A method, device and computer equipment for evaluating damage of hinged joints in hollow slabs

Abstract

The present application relates to the technical field of bridge safety evaluation, and particularly relates to a hollow slab hinge joint damage evaluation method, device and computer equipment. The method comprises the following steps: obtaining deflection transverse distribution measured curves and deflection transverse distribution theoretical curves of hollow slabs under the same stress state; according to the relationship between the deflection transverse distribution theoretical value and the deflection transverse distribution correction value, and based on the hinge joint transverse force transmission coefficient between every two hollow slabs, a deflection transverse distribution correction model is established; according to the deflection transverse distribution correction model, when the curve formed by the deflection transverse distribution correction value and the deflection transverse distribution measured curve are within the set range, the hinge joint transverse force transmission coefficient between every two hollow slabs is determined. The problem that the existing technology cannot quantitatively evaluate the force transmission performance of each hinge joint, so as to be unable to judge the damage of each hinge joint, and leading to the complexity of maintenance judgment can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge safety evaluation, and in particular to a method, device and computer equipment for evaluating damage of hinged joints in hollow slabs. Background Art

[0002] The hinge joints of prefabricated bridges are highly susceptible to damage or even destruction under the impact of overweight vehicles, causing stress on the individual slabs and posing a significant safety hazard. A certain bridge, completed and opened to traffic in 2000, features approach spans 1 through 6 with a span of 20 meters. Twenty-four prestressed hollow slabs are arranged transversely, with shallow, vertical small hinge joints connecting the slabs. The structure is simply supported, with a continuous bridge deck. In March 2021, an overweight truck (gross weight 102 tons) loaded with sand and gravel was traveling on the sixth span when the 21# hollow slab was damaged, causing the vehicle to overturn.

[0003] At present, in the study of the lateral distribution of load on hollow slab bridges, the existing technology mainly analyzes the actual damage of hinged joints and its impact on the lateral distribution of load on the main beam through fitting.

[0004] However, the existing technology is unable to quantitatively evaluate the force transmission performance of each hinged joint, and thus is unable to determine the damage condition of each hinged joint, resulting in a complex problem in determining whether to repair it. Summary of the Invention

[0005] In response to the defects existing in the prior art, the purpose of the present invention is to provide a method, device and computer equipment for evaluating the damage of hollow slab hinged joints, which can solve the problem in the prior art that it is impossible to quantitatively evaluate the force transmission performance of each hinged joint, and thus it is impossible to determine the damage status of each hinged joint, which makes the judgment of whether to repair it complicated.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] The present invention provides a method for evaluating damage of a hinged joint of a hollow slab, which is characterized by comprising the following steps:

[0008] Obtain the measured curve and theoretical curve of the transverse distribution of deflection of the hollow slab under the same stress state;

[0009] According to the relationship between the theoretical value of the transverse distribution of deflection and the modified value of the transverse distribution of deflection, a modified model of the transverse distribution of deflection is established based on the transverse force transmission coefficient of the hinged joint between every two hollow slabs.

[0010] According to the deflection transverse distribution correction model, the transverse force transmission coefficient of the hinged joint between every two hollow slabs is determined when the curve formed by the deflection transverse distribution correction value and the measured transverse distribution curve of the deflection are within the set range.

[0011] In some optional solutions, the above-mentioned establishment of a correction model for the transverse distribution of deflection based on the relationship between the theoretical value of the transverse distribution of deflection and the correction value of the transverse distribution of deflection and based on the transverse force transmission coefficient of the hinged joint between every two hollow slabs includes:

[0012] According to the transverse force transmission coefficient of the hinged joint between every two hollow slabs, a transverse distribution model of internal force of hollow slabs is established, which is based on the theoretical value of transverse distribution of internal force of hollow slabs and the transverse distribution value of damage internal force of hollow slabs.

