CN-121997680-A - Reverse correction modeling method for construction of outer frame vertical deformation difference of inner cylinder of super high-rise building

CN121997680ACN 121997680 ACN121997680 ACN 121997680ACN-121997680-A

Abstract

The invention discloses a reverse correction modeling method for construction of an outer frame vertical deformation difference of an inner cylinder of a super high-rise building, which belongs to the technical field of numerical simulation of concrete-section steel mixed structures of the super high-rise building, and comprises the following steps of step 1, establishing a finite element model according to the construction process and the time-varying characteristics of materials, step 2, monitoring deformation of the whole construction process, and obtaining a set of actual measurement relative vertical deformation difference values Step 3, based on the actual measurement relative vertical deformation difference value set And 4, carrying out reverse correction on the finite element model to obtain a corrected finite element model, and carrying out relative vertical deformation difference prediction and construction adjustment quantity guidance of the inner cylinder-outer frame in the future based on the corrected finite element model. The invention realizes the correction of the finite element model, forms a closed loop modeling and analysis flow which can be optimized iteratively, and fundamentally solves the problem of inaccurate calculation.

Inventors

LIU WEI
Lv Chaoqian
XU NING
LIU YUANCHEN
CHEN YUE
DING SHIHONG
XU HONGQIANG
CAO RUIXUE
ZHAO MINJIE
YAO DONGFANG
ZHANG SHIBAO
DING JIE
Ding Huying

Assignees

中铁四局集团有限公司
中铁四局集团有限公司创智工程科技分公司

Dates

Publication Date: 20260508
Application Date: 20260409

Claims (8)

1. The reverse correction modeling method for the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building is characterized by comprising the following steps of: step 1, establishing a finite element model according to a construction process and time-varying characteristics of materials; Step 2, deformation monitoring in the whole construction process, and obtaining a measured relative vertical deformation difference set; And 3, reversely correcting the finite element model based on the actually measured relative vertical deformation difference set to obtain a corrected finite element model, wherein the specific operation of the step 3 is as follows: Step 31, defining an objective function and a parameter to be corrected, namely setting the time-varying material parameter to be corrected as Theoretical vertical deformation difference calculated by finite element model Difference from the relative vertical deformation Minimizing the error between the two points as a correction target, and constructing an objective function; Step 32, time-varying material parameters to be corrected Performing inversion optimization processing to obtain optimal time-varying material parameters ; Step 33, inverting the obtained optimal time-varying material parameters Updating the finite element model to the time-varying material of the finite element model to obtain a corrected finite element model; And 4, predicting the relative vertical deformation difference value of the inner cylinder and the outer frame in the future and guiding the construction adjustment amount based on the corrected finite element model.
2. The reverse correction modeling method for the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building according to claim 1, wherein the specific operation of the step 1 is as follows: establishing a basic model, namely establishing a rod system model comprising structural units by utilizing finite element software according to a design drawing; step 12, simulating a construction process, namely determining the layer number difference N of the inner cylinder to be constructed earlier than the outer frame according to the running water beat of an actual construction scheme, activating the structural units layer by layer in a rod system model, and synchronously applying constant load and construction live load corresponding to the layer number difference N; And 13, embedding a material time-varying model, namely embedding a steel elastic constitutive model and a concrete time-varying characteristic constitutive model into the rod system model to obtain a finite element model.
3. The reverse correction modeling method for the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building according to claim 2, wherein the time-varying characteristic constitutive model is a CEB-FIP model, an ACI model or a GL2000 model.
4. The reverse correction modeling method for the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building according to claim 1, wherein the specific operation of the step 2 is as follows: Step 21, arranging vertical displacement monitoring equipment on a set floor of an inner cylinder shear wall and an outer frame column of the super high-rise building; step 22, starting the super high-rise building from the ground of the main body structure until the main body structure is capped, synchronously collecting absolute elevation and relative vertical deformation difference values of the inner cylinder and the outer frame according to the construction nodes Forming a set of measured relative vertical deformation difference values arranged according to the construction time nodes 。
5. The reverse correction modeling method for the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building according to claim 1 is characterized in that an objective function is specifically as follows: 。
6. The reverse correction modeling method for the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building according to claim 5, wherein the specific operation of the step 32 is as follows: Step 321, substituting the time-varying material parameter X0 to be corrected into the finite element model in step 1, and performing overall-process finite element construction simulation calculation to obtain an initial deformation value; step 322, the target modification optimization algorithm adjusts the value of the time-varying material parameter X; the target correction optimization algorithm is selected from a genetic algorithm, a simulated annealing algorithm or a PID control algorithm; Step 323, after each time of material changing parameter X adjustment, the finite element model rerun the whole process finite element construction simulation calculation to calculate new ones And corresponding objective function value ; Step 324, loop iterative computation until Converging to a preset tolerance threshold or reaching the maximum iteration number to obtain the optimal time-varying material parameter 。
7. The modeling method for reverse correction of the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building according to claim 6, wherein the time-varying material parameters comprise a creep coefficient and a shrinkage strain coefficient of a creep model.
8. The reverse correction modeling method for the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building according to claim 7, wherein the specific operation of the step 4 is as follows: step 41, predicting with high precision, namely continuously simulating a construction stage which is not performed subsequently by utilizing the corrected finite element model, and predicting a relative vertical deformation difference development curve of the inner cylinder-outer frame of the super high-rise building until the structure is capped or even completed ; Step 42, calculating construction adjustment quantity according to the predicted relative vertical deformation difference development curve of the inner cylinder and the outer frame of the super high-rise building Calculating a certain construction node in the future, and in order to counteract the relative vertical deformation difference value which will occur at the moment, the elevation compensation value which is required to be pre-applied in the current construction is calculated: And 43, performing closed-loop control, namely applying the calculated construction adjustment amount to actual construction, and simultaneously continuously executing the monitoring of the first step in subsequent construction to acquire new measured data, and repeating the steps 3 to 4 periodically or according to the need to perform re-correction and prediction update of the modified variable material parameters of the finite element model.

