CN-121973137-A - Jig frame device of prestressed steel bent cap and adjusting method

CN121973137ACN 121973137 ACN121973137 ACN 121973137ACN-121973137-A

Abstract

The invention relates to the field of bridge manufacturing and transportation and discloses a jig frame device and an adjusting method of a prestress steel bent cap, wherein the jig frame device comprises a plurality of supporting units which are respectively in communication connection with a control unit, each supporting unit comprises a supporting part and a vertical supporting structure, the supporting parts are connected to the vertical supporting structure in an up-down adjustable mode, a displacement detection assembly is arranged on the corresponding supporting units, a pressure detection assembly is arranged on the supporting parts and feeds pressure signals back to the control unit, and the control unit calculates target adjusting quantity for adjusting each supporting part by taking line type error minimization and pressure equalization of each supporting point of the steel bent cap when the supporting units are cooperatively supported as optimization targets based on a preset optimization algorithm model. The invention has the beneficial effects of improving the linear precision of the steel bent cap, effectively guaranteeing the forming quality, ensuring that each supporting point is uniformly stressed, avoiding local overload or instability, improving the construction safety and the structural reliability and improving the construction efficiency.

Inventors

ZHAO TAO
ZHAO CHENYANG
YANG HONG
LIU LEI
YUE XIAO
WENG XUESONG
ZHANG LIN

Assignees

四川省钢构智造有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. A jig frame device for a prestressed steel bent cap, comprising: The support units are respectively in communication connection with the control unit and are used for vertically supporting the steel bent cap at a plurality of positions, each support unit comprises a support part and a vertical support structure, and the support parts are connected to the vertical support structures in an up-and-down adjustable manner; the displacement detection assembly is arranged on the corresponding supporting unit and feeds back the height signal of the supporting part monitored in real time to the control unit; the pressure detection assembly is arranged on the supporting part and is used for detecting the load born by the corresponding supporting unit in real time and feeding back a pressure signal to the control unit; The control unit calculates a target adjustment amount for adjusting each supporting part by taking the linear error minimization and the pressure equalization of each supporting point of the steel bent cap when the supporting units cooperatively support as optimization targets based on a preset optimization algorithm model.
2. The jig frame device of the prestressed steel bent cap according to claim 1, wherein each supporting unit further comprises a bottom plate, the bottom plate is connected to a ground tire, the upper end of the bottom plate is connected with a column, the column forms the vertical supporting structure, a mounting seat is mounted at the upper end of the column, the supporting portion comprises a stud, a threaded through hole is formed in the mounting seat, and the stud is screwed with the threaded through hole and can move along an inner hole of the column.
3. The jig frame device of the prestressed steel bent cap according to claim 2, wherein the pressure detecting assembly comprises a cylindrical pressure sensor and a mounting plate, the mounting plate is connected to the top end of the stud, the cylindrical pressure sensor is connected to the top of the mounting plate, a protecting sleeve is further installed on the top of the mounting plate, the cylindrical pressure sensor is located on the inner side of the protecting sleeve, a top end cover of the protecting sleeve is provided with a buffer pad, and the buffer pad is in contact with the top end of the cylindrical pressure sensor.
4. The jig frame device of the prestressed steel bent cap according to claim 2, wherein the displacement detection assembly comprises a magnetostrictive displacement sensor and a magnetic ring, the magnetostrictive displacement sensor is fixedly installed at the lower section of the inner hole of the upright post along the vertical direction, and the magnetic ring is sleeved at one end of the stud far away from the supporting part.
5. The jig frame assembly of the prestressed steel bent cap of claim 2, further comprising a lock nut screwed with the stud and abutted against an upper end of the mount.
6. The jig frame device of the prestressed steel bent cap of claim 2, further comprising a wrench part provided at an upper section of the stud, the wrench part having a polygonal plate shape.
7. A method of adjustment, characterized in that it is carried out on the basis of a jig frame device of a prestressed steel cap beam according to any one of claims 1-6, comprising the steps of: The data acquisition step comprises the step of acquiring pressure data of each supporting unit in real time through a cylindrical pressure sensor and a magnetostriction displacement sensor of each supporting unit And height data ; The optimization calculation step is that the control unit uses the collected pressure data And height data As the initial state of algorithm input, based on the pre-stored steel bent cap target design line type, running an optimization algorithm, taking the minimized predicted line type deviation and the optimized predicted pressure distribution as targets, and solving the target height adjustment quantity of each supporting point which enables the comprehensive optimization target to be optimal ; An adjustment execution step of adjusting the amount according to the calculated target height The control unit outputs adjustment instruction information to adjust the studs in each supporting unit so as to adjust the supporting parts to the corresponding target heights; a closed loop verification step, namely returning to the data acquisition step to acquire data again after the adjustment execution step is executed, and repeating the optimization calculation step and the adjustment execution step until the current height data are obtained Deviation of the characterized actual line shape from the target design line shape, and the current pressure data of each supporting point The balance degree of the system meets the preset precision requirement.
8. The adjustment method according to claim 7, wherein the optimization algorithm in the optimization calculation step is a genetic algorithm, the genetic algorithm comprising the steps of: s1, adjusting the target height of each supporting part As an optimization variable and to take the current pressure data And current height data Setting iteration times of a genetic algorithm and the number of individuals to be solved in each generation of population as initial input; S2, establishing a height adjustment optimal configuration model, wherein the height adjustment optimal configuration model comprises an objective function and a total constraint condition, and the objective function is as follows: ; Wherein, the As a function of the line-type error, As a function of the pressure equalization, In order to adjust the function of the efficiency, For the linear type of precision weight, In order to support the stabilizing weight, In order for the construction efficiency to be weighted, 、 And Are all configured to be the smaller and the better the numerical value is; S3, target height adjustment amount for each supporting part Coding to obtain coding values of individuals to be solved, randomly generating an initial population formed by a plurality of individuals to be solved based on total constraint conditions, enabling the initial population to be a parent population, enabling the individuals to be solved in the parent population to be parent individuals, wherein the coding values of the parent individuals comprise target height adjustment values of each supporting part ; S4, taking the coding values of each individual of the parent population into a height adjustment simulation system to perform height simulation, and obtaining a set of actual height values required to be adjusted by each supporting part, wherein the set of actual height values is a simulation result of the height adjustment simulation; S5, calculating an objective function value of each individual in the parent population according to each simulation result, and then calculating and sequencing an fitness value of each individual in the parent population according to a fitness function; S6, saving the first M parent individuals with the maximum fitness value in the parent population, selecting parent individuals from all the parent individuals except the first M parent individuals with the maximum fitness value through roulette to perform cross mutation operation to obtain child individuals, calculating fitness values of the child individuals after cross mutation, sequencing, reinserting the child individuals into the parent population according to the fitness values, selecting a set number of individuals to be solved to form a new parent population, and returning to S4; S7, repeating the steps S4-S6 until the iteration times or the objective function value is within a specified threshold range, wherein the obtained parent population is the feasible solution set, and the parent individuals in the parent population are the feasible individuals.
9. The adjustment method according to claim 8, characterized in that in step S2 The total number of the components is 0.5, The total number of the components is 0.3, 0.2.
10. The adjustment method according to claim 8, characterized in that the fitness function is: 。

