A general balanced beam design method, beam and system

Abstract

This invention provides a universal balanced lifting beam design method, lifting beam, and system. The method includes the following steps: obtaining lifting parameters for at least two types of precast concrete (PC) beams; defining an initial structural model of the lifting beam, with two second lifting points on the upper part of the beam, the distance between the two second lifting points relative to the center of the beam being a design variable; distributing the total weight of the PC beam to a preset first lifting point, forming a load condition acting on the lower part of the beam; establishing a bending moment distribution model of the beam under different second lifting point spacings; using the absolute values ​​of the maximum positive bending moment and the maximum negative bending moment borne by the beam as the optimization objective, solving for the optimization results of the second lifting points; determining the fixed spacing of the second lifting points of the beam based on the optimization results of each PC beam load condition; calculating the actual control bending moment of the beam under each load condition, using the maximum value of the actual control bending moment as the design reference bending moment; and generating a universal balanced lifting beam structure. This method enables the safe coverage of multiple PC beam lifting needs with a single universal lifting beam, ensuring safety.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated construction technology in building engineering, and specifically relates to a general balanced lifting beam design method, lifting beam and system. Background Technology

[0002] In prefabricated building construction, the hoisting of precast concrete beams, slabs, and other components (collectively referred to as PC components) is a critical process. Due to the varying dimensions, weights, and pre-designed hoisting point specifications of PC components, the number, spacing, and distribution of these hoisting points often differ. Furthermore, to achieve overall load-bearing capacity, many PC beams have post-cast strips for main or secondary beams. These strips divide a single PC beam into several independently precast segments, meaning that hoisting points can only be placed on these structurally intact segments. Consequently, the distribution of hoisting points is discontinuous, grouped, and varies with the beam type.

[0003] In existing technologies, lifting beam designs are mostly based on simplified models with uniform or symmetrical distribution of lifting points, failing to fully consider the constraints of non-uniform distribution of lifting points caused by post-cast strips. Therefore, when designing general lifting beams for this type of PC beam, it is difficult to accurately assess the internal forces of the lifting beam under various lifting point arrangement modes, especially to determine the most unfavorable lifting condition that will produce the maximum design internal force, thus failing to achieve a balance between safety and economy. Summary of the Invention

[0004] This invention provides a universal balanced lifting beam design method, lifting beam and system, which enables the safe coverage of various PC beam lifting needs with a single universal lifting beam, while ensuring safety and economy.

[0005] The technical solution of the present invention is as follows: A general method for designing a balanced lifting beam includes the following steps: S1: Obtain at least two types of lifting parameters for PC beams, including the total weight of each PC beam, segment distribution information, and the position information of the first lifting point on each segment; S2: Define the initial structural model of the lifting beam. The lifting beam is a symmetrical structure with two second lifting points on its upper part for connecting with lifting equipment. The distance between the two second lifting points and the center of the lifting beam is a design variable. S3: For each PC beam, the total weight of the PC beam is distributed to the preset first lifting point according to the lifting parameters, forming a load case acting on the lower part of the lifting beam; establish a bending moment distribution model of the lifting beam under different second lifting point spacings; with the absolute value of the maximum positive bending moment and the maximum negative bending moment borne by the lifting beam being equal as the optimization objective, solve the optimization results of the second lifting point corresponding to each PC beam load case; S4: Determine the fixing spacing of the second lifting point of the lifting beam based on the optimization results of each PC beam working condition; S5: Using the second fixed spacing of the lifting points, stress analysis is performed on each PC beam working condition, the actual control bending moment of the lifting beam under each working condition is calculated, and the maximum value of the actual control bending moment under each working condition is used as the design reference bending moment. S6: Based on the design reference bending moment, generate a universal balanced lifting beam structure that safely covers all PC beam working conditions.

[0006] Furthermore, in the general balanced lifting beam design method, in step S3, the optimization result of the second lifting point is obtained by solving the following optimization equation: |M pos (a)∣=∣M neg (a)∣;where a is the distance between the two second suspension points, M pos (a) represents the maximum positive bending moment of the lifting beam, M. neg (a) represents the maximum negative bending moment of the suspension beam.

[0007] Furthermore, in the general balanced lifting beam design method, in step S4, the second lifting point fixed spacing is selected as the statistical characteristic value of the second lifting point optimization result corresponding to each PC beam working condition.

[0008] Furthermore, in the general balanced lifting beam design method, the statistical characteristic value is any one of the median, arithmetic mean, weighted average, and geometric mean.

