CN112597561A - Pre-control method for deformation of super high-rise building structure - Google Patents
Pre-control method for deformation of super high-rise building structure Download PDFInfo
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Abstract
In order to enable the determination of the compensation regulation value of the vertical deformation to be closer to the actual situation, better realize the control of the construction quality of the super high-rise and more convenient operation in the aspect of compensation implementation, the invention provides a method for pre-controlling the structural deformation of the super high-rise building. The technical scheme of the pre-control method for the structural deformation of the super high-rise building is as follows: s1, setting a guiding and measuring leveling position in the construction process of the building structure; and S2, performing simulation analysis on the construction process of the upper structure of the building structure, and performing first compensation on the vertical deformation of the building structure at each guiding, measuring and leveling position to obtain an upper structure load model.
Description
Technical Field
The invention belongs to the field of building construction quality control, and particularly relates to a method for pre-controlling structural deformation of a super high-rise building.
Background
Because the number of layers of the super high-rise structure is large, the height of the super high-rise structure is high, the vertical load can be gradually increased along with the progress of construction, and the vertical elastic compression deformation of the structure is increased. Meanwhile, the vertical deformation is increased along with the increase of time due to the shrinkage creep characteristic of the concrete. The super high-rise core tube is mainly of a reinforced concrete structure, and the peripheral frame column is mainly of a section steel concrete structure. The difference of the two structural systems causes the difference of the overall elastic modulus, and the core cylinder and the frame column cause the difference of the deformation of the core cylinder and the frame under the actions of load, concrete shrinkage creep and the like, thereby forming the deformation difference. The deformation of the core barrel and the differential deformation of the barrel columns affect the safety and quality of structural elevation, curtain walls, electromechanical pipelines, floor levelness, structural members and the like.
In order to eliminate various influences caused by deformation, pre-deformation control is required in the super high-rise construction process. The current general idea of pre-deformation control is to obtain deformation and differential deformation values through calculation, and then compensate the calculated deformation values to the original design elevation during the structural construction according to a certain rule.
The current methods adopted by pre-deformation control from calculation and pre-control measures and the main problems are as follows:
one, calculation aspect
At present, the super high-rise deformation calculation is completed by using finite elements, and the precise simulation of the whole process is adopted, but a lot of calculations are not matched with the actual construction process items. The most important thing is that the super high-rise construction simulation does not consider that the construction unit can check the elevation once every a period of time so as to ignore the existing error, namely, the constructed height is guided, measured and leveled. The elevation through guiding measurement leveling ignores the influence of vertical deformation, if the guiding measurement leveling in the construction process is not considered, the calculated vertical deformation and the differential deformation are obviously larger than the actual deformation, which is the reason why many scholars calculate that the vertical deformation value of the super high-rise is smaller than the measured value.
In addition, the structure and the foundation are not considered as a whole when the differential deformation of the core tube and the peripheral frame columns is calculated, and the influence of the deformation of the foundation on the differential deformation is not considered.
Second, the aspect of pre-deformation control measures
(1) The method is most accurate in theory, and because the compensation value of each layer is very small and mostly smaller than 1mm, the method cannot realize accurate compensation regulation in reality in consideration of construction conditions, so that the scheme is only limited in theory and cannot be realized in reality.
(2) The method is simple in calculation, and because the same compensation value is adopted in each floor of the same construction section, the construction is simpler theoretically. This method is the same as the first method, and is theoretically possible, but cannot be implemented in actual construction.
(3) And (3) once compensation is carried out on the top of the construction section, wherein the method is different from the method (2) in that the compensation value of each floor in the construction section is intensively compensated on the top of the construction section. The method is a method commonly adopted in construction. However, the method has the advantages that construction sections are divided randomly, and vertical deformation and differential deformation rules of the super high-rise building are not considered.
Disclosure of Invention
In order to enable the determination of the compensation regulation value of the vertical deformation to be closer to the actual situation, better realize the control of the construction quality of the super high-rise and more convenient operation in the aspect of compensation implementation, the invention provides a method for pre-controlling the structural deformation of the super high-rise building.