[0013] According to the relationship between the internal force and deflection of the hollow slab, the internal force-deflection relationship model is established;

[0014] Based on the lateral force transmission coefficient of the hinged joint between every two hollow slabs, the damage internal force lateral distribution model and the internal force-deflection relationship model, a deflection lateral distribution correction model is established, which includes the theoretical value and correction value of the deflection lateral distribution.

[0015] In some optional solutions, the lateral distribution model of the damage internal force is:

[0016]

[0017] Among them, φ k is the transverse force transmission coefficient of the hinged joint between the kth hollow slab and the k+1th hollow slab, n is the number of hollow slabs, q k is the internal force of the kth hollow slab before hinged joint damage, q′ k is the internal force of the kth hollow slab after hinged joint damage.

[0018] In some optional solutions, the internal force-deflection relationship model is:

[0019]

[0020] Among them, c(E k ,I k ,L k ) is the relationship coefficient between the internal force and deflection of the kth hollow slab, q k is the internal force of the kth hollow slab before hinged joint damage, ω k is the kth hollow slab at q before hinged joint damage k Deflection under internal forces.

[0021] In some optional solutions, the deflection lateral distribution correction model is:

[0022] [Φ s ][C(E,I,L)][Ω s ]+[Φ t ][C(E,I,L)][Ω t ]=[C(E,I,L)][Ω']

[0023] Among them, C(E,I,L) is the coefficient matrix of the relationship between the internal force and deflection of the hollow slab, [Φ s ] is the corresponding hinged joint transverse force transmission coefficient matrix when the load is applied to the sth hollow slab; [Ω s ] is the theoretical deflection value of each hollow slab when the load is applied to the sth hollow slab, [Φ t ] is the corresponding hinged joint transverse force transmission coefficient matrix when the load is applied to the t-th hollow slab; [Ω t ] is the theoretical deflection value of each hollow slab when the load is applied to the t-th hollow slab, and [Ω'] is the measured deflection value of each hollow slab when the load is applied to the s-th and t-th hollow slabs.

[0024] In some optional solutions, when the curve formed by the deflection transverse distribution correction value determined based on the deflection transverse distribution correction model and the measured deflection transverse distribution curve are within a set range, the transverse force transmission coefficient of the hinged joint between each two hollow slabs includes:

[0025] Draw the measured curve and theoretical curve of the transverse distribution of deflection of the hollow slab under the same stress state;

[0026] Obtain the maximum deviation position between the measured transverse deflection distribution curve and the theoretical transverse deflection distribution curve, and adjust the transverse force transmission coefficient of the hinged joint corresponding to the maximum deviation position until the curve formed by the corrected transverse deflection distribution value and the measured transverse deflection distribution curve are within the set range.

[0027] In some optional solutions, the measured curve of the lateral distribution of deflection of the hollow slab under the same stress state is obtained, including:

[0028] Use a rated load vehicle to conduct a sports car test loading on each lane of the bridge;

[0029] Measure the deflection value of each hollow slab by hanging a dial indicator or photoelectric deflectometer at the bottom of the beam;

[0030] According to the deflection value of each hollow slab, the measured curve of the lateral distribution of deflection is drawn.

[0031] Some optional solutions for obtaining the theoretical curve of the lateral distribution of deflection of the hollow slab under the same load state include:

[0032] Finite element analysis software was used to build a bridge entity model;

[0033] A sports car test was performed on each lane in the bridge physical model, and the deflection value of each hollow slab was obtained through simulation calculation.

[0034] According to the deflection values ​​of each hollow slab obtained by simulation calculation, the theoretical curve of lateral distribution of deflection is drawn.