[0009] Furthermore, in the general balanced lifting beam design method, step S5 further includes identifying the corresponding PC beam working condition that generates the design reference bending moment, and marking the working condition as the most unfavorable control working condition.

[0010] Furthermore, in the general balanced lifting beam design method, step S6 further includes cross-sectional design, strength verification, stiffness verification, and overall stability verification of the lifting beam.

[0011] Furthermore, in the general balanced lifting beam design method, step S3 is used to achieve: for PC beams of different specifications with different first lifting point distributions, obtaining the second lifting point position that optimizes the material utilization efficiency of the lifting beam section.

[0012] Furthermore, in the general balanced lifting beam design method, steps S4 and S5 are used to achieve the following: under the premise of sacrificing the individual optimality of each working condition, by unifying the position of the second lifting point and performing envelope analysis, the most unfavorable control condition that has envelope significance for all working conditions is identified.

[0013] A universal balance lifting beam is designed using the aforementioned universal balance lifting beam design method.

[0014] A universal balanced lifting beam design system, comprising: The data acquisition module is used to acquire at least two types of lifting parameters for PC beams. The lifting parameters include the total weight of each PC beam, segment distribution information, and the preset first lifting point position information on each segment. The model definition module, connected to the data acquisition module, is used to define the initial structural model of the lifting beam. The lifting beam is a symmetrical structure with two second lifting points on its upper part for connection with lifting equipment. The distance between the two second lifting points and the center of the lifting beam is a design variable. The optimization calculation module, connected to the model definition module, is used to distribute the total weight of the PC beam to the preset first lifting point for each PC beam's lifting parameters, forming a load case acting on the lower part of the lifting beam; establish a bending moment distribution model of the lifting beam under different second lifting point spacings; and use the absolute values ​​of the maximum positive bending moment and the maximum negative bending moment borne by the lifting beam as the optimization objective to solve for the second lifting point optimization results corresponding to each PC beam load case. A general parameter determination module, connected to the optimization calculation module, is used to determine the fixed spacing of the second lifting point of the lifting beam based on the optimization results of each PC beam working condition. The envelope verification module, connected to the general parameter determination module, is used to perform stress analysis on each PC beam working condition using the second fixed spacing of the lifting points, calculate the actual control bending moment of the lifting beam under each working condition, and use the maximum value of the actual control bending moment under each working condition as the design reference bending moment. The lifting beam generation module, connected to the envelope verification module, is used to generate a universal balanced lifting beam structure that safely covers all PC beam working conditions based on the design reference bending moment.

[0015] The beneficial effects of this invention are as follows: The present invention provides a universal balanced lifting beam design method. By optimizing the lifting points, unifying the lifting point positions and envelope analysis for various PC beam specifications, a single lifting beam can safely cover all PC beam lifting conditions. This effectively solves the problems of cumbersome lifting beam configuration and poor versatility for lifting multiple PC beam models, significantly reducing construction costs, improving lifting efficiency and ensuring lifting safety.

[0016] This general balanced lifting beam design method obtains the segmental distribution information and first lifting point location information of each PC beam. In the single-condition optimization step, it performs load distribution and bending moment modeling based on the actual lifting point location, rather than adopting the traditional uniform or symmetrical distribution assumption. It accurately calculates the internal force distribution of the lifting beam under various non-uniform lifting point arrangement modes, providing an accurate basis for subsequent optimization and verification.

[0017] This universal balanced lifting beam design method further unifies the theoretical optimal position for each working condition into a fixed spacing. Using this fixed spacing, stress analysis is performed on each working condition to calculate the actual bending moment and take the maximum value. This mechanism can automatically identify the most unfavorable control condition that generates the maximum design bending moment, avoiding the risk of omissions that may occur with manual judgment and ensuring the full safety of the lifting beam design.

[0018] This universal balanced lifting beam design method optimizes the material utilization efficiency of the lifting beam under various working conditions by ensuring that the absolute values ​​of the maximum positive bending moment and the maximum negative bending moment are equal, thus achieving economic efficiency. It also uses the maximum value of the actual bending moment under each working condition as the design benchmark to ensure that the lifting beam meets safety requirements even under the most unfavorable conditions, thus achieving safety. The combination of these two methods achieves a harmonious balance between safety and economy.

[0019] This universal balanced lifting beam design method systematically considers the non-uniform distribution of lifting points caused by post-cast strips, automatically identifies the most unfavorable control conditions, and achieves a balance between safety and economy. The universal balanced lifting beam designed using this invention can cover the lifting needs of various PC beams with a single beam, significantly reducing the manufacturing and management costs of the beam, and possesses extremely high industrial practical value and promising prospects for widespread application.