The technical scheme of the pre-control method for the structural deformation of the super high-rise building is as follows:
a method for pre-controlling deformation of a super high-rise building structure comprises the following steps:
s1, setting a guiding, measuring and leveling position in the construction process of the building structure;
and S2, performing simulation analysis on the construction process of the upper structure of the building structure, and performing first compensation on the vertical deformation of the building structure at each guiding, measuring and leveling position to obtain an upper structure load model.
According to the method for pre-controlling the structural deformation of the super high-rise building, the guidance, measurement and leveling in the construction process are considered during simulation analysis, so that the compensation value of vertical deformation is closer to the actual situation.
Further, in the method for pre-controlling deformation of a super high-rise building structure, in S2, the first compensation method includes:
s2-1, calculating to obtain a vertical accumulated deformation value delta L of the building structure at the nth guiding and measuring leveling position according to simulation analysis;
s2-2, building a column body, compensating to the upper part of the building structure at the nth guiding, measuring and leveling position, matching the section of the column body with the section of the building structure at the nth guiding, measuring and leveling position, and matching the height of the column body with the vertical accumulated deformation value delta L;
and S2-3, repeating S2-1 and S2-2, and completing deformation compensation of the building structure at each guiding, measuring and leveling position one by one from bottom to top.
According to the method for pre-controlling the deformation of the super high-rise building structure, in the compensation process, the deformation compensation of the building structure at each guiding and leveling position is completed one by one from bottom to top from the 1 st guiding and leveling position, so that the error of the deformation compensation can be further reduced, and a good foundation is laid for improving the construction quality.
Further, in the method for pre-controlling deformation of the super high-rise building structure, S2-1, when the vertical accumulated deformation value delta L is less than 5mm, S2-2 is skipped. When the cumulative deformation value Δ L is too small, it is difficult to perform actual construction. Therefore, if the vertical accumulated deformation value Δ L at a certain guiding leveling position is less than 5mm, S2-2 is skipped. Thus, the vertical accumulated deformation value Δ L at the leveling position will be accumulated to the vertical accumulated deformation value Δ L at the next leveling position.
Further, the method for pre-controlling deformation of the super high-rise building structure further comprises the following steps:
s3, the building structure comprises a first structure and a second structure, in the upper structure load model, the first structure is calculated according to line load, and the second structure is calculated according to concentrated load;
s4, establishing a bottom plate model of the building structure, wherein the pile foundation and the foundation are simulated into a spring, and the elastic coefficients of the pile foundation and the foundation are determined according to a geological survey report;
s5, loading the upper structure load model into the bottom plate model to form an integral model;
and S6, performing simulation analysis on the building structure according to the integral model, and performing secondary compensation on the vertical deformation of the building structure.
The method for pre-controlling the deformation of the super high-rise building structure not only considers the guiding measurement and leveling in the construction process, but also considers the influence of different structures of the building structure and the non-uniform deformation of the bottom plate on the deformation of the building structure, thereby further reducing the error of deformation compensation. In addition, the simulation analysis mode can greatly reduce the modeling workload under the condition of accurately simulating the uneven deformation of the foundation, and meanwhile, the calculation running time can also be reduced.
Further, in the method for pre-controlling deformation of the super high-rise building structure, in S6, the second compensation method includes:
s6-1, calculating the vertical accumulated deformation value delta L of the first structure at different heights according to the integral model1And the vertical accumulated deformation value delta L of the second structure2；
S6-2, establishing an optimization function, and determining a compensation position and a compensation value by taking the minimum compensation times as a target and the optimal compensation range as a constraint condition;
S6-3according to the optimization function, the position of the nth compensation point and the vertical accumulated deformation value delta L of the first structure at the position are obtained through calculation1And the vertical accumulated deformation value delta L of the second structure2；
S6-4, a column body is built and compensated to the upper part of the building structure at the position of the nth compensation point, the upper section of the column body is a plane, the lower section of the column body is matched with the upper section of the building structure at the position of the nth compensation point, the height of each surface of the column body is equal to the vertical accumulated deformation value delta L of the first structure1And the vertical accumulated deformation value delta L of the second structure2Matching;
and S6-5, repeating S6-3 and S6-4, and completing the position confirmation of the compensation points and the deformation compensation of the building structure at the positions of the compensation points one by one from bottom to top.
