CN116226956B - Intelligent sliding construction method and system for large-span structure with minimized construction internal force - Google Patents
Intelligent sliding construction method and system for large-span structure with minimized construction internal force Download PDFInfo
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Abstract
The invention relates to a large-span structure intelligent slip construction calculation method and a system, comprising the following steps: determining a total traction force F based on the friction characteristics of the contact position of the track and the structure and the weight of the structure; comprehensively determining the number n of the traction points according to the configuration condition and the structural arrangement condition of the construction site tools; calculating vertical stress response when the structure is under the dead weight working condition, and recording the axial force of all the rods under the dead weight; all possible slipping traction point positions are listed, and the numbers of different traction point combinations are marked as i; calculating the axial force of all the rods after the structure is tensioned in the ith state; respectively superposing the axial forces of the rod pieces, and recording the maximum axial force rod piece as F i The method comprises the steps of carrying out a first treatment on the surface of the Traversal F i And selecting the minimum value, wherein the traction scheme to which the minimum value belongs is optimal. According to the invention, the optimal position of the sliding traction point is obtained in a traversing mode, so that the construction internal force generated in the structure sliding process is the minimum value. By ensuring that the out-of-plane stress influence of the structure in the sliding and pulling process is minimum, the structure internal force value is reduced, and finally the material saving is realized.
Description
Technical Field
The invention belongs to the fields of large-span structures, structural designs and construction in civil engineering disciplines, and particularly relates to an intelligent sliding construction method and system for a large-span structure, which minimize construction internal force.
Background
The large-span structure rapidly develops along with the urban process in China, and becomes a most commonly used structural form. Thus, the installation of large spans is currently a relatively interesting direction. Typical construction of a large-span structure is carried out by adopting a process of assembling a single truss in the air, pulling and sliding the truss to a designated position and fixing the structure. The pulling and sliding process will exert out-of-plane effects on the structure, which will tend to deform under forces that are unexpected in the structure, thus requiring reinforcement of the cross-sectional dimensions of the structure. If the additional out-of-plane forces generated during the pulling slip can be controlled to a minimum, an economical use of material can be achieved.
Therefore, how to determine a plurality of sliding traction points on a structure so as to enable the construction internal force generated in the sliding process of the structure to be the minimum value becomes a problem to be solved urgently for civil construction professions.
Disclosure of Invention
The invention aims to provide a large-span structure intelligent sliding construction method and system for minimizing construction internal force, which are used for searching a traction point with the smallest stress in the structure construction by traversing all possible traction stress states so as to ensure that the out-of-plane stress influence of the structure sliding traction process is smallest.
The invention provides a large-span structure intelligent sliding construction method for minimizing construction internal force, which comprises the following steps:
s1, determining the total traction force required by the sliding construction based on the friction characteristic of the contact position of the track and the structure and the weight of the large-span structure;
s2, determining the number of sliding traction points required for applying the total traction force based on the field tool configuration condition of the sliding construction and the arrangement condition of the large-span structure;
s3, calculating stress response of the large-span structure under the dead weight working condition, and calculating dead weight axial force of each rod piece under the dead weight working condition based on the stress response; the rod piece corresponds to a single truss in the large-span structure;
s4, determining all corresponding sliding traction point positions based on the sliding traction point number; arranging and combining all the corresponding sliding traction points according to the first construction requirement to form a plurality of different traction point combination states; forming a plurality of different traction working conditions based on the combination state of the plurality of different traction points;
s5, working condition axial forces of the rods corresponding to the large-span structure under different traction working conditions are calculated;
s6, superposing the dead weight axial force of the rod piece under the dead weight working condition in the S3 and the working condition axial force of the same rod piece under the dead weight working condition corresponding to the large-span structure under the different traction working conditions in the S5 to obtain a plurality of axial force superposition values; comparing a plurality of axial force superposition values, and recording the maximum value in the axial force superposition values as N imax ；
S7, respectively implementing S6 on each rod piece, determining the maximum axial force superposition value of each rod piece, traversing the maximum axial force superposition value of each rod piece, comparing, selecting the minimum value, and determining the traction scheme corresponding to the minimum value as the optimal construction scheme; the traction scheme comprises a traction point combination state and a corresponding working condition;
s8, carrying out the sliding construction according to the optimal construction scheme.