[0020] This universal balanced lifting beam design method can be widely applied not only to the lifting of PC beams in prefabricated building construction, but also to the lifting of other multi-segment prefabricated components with non-uniform lifting point distribution, demonstrating its good universality and promotional value. Attached Figure Description

[0021] Figure 1 This is a flowchart of a general balanced lifting beam design method according to the present invention; Figure 2 This is a schematic diagram of the lifting beam and the second lifting point in a general balanced lifting beam design method of the present invention.

[0022] In the diagram: 1. Lifting beam; 2. Second lifting point. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0024] like Figure 1 As shown, this embodiment provides a general balanced lifting beam design method, including the following steps: S1-S6.

[0025] S1: Obtain at least two types of lifting parameters for the PC beams. These parameters include the total weight of each PC beam, segment distribution information, and the pre-set location of the first lifting point on each segment. The segment distribution information includes the number of segments separated by the post-cast strip, the length of each segment, and its spatial location. The first lifting point location information includes the number of first lifting points on each segment and the actual distance of each first lifting point from the center of the PC beam. These parameters constitute the working condition database for subsequent analysis.

[0026] S2: Define the initial structural model of lifting beam 1. Lifting beam 1 is a symmetrical structure to ensure stress balance under symmetrical loads. Two second lifting points 2 are provided on the upper part of lifting beam 1 for connection with lifting equipment, forming a two-point lifting support condition. The distance between the two second lifting points 2 and the center of lifting beam 1 is a design variable, providing degrees of freedom for subsequent optimization. The length of lifting beam 1 must be adapted to the spacing of the outermost lifting points of all PC beams to be lifted, determined by the longest beam length among all PC beams, ensuring coverage of all lifting conditions.

[0027] S3: For each PC beam, the total weight of the PC beam is distributed to the preset first lifting point according to the lifting parameters, forming a load case acting on the lower part of the lifting beam 1; establish the bending moment distribution model of the lifting beam 1 under different second lifting point 2 spacings; take the absolute value of the maximum positive bending moment and the maximum negative bending moment borne by the lifting beam 1 as the optimization objective, and solve the optimization results of the second lifting point 2 corresponding to each PC beam load case.

[0028] Specifically, for each PC beam load case, the total weight of the PC beam is distributed to the first lifting point on each segment using the static equivalence principle, forming a concentrated load set at the bottom of lifting beam 1. Based on structural mechanics principles, lifting beam 1 is simplified to a simply supported beam model, and a bending moment distribution model is established. Let the spacing between the second lifting points 2 be *a*, then the maximum positive bending moment M of lifting beam 1... pos (a) The maximum negative bending moment M occurs directly below the second suspension point 2. neg (a) Appears at the midpoint of the first span of the suspension beam.

[0029] Establish the optimization equation: |M pos (a)|=|M neg (a)|, Solving this equation yields the second suspension point 2 spacing a that makes the absolute values ​​of the positive and negative bending moments equal. i This is the theoretically optimal position of the second lifting point 2 under this working condition, and the corresponding control bending moment M is recorded. i .

[0030] This step is for PC beams of different specifications with different first lifting point distributions. It obtains the position of the second lifting point 2 that optimizes the material utilization efficiency of the beam 1 section, ensuring that the beam 1 is subjected to balanced force under a single working condition and improving the material utilization rate.

[0031] S4: Based on the optimization results of each PC beam working condition, determine the fixed spacing of the second lifting point 2 of the lifting beam 1.

[0032] Specifically, the theoretically optimal second suspension point spacing {a} for all PC beam working conditions is collected. i The statistical characteristic value is calculated as the fixed spacing A of the general second suspension point 2. The statistical characteristic value can be any one of the median, arithmetic mean, weighted average, geometric mean, or a value corrected by engineering experience.

[0033] This step ensures that the fixed spacing of the second lifting point 2 can be adapted to all PC beam lifting conditions.

[0034] S5: Using the second lifting point 2 with a fixed spacing, stress analysis is performed on each PC beam working condition, the actual control bending moment of the lifting beam 1 under each working condition is calculated, and the maximum value of the actual control bending moment under each working condition is used as the design reference bending moment.

