CN112597561B - 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 ensure that the determination of the compensation regulation value of the vertical deformation is closer to the actual situation, the control of the super high-rise construction quality is better realized, and the operation in the aspect of compensation implementation is more convenient, the invention provides a pre-control method for the deformation of the super high-rise building structure. The technical scheme of the pre-control method for the deformation of the super high-rise building structure is as follows: s1, setting a guiding and leveling position in the construction process of a building structure; 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 and measuring 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 pre-control method for deformation of a super high-rise building structure.
Background
Due to the fact that the number of layers is large and 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 also increased. Meanwhile, since concrete has shrinkage creep characteristics, vertical deformation also increases with time. The super high-rise core tube adopts a reinforced concrete structure, and the peripheral frame column adopts a profile steel concrete structure. The difference of the two structural systems causes the difference of the integral elastic modulus, and the core tube and the frame column cause the difference of the deformation of the core tube and the frame under the actions of load, concrete shrinkage creep and the like, thereby forming the deformation difference. The core tube self deformation and the tube column differential deformation have influence on the safety and quality of the structural elevation, the curtain wall, the electromechanical pipelines, the floor levelness, the structural members and the like.
In order to eliminate various influences caused by deformation, pre-deformation control is needed in the super high-rise construction process. The general idea of the current pre-deformation control is that deformation and differential deformation values are obtained through calculation, and then the calculated deformation values are compensated to the original design elevation according to a certain rule during structural construction.
The method adopted by the current pre-deformation control from calculation and pre-control measures mainly has the following problems:
1. computational aspects
The current super high-rise deformation calculation is completed by adopting finite elements, and accurate simulation of the whole process is adopted, but many 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 elevation can be checked once at intervals of construction units so as to ignore the existing errors, namely, the construction completion height is guided and leveled. The elevation through the guiding and leveling ignores the influence of vertical deformation, if the guiding and leveling in the construction process is not considered, the calculated vertical deformation and the difference deformation are obviously larger than the actual deformation, which is why a plurality of scholars calculate that the super high-rise vertical deformation value is smaller than the actual measurement value.
In addition, when the differential deformation of the core tube and the peripheral frame columns is calculated, the structure and the foundation are not considered as a whole, the influence of the foundation deformation on the differential deformation is not considered, although the thickness of the super high-rise foundation bottom plate reaches several meters, the bottom plate can be in a concave shape because the weight of the core tube is far higher than that of the peripheral frame columns, and the central position deformation is larger than that of the peripheral frame columns, so that the differential deformation of the core tube and the peripheral frame columns is aggravated.
2. Aspect of pre-deformation control measures
(1) The method calculates the deformation value of each layer by each layer of regulation and control method, and then accurately compensates each layer, and the method is the most accurate in theory, and because the compensation value of each layer is very small and is mostly smaller than 1mm, the accurate compensation regulation and control cannot be realized in reality in consideration of construction conditions, and therefore, the scheme is limited to theory and cannot be realized in reality.
(2) The method is simple to calculate, and the construction is simpler in theory because the same compensation value is adopted in each layer in the same construction section. The method is the same as the first method, and is theoretically feasible, but cannot be implemented in actual construction.
(3) The top of the construction section is compensated once, and the method is different from the method (2) in that the compensation value of each floor in the construction section is compensated centrally at the top of the construction section. The method is a method commonly adopted in construction. However, the construction section division of the method is random, and the vertical deformation and differential deformation rules of the super high-rise building are not considered.
Disclosure of Invention
In order to ensure that the determination of the compensation regulation value of the vertical deformation is closer to the actual situation, the control of the super high-rise construction quality is better realized, and the operation in the aspect of compensation implementation is more convenient, the invention provides a pre-control method for the deformation of the super high-rise building structure.
The technical scheme of the pre-control method for the deformation of the super high-rise building structure is as follows:
a pre-control method for deformation of super high-rise building structure comprises the following steps:
s1, setting a guiding and leveling position in the construction process of a building structure;
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 and measuring leveling position to obtain an upper structure load model.
According to the pre-control method for the deformation of the super high-rise building structure, in the simulation analysis, the measurement leveling in the construction process is considered, so that the compensation value of the vertical deformation is more approximate to the actual situation.