[0035] In another aspect, the present invention further provides a hollow slab hinge joint damage assessment device, comprising:

[0036] Deflection curve acquisition module; it is used to obtain the measured curve and theoretical curve of the transverse distribution of deflection of the hollow slab under the same stress state;

[0037] A correction model establishment module is used to establish a correction model for the lateral distribution of deflection based on the relationship between the theoretical value of the lateral distribution of deflection and the correction value of the lateral distribution of deflection and the lateral force transmission coefficient of the hinged joint between every two hollow slabs;

[0038] The force transmission coefficient acquisition module is used to determine the transverse force transmission coefficient of the hinged joint between every two hollow slabs when the curve formed by the deflection transverse distribution correction value and the measured deflection transverse distribution curve are within a set range based on the deflection transverse distribution correction model.

[0039] In another aspect, the present invention further provides a computer device, comprising: the computer device includes a processor, a memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, the steps of the above-mentioned hollow slab hinge joint damage evaluation method are implemented.

[0040] Compared with the existing technology, the advantages of the present invention are: by analyzing the deflection transverse distribution correction curve and the deflection transverse distribution measured curve, the transverse force transmission coefficient of the hinged joint is solved. When the hinged joint is damaged, the force transmission performance decreases and the transverse force transmission coefficient decreases. The actual force transmission performance of the hinged joint is quantitatively judged based on the transverse force transmission coefficient of the hinged joint, the condition of the hollow slab hinged joint is evaluated, and the damage of the hinged joint is analyzed. If the deflection transverse distribution correction curve and the transverse distribution measured curve of the deflection transverse distribution basically coincide, that is, within the set range, the transverse force transmission coefficient is close to 1, indicating that the force transmission performance of the hinged joint is not weakened and the hinged joint is in good condition. The smaller the transverse force transmission coefficient of the hinged joint, the weaker the force transmission performance of the hinged joint, and the hinged joint can be maintained in combination with manual inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 Schematic diagram of the process of the hinged joint damage evaluation method of the hollow slab in an embodiment of the present invention;

[0043] Figure 2 This is a comparative analysis diagram of the lateral distribution of the hollow slab deflection of lane 1 in an embodiment of the present invention;

[0044] Figure 3 This is a comparative analysis diagram of the lateral distribution of the hollow slab deflection in lane 3 in an embodiment of the present invention;

[0045] Figure 4 It is a schematic block diagram of the structure of the computer device involved in the embodiment of the present invention. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0048] like Figure 1 As shown, the present invention provides a method for evaluating damage of hinged joints in hollow slabs, comprising the following steps:

[0049] S1: Obtain the measured curve and theoretical curve of the lateral deflection distribution of the hollow slab under the same stress state.

[0050] In this embodiment, A: obtaining a theoretical curve of the lateral distribution of deflection of the hollow slab under the same stress state includes:

[0051] S11A: Use finite element analysis software to build a bridge solid model.

[0052] like Figure 2 As shown in the figure, in this example, a solid model was created using the finite element software ANSYS. The hollow slab and bridge deck pavement were simulated using 8-node hexahedron solid185 elements. The hinged joint between two adjacent hollow slabs within the thickness of the top slab was treated as a common node. The lateral deflection distribution curve of the hollow slabs with the hinged joint intact was obtained. The stiffness of each hollow slab was essentially consistent, with no significant differences. The lateral load transmission performance of the hinged joint includes the lateral load distribution effect of the bridge deck.

[0053] S12A: A sports car test loading was performed on each lane in the bridge model, and the deflection value of each hollow slab was obtained by simulation calculation.

[0054] S13A: Based on the deflection values ​​of each hollow slab obtained by simulation calculation, a theoretical curve of the lateral distribution of deflection is drawn.

[0055] B: Obtain the measured curve of the lateral deflection distribution of the hollow slab under the same stress state, including:

[0056] S11B: Use a rated load vehicle to conduct sports car test loading on each lane of the bridge.

[0057] During the sports car test, the same loading as in the bridge solid model was used.

[0058] S12B: Measure the deflection value of each hollow slab by hanging a dial indicator or photoelectric deflectometer at the bottom of the beam.