[0035] Specifically, the fixed spacing A determined in step S4 is taken as the actual position of the second lifting point 2 on the upper part of the lifting beam 1, and the stress analysis of each PC beam working condition is re-performed to calculate the actual maximum bending moment M of the lifting beam 1 under each working condition. i '. Traverse all working conditions and find all M's. i' The maximum value M in max =max{M i'}, serving as the final design reference bending moment. Simultaneously, identifying the generated M max The corresponding PC beam working condition is marked as the most unfavorable control condition.

[0036] Steps S4 and S5 above, while sacrificing the individual optimality of each working condition, identify the most unfavorable control condition that has an envelope significance for all working conditions by unifying the position of the second lifting point 2 and performing envelope analysis.

[0037] S6: Based on the design reference bending moment, generate a universal balanced lifting beam 1 structure that safely covers all PC beam working conditions.

[0038] Specifically, based on the design reference bending moment M max To control the bending moment, the cross-section of lifting beam 1 is designed, and its strength, stiffness, and overall stability are checked to ensure that lifting beam 1 meets the safety requirements under the most unfavorable control conditions. The final generated universal balanced lifting beam 1 can safely cover the lifting requirements of all PC beams in the database.

[0039] The above method optimizes the lifting points, unifies the lifting point positions and envelope analysis for various PC beam specifications, and enables a single lifting beam 1 to safely cover all PC beam lifting conditions. This effectively solves the problems of cumbersome configuration and poor versatility of lifting beam 1 for lifting multiple PC beam models, significantly reduces construction costs, improves lifting efficiency and ensures lifting safety.

[0040] like Figure 2 As shown, this embodiment also provides a universal balanced lifting beam, which is designed using a universal balanced lifting beam design method. The lifting beam 1 is a symmetrical structure with two symmetrically arranged second lifting points 2 at the top and the bottom used to bear the load transmitted from the first lifting point of each PC beam. Its structural dimensions and cross-sectional form are determined based on the design reference bending moment, and it can safely adapt to various lifting conditions of multi-segment PC beams with post-cast strips.

[0041] The universal balanced lifting beam 1, designed using a design methodology, can cover the lifting needs of various PC beams with a single lifting beam 1, significantly reducing the manufacturing and management costs of the lifting beam 1, and has extremely high industrial practical value and promising prospects for widespread application.

[0042] The universal balanced lifting beam 1 is obtained by the above design method. It can safely cover the lifting needs of PC beams with non-uniform lifting point distribution with a single lifting beam 1 structure. It has the characteristics of balanced structural stress, efficient material utilization and universal adaptability to working conditions.

[0043] This embodiment also provides a general balanced lifting beam design system for implementing the above-mentioned general balanced lifting beam design method, including a data acquisition module, a model definition module, an optimization calculation module, a general parameter determination module, an envelope verification module, and a lifting beam 1 generation module.

[0044] The data acquisition module is used to acquire hoisting parameters for at least two types of PC beams. These parameters include the total weight of each PC beam, segment distribution information, and the location information of the preset first hoisting point on each segment. The PC beam is a multi-segment PC beam with post-cast strips. The segment distribution information includes the number of segments separated by the post-cast strips, the length of each segment, and its spatial location. The first hoisting point location information includes the number of first hoisting points on each segment and the actual distance of each first hoisting point from the center of the PC beam.

[0045] The model definition module is connected to the data acquisition module and is used to define the initial structural model of the lifting beam 1. The lifting beam 1 is a symmetrical structure with two second lifting points 2 on its upper part for connection with the lifting equipment. The distance between the two second lifting points 2 and the center of the lifting beam 1 is a design variable.

[0046] The optimization calculation module is connected to the model definition module to distribute the total weight of the PC beam to the preset first lifting point for each PC beam's lifting parameters, forming a load case acting on the lower part of the lifting beam 1; establish a bending moment distribution model of the lifting beam 1 under different second lifting point 2 spacings; and use the absolute values ​​of the maximum positive bending moment and the maximum negative bending moment borne by the lifting beam 1 being equal as the optimization objective to solve for the optimization results of the second lifting point 2 corresponding to each PC beam load case.

[0047] The general parameter determination module is connected to the optimization calculation module and is used to determine the fixed spacing of the second lifting point 2 of the lifting beam 1 based on the optimization results of each PC beam working condition. The fixed spacing of the second lifting point 2 is selected as the statistical characteristic value of the optimization results of the second lifting point 2 corresponding to each PC beam working condition.

[0048] The envelope verification module is connected to the general parameter determination module. It is used to perform stress analysis on each PC beam working condition by using the second lifting point 2 with a fixed spacing, calculate the actual control bending moment of the lifting beam 1 under each working condition, and use the maximum value of the actual control bending moment under each working condition as the design reference bending moment; at the same time, it identifies the most unfavorable control working condition.

[0049] The lifting beam 1 generation module is connected to the envelope verification module. It is used to generate a general balanced lifting beam 1 structure that safely covers all PC beam working conditions based on the design reference bending moment. At the same time, it completes the cross-sectional design and strength, stiffness and overall stability verification of the lifting beam 1.

[0050] The aforementioned system, through the coordinated operation of six modules—data acquisition, model definition, optimization calculation, general parameter determination, envelope verification, and lifting beam 1 generation—automatically completes the entire design process from multi-condition input to general lifting beam 1 output. It enables the single lifting beam 1 to safely cover the lifting needs of multi-segment PC beams with all non-uniform lifting point distributions, achieving optimal material utilization while ensuring safety.

[0051] Example 1: General Balanced Lifting Beam Design Method This embodiment provides a general balanced lifting beam design method for the design of a general lifting beam 1 for three different specifications of multi-segment PC beams with post-cast strips in a prefabricated building project.

[0052] S1: Data Acquisition Steps Obtain hoisting parameters for three types of PC beams: The segments are separated by post-cast strips, and the first lifting point is only set at the structural integrity position of each segment.

[0053] S2: Model Definition Steps Define the initial structural model of the general-purpose balanced lifting beam 1: the lifting beam 1 is a symmetrical structure with a total length L = 12m (covering the outermost first lifting point position in all working conditions). Two second lifting points 2 are set on the upper part of the lifting beam 1 to connect with the crane, and the distance between the two lifting points is the design variable a (value range 0~12m).

[0054] S3: Single-condition optimization steps Single-load condition optimization is performed using beam type A as an example: First, using the static equivalence principle, the total weight of 120kN is distributed to each of the first lifting points. Based on structural mechanics principles, the bending moment distribution of the lifting beam 1 at different distances 'a' between the second lifting points 2 is calculated. Assuming the distance 'a' between the second lifting points 2, the maximum positive bending moment occurs directly below the second lifting point 2, and the maximum negative bending moment occurs at the mid-span of the lifting beam 1.

[0055] Establish the optimization equation: |M pos (a)|=|M neg (a)| Solving this equation yields the theoretically optimal spacing 'a' between the second suspension points of beam type A. A =5.2m, corresponding control bending moment M A =85kN·m.

[0056] Similarly, optimization calculations are performed for beam type B and beam type C: Beam type B: a B =6.0m, M B =110kN·m; Beam type C: a C =4.8m, M C =70kN·m.

[0057] S4: General Parameter Determination Steps Collect the theoretically optimal spacing of the second lifting point 2 for each working condition: {a A ,a B ,a C ={5.2,6.0,4.8}, take the arithmetic mean: A=(5.2+6.0+4.8) / 3=5.33m, rounded to 5.3m as the fixed spacing of the general second suspension point 2.

[0058] S5: Envelope Verification Steps Using a fixed spacing A=5.3m, stress analysis was performed on three different PC beam working conditions: Beam type A: Actual maximum bending moment M A' =92kN·m; Beam type B: Actual maximum bending moment M B' =108kN·m; Beam type C: Actual maximum bending moment M C' =78kN·m.

[0059] Take the maximum value M max =max{92,108,78}=108kN·m, corresponding to beam type B working condition. This working condition is marked as the most unfavorable control condition.

[0060] S6: Steps to generate Lifting Beam 1 With M maxThe design reference bending moment was 108 kN·m, and the section of the lifting beam 1 was designed accordingly. Q355B steel was selected, and the dimensions of the lifting beam 1 section were designed based on the requirements for strength, stiffness, and overall stability. After verification, the section meets the safety requirements for use under all working conditions.

[0061] The resulting universal balance lifting beam 1 can safely cover the lifting requirements of beam type A, beam type B, and beam type C.