Further, in the pre-control method for deformation of the super high-rise building structure, in S2, the method of first compensation is as follows:
s2-1, calculating to obtain a vertical accumulated deformation value delta L of the building structure at the nth guiding and leveling position according to simulation analysis;
s2-2, establishing a column body, compensating to the upper part of the building structure at the nth guiding and leveling position, wherein the section of the column body is matched with the section of the building structure at the nth guiding and leveling position, and the height of the column body is matched with a vertical accumulated deformation value delta L;
s2-3, repeating the steps S2-1 and S2-2, and completing deformation compensation of the building structure at each guiding and leveling position one by one from bottom to top.
According to the pre-control method for 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 from bottom to top one by one 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.
In the pre-control method for deformation of the super high-rise building structure, in S2-1, when the vertical accumulated deformation value delta L is smaller than 5mm, S2-2 is skipped. When the cumulative deformation value Δl is too small, it is difficult to perform the actual construction. Therefore, if the vertical integrated deformation value DeltaL at a certain guiding leveling position is smaller than 5mm, S2-2 is skipped. Thus, the vertical accumulated deformation value delta L at the guiding and leveling position is accumulated into the vertical accumulated deformation value delta L at the next measuring and leveling position.
Further, the pre-control method for 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, wherein in the upper structure load model, the first structure calculates according to linear load, and the second structure calculates according to concentrated load;
s4, establishing a bottom plate model of the building structure, wherein pile foundations and foundations are simulated into springs, and the elastic coefficients of the pile foundations and the foundations are determined according to a geological survey report;
s5, loading the upper structure load model into a bottom plate model to form an integral model;
s6, performing simulation analysis on the building structure according to the integral model, and performing second compensation on the vertical deformation of the building structure.
The pre-control method for deformation of the super high-rise building structure not only considers the measurement and leveling in the construction process, but also considers the influence of different structures of the building structure and the uneven 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 modeling workload under the condition of accurately simulating uneven deformation of the foundation, and can also reduce calculation running time.
Further, in the pre-control method for deformation of the super high-rise building structure, in S6, the method for second compensation is as follows:
s6-1, calculating a vertical accumulated deformation value delta L of the first structure at different heights according to the integral model 1 And a second structure vertical integrated deformation value DeltaL 2 ；
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 first structure vertical accumulated deformation value delta L of the position according to the optimization function 1 Vertical accumulated deformation value delta L of second structure 2 ；
S6-4, establishing a column body, compensating to the upper part of the building structure at the position of the nth compensation point, wherein 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, and the height on each surface of the column body is equal to the vertical accumulated deformation value delta L of the first structure 1 And a second structure vertical integrated deformation value DeltaL 2 Matching;
s6-5, repeating S6-3 and S6-4, and completing position confirmation of the compensation points and deformation compensation of the building structure at the positions of the compensation points one by one from bottom to top.
According to the pre-control method for the deformation of the super high-rise building structure, the compensation point position and the compensation value can be more reasonably determined through the optimization function, and the problem that the actual construction cannot be operated due to the fact that the compensation value is too small is avoided.
Further, in the pre-control method for deformation of the super high-rise building structure, in S6-1, a deformation difference value Δm is also calculated, where the deformation difference value Δm= |Δl 1- ΔL 2 |；
In S6-2, the constraint conditions are simultaneously satisfied:
5mm<ΔL 1 <10mm；
5mm<ΔL 2 <10mm；
2mm<ΔM<5mm。
the introduction of the deformation difference value delta M can be used for correlating deformation relations among different building structures, so that the compensation point position and the compensation value can be determined more reasonably.
Further, in the pre-control method for deformation of the super high-rise building structure, specifically, in S6-2, the constraint condition further includes that: the internal force change rate sigma <5%.
In the pre-control method for deformation of the super high-rise building structure, the first structure is a core tube, and the second structure is an outer frame column.
Drawings
FIG. 1 is a schematic illustration of a superstructure load model of a pre-control method of super high rise building structure deformation of the present invention;
fig. 2 is a schematic diagram of an overall model of a pre-control method for 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 drawings and the specific examples. Advantages and features of the invention will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
Example 1:
the technical scheme of the pre-control method for deformation of the super high-rise building structure of the embodiment is as follows:
a pre-control method for deformation of super high-rise building structure comprises the following steps:
s1, setting a guiding and leveling position in the construction process of a building structure;
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 and measuring leveling position to obtain an upper structure load model.
According to the pre-control method for the deformation of the super high-rise building structure, in the simulation analysis, the measurement leveling in the construction process is considered, so that the compensation value of the vertical deformation is more approximate to the actual situation.
As a preferred embodiment, referring to fig. 1, in the method for pre-controlling deformation of the super high-rise building structure, in S2, the method for first compensation is as follows:
s2-1, calculating to obtain a vertical accumulated deformation value delta L of the building structure at the nth guiding and leveling position according to simulation analysis;
s2-2, a column body 1 is established, the upper part of the building structure at the nth guiding and leveling position is compensated, the section of the column body 1 is matched with the section of the building structure at the nth guiding and leveling position, and the height of the column body 1 is matched with a vertical accumulated deformation value delta L;
s2-3, repeating the steps S2-1 and S2-2, and completing deformation compensation of the building structure at each guiding and leveling position one by one from bottom to top.
In this embodiment, the 1 st guiding and leveling position is set at the J-layer of the building structure, the vertical accumulated deformation value Δl at the J-layer is calculated as Δj according to simulation analysis, a column 1 is built and compensated to the upper part of the J-layer of the building structure, so that the elevation of the compensated J-layer of the building structure is the same as the theoretical elevation. And then carrying out deformation compensation at the 2 nd guiding and leveling positions until the deformation compensation of the building structure at each guiding and leveling position is completed.
In the pre-control method for 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 from bottom to top one by one 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.
In the method for pre-controlling the deformation of the super high-rise building structure, in S2-1, when the vertical accumulated deformation value DeltaL is smaller than 5mm, S2-2 is skipped. When the cumulative deformation value Δl is too small, it is difficult to perform the actual construction. Therefore, if the vertical integrated deformation value DeltaL at a certain guiding leveling position is smaller than 5mm, S2-2 is skipped. Thus, the vertical accumulated deformation value delta L at the guiding and leveling position is accumulated into the vertical accumulated deformation value delta L at the next measuring and leveling position.
As a preferred embodiment, referring to fig. 2, the method for pre-controlling the deformation of the super high-rise building structure further includes the following steps:
s3, the building structure comprises a first structure 4 and a second structure 5, wherein in the upper structure load model, the first structure 4 calculates according to linear load, and the second structure 5 calculates according to concentrated load;
s4, building a bottom plate model of the building structure, wherein pile foundations and foundations 3 are simulated into springs, and the elastic coefficients of the pile foundations and the foundations 3 are determined according to a geological survey report;
s5, loading the upper structure load model into a bottom plate model to form an integral model;
s6, performing simulation analysis on the building structure according to the integral model, and performing second compensation on the vertical deformation of the building structure.
The pre-control method for deformation of the super high-rise building structure of the embodiment considers different structures of the building structure and the influence of uneven deformation of the bottom plate 2 on the deformation of the building structure besides the measurement and leveling in the construction process, thereby further reducing the error of deformation compensation. In addition, the simulation analysis mode can greatly reduce modeling workload under the condition of accurately simulating uneven deformation of the foundation, and can also reduce calculation running time.
As a preferred embodiment, referring to fig. 2, in the method for pre-controlling deformation of the super high-rise building structure, in S6, the method for second compensation is as follows:
s6-1, calculating a vertical accumulated deformation value delta L of the first structure 4 at different heights according to the integral model 1 And a second structure 5 vertical integrated deformation value Δl 2 ；
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 first structure vertical accumulated deformation value delta L of the position according to the optimization function 1 Vertical accumulated deformation value delta L of second structure 2 ；
S6-4, a column body 1 is established, the upper part of the building structure at the position of the nth compensation point is compensated, the upper section of the column body 1 is a plane, the lower section of the column body 1 is matched with the upper section of the building structure at the position of the nth compensation point, and the height on each surface of the column body 1 is equal to the vertical accumulated deformation value delta L of the first structure 1 And a second structure vertical integrated deformation value DeltaL 2 Matching;
s6-5, repeating S6-3 and S6-4, and completing position confirmation of the compensation points and 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 at the i-layer of the building structure according to the optimization function, and the i-layer is calculated according to the overall model, and when the i-layer is calculated, the first structure 4 vertically accumulates the deformation value Δl 1 For DeltaX, and the second structure 5 vertical cumulative deformation DeltaL 2 Is delta Y; then, we need to build a column 1 to compensate to the upper part of the i layer of the building structure, so that the elevation of the i layer of the building structure after compensation is the same as the theoretical elevation; then the position of the 2 nd compensation point is determined, and the deformation compensation at the 2 nd compensation point position is carried out until the deformation compensation of the building structure at each compensation point position is completed.