[0059] S13B: Based on the deflection value of each hollow slab, draw the measured curve of the lateral distribution of deflection.

[0060] S2: Based on the relationship between the theoretical value of the lateral distribution of deflection and the modified value of the lateral distribution of deflection, and the lateral force transmission coefficient of the hinged joint between every two hollow slabs, a modified model of the lateral distribution of deflection is established.

[0061] In some optional embodiments, step S2 includes:

[0062] S21: Based on the transverse force transmission coefficient of the hinged joint between every two hollow slabs, a transverse distribution model of the internal force of the hollow slabs is established, which includes the theoretical value of the transverse distribution of the internal force of the hollow slabs and the transverse distribution value of the damage internal force of the hollow slabs.

[0063] The lateral distribution model of the damage internal force is:

[0064]

[0065] Among them, φ k is the transverse force transmission coefficient of the hinged joint between the kth hollow slab and the k+1th hollow slab, n is the number of hollow slabs, q k is the internal force of the kth hollow slab before hinged joint damage, q′ k is the internal force of the kth hollow slab after hinged joint damage.

[0066] Simplify the above damage internal force lateral distribution model [Φ k ][Q k ]=[Q' k ],[Φ k ] is the hinged joint transverse force transmission coefficient matrix, [Q k ] is the internal force matrix of the hollow slab before hinged joint damage, [Q' k ] is the internal force matrix of the hollow slab after hinged joint damage.

[0067] When the wheel load acts on the hollow slab No. s and the hollow slab No. t respectively, the theoretical internal forces of the hollow slabs before the hinged joint is damaged are [Q s ] and [Q t ], then according to [Φ k ][Q k ]=[Q' k ],get:

[0068] [Φ s][Q s ]+[Φ t ][Q t ]=[Q']

[0069] According to actual conditions, the wheelbase of a car is generally 1.8m, and the width of a hollow slab is generally 0.99 to 1.2m. The car load may act on two adjacent hollow slabs (hollow slab No. k and hollow slab No. k+1), or on two hollow slabs arranged at intervals (hollow slab No. k and hollow slab No. k+2), which can simplify the calculation.

[0070] In this example, the load acts on slab k, and the hinged joint transverse force transmission coefficient φ ranges from 0 to 1. A larger φ indicates better hinged joint force transmission performance. φ = 1 indicates no loss of hinged joint force transmission performance, and φ = 0 indicates complete failure of hinged joint force transmission performance. A hollow slab bridge has n hollow slabs arranged transversely. Hinge joint 1# is between slabs 1 and 2, hinge joint 2# is between slabs 2 and 3, and hinge joint n-1 is between slabs n-1 and n. The corresponding hinged joint transverse force transmission coefficients are φ1, φ2, ...φ, respectively. n-1 .

[0071] S22: Based on the relationship between the internal force and deflection of the hollow slab, an internal force-deflection relationship model is established.

[0072] When the span, cross-section arrangement, and material properties of the bridge structure are constant, the mid-span deflection is proportional to the internal force of the hollow slab:

[0073] q∝ω

[0074] Where q is the lateral internal force and ω is the deflection.

[0075] The lateral distribution of internal force of each hollow slab can be expressed by deflection, that is, the internal force-deflection relationship model is:

[0076]

[0077] Among them, c(E k ,I k ,L k ) is the relationship coefficient between the internal force and deflection of the kth hollow slab, q k is the internal force of the kth hollow slab before hinged joint damage, ω k is the kth hollow slab at q before hinged joint damage k Deflection under internal forces.

[0078] It can be simplified as: [Q] = [C(E,I,L)][Ω], where [Q] is the hollow slab internal force matrix, and C(E,I,L) is the coefficient matrix of the relationship between the internal force and deflection of the hollow slab. When the span, cross-sectional layout, and material properties of the bridge structure are constant, C(E,I,L) is a constant and its element values ​​are equal.