Preferably, the friction characteristic comprises a coefficient of friction.
Preferably, the weight of the large-span structure is calculated according to the geometric parameters and the material characteristics of the large-span structure.
Preferably, the total pulling force required for the slip construction is the product of the coefficient of friction and the weight of the large-span structure.
Preferably, the step S2 of determining the number of slip traction points required for applying the total traction force based on the field tool configuration condition of the slip construction and the arrangement condition of the large-span structure includes:
s21, determining rated output traction force g of the field tool for the slip construction based on the configuration condition of the field tool for the slip construction;
s22, the number of the sliding traction points required by the total traction force is not less than (the weight of the large-span structure/the rated output traction force g of the field tool for sliding construction).
Preferably, the number of slip pull points required for the total pull force is not less than 2.
Preferably, the stress response of the step S3 is a vertical stress response, the weight of the large-span structure is equivalent to an upper chord node load or a load uniformly distributed among rods, and the dead weight axial force of the rod piece is calculated based on the fact that the contact position of the track and the structure is set as a hinge constraint.
The second aspect of the present invention is also to provide a large span structure intelligent slip construction system minimizing construction internal force, comprising:
the total traction force determining module is used for determining the total traction force required by the sliding construction based on the friction characteristic of the contact position of the track and the structure and the weight of the large-span structure;
the slippage traction point number determining module is used for determining the slippage traction point number required by applying the total traction force based on the field tool configuration condition of slippage construction and the arrangement condition of the large-span structure;
the stress response module is used for calculating stress response of the large-span structure under the dead weight working condition and calculating dead weight axial force of each rod piece under the dead weight working condition based on the stress response; the rod piece corresponds to a single truss in the large-span structure;
the traction working condition determining module is used for determining all corresponding sliding traction point positions based on the sliding traction point number; arranging and combining all the corresponding sliding traction points according to the first construction requirement to form a plurality of different traction point combination states; forming a plurality of different traction working conditions based on the combination state of the plurality of different traction points;
the working condition axial force calculation module is used for calculating the working condition axial force of each rod piece corresponding to the large-span structure under different traction working conditions;
the axial force superposition module is used for superposing the dead weight axial force of the rod piece under the dead weight working condition and the working condition axial force of the same rod piece under the dead weight working condition corresponding to the large-span structure under different traction working conditions respectively to obtain a plurality of axial force superposition values; comparing a plurality of axial force superposition values, and recording the maximum value in the axial force superposition values as N imax ；
The optimal construction scheme determining module is used for respectively determining the maximum axial force superposition value of each rod piece for each rod piece, traversing the maximum axial force superposition value of each rod piece, comparing, selecting the minimum value, and determining the traction scheme corresponding to the minimum value as the optimal construction scheme; the traction scheme comprises a traction point combination state and a corresponding working condition;
and the sliding construction module is used for carrying out sliding construction according to the optimal construction scheme.
A third aspect of the invention provides an electronic device comprising a processor and a memory, the memory storing a plurality of instructions, the processor being for reading the instructions and performing the method according to the first aspect.
A fourth aspect of the invention provides a computer readable storage medium storing a plurality of instructions readable by a processor and for performing the method of the first aspect.
The method, the device, the electronic equipment and the computer readable storage medium provided by the invention have the following steps of
The beneficial effects are that:
by means of the scheme, the intelligent sliding construction calculation method and system of the large-span structure are used for obtaining the optimal position of the sliding traction point in a traversing mode, so that the construction internal force generated in the sliding process of the structure is the minimum. By ensuring that the out-of-plane stress influence of the structure in the sliding and pulling process is minimum, the structure internal force value is reduced, and finally the material saving is realized. The calculation method is suitable for the traction and sliding construction process of the large-span structure.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a flow chart of a method for intelligent slip construction calculation for a large-span structure according to a preferred embodiment of the present invention;
FIG. 2 is a front view of a large slip structure according to a preferred embodiment of the present invention;
FIG. 3 is a top view of a large-span slip structure according to a preferred embodiment of the present invention;
fig. 4 is a schematic diagram of a intelligent slip construction system for a large span structure according to a preferred embodiment of the present invention.