According to the method for pre-controlling the deformation of the super high-rise building structure, the position and the compensation value of the compensation point can be more reasonably determined through the optimization function, and the problem that the operation cannot be carried out in actual construction due to the fact that the compensation value is too small is solved.
Further, in the method for controlling deformation of a super high-rise building structure in advance, in S6-1, a deformation difference value Δ M is calculated, and the deformation difference value Δ M ═ Δ L1-ΔL2|；
In S6-2, the constraint conditions are satisfied simultaneously:
5mm<ΔL1<10mm；
5mm<ΔL2<10mm；
2mm<ΔM<5mm。
the introduction of the deformation difference value delta M can be associated with the deformation relation among different building structures, so that the position and the compensation value of the compensation point can be more reasonably determined.
Further, in the method for pre-controlling deformation of a super high-rise building structure, specifically, in S6-2, the constraint condition further includes, and satisfies: the rate of change of internal force σ is < 5%.
Further, in the method for pre-controlling deformation of the super high-rise building structure, specifically, the first structure is a core barrel, and the second structure is an outer frame column.
Drawings
FIG. 1 is a schematic illustration of a superstructure loading model of a method of pre-controlling deformation of a super high-rise building structure of the present invention;
fig. 2 is a schematic view of an overall model of a method of pre-controlling deformation of a super high-rise building structure according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example 1:
the technical scheme of the pre-control method for deformation of the super high-rise building structure is as follows:
a method for pre-controlling deformation of a super high-rise building structure comprises the following steps:
s1, setting a guiding, measuring and leveling position in the construction process of the building structure;
and S2, performing simulation analysis on the construction process of the upper structure of the building structure, and performing first compensation on the vertical deformation of the building structure at each guiding, measuring and leveling position to obtain an upper structure load model.
According to the method for controlling the deformation of the super high-rise building structure, the guidance and measurement leveling in the construction process is considered when simulation analysis is carried out, so that the compensation value of vertical deformation is closer to the actual situation.
In a preferred embodiment, referring to fig. 1, in the method for pre-controlling deformation of a super high-rise building structure, in S2, the first compensation method is:
s2-1, calculating to obtain a vertical accumulated deformation value delta L of the building structure at the nth guiding and measuring leveling position according to simulation analysis;
s2-2, establishing a column 1, compensating to the upper part of the building structure at the nth guiding, measuring and leveling position, matching the section of the column 1 with the section of the building structure at the nth guiding, measuring and leveling position, and matching the height of the column 1 with the vertical accumulated deformation value delta L;
and S2-3, repeating S2-1 and S2-2, and completing deformation compensation of the building structure at each guiding, measuring and leveling position one by one from bottom to top.
In this embodiment, the 1 st guidance and measurement leveling position is set at the J layer of the building structure, the vertical accumulated deformation value Δ L at the J layer is calculated to be Δ J according to simulation analysis, and a column 1 is established and compensated to the upper part of the J layer of the building structure, so that the elevation of the J layer of the building structure after compensation is the same as the theoretical elevation. And then carrying out deformation compensation at the 2 nd guiding, measuring and leveling position until the deformation compensation of the building structure at each guiding, measuring and leveling position is completed.
According to the control method for the deformation of the super high-rise building structure, in the compensation process, the deformation compensation of the building structure at each guiding and leveling position is completed one by one from the 1 st guiding and leveling position from bottom to top, the error of the deformation compensation can be further reduced, and a good foundation is laid for improving the construction quality.