According to the pre-control method for the deformation of the super high-rise building structure, the compensation point position and the compensation value can be more reasonably determined through the optimization function, and the problem that the actual construction cannot be operated due to the fact that the compensation value is too small is avoided.
In a preferred embodiment, in the method for pre-controlling deformation of the super high-rise building structure, in S6-1, a deformation difference value Δm is also calculated, where Δm= |Δl is the deformation difference value 1 -ΔL 2 |；
In S6-2, the constraint conditions are simultaneously satisfied:
5mm<ΔL 1 <10mm；
5mm<ΔL 2 <10mm；
2mm<ΔM<5mm。
the introduction of the deformation difference value delta M can be used for correlating deformation relations among different building structures, so that the compensation point position and the compensation value can be determined more reasonably.
In a preferred embodiment, in the method for pre-controlling deformation of the super high-rise building structure, specifically, in S6-2, the constraint condition further includes that: the internal force change rate sigma <5%.
In a preferred embodiment, in the method for pre-controlling deformation of the 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 illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (5)
1. The pre-control method for the deformation of the super high-rise building structure is characterized by comprising the following steps of:
s1, setting a guiding and leveling position in the construction process of a building structure;
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 and leveling position to obtain an upper structure load model;
in S2, the first compensation method is as follows:
s2-1, calculating to obtain a vertical accumulated deformation value delta L of the building structure at the nth guiding and leveling position according to simulation analysis;
s2-2, establishing a column body, compensating to the upper part of the building structure at the nth guiding and leveling position, wherein the section of the column body is matched with the section of the building structure at the nth guiding and leveling position, and the height of the column body is matched with a vertical accumulated deformation value delta L;
s2-3, repeating the steps S2-1 and S2-2, and completing deformation compensation of the building structure at each guiding and leveling position one by one from bottom to top;
s3, the building structure comprises a first structure and a second structure, wherein in the upper structure load model, the first structure calculates according to linear load, and the second structure calculates according to concentrated load;
s4, building a bottom plate model of the building structure, wherein pile foundations and foundations are simulated into springs;
s5, loading the upper structure load model into a bottom plate model to form an integral model;
s6, performing simulation analysis on the building structure according to the integral model, and performing second compensation on the vertical deformation of the building structure;
in S6, the second compensation method is as follows:
s6-1, calculating a vertical accumulated deformation value delta L of the first structure at different heights according to the integral model 1 And a second structure vertical integrated deformation value DeltaL 2 ；
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 first structure vertical accumulated deformation value delta L of the position according to the optimization function 1 Vertical accumulated deformation value delta L of second structure 2 ；
S6-4, establishing a column body, compensating to the upper part of the building structure at the position of the nth compensation point, wherein 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, and the height on each surface of the column body is equal to the vertical accumulated deformation value delta L of the first structure 1 And a secondVertical integrated deformation value delta L of structure 2 Matching;
s6-5, repeating S6-3 and S6-4, and completing position confirmation of the compensation points and deformation compensation of the building structure at the positions of the compensation points one by one from bottom to top.
2. The method for pre-controlling deformation of super high-rise building structure according to claim 1, wherein in S2-1, when the vertical integrated deformation value Δl is smaller than 5mm, S2-2 is skipped.
3. The method for pre-controlling deformation of super high-rise building structure according to claim 1, wherein in S6-1, a deformation difference Δm is also calculated, the deformation difference Δm= |Δl 1- ΔL 2 |；
In S6-2, the constraint conditions are simultaneously satisfied:
5mm<ΔL 1 <10mm；
5mm<ΔL 2 <10mm；
2mm<ΔM<5mm。
4. the method for pre-controlling deformation of a super high-rise building structure according to claim 1, wherein in S6-2, the constraint condition further comprises simultaneously satisfying: the internal force change rate sigma <5%.
5. The method for pre-controlling deformation of a super high-rise building structure according to claim 1, wherein the first structure is a core tube and the second structure is an outer frame column.
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