Reference numerals in the drawings:
1-a left side supporting point of the structure; 2-a right side supporting point of the structure; 3-a structure to be slipped; 4, a friction force bearing point of the structure to be slipped at the supporting point; 5-point of application of total pulling force.
300-an electronic device; 301-memory; 302-a processor; 303-a communication interface; 304-bus architecture.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the embodiment provides an intelligent sliding construction method for a large-span structure, which comprises the following steps:
s1, determining the total traction force required by the sliding construction based on the friction characteristic of the contact position of the rail and the structure and the weight of the large-span structure.
Determining a friction coefficient mu according to the characteristics of the contact surface of the track and the structure; the structural weight G is calculated from the structural geometry, the material. Total pulling force f=μ×g.
S2, determining the number a of sliding traction points required for applying the total traction force based on the field tool configuration condition of the sliding construction and the arrangement condition of the large-span structure. The rated output traction force of the construction site machine tool is G, and the number of traction points a is not less than (G/G) and not less than 2.
S3, calculating stress response of the large-span structure under the dead weight working condition, and calculating dead weight axial force of each rod piece under the dead weight working condition based on the stress response; wherein the rod piece corresponds to a single truss in the large-span structure. In the embodiment, the structural weight G is calculated according to the structural geometry and materials, and is equivalent to the load of an upper chord node (or the load uniformly distributed among rods), the self-weight axial force N of the rod piece is calculated based on the fact that the contact position of the track and the structure is set as the hinge constraint g 。
S4, determining all corresponding sliding traction point positions based on the sliding traction point number; arranging and combining all the corresponding sliding traction points according to the first construction requirement to form a plurality of different traction point combination states; based on a plurality of different traction point combination states, a plurality of different traction working conditions are formed, and the serial numbers are respectively: 1,2, … …, i, … …, n.
S5, working condition axial forces of the rods corresponding to the large-span structure under different traction working conditions are calculated and recorded as N fi ；
S6, superposing the dead weight axial force of the rod piece under the dead weight working condition in the S3 and the working condition axial force of the same rod piece under the dead weight working condition corresponding to the large-span structure under the different traction working conditions in the S5 to obtain a plurality of axial force superposition values; comparing a plurality of axial force superposition values, and recording the maximum value in the axial force superposition values as N imax ；
S7, respectively implementing S6 on each rod piece, determining the maximum axial force superposition value of each rod piece, traversing the maximum axial force superposition value of each rod piece, comparing, selecting the minimum value, and determining the traction scheme corresponding to the minimum value as the optimal construction scheme; the traction scheme comprises a traction point combination state and a corresponding working condition;
s8, carrying out the sliding construction according to the optimal construction scheme.
Example two
As shown in fig. 2-3, a large span structure intelligent slip construction system minimizing construction internal force, comprising:
the total traction force determining module is used for determining the total traction force required by the sliding construction based on the friction characteristic of the contact position of the track and the structure and the weight of the large-span structure;
the slippage traction point number determining module is used for determining the slippage traction point number required by applying the total traction force based on the field tool configuration condition of slippage construction and the arrangement condition of the large-span structure;
the stress response module is used for calculating stress response of the large-span structure under the dead weight working condition and calculating dead weight axial force of each rod piece under the dead weight working condition based on the stress response; the rod piece corresponds to a single truss in the large-span structure;
the traction working condition determining module is used for determining all corresponding sliding traction point positions based on the sliding traction point number; arranging and combining all the corresponding sliding traction points according to the first construction requirement to form a plurality of different traction point combination states; forming a plurality of different traction working conditions based on the combination state of the plurality of different traction points;
the working condition axial force calculation module is used for calculating the working condition axial force of each rod piece corresponding to the large-span structure under different traction working conditions;
the axial force superposition module is used for superposing the dead weight axial force of the rod piece under the dead weight working condition and the working condition axial force of the same rod piece under the dead weight working condition corresponding to the large-span structure under different traction working conditions respectively to obtain a plurality of axial force superposition values; comparing a plurality of axial force superposition values, and recording the maximum value in the axial force superposition values as N imax ；
The optimal construction scheme determining module is used for respectively determining the maximum axial force superposition value of each rod piece for each rod piece, traversing the maximum axial force superposition value of each rod piece, comparing, selecting the minimum value, and determining the traction scheme corresponding to the minimum value as the optimal construction scheme; the traction scheme comprises a traction point combination state and a corresponding working condition;
and the sliding construction module is used for carrying out sliding construction according to the optimal construction scheme.