[0079] S23: Based on the lateral force transmission coefficient of the hinged joint between every two hollow slabs, the damage internal force lateral distribution model and the internal force-deflection relationship model, a deflection lateral distribution correction model is established, which includes the theoretical value of the deflection lateral distribution and the correction value of the deflection lateral distribution.

[0080] The functional relationship between the lateral distribution of load and the lateral force transmission coefficient of the hinged joint is converted into the functional relationship between the lateral distribution of deflection and the lateral force transmission coefficient of the hinged joint. The relationship between the theoretical value and the corrected value of the lateral distribution of deflection of the hollow slab is as follows, that is, the corrected model of the lateral distribution of deflection is:

[0081] [Φ s ][C(E,I,L)][Ω s ]+[Φ t ][C(E,I,L)][Ω t ]=[C(E,I,L)][Ω']

[0082] Among them, C(E,I,L) is the coefficient matrix of the relationship between the internal force and deflection of the hollow slab, [Φ s ] is the corresponding hinged joint transverse force transmission coefficient matrix when the load is applied to the sth hollow slab; [Ω s ] is the theoretical deflection value of each hollow slab when the load is applied to the sth hollow slab, [Φ t ] is the corresponding hinged joint transverse force transmission coefficient matrix when the load is applied to the t-th hollow slab; [Ω t ] is the theoretical deflection value of each hollow slab when the load is applied to the tth hollow slab, is the measured deflection value of each hollow slab when the load is applied to the sth and tth hollow slabs.

[0083] S3: Based on the deflection transverse distribution correction model, determine the transverse force transmission coefficient of the hinged joint between every two hollow slabs when the curve formed by the deflection transverse distribution correction value and the measured transverse deflection distribution curve are within the set range.

[0084] In some optional embodiments, step S3 includes:

[0085] S31: Draw the measured curve and theoretical curve of the lateral distribution of deflection of the hollow slab under the same stress state.

[0086] S32: Obtain the maximum deviation position between the measured transverse deflection distribution curve and the theoretical transverse deflection distribution curve, and adjust the transverse force transmission coefficient of the hinged joint corresponding to the maximum deviation position until the curve formed by the corrected transverse deflection distribution value and the measured transverse deflection distribution curve are within a set range.

[0087] Furthermore, because the load has the greatest impact on the nearest hollow-core slab, load tests were conducted on each lane to obtain measured lateral deflection distribution curves corresponding to different lane loads. Similarly, a sports car test was conducted on each lane in the bridge model to obtain theoretical lateral deflection distribution curves corresponding to different lane loads. This calculation can determine the lateral force transmission coefficient of the hinged joint corresponding to different lane loads, making it easier to determine the location of hinged joint damage.

[0088] In a specific embodiment, on a bridge with four lanes, the theoretical curve of lateral deflection distribution, the modified curve of lateral deflection distribution, and the measured curve of lateral deflection distribution are all fitted curves. When the load is applied to the first lane, as shown in FIG. Figure 2 As shown; the load is applied to lane 3, as Figure 3 According to the fitting curve, the internal forces between plates 7 and 8, and between plates 10 and 11 cannot be fully transmitted. The transverse force transmission coefficients of the hinged joint 7# and 10# are 0.80 and 0.75, respectively, indicating damage to the hinged joint 7# and 10#. The transverse force transmission coefficients of the other hinged joints range from 0.90 to 0.98, indicating good force transmission performance.

[0089] In addition, based on the appearance of defects in the hinged joints of the corresponding bridge spans (whether there are cracks in the pavement layer at the hinged joints, whitening due to water seepage at the hinged joints, etc.), the following five levels are given as the evaluation criteria for the technical condition of hinged joints:

[0090] ① The lateral force transmission coefficient of the hinged joint is in the range of (0.95, 1], and the hinged joint is in good condition;

[0091] ② The transverse force transmission coefficient of the hinged joint is in the range of (0.85, 0.95]. The hinged joint is slightly damaged and can still meet the use requirements and can be repaired for durability.