Description

Reverse correction modeling method for construction of outer frame vertical deformation difference of inner cylinder of super high-rise building Technical Field The invention relates to the technical field of numerical simulation of concrete-section steel mixed structures of super high-rise buildings, in particular to a reverse correction modeling method for construction of vertical deformation differences of an inner cylinder outer frame of a super high-rise building. Background The structural system of reinforced concrete inner cylinder (core cylinder) +outer frame section steel (steel tube) -concrete combined structural column is commonly adopted in the super high-rise building (the height is more than or equal to 200 m), because the core cylinder is different from the outer frame column in elastic modulus, the shrinkage creep section steel difference is obvious, meanwhile, the construction period of the super high-rise structure is long (> 18 months), the vertical load gradually increases layer by layer, the time-varying effect of concrete is obvious, and the following problems exist in the conventional method for calculating the vertical deformation difference of the inner cylinder outer frame of the super high-rise building: (1) The standard simplified algorithm only gives one-time loading estimation, and cannot reflect the real construction process, so that the deviation between the actual measurement value and the calculated value of the vertical deformation difference of the inner cylinder and the outer frame after the structure is completed is larger, and the systematic faults of curtain walls, elevator guide rails and electromechanical pipelines are caused; (2) Although the finite element software calculation can activate the units layer by layer, the material parameters (creep, shrinkage, elastic modulus and the like) still take a constant value according to a standard table, and the on-site measured data cannot be utilized for reverse correction, so that the method belongs to open-loop prediction, and has insufficient precision and robustness. Based on the method, the reverse correction modeling method for the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building is designed to adapt to complex and changeable dynamic environments and meet the actual application demands. Disclosure of Invention Aiming at the defects of inaccurate calculation, incapacitation and no use of the conventional calculation method of the outer frame vertical deformation difference of the inner barrel of the super high-rise building in the prior art, the invention provides a reverse correction modeling method for the outer frame vertical deformation difference construction of the inner barrel of the super high-rise building. In order to achieve the above purpose, the invention is realized by the following technical scheme: the reverse correction modeling method for the construction of the outer frame vertical deformation difference of the inner barrel of the super high-rise building comprises the following steps: step 1, establishing a finite element model according to a construction process and time-varying characteristics of materials; Step 2, deformation monitoring in the whole construction process, and obtaining a measured relative vertical deformation difference set ; Step 3, based on the actual measurement relative vertical deformation difference value setAnd (3) carrying out reverse correction on the finite element model to obtain a corrected finite element model, wherein the specific operation of the step (3) is as follows: Step 31, defining an objective function and a parameter to be corrected, namely setting the time-varying material parameter to be corrected as Theoretical vertical deformation difference calculated by finite element modelDifference from the relative vertical deformationMinimizing the error between the two points as a correction target, and constructing an objective function; Step 32, time-varying material parameters to be corrected Performing inversion optimization processing to obtain optimal time-varying material parameters; Step 33, inverting the obtained optimal time-varying material parametersUpdating the finite element model to the time-varying material of the finite element model to obtain a corrected finite element model; And 4, predicting the relative vertical deformation difference value of the inner cylinder and the outer frame in the future and guiding the construction adjustment amount based on the corrected finite element model. Further, the specific operation of step 1 is as follows: establishing a basic model, namely establishing a rod system model comprising structural units by utilizing finite element software according to a design drawing; step 12, simulating a construction process, namely determining the layer number difference N of the inner cylinder to be constructed earlier than the outer frame according to th