Based on the same inventive concept as the intelligent slip construction calculation method of the above embodiment, the present application further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the method as in the first embodiment.
Exemplary electronic device
The electronic device of the present application is described below with reference to figure 4,
based on the same inventive concept as the intelligent sliding construction calculation method of the large-span structure in the foregoing embodiment, the present application further provides an intelligent sliding construction system of the large-span structure, including: a processor coupled to a memory for storing a program that, when executed by the processor, causes the system to perform the steps of the method of embodiment one.
The electronic device 300 includes: a processor 302, a communication interface 303, a memory 301. Optionally, the electronic device 300 may also include a bus architecture 304. Wherein the communication interface 303, the processor 302 and the memory 301 may be interconnected by a bus architecture 304; the bus architecture 304 may be a peripheral component interconnect (peripheral component interconnect, PCI) bus, or an extended industry standard architecture (extended industry Standard architecture, EISA) bus, among others. The bus architecture 304 may be divided into address buses, data buses, control buses, and the like. For ease of illustration, only one thick line is shown in fig. 4, but not only one bus or one type of bus.
Processor 302 may be a CPU, microprocessor, ASIC, or one or more integrated circuits for controlling the execution of the programs of the present application.
The communication interface 303 uses any transceiver-like means for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), wired access network, etc.
The memory 301 may be, but is not limited to, ROM or other type of static storage device, RAM or other type of dynamic storage device, which may store static information and instructions, or may be an electrically erasable programmable read-only memory (electrically erasable Programmable read only memory, EEPROM), a compact disk read-only memory (compact discread only memory, CD ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor through bus architecture 304. The memory may also be integrated with the processor.
The memory 301 is used for storing computer-executable instructions for executing the embodiments of the present application, and is controlled by the processor 302 to execute the instructions. The processor 302 is configured to execute computer-executable instructions stored in the memory 301, so as to implement the method for calculating intelligent slip construction of a large-span steel structure according to the above embodiment of the present application.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus.
The computer finger
Such as may be stored in or transmitted from one computer readable storage medium to another, such as from one website, computer, server, or data center via a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. that can be integrated with the available medium. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (9)
1. The intelligent sliding construction method for the large-span structure is characterized by comprising the following steps of:
s1, determining the total traction force required by the sliding construction based on the friction characteristic of the contact position of the track and the structure and the weight of the large-span structure;
s2, determining the number of sliding traction points required for applying the total traction force based on the field tool configuration condition of the sliding construction and the arrangement condition of the large-span structure, wherein the method comprises the following steps:
s21, determining rated output traction force g of the field tool for the slip construction based on the configuration condition of the field tool for the slip construction;
s22, the number of the sliding traction points required by the total traction force is not less than g which is the weight of the large-span structure divided by the rated output traction force of the field tool for sliding construction;
s3, calculating stress response of the large-span structure under the dead weight working condition, and calculating dead weight axial force of each rod piece under the dead weight working condition based on the stress response; the rod piece corresponds to a single truss in the large-span structure;
s4, determining all corresponding sliding traction point positions based on the sliding traction point number; arranging and combining all the corresponding sliding traction points according to the first construction requirement to form a plurality of different traction point combination states; forming a plurality of different traction working conditions based on the combination state of the plurality of different traction points;
s5, working condition axial forces of the rods corresponding to the large-span structure under different traction working conditions are calculated;
s6, superposing the dead weight axial force of the rod piece under the dead weight working condition in the S3 and the working condition axial force of the same rod piece under the dead weight working condition corresponding to the large-span structure under the different traction working conditions in the S5 to obtain a plurality of axial force superposition values; comparing a plurality of axial force superposition values, and recording the maximum value in the axial force superposition values as N imax ；
S7, respectively implementing S6 on each rod piece, determining the maximum axial force superposition value of each rod piece, traversing the maximum axial force superposition value of each rod piece, comparing, selecting the minimum value, and determining the traction scheme corresponding to the minimum value as the optimal construction scheme; the traction scheme comprises a traction point combination state and a corresponding working condition;
s8, carrying out the sliding construction according to the optimal construction scheme.
2. The intelligent slip construction method for a large span structure to minimize construction internal forces according to claim 1, wherein said friction characteristics comprise a coefficient of friction.
3. The intelligent sliding construction method for the large-span structure, which minimizes construction internal force, according to claim 2, wherein the weight of the large-span structure is obtained through calculation according to geometric parameters and material characteristics of the large-span structure.
4. A method of intelligent slip construction for a large span structure to minimize construction internal forces as claimed in claim 3, wherein the total pulling force required for the slip construction is the product of the coefficient of friction and the weight of the large span structure.
5. The intelligent sliding construction method for the large-span structure, which minimizes construction internal force, according to claim 4, wherein the number of sliding traction points required by the total traction force is not less than 2.
6. The intelligent sliding construction method for the large-span structure, which is used for minimizing construction internal force, according to claim 5, is characterized in that the stress response of the S3 is a vertical stress response, the weight of the large-span structure is equivalent to upper chord node load or uniformly distributed load among rods, and the dead weight axial force of the rod piece is calculated based on the fact that the contact position of the track and the structure is set as hinging constraint.
7. A large span structure intelligent slip construction system that minimizes construction internal forces, comprising:
the total traction force determining module is used for determining the total traction force required by the sliding construction based on the friction characteristic of the contact position of the track and the structure and the weight of the large-span structure;
the slippage traction point number determining module is used for determining the slippage traction point number required by applying the total traction force based on the field tool configuration condition of slippage construction and the arrangement condition of the large-span structure, and comprises the following components:
s21, determining rated output traction force g of the field tool for the slip construction based on the configuration condition of the field tool for the slip construction;
s22, the number of the sliding traction points required by the total traction force is not less than g which is the weight of the large-span structure divided by the rated output traction force of the field tool for sliding construction;
the stress response module is used for calculating stress response of the large-span structure under the dead weight working condition and calculating dead weight axial force of each rod piece under the dead weight working condition based on the stress response; the rod piece corresponds to a single truss in the large-span structure;
the traction working condition determining module is used for determining all corresponding sliding traction point positions based on the sliding traction point number; arranging and combining all the corresponding sliding traction points according to the first construction requirement to form a plurality of different traction point combination states; forming a plurality of different traction working conditions based on the combination state of the plurality of different traction points;
the working condition axial force calculation module is used for calculating the working condition axial force of each rod piece corresponding to the large-span structure under different traction working conditions;
the axial force superposition module is used for superposing the dead weight axial force of the rod piece under the dead weight working condition and the working condition axial force of the same rod piece under the dead weight working condition corresponding to the large-span structure under different traction working conditions respectively to obtain a plurality of axial force superposition values; comparing a plurality of axial force superposition values, and recording the maximum value in the axial force superposition values as N imax ；
The optimal construction scheme determining module is used for respectively determining the maximum axial force superposition value of each rod piece for each rod piece, traversing the maximum axial force superposition value of each rod piece, comparing, selecting the minimum value, and determining the traction scheme corresponding to the minimum value as the optimal construction scheme; the traction scheme comprises a traction point combination state and a corresponding working condition;
and the sliding construction module is used for carrying out sliding construction according to the optimal construction scheme.
8. An electronic device comprising a processor and a memory, the memory storing a plurality of instructions, the processor configured to read the instructions and perform the method of any of claims 1-6.
9. A computer readable storage medium storing a plurality of instructions readable by a processor and for performing the method of any one of claims 1-6.
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| 周庆辉.大跨度钢结构滑移施工中同步控制分析.北京建筑大学学报.2020,第36卷(第1期),全文. * |
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