In a preferred embodiment, in the method for pre-controlling deformation of the super high-rise building structure, when the vertical accumulated deformation value Δ L is less than 5mm in S2-1, S2-2 is skipped. When the cumulative deformation value Δ L is too small, it is difficult to perform actual construction. Therefore, if the vertical accumulated deformation value Δ L at a certain guiding leveling position is less than 5mm, S2-2 is skipped. Thus, the vertical accumulated deformation value Δ L at the leveling position will be accumulated to the vertical accumulated deformation value Δ L at the next leveling position.
As a preferred embodiment, referring to fig. 2, the method for pre-controlling deformation of a super high-rise building structure further includes the following steps:
s3, the building structure comprises a first structure 4 and a second structure 5, in the superstructure load model, the first structure 4 is accounted for by line load, and the second structure 5 is accounted for by concentrated load;
s4, establishing a bottom plate model of the building structure, wherein the pile foundation and the foundation 3 are simulated into a spring, and the elastic coefficients of the pile foundation and the foundation 3 are determined according to a geological survey report;
s5, loading the upper structure load model into the bottom plate model to form an integral model;
and S6, performing simulation analysis on the building structure according to the integral model, and performing secondary compensation on the vertical deformation of the building structure.
The method for pre-controlling deformation of the super high-rise building structure in the embodiment considers the guiding, measuring and leveling in the construction process, and also considers the influence of different structures of the building structure and the non-uniform deformation of the bottom plate 2 on the deformation of the building structure, so that the error of deformation compensation is further reduced. In addition, the simulation analysis mode can greatly reduce the modeling workload under the condition of accurately simulating the uneven deformation of the foundation, and meanwhile, the calculation running time can also be reduced.
In a preferred embodiment, referring to fig. 2, in the method for pre-controlling deformation of a super high-rise building structure, in S6, the second compensation method is:
s6-1, calculating the vertical accumulated deformation value delta L of the first structure 4 at different heights according to the integral model1And the vertical accumulated deformation value Delta L of the second structure 52；
S6-2, establishing an optimization function, and determining a compensation position and a compensation value by taking the minimum compensation times as a target and the optimal compensation range as a constraint condition;
s6-3, calculating the position of the nth compensation point and the vertical accumulated deformation value delta L of the first structure at the position according to the optimization function1And the vertical accumulated deformation value delta L of the second structure2；
S6-4, establishing a column 1, compensating to the upper part of the building structure at the position of the nth compensation point, wherein the upper section of the column 1 is a plane, the lower section of the column 1 is matched with the upper section of the building structure at the position of the nth compensation point, the height of each surface of the column 1 is equal to the vertical accumulated deformation value delta L of the first structure1And the vertical accumulated deformation value delta L of the second structure2Matching;
and S6-5, repeating S6-3 and S6-4, and completing the position confirmation of the compensation points and the deformation compensation of the building structure at the positions of the compensation points one by one from bottom to top.
In this embodiment, the position of the 1 st compensation point is determined to be located on the i-layer of the building structure according to the optimization function, and the vertical accumulated deformation value Δ L of the first structure 4 is calculated according to the integral model when the i-layer is located1Is DeltaX and the vertical accumulated deformation value DeltaL of the second structure 52Is DeltaY; therefore, a column 1 needs to be built to compensate to the upper part of the i-layer position of the building structure, so that the elevation of the i-layer position of the building structure after compensation is the same as the theoretical elevation; and then determining the position of the 2 nd compensation point, and performing deformation compensation at the position of the 2 nd compensation point until the deformation compensation of the building structure at the position of each compensation point is completed.
According to the method for pre-controlling the structural deformation of the super high-rise building, the position and the compensation value of the compensation point can be determined more reasonably through the optimization function, and the problem that the compensation value is too small to cause incapability of operation in actual construction is solved.
In a preferred embodiment, in the method for controlling deformation of a super high-rise building structure in advance, in S6-1, a deformation difference value Δ M is further calculated, and the deformation difference value Δ M ═ Δ L1-ΔL2|；
In S6-2, the constraint conditions are satisfied simultaneously:
5mm<ΔL1<10mm；
5mm<ΔL2<10mm；
2mm<ΔM<5mm。
the introduction of the deformation difference value delta M can be associated with the deformation relation among different building structures, so that the position and the compensation value of the compensation point can be more reasonably determined.
In a preferred embodiment, in the method for pre-controlling deformation of a super high-rise building structure, specifically, in S6-2, the constraint condition further includes, while satisfying: the rate of change of internal force σ is < 5%.
In a preferred embodiment, in the method for controlling deformation of a super high-rise building structure, the first structure is a core tube, and the second structure is an outer frame column.
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. A method for pre-controlling deformation of a super high-rise building structure is characterized by comprising the following steps:
s1, setting a guiding, measuring and leveling position in the construction process of the building structure;
and S2, performing simulation analysis on the construction process of the upper structure of the building structure, and performing first compensation on the vertical deformation of the building structure at each guiding, measuring and leveling position to obtain an upper structure load model.
2. The method for pre-controlling deformation of a super high-rise building structure according to claim 1, wherein in S2, the first compensation method is:
s2-1, calculating to obtain a vertical accumulated deformation value delta L of the building structure at the nth guiding and measuring leveling position according to simulation analysis;
s2-2, building a column body, compensating to the upper part of the building structure at the nth guiding, measuring and leveling position, matching the section of the column body with the section of the building structure at the nth guiding, measuring and leveling position, and matching the height of the column body with the vertical accumulated deformation value delta L;
and S2-3, repeating S2-1 and S2-2, and completing deformation compensation of the building structure at each guiding, measuring and leveling position one by one from bottom to top.
3. The method for pre-controlling deformation of a super high-rise building structure according to claim 2, wherein in S2-1, when the vertical cumulative deformation value al is less than 5mm, S2-2 is skipped.
4. The method of pre-controlling deformation of a super high-rise building structure according to claim 2, further comprising the steps of:
s3, the building structure comprises a first structure and a second structure, in the upper structure load model, the first structure is calculated according to line load, and the second structure is calculated according to concentrated load;
s4, establishing a bottom plate model of the building structure, wherein the pile foundation and the foundation are simulated into a spring;
s5, loading the upper structure load model into the bottom plate model to form an integral model;
and S6, performing simulation analysis on the building structure according to the integral model, and performing secondary compensation on the vertical deformation of the building structure.
5. The method for pre-controlling deformation of a super high-rise building structure according to claim 4, wherein in S6, the second compensation method is:
s6-1, calculating the vertical accumulated deformation value delta L of the first structure at different heights according to the integral model1And the vertical accumulated deformation value delta L of the second structure2；
S6-2, establishing an optimization function, and determining a compensation position and a compensation value by taking the minimum compensation times as a target and the optimal compensation range as a constraint condition;
s6-3, calculating the position of the nth compensation point and the vertical accumulated deformation value delta L of the first structure at the position according to the optimization function1And the vertical accumulated deformation value delta L of the second structure2；
S6-4, a column body is built and compensated to the upper part of the building structure at the position of the nth compensation point, the upper section of the column body is a plane, the lower section of the column body is matched with the upper section of the building structure at the position of the nth compensation point, the height of each surface of the column body is equal to the vertical accumulated deformation value delta L of the first structure1And the vertical accumulated deformation value delta L of the second structure2Matching;
and S6-5, repeating S6-3 and S6-4, and completing the position confirmation of the compensation points and the deformation compensation of the building structure at the positions of the compensation points one by one from bottom to top.
6. The method for pre-controlling deformation of super high-rise building structure according to claim 5, wherein in S6-1, a deformation difference value Δ M is further calculated, and the value Δ M ═ Δ L1-ΔL2|；
In S6-2, the constraint conditions are satisfied simultaneously:
5mm<ΔL1<10mm；
5mm<ΔL2<10mm；
2mm<ΔM<5mm。
7. the method for pre-controlling deformation of a super high-rise building structure according to claim 6, wherein in S6-2, the constraint condition further includes, while satisfying: the rate of change of internal force σ is < 5%.
8. The method of pre-controlling deformation of a super high-rise building structure according to claim 4, wherein the first structure is a core barrel and the second structure is an outer frame column.
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