | 2021-11-22 | 김창혁 | Structural Displacement Measurement System |
| CN113900381A (en) * | 2021-12-10 | 2022-01-07 | 西南科技大学 | Steel structure remote health monitoring platform based on Internet of things and application method |
-
2022
- 2022-01-21 CN CN202210072909.2A patent/CN114413828B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2554996B2 (en) * | 1993-01-19 | 1996-11-20 | 株式会社ヒューテック | Non-destructive inspection of mechanical behavior of a loaded object, its determination method and its apparatus |
| JP2005181108A (en) * | 2003-12-19 | 2005-07-07 | Railway Technical Res Inst | Crack-monitoring material and crack-monitoring system |
| CN104931576A (en) * | 2012-09-14 | 2015-09-23 | 天津大学 | Method for characterizing welding crack propagation process |
| CN108439120A (en) * | 2018-03-28 | 2018-08-24 | 广州广日电梯工业有限公司 | A kind of elevator steel structure girder device for detecting deformation and the method for deformation analysis processing |
| US20200400419A1 (en) * | 2019-01-21 | 2020-12-24 | Shenzhen University | Pipeline three-dimensional curve measuring robot and implementation method therefor |
| CN113237885A (en) * | 2021-04-22 | 2021-08-10 | 西安石油大学 | Building performance evaluation method based on structural health monitoring data |
| KR102329607B1 (en) * | 2021-05-11 | 2021-11-22 | 김창혁 | Structural Displacement Measurement System |
| CN113900381A (en) * | 2021-12-10 | 2022-01-07 | 西南科技大学 | Steel structure remote health monitoring platform based on Internet of things and application method |
Non-Patent Citations (3)
| Title |
|---|
| TIMOTHY A. HAMPSHIRE: "Monitoring the behavior of steel structures using distributed optical fiber sensors", 《JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH》, vol. 53, no. 3, pages 267 - 281 * |
| 吴少伟: "太原南站钢结构健康监测方案及安全预警研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, no. 02, pages 038 - 656 * |
| 张艺露: "钢结构预制墙板性能研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, no. 04, pages 038 - 712 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114413828B (en) | 2023-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ferdous et al. | New advancements, challenges and opportunities of multi-storey modular buildings–A state-of-the-art review | |
| CN205035905U (en) | Assembled shaped steel - concrete slab makes up flat beam | |
| CN103364829A (en) | Selection method for inputting earthquake waves in time-procedure analysis for earthquake resistance of complex structures | |
| CN201521058U (en) | Building cold bending thin-wall truss type floor beam | |
| Noorzai et al. | Selecting a proper construction system in small and medium mass housing projects, considering success criteria and construction volume and height | |
| CN104179250A (en) | Light-board house system and construction method thereof | |
| Du Peloux et al. | The Ephemeral Cathedral of Créteil: a 350m2 lightweight gridshell structure made of 2 kilometers of GFRP tubes | |
| CN114413828A (en) | Structural deformation monitoring method for light steel structure assembly type building | |
| CN114971332A (en) | Method and medium for detecting and identifying basic health condition of transformer substation building and equipment | |
| CN103883032A (en) | I-shaped steel plate shear wall with built-in round steel reinforcement cages and externally-attached steel plate supports and manufacturing method | |
| GuNawardeNa et al. | Performance of multi-storey prefabricated modular buildings with infill concrete walls subjected to earthquake loads | |
| Premrov et al. | Innovative Structural Systems for Timber Buildings: A Comprehensive Review of Contemporary Solutions | |
| CN108733950B (en) | Linear measurement control method for multi-curved-surface twisted steel tower | |
| CN113139993B (en) | Intelligent identification method for bridge linear data | |
| Gupta et al. | Exploration of prefabricated building system in housing construction | |
| CN111259477B (en) | Atrium layering frame column design method based on rigidity equivalence | |
| CN207794407U (en) | A kind of composite floor system system based on beams of concrete and light gauge cold-formed steel shape beam | |
| CN201614700U (en) | Lightweight steel skeleton-type stair | |
| CN201047126Y (en) | Prefabricated building module component | |
| CN204510613U (en) | A kind of light gauge cold-formed steel shape System Framework structure for building | |
| Cruces et al. | Non-Linear Pushover Analysis of Tall Buildings with Post-Tensioned Slabs and Rigid Core Designed Under Peruvian Codes | |
| CN115977246B (en) | Steel pipe column and beam or truss chord member connection node connected by cross batten plates | |
| CN114519228B (en) | Anti-overturning stress rapid calculation method for skirt house floor slab with large height-width ratio double-tower structure | |
| CN216552372U (en) | Assembled steel structure system based on guarantee room and guarantee room | |
| CN110158764A (en) | A kind of assembled sheet-pile steel structure system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |