Method, device and equipment for determining theoretical elevation of steel beam to-be-erected segment splicing

Abstract

The application discloses a method, device and equipment for determining a theoretical elevation of a steel beam to-be-erected segment, and relates to the technical field of bridge construction.The method comprises the following steps: constructing a steel beam installation finite element model according to an already-erected segment and the steel beam to-be-erected segment, and selecting a control point; obtaining two groups of front and rear support reaction forces of a crane, and respectively applying the two groups of front and rear support reaction forces to the steel beam installation finite element model to obtain two groups of vertical deformation amounts of the control point, and then obtaining a ratio of two groups of deformation difference values of each adjacent two control points; obtaining actual deformation amounts of the control points on the already-erected segment after pre-connection of the steel beam to-be-erected segment, and then obtaining a deformation difference value evolution coefficient of adjacent control points; obtaining design elevations of two control points on the steel beam to-be-erected segment, and then obtaining a theoretical elevation of the two control points on the steel beam to-be-erected segment.The application can realize accurate calculation of the theoretical elevation of the steel beam to-be-erected segment, directly judge the rationality of a measured elevation value of the steel beam to-be-erected segment in an actual state, and provide support for high-precision control of a linear shape.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, specifically to a method, device, and equipment for determining the theoretical elevation of steel beam segments to be erected. Background Technology

[0002] Currently, due to the requirements of span and vehicle stiffness, long-span railway bridges often use steel beam structures for their main girders. The steel beams are divided into multiple segments along the bridge's longitudinal direction. Each segment is manufactured in a factory and then assembled on-site. The common assembly method is bolted connection for the main truss (or web) and welding for the bridge deck. However, due to discrepancies between the manufactured steel beam configuration and the design values, as well as inherent errors during assembly, these errors can cause the assembled beam segments to deviate from the target alignment. Because long-span bridges have a large number of segments, this alignment deviation accumulates after assembly. If adjustments are not made promptly, the deviation of the completed bridge alignment can reach tens of centimeters or even greater, jeopardizing both bridge and vehicle safety.

[0003] In related technologies, errors in steel beam manufacturing and assembly have a significant impact on the bridge's alignment. Therefore, after the main truss (or web) punching is completed, the theoretical assembly elevation of the beam segment to be erected needs to be determined, and it must be assessed whether the theoretical assembly elevation is within the control range. If it is within the control range, the next construction step can proceed; if it exceeds the control range, adjustments to the splicing plates are required.

[0004] However, the accuracy of existing methods for determining the theoretical assembly elevation of the beam segments to be erected is not high, mainly due to the following reasons: ① During the assembly of the steel beam segments, it is difficult to accurately obtain the reaction forces at the front and rear supports of the crane; ② The steel beam segments are heavy, and the actual weight is difficult to accurately obtain, with weight deviations generally around 5% based on structural deformation calculations; ③ The large reaction forces at the front and rear supports of the crane cause bending, facade distortion, and compression coupling deformation of the vertical members (or webs) in the steel beam, resulting in complex deformation at the assembly point. Therefore, accurately obtaining the theoretical assembly elevation of the beam segments to be erected is an urgent problem to be solved. Summary of the Invention

[0005] This application provides a method, apparatus, and equipment for determining the theoretical elevation of steel beam segments to be erected, which can solve the technical problem of low accuracy in identifying theoretical assembly elevation in the prior art.

[0006] In a first aspect, embodiments of this application provide a method for determining the theoretical elevation of steel beam segments to be erected during assembly. This method includes:

[0007] A finite element model of steel beam installation is constructed based on the erected beam segment and the beam segment to be erected. A preset number of steel beam nodes at the cantilever end of the erected beam segment and two steel beam nodes of the beam segment to be erected are selected as control points; the preset number is greater than or equal to 2.

[0008] The two sets of front and rear support point reactions of the crane are obtained and applied to the above-mentioned steel beam installation finite element model respectively to obtain the two sets of vertical deformation at each control point, and then the ratio of the two sets of deformation differences between each two adjacent control points is obtained.

[0009] The actual deformation of each control point on the pre-connected beam segment to be erected is obtained, and the deformation difference evolution coefficient of adjacent control points is obtained based on the ratio of the two sets of deformation difference values ​​of each two adjacent control points on the pre-erected beam segment and the above actual deformation.

[0010] Obtain the design elevation of two control points on the beam segment to be erected, and based on the design elevation and the deformation difference evolution coefficient, obtain the assembly theoretical elevation of the two control points on the beam segment to be erected.

[0011] In conjunction with the first aspect, in one implementation, obtaining the reaction forces at the two sets of front and rear support points of the crane specifically includes:

[0012] Obtain the weight of the beam segment to be erected, the weight of the crane, the distance from the center of gravity of the beam segment to be erected to the front support of the crane, and the distance from the front support to the rear support of the crane, and then calculate the reaction forces of the first set of front and rear supports;

[0013] Change the weight of the beam segment to be erected, and calculate the second set of front and rear support reactions based on the new weight of the beam segment to be erected.

[0014] In conjunction with the first aspect, in one implementation method, the reaction forces at any set of front and rear support points are:

[0015]

[0016] Wherein, F1 is the reaction force at the front support of the crane; F2 is the reaction force at the rear support of the crane; G1 is the weight of the beam segment to be erected; G2 is the weight of the crane; l1 is the distance from the center of gravity of the beam segment to be erected to the front support of the crane; l2 is the distance from the front support of the crane to the rear support.

[0017] In conjunction with the first aspect, in one embodiment, the weight of the new beam segment to be erected is 80%-90% or 110%-120% of the obtained weight of the beam segment to be erected.

[0018] In conjunction with the first aspect, in one implementation, the deformation difference evolution coefficient S between adjacent control points is:

[0019]

[0020] Where n is the number of control points; the control point farthest from the beam segment to be erected is taken as the first control point, vi Let i be the actual deformation at the i-th control point. Let r be the vertical deformation of the i-th control point in the first group. i c It is the ratio of the two sets of deformation differences between the i-th control point and the (i+1)-th control point.

[0021] In conjunction with the first aspect, in one implementation method, the theoretical assembly elevation of the two control points on the aforementioned beam segment to be erected is:

[0022]

[0023] Among them, H n-1 H represents the theoretical elevation of the (n-1)th control point during assembly. n The theoretical elevation for assembling the nth control point; The design elevation of the (n-1)th control point; Let n be the design elevation of the nth control point.

[0024] In conjunction with the first aspect, in one implementation, the ratio of the two sets of deformation differences between the i-th control point and the (i+1)-th control point is:

[0025]

[0026] in, This represents the vertical deformation of the i-th control point in the second group.

[0027] In conjunction with the first aspect, in one implementation, the aforementioned preset quantity is less than or equal to 6.

[0028] Secondly, embodiments of this application provide a device for determining the theoretical elevation of steel beam segments to be erected, the device comprising:

[0029] The modeling module is used to construct a finite element model of steel beam installation based on the erected beam segment and the beam segment to be erected, and selects a preset number of steel beam nodes at the cantilever end of the erected beam segment and two steel beam nodes of the beam segment to be erected as control points; the preset number is greater than or equal to 2.

[0030] The ratio acquisition module is used to acquire the two sets of front and rear support point reactions of the crane and apply them to the above-mentioned steel beam installation finite element model to obtain the two sets of vertical deformation at each control point, and then obtain the ratio of the two sets of deformation differences between each pair of adjacent control points.

[0031] The deformation difference evolution coefficient acquisition module is used to acquire the actual deformation of each control point on the pre-connected beam segment after the beam segment to be erected, and to acquire the deformation difference evolution coefficient of adjacent control points based on the ratio of the two sets of deformation difference values ​​of each pair of adjacent control points on the pre-erected beam segment and the actual deformation value mentioned above.

[0032] The module for obtaining the theoretical elevation of the assembly is used to obtain the design elevation of two control points on the beam segment to be erected, and to obtain the theoretical elevation of the assembly of the two control points on the beam segment to be erected based on the design elevation and the deformation difference evolution coefficient.

[0033] Thirdly, embodiments of this application provide a device for determining the theoretical elevation of steel beam segments to be erected. This device includes a processor, a memory, and a program for determining the theoretical elevation of steel beam segments to be erected, stored in the memory and executable by the processor. When the processor executes the program, it implements the steps of the method for determining the theoretical elevation of steel beam segments to be erected.

[0034] A finite element model of steel beam installation is constructed based on the erected beam segment and the beam segment to be erected. A preset number of steel beam nodes at the cantilever end of the erected beam segment and two steel beam nodes of the beam segment to be erected are selected as control points; the preset number is greater than or equal to 2.

[0035] The two sets of front and rear support point reactions of the crane are obtained and applied to the above-mentioned steel beam installation finite element model respectively to obtain the two sets of vertical deformation at each control point, and then the ratio of the two sets of deformation differences between each two adjacent control points is obtained.

[0036] The actual deformation of each control point on the pre-connected beam segment to be erected is obtained, and the deformation difference evolution coefficient of adjacent control points is obtained based on the ratio of the two sets of deformation difference values ​​of each two adjacent control points on the pre-erected beam segment and the above actual deformation.

[0037] Obtain the design elevation of two control points on the beam segment to be erected, and based on the design elevation and the deformation difference evolution coefficient, obtain the assembly theoretical elevation of the two control points on the beam segment to be erected.

[0038] In conjunction with the third aspect, in one embodiment, when the above-mentioned steel beam segment assembly theoretical elevation determination program is executed by the above-mentioned processor, other steps in the above-mentioned steel beam segment assembly theoretical elevation determination method can also be implemented.

[0039] The beneficial effects of the technical solutions provided in this application include:

[0040] A finite element model of steel beam installation was constructed based on the erected and unerring beam segments. A predetermined number of steel beam nodes at the cantilever ends of the erected segments and two steel beam nodes in the unerring beam segment were selected as control points. Two sets of front and rear support reactions of the crane were then obtained and applied to the finite element model. Two sets of vertical deformations at each control point were obtained, and the ratio of the deformation differences between two adjacent control points was calculated. The actual deformation of each control point on the erected segment after pre-connection of the unerring beam segment was then obtained. Finally, the ratio of the deformation differences between two adjacent control points on the erected segment and the above... The actual deformation is described, and the deformation difference evolution coefficient of adjacent control points is obtained. Finally, based on the design elevation of the two control points on the beam segment to be erected and the above deformation difference evolution coefficient, the assembly theoretical elevation of the two control points on the beam segment to be erected is obtained. This can actively filter out the influence of differences in weight, stiffness, temperature, etc. on the elevation in the theoretical calculation, realize the accurate calculation of the assembly theoretical elevation of the beam segment to be erected, and directly evaluate the rationality of the actual measured elevation value of the beam segment to be erected under actual conditions. This provides support for high-precision control of the alignment and solves the technical problem of low accuracy of theoretical assembly elevation identification in the existing technology. Attached Figure Description

[0041] Figure 1 This is a flowchart illustrating an embodiment of the method for determining the theoretical elevation of steel beam segments to be erected according to this application;

[0042] Figure 2 This is a schematic diagram of the erection and assembly of the steel beam sections already erected and the sections to be erected in this application, as well as the control points.

[0043] Figure label:

[0044] 1. Beam section already erected; 2. Beam section to be erected; 3. Crane; 31. Front support point of crane; 32. Rear support point of crane; 4. Main truss splicing plate; 5. First control point; 6. Second control point; 7. Third control point; 8. Fourth control point; 9. Fifth control point. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0046] In one aspect, embodiments of this application provide a method for determining the theoretical elevation of steel beam segments to be erected.

[0047] like Figure 1 As shown, the method for determining the theoretical elevation of the steel beam segments to be erected includes the following steps:

[0048] S1. Construct a finite element model of steel beam installation based on the erected beam segment and the beam segment to be erected, and select a preset number of steel beam nodes at the cantilever end of the erected beam segment and two steel beam nodes of the beam segment to be erected as control points; the preset number is greater than or equal to 2.

[0049] In this embodiment, n steel beam nodes can be selected sequentially as control points, with two control points on the beam segment to be erected and the other n-2 selected on the cantilever end of the already erected beam segment near the beam segment to be erected. The steel beam node of each beam segment is the intersection of the diagonal member, the vertical member, and the lower chord, that is, each beam segment to be erected has two steel beam nodes.

[0050] S2. Obtain the two sets of front and rear support reaction forces of the crane and apply them to the above steel beam installation finite element model respectively to obtain the two sets of vertical deformation at each control point, and then obtain the ratio of the two sets of deformation differences between each pair of adjacent control points.

[0051] S3. Obtain the actual deformation of each control point on the pre-connected beam segment after the beam segment to be erected, and obtain the deformation difference evolution coefficient of adjacent control points based on the ratio of the two sets of deformation difference values ​​of each pair of adjacent control points on the pre-erected beam segment and the above actual deformation.

[0052] S4. Obtain the design elevation of the two control points on the beam segment to be erected, and based on the above design elevation and the above deformation difference evolution coefficient, obtain the assembly theoretical elevation of the two control points on the beam segment to be erected.

[0053] In this embodiment, a finite element model of steel beam installation is constructed based on the erected beam segment and the beam segment to be erected. A predetermined number of steel beam nodes at the cantilever end of the erected beam segment and two steel beam nodes of the beam segment to be erected are selected as control points. Then, the two sets of front and rear support reaction forces of the crane are obtained and applied to the above-mentioned finite element model of steel beam installation to obtain two sets of vertical deformation at each control point. Then, the ratio of the two sets of deformation differences between each pair of adjacent control points is obtained. Next, the actual deformation of each control point on the erected beam segment after the beam segment to be erected is obtained, and the ratio of the two sets of deformation differences between each pair of adjacent control points on the erected beam segment is used as the basis for the calculation. Based on the actual deformation value and the above-mentioned deformation amount, the deformation difference evolution coefficient of adjacent control points is obtained. Finally, based on the design elevation of the two control points on the beam segment to be erected and the above-mentioned deformation difference evolution coefficient, the assembly theoretical elevation of the two control points on the beam segment to be erected is obtained. This can actively filter out the influence of differences in weight, stiffness, temperature, etc. on the elevation in the theoretical calculation, realize the accurate calculation of the assembly theoretical elevation of the beam segment to be erected, and directly evaluate the rationality of the actual measured elevation value of the beam segment to be erected under actual conditions. This provides support for high-precision control of the alignment and solves the technical problem of low accuracy of theoretical assembly elevation identification in the existing technology.

[0054] Furthermore, in one embodiment, obtaining the reaction forces at the two sets of front and rear support points of the crane specifically includes:

[0055] First, obtain the weight of the beam segment to be erected, the weight of the crane, the distance from the center of gravity of the beam segment to be erected to the front support point of the crane, and the distance from the front support point of the crane to the rear support point. Then, based on the weight of the beam segment to be erected, the weight of the crane, the distance from the center of gravity of the beam segment to be erected to the front support point of the crane, and the distance from the front support point of the crane to the rear support point, calculate the first set of front and rear support point reaction forces.

[0056] Then, the weight of the beam segment to be erected is changed, and based on the new weight of the beam segment to be erected, the weight of the crane, the distance from the center of gravity of the beam segment to be erected to the front support point of the crane, and the distance from the front support point of the crane to the rear support point, the second set of front and rear support point reactions are calculated.

[0057] In this embodiment, two sets of front and rear support reaction forces are obtained by initially acquiring the weight of the beam segment to be erected and by updating the weight of the beam segment to be erected, so as to overcome the problem of low accuracy of theoretical assembly elevation caused by low accuracy of acquiring the weight of the beam segment to be erected.

[0058] Furthermore, in one embodiment, the reaction forces at any set of front and rear support points are calculated according to the following formula 1:

[0059]

[0060] Wherein, F1 is the reaction force at the front support of the crane; F2 is the reaction force at the rear support of the crane; G1 is the weight of the beam segment to be erected; G2 is the weight of the crane; l1 is the distance from the center of gravity of the beam segment to be erected to the front support of the crane; l2 is the distance from the front support of the crane to the rear support of the crane.

[0061] In this embodiment, a finite element model of the steel beam installation is established, and the beam segment to be erected is installed stress-free with the already erected beam segment according to the designed configuration and without considering structural weight. The reaction forces of the first set of crane front and rear supports are first applied to the finite element simulation model to obtain the vertical deformation of the first set of n control points. Subsequently, the reactions at the front and rear supports of the second set of cranes were applied to the finite element simulation model, and the vertical deformation of the second set of n control points was obtained.

[0062] In this embodiment, the new weight of the beam segment to be erected obtained after changing the weight of the beam segment to be erected is 80%-90% or 110%-120% of the initially obtained weight of the beam segment to be erected.

[0063] Furthermore, in one embodiment, the ratio r of the two sets of deformation differences between the i-th control point and the (i+1)-th control point is calculated according to Equation 2. i c for:

[0064]

[0065] in, Let be the vertical deformation of the i-th control point in the first group. This represents the vertical deformation of the i-th control point in the second group.

[0066] In this embodiment, the ratio of the two sets of deformation differences between every two adjacent control points is obtained by calculation. This is to facilitate subsequent deformation recognition and processing.

[0067] Furthermore, in one embodiment, after the erected beam segment and the beam segment to be erected are connected by main truss splicing plates and positioning pins, the deformation v1 to v2 of the erected beam segment under actual conditions can be obtained. n-2 .

[0068] Subsequently, the deformation difference evolution coefficient S of adjacent control points under actual conditions is determined according to Equation 3:

[0069]

[0070] Where n is the number of control points; the control point farthest from the section to be erected is the first control point, and so on, that is, on the section to be erected, the control point farthest from the already erected section is the nth control point, v i Let i be the actual deformation at the i-th control point. Let r be the vertical deformation of the i-th control point in the first group. i c It is the ratio of the two sets of deformation differences between the i-th control point and the (i+1)-th control point.

[0071] Furthermore, based on the design elevations of the two control points of the beam segment to be erected, namely the (n-1)th control point and the nth control point, the theoretical assembly elevations of these two control points under assembly conditions are calculated according to Formula 4. The theoretical assembly elevations of the two control points on the beam segment to be erected are as follows:

[0072]

[0073] Among them, H n-1 H represents the theoretical elevation of the (n-1)th control point during assembly. n The theoretical elevation for assembling the nth control point; The design elevation of the (n-1)th control point; Let n be the design elevation of the nth control point.

[0074] Furthermore, in one embodiment, the aforementioned preset number is less than or equal to 6, that is, the number of control points on the erected beam segment is less than or equal to 6.

[0075] In this embodiment, the vertical deformation and rotation of the structure under various loads vary complexly along the longitudinal direction of the bridge, while the changes in curvature caused by different loads are basically linear. Based on this mechanical behavior, this application actively filters out the influence of differences in weight, stiffness, temperature, etc., on the elevation in theoretical calculations, achieving accurate calculation of the theoretical elevation of the beam segment to be erected. Based on the theoretical elevation, the measured elevation value of the beam segment to be erected under actual conditions can be directly evaluated, allowing for timely understanding of the evolution law of the main beam alignment, correction of the deviation between the actual assembly elevation and the theoretical value, and ensuring that the elevation of the beam segment to be erected is within a controllable range. This ensures that the completed bridge alignment is completely consistent with the design alignment, guaranteeing bridge safety and traffic safety.

[0076] like Figure 2 As shown, in one embodiment, the main beam is a steel truss beam with a length of 14m, divided into an erected beam segment 1 and a beam segment to be erected 2. The crane 3 weighs 9000kN, and its connection to the main beam is via a front support point 31 and a rear support point 32. The beam segment to be erected weighs 15500kN. The distance from the center of gravity of the steel beam segment to be erected to the front support point 31 of the crane is 21m, and the distance from the front support point 31 to the rear support point 32 of the crane is 26m. Five main beam nodes, including the beam segment to be erected, are sequentially selected as control points: first control point 5, second control point 6, third control point 7, fourth control point 8, and fifth control point 9. The fourth control point 8 and fifth control point 9 are located on the beam segment to be erected 2, while the first control point 5, second control point 6, and third control point 7 are located on the erected beam segment 1.

[0077] The method for determining the theoretical elevation of the steel beam segments to be erected includes the following steps:

[0078] Step 1: Determine the first set of vertical deformations at each control point, i.e., establish a finite element model for steel beam installation. The steel beam to be erected is installed stress-free with the already erected steel beam in the form of the designed configuration, neglecting structural weight. The reaction force F1 at the front support point 31 of the crane is calculated as -37019.2 kN, and the reaction force F2 at the rear support point 32 of the crane is calculated as 12519.2 kN, according to Equation 1. The front and rear support point reactions of the crane are applied to the finite element simulation model, and the first set of vertical deformations at the five control points is obtained. They are -91mm, -143mm, -199mm, -239mm, and -270mm respectively.

[0079] Step 2: Determine the second set of vertical deformations at each control point. This involves changing the weight of the steel beam to be erected, G1′, to 17500kN. Calculate the reaction force F1′ at the front support point 31 of the crane as -40634.6kN and the reaction force F2′ at the rear support point 32 of the crane as 14134.6kN using Equation 1. In the finite element model of the steel beam installation, after updating the reactions at the front and rear support points of the crane, obtain the second set of vertical deformations at the five control points. They are -174mm, -238mm, -307mm, -357mm, and -398mm respectively.

[0080] Step 3: Determine the ratio of the vertical deformation of the first group to that of the second group at adjacent control points, i.e., calculate the ratio of the vertical deformation of the first group to that of the second group at adjacent control points according to Equation 2. The values ​​are 0.808, 0.815, 0.785, and 0.761.

[0081] Step 4: Determine the evolution coefficient S of the deformation difference between adjacent nodes in the actual state. After connecting the main beam of the erected beam segment and the main beam of the beam segment to be erected with splice plates and positioning pins, obtain the deformation of the three control points of the erected beam segment in the actual state as -133mm, -191mm and -253mm respectively. According to Equation 3, the deformation difference ratio S between the actual state and the first group of vertical deformation is determined to be 1.38.

[0082] Step 5: Calculate the theoretical elevation of the control points for the beam segment to be erected. That is, obtain the design elevation of the 4th control point as 51.000m and the design elevation of the 5th control point as 51.140m. According to Equation 4, the theoretical elevations of these two control points under actual conditions are calculated to be 50.689m and 50.812m respectively.

[0083] At this point, the measured elevation data of the control points of the beam segment to be erected can be compared with the theoretical elevation value of the assembly in step 5. If the elevation error of each control point is within 10mm, subsequent construction can proceed. Otherwise, adjust the dimensions of the main truss splicing plate 4 to ensure that the measured elevation is within the control range.

[0084] Secondly, this application also provides a device for determining the theoretical elevation of steel beam segments to be erected.

[0085] The aforementioned device for determining the theoretical elevation of the steel beam segments to be erected includes a modeling module, a ratio acquisition module, a deformation difference evolution coefficient acquisition module, and an assembly theoretical elevation acquisition module.

[0086] The aforementioned modeling module is used to construct a finite element model of steel beam installation based on the erected beam segment and the beam segment to be erected, and to select a preset number of steel beam nodes at the cantilever end of the erected beam segment and two steel beam nodes of the beam segment to be erected as control points; the preset number is greater than or equal to 2.

[0087] The aforementioned ratio acquisition module is used to acquire the two sets of front and rear support point reactions of the crane and apply them to the aforementioned steel beam installation finite element model to obtain the two sets of vertical deformation at each control point, and then obtain the ratio of the two sets of deformation differences between each pair of adjacent control points.

[0088] The aforementioned deformation difference evolution coefficient acquisition module is used to obtain the actual deformation of each control point on the pre-connected beam segment, and to obtain the deformation difference evolution coefficient of adjacent control points based on the ratio of the two sets of deformation differences of each pair of adjacent control points on the pre-connected beam segment and the aforementioned actual deformation.

[0089] The above-mentioned assembly theoretical elevation acquisition module is used to obtain the design elevation of two control points on the beam segment to be erected, and to obtain the assembly theoretical elevation of the two control points on the beam segment to be erected based on the above-mentioned design elevation and the above-mentioned deformation difference evolution coefficient.

[0090] Furthermore, in one embodiment, the ratio acquisition module is also used to acquire the weight of the beam segment to be erected, the weight of the crane, the distance from the center of gravity of the beam segment to be erected to the front support point of the crane, and the distance from the front support point of the crane to the rear support point, and then calculate the first set of front and rear support point reactions; and change the weight of the beam segment to be erected, and calculate the second set of front and rear support point reactions based on the new weight of the beam segment to be erected.

[0091] Furthermore, in one embodiment, the weight of the new beam segment to be erected is 80%-90% or 110%-120% of the obtained weight of the beam segment to be erected.

[0092] The functions of each module in the above-mentioned device for determining the theoretical elevation of steel beam segments to be erected correspond to the steps in the above-mentioned method embodiment for determining the theoretical elevation of steel beam segments to be erected. Their functions and implementation processes will not be described in detail here.

[0093] Thirdly, this application provides a device for determining the theoretical elevation of steel beam segments to be erected. The device for determining the theoretical elevation of steel beam segments to be erected can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0094] In this embodiment of the application, the device for determining the theoretical elevation of the steel beam segment to be erected may include a processor, a memory, a communication interface, and a communication bus.

[0095] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0096] The processor can be a general-purpose processor, which can call the program for determining the theoretical elevation of the steel beam segments to be erected, stored in memory, and execute the method for determining the theoretical elevation of the steel beam segments to be erected provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the program for determining the theoretical elevation of the steel beam segments to be erected is called can refer to the various embodiments of the method for determining the theoretical elevation of the steel beam segments to be erected in this application, and will not be repeated here.

[0097] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0098] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0099] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0100] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0101] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0102] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0103] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for determining the theoretical elevation of steel beam segments to be erected during assembly, characterized in that, The method for determining the theoretical elevation of the steel beam segment to be erected includes: A finite element model of steel beam installation is constructed based on the erected beam segment and the beam segment to be erected, and a preset number of steel beam nodes at the cantilever end of the erected beam segment and two steel beam nodes of the beam segment to be erected are selected as control points; the preset number is greater than or equal to 2. The two sets of front and rear support point reactions of the crane are obtained and applied to the finite element model of the steel beam installation respectively to obtain the two sets of vertical deformation at each control point, and then the ratio of the two sets of deformation differences between each two adjacent control points is obtained. The actual deformation of each control point on the pre-connected beam segment to be erected is obtained, and the deformation difference evolution coefficient of adjacent control points is obtained based on the ratio of the two sets of deformation difference values ​​of each two adjacent control points on the pre-erected beam segment and the actual deformation. Obtain the design elevation of two control points on the beam segment to be erected, and obtain the assembly theoretical elevation of the two control points on the beam segment to be erected based on the design elevation and the deformation difference evolution coefficient; Obtain the two sets of front and rear support reaction forces of the crane, specifically including: Obtain the weight of the beam segment to be erected, the weight of the crane, the distance from the center of gravity of the beam segment to be erected to the front support of the crane, and the distance from the front support to the rear support of the crane, and then calculate the reaction forces of the first set of front and rear supports; Change the weight of the beam segment to be erected, and calculate the second set of front and rear support reactions based on the new weight of the beam segment to be erected; The evolution coefficient S of the deformation difference between adjacent control points is: Where n is the number of control points; the control point farthest from the beam segment to be erected is taken as the first control point. Let i be the actual deformation at the i-th control point. Let be the vertical deformation of the i-th control point in the first group. It is the ratio of the two sets of deformation differences between the i-th control point and the (i+1)-th control point.

2. The method for determining the theoretical elevation of the steel beam segment to be erected as described in claim 1, characterized in that, The reaction forces at any set of front and rear fulcrums are: in, This is the reaction force at the front support point of the crane; This is the reaction force at the rear support point of the crane; G 1 represents the weight of the beam segment to be erected; G 2 represents the weight of the crane; l 1 represents the distance from the center of gravity of the section of beam to be erected to the front support point of the crane; l 2 represents the distance from the front support point to the rear support point of the crane.

3. The method for determining the theoretical elevation of the steel beam segment to be erected as described in claim 1, characterized in that, The new weight of the beam segment to be erected is 80%-90% or 110%-120% of the weight of the obtained beam segment to be erected.

4. The method for determining the theoretical elevation of the steel beam segment to be erected as described in claim 1, characterized in that, The theoretical assembly elevation of the two control points on the beam segment to be erected is: in, For the first n -The theoretical elevation of the assembly of 1 control point; For the first n The theoretical elevation of each control point; For the first n -Design elevation of 1 control point; For the first n Design elevation of each control point.

5. The method for determining the theoretical elevation of the steel beam segment to be erected as described in claim 1, characterized in that, in, This represents the vertical deformation of the i-th control point in the second group.

6. The method for determining the theoretical elevation of the steel beam segment to be erected as described in claim 1, characterized in that: The preset quantity is less than or equal to 6.

7. A device for determining the theoretical elevation of steel beam segments to be erected, implementing the method of claim 1, characterized in that, The device for determining the theoretical elevation of the steel beam segment to be erected includes: The modeling module is used to construct a finite element model of steel beam installation based on the erected beam segment and the beam segment to be erected, and selects a preset number of steel beam nodes at the cantilever end of the erected beam segment and two steel beam nodes of the beam segment to be erected as control points; the preset number is greater than or equal to 2. The ratio acquisition module is used to acquire the two sets of front and rear support point reactions of the crane and apply them to the finite element model of the steel beam installation respectively to obtain the two sets of vertical deformation at each control point, and then obtain the ratio of the two sets of deformation differences between each pair of adjacent control points. The deformation difference evolution coefficient acquisition module is used to acquire the actual deformation of each control point on the pre-connected beam segment after the beam segment to be erected, and to acquire the deformation difference evolution coefficient of adjacent control points based on the ratio of the two sets of deformation difference values ​​of each pair of adjacent control points on the pre-erected beam segment and the actual deformation value. The assembly theoretical elevation acquisition module is used to acquire the design elevation of two control points on the beam segment to be erected, and to acquire the assembly theoretical elevation of the two control points on the beam segment to be erected based on the design elevation and the deformation difference evolution coefficient.

8. A device for determining the theoretical elevation of steel beam segments to be erected, characterized in that, The device for determining the theoretical elevation of steel beam segments to be erected includes a processor, a memory, and a program for determining the theoretical elevation of steel beam segments to be erected, stored in the memory and executable by the processor. When the program for determining the theoretical elevation of steel beam segments to be erected is executed by the processor, it implements the steps of the method for determining the theoretical elevation of steel beam segments to be erected as described in any one of claims 1 to 6.

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