Description

Jig frame device of prestressed steel bent cap and adjusting method Technical Field The invention relates to the field of bridge manufacturing and transportation, in particular to a jig frame device of a prestressed steel bent cap and an adjusting method. Background In the manufacturing process of large-scale steel structures such as prestressed steel bent caps, the jig frame is used as a key tool for supporting and positioning, and the accuracy and the adaptability of the jig frame directly influence the linear quality and the construction efficiency of the components. The existing jig frame device has the defects that firstly, the structure is fixed, the height is not adjustable, the height change caused by welding deformation, structural dead weight or design change cannot be responded dynamically, the elevation deviation of a supporting point is easy to cause, repeated reworking correction is needed, secondly, the adjustment process depends on manual operation and experience judgment, the cooperative optimization control of multiple supporting points is difficult to realize, and particularly in complex linear or large-span bent cap construction, the linear precision, the supporting stability and the construction efficiency are difficult to be simultaneously considered, so that the development of bridge manufacture to the intelligent and lean directions is restricted. Disclosure of Invention The invention aims to provide a jig frame device and an adjusting method for a prestress steel bent cap, which are used for improving the linear precision of the steel bent cap, effectively guaranteeing the forming quality, ensuring that each supporting point is stressed uniformly, avoiding local overload or instability, improving the construction safety and structural reliability and improving the construction efficiency. The invention is realized by the following technical scheme: The jig frame device of the prestressed steel cap beam comprises a plurality of supporting units which are respectively in communication connection with a control unit and are used for vertically supporting the steel cap beam at a plurality of positions, each supporting unit comprises a supporting part and a vertical supporting structure, the supporting parts are connected to the vertical supporting structure in an up-down adjustable mode, a displacement detection assembly is arranged on the corresponding supporting units and feeds back a height signal of the supporting parts monitored in real time to the control unit, a pressure detection assembly is arranged on the supporting parts and is used for detecting loads born by the corresponding supporting units in real time and feeding back pressure signals to the control unit, and the control unit calculates a target adjustment quantity for adjusting each supporting part based on a preset optimization algorithm model by taking line type error minimization and pressure equalization of each supporting point of the steel cap beam when the supporting units are supported cooperatively. The invention has the beneficial effects that as the cooperative control system consisting of a plurality of supporting units capable of being adjusted independently, an integrated displacement and pressure detection assembly and a control unit with an internal optimization algorithm is adopted, accurate data support is provided for the system through the independent adjustable structure of each supporting unit and a double-path sensor, the overall optimal adjustment scheme can be calculated automatically through the control unit by fusing the height and pressure data of all supporting points in real time and operating the optimization algorithm aiming at line type error minimization and pressure equalization, the line type accuracy of the steel bent cap is improved instead of manual trial and error and experience judgment, the forming quality is effectively ensured, the stress of each supporting point is uniform through cooperative control of force and position, the local overload or instability is avoided, the construction safety and the structural reliability are improved, the time for repeated measurement and adjustment is greatly reduced, the construction efficiency is remarkably improved, and the invention is particularly suitable for manufacturing the bent cap under complex working conditions such as large span, variable curvature and the like. In some embodiments, each supporting unit further comprises a bottom plate, the bottom plate is connected to the ground tire, the upper end of the bottom plate is connected with a stand column, the stand column forms the vertical supporting structure, the upper end of the stand column is provided with a mounting seat, the supporting part comprises a stud, the mounting seat is provided with a threaded through hole, and the stud is in threaded engagement with the threaded through hole and can move along an inner hole of the stand column. Through setting up the supportin