[0062] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A general method for designing a balanced lifting beam, characterized in that, Includes the following steps: S1: Obtain at least two types of lifting parameters for PC beams, including the total weight of each PC beam, segment distribution information, and the position information of the first lifting point on each segment; S2: Define the initial structural model of the lifting beam (1). The lifting beam (1) is a symmetrical structure with two second lifting points (2) on its upper part for connecting with the lifting equipment. The distance between the two second lifting points (2) and the center of the lifting beam (1) is a design variable. S3: For each PC beam hoisting parameter, the total weight of the PC beam is distributed to the preset first hoisting point to form a load condition acting on the lower part of the hoisting beam (1); establish a bending moment distribution model of the hoisting beam (1) under different second hoisting point (2) spacings; take the absolute value of the maximum positive bending moment and the maximum negative bending moment borne by the hoisting beam (1) as the optimization objective, and solve the optimization results of the second hoisting point (2) corresponding to each PC beam condition; S4: Based on the optimization results of each PC beam working condition, determine the fixed spacing of the second lifting point (2) of the lifting beam (1); S5: Using the second suspension point (2) with a fixed spacing, perform stress analysis on each PC beam working condition, calculate the actual control bending moment of the suspension beam (1) under each working condition, and take the maximum value of the actual control bending moment of each working condition as the design reference bending moment. S6: Based on the design reference bending moment, generate a universal balanced lifting beam (1) structure that safely covers all PC beam working conditions.

2. The universal balanced lifting beam design method as described in claim 1, characterized in that, In step S3, the optimization result of the second lifting point (2) is obtained by solving the following optimization equation: |M pos (a)∣=∣M neg (a)∣;where a is the distance between the two second suspension points (2), M pos (a) is the maximum positive bending moment of the lifting beam (1), M neg (a) is the maximum negative bending moment of the lifting beam (1).

3. The universal balanced lifting beam design method as described in claim 1, characterized in that, In step S4, the fixed spacing of the second lifting point (2) is selected as the statistical characteristic value of the optimization result of the second lifting point (2) corresponding to each PC beam working condition.

4. The universal balanced lifting beam design method as described in claim 3, characterized in that, The statistical characteristic value is any one of the median, arithmetic mean, weighted average, and geometric mean.

5. The universal balanced lifting beam design method as described in claim 1, characterized in that, Step S5 further includes identifying the corresponding PC beam working condition that generates the design reference bending moment and marking the working condition as the most unfavorable control working condition.

6. The universal balanced lifting beam design method as described in claim 1, characterized in that, Step S6 also includes cross-sectional design, strength verification, stiffness verification and overall stability verification of the lifting beam (1).

7. The universal balanced lifting beam design method as described in claim 1, characterized in that, Step S3 is used to achieve the following: for PC beams of different specifications with different first lifting point distributions, the second lifting point (2) position is obtained to optimize the material utilization efficiency of the beam (1) section.

8. The universal balanced lifting beam design method as described in claim 1, characterized in that, Steps S4 and S5 are used to achieve the following: under the premise of sacrificing the individual optimality of each working condition, by unifying the position of the second lifting point (2) and performing envelope analysis, the most unfavorable control condition that has an envelope significance for all working conditions is identified.

9. A universal balance lifting beam, characterized in that, The design was obtained using the general balanced lifting beam design method according to any one of claims 1 to 8.

10. A universal balanced lifting beam design system, characterized in that, include: The data acquisition module is used to acquire at least two types of lifting parameters for PC beams. The lifting parameters include the total weight of each PC beam, segment distribution information, and the preset first lifting point position information on each segment. The model definition module is connected to the data acquisition module and is used to define the initial structural model of the lifting beam (1). The lifting beam (1) is a symmetrical structure with two second lifting points (2) on its upper part for connecting with the lifting equipment. The distance between the two second lifting points (2) and the center of the lifting beam (1) is a design variable. The optimization calculation module is connected to the model definition module and is used to distribute the total weight of the PC beam to the preset first lifting point for each PC beam lifting parameter to form a load condition acting on the lower part of the lifting beam (1); establish the bending moment distribution model of the lifting beam (1) under different second lifting point (2) spacings; take the absolute values ​​of the maximum positive bending moment and the maximum negative bending moment borne by the lifting beam (1) as the optimization objective, and solve the optimization results of the second lifting point (2) corresponding to each PC beam condition; The general parameter determination module is connected to the optimization calculation module and is used to determine the fixed spacing of the second lifting point (2) of the lifting beam (1) based on the optimization results of each PC beam working condition; The envelope verification module is connected to the general parameter determination module. It is used to perform stress analysis on each PC beam working condition by using the second suspension point (2) with a fixed spacing, calculate the actual control bending moment of the suspension beam (1) under each working condition, and use the maximum value of the actual control bending moment of each working condition as the design reference bending moment. The lifting beam (1) generation module is connected to the envelope verification module and is used to generate a general balanced lifting beam (1) structure that safely covers all PC beam working conditions based on the design reference bending moment.

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