[0092] ③ The lateral force transmission coefficient of the hinged joint is in the range of (0.75, 0.85], indicating moderate hinged joint damage. Monitor the damaged hinged joint for defects, reconstruct the damaged bridge deck pavement and waterproofing layer, and strengthen the vertical connection between the bridge deck pavement and the slab beam if necessary.

[0093] ④ If the transverse force transmission coefficient of the hinged joint is in the range of (0.6, 0.75), the hinged joint is severely damaged. Strengthen the vertical connection between the bridge deck pavement and the slab beam at the damaged hinged joint, redo the bridge deck pavement and waterproofing layer, and reinforce the hinged joint if necessary.

[0094] ⑤ The lateral force transmission coefficient of the hinged joint is in the range of [0, 0.6], and the hinged joint is damaged and ineffective. The damaged hinged joint should be reinforced, the upper and lower connections between the bridge deck pavement and the slab beam should be strengthened, and the bridge deck pavement and waterproof layer should be redone.

[0095] In addition, the present invention also provides a hollow slab hinge joint damage assessment device, comprising: a deflection curve acquisition module, a correction model establishment module and a force transmission coefficient acquisition module.

[0096] Among them, the deflection curve acquisition module is used to obtain the measured deflection lateral distribution curve and the theoretical deflection lateral distribution curve of the hollow slab under the same stress state; the correction model establishment module is used to establish a deflection lateral distribution correction model based on the relationship between the theoretical value of the deflection lateral distribution and the correction value of the deflection lateral distribution and based on the lateral force transmission coefficient of the hinged joint between each two hollow slabs; the force transmission coefficient acquisition module is used to determine the lateral force transmission coefficient of the hinged joint between each two hollow slabs when the curve formed by the correction value of the deflection lateral distribution and the measured deflection lateral distribution curve are within a set range based on the deflection lateral distribution correction model.

[0097] In summary, when hinged joints are damaged, their force transmission performance deteriorates and their transverse force transmission coefficient decreases. By analyzing the modified transverse deflection distribution curve with the measured transverse deflection distribution curve, the transverse force transmission coefficient of the hinged joint is calculated. This transverse force transmission coefficient quantitatively determines the actual force transmission performance of the hinged joint, allowing for evaluation of the hinged joint condition in hollow slabs and analysis of hinged joint damage. If the modified transverse deflection distribution curve and the measured transverse deflection distribution curve are substantially aligned, meaning that the transverse force transmission coefficients are close to 1 within the specified range, this indicates that the force transmission performance of the hinged joint is intact and the joint is in good condition. A smaller transverse force transmission coefficient indicates weaker force transmission performance, and manual inspection can be combined with maintenance work on the hinged joint.

[0098] In another aspect, a computer device comprises: the computer device comprises a processor, a memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, the steps of the hollow slab hinge joint damage evaluation method as described above are implemented.

[0099] It should be noted that those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and modules and units can refer to the corresponding processes in the aforementioned embodiments and will not be repeated here.

[0100] The apparatus provided in the above embodiment can be implemented in the form of a computer program. The computer program can be used in Figure 4 Runs on the computer equipment shown.

[0101] See also Figure 4 , Figure 4 This is a schematic block diagram of the structure of a computer device provided in an embodiment of the present application. The computer device may be a terminal.

[0102] like Figure 4 As shown, the computer device includes a processor, a memory, and a network interface connected via a system bus, wherein the memory may include a non-volatile storage medium and an internal memory.

[0103] The non-volatile storage medium can store an operating system and a computer program. The computer program includes program instructions, and when the program instructions are executed, the processor can execute any one of the hollow slab hinge joint damage assessment methods.

[0104] The processor is used to provide computing and control capabilities and support the operation of the entire computer equipment.

[0105] The internal memory provides an environment for the operation of the computer program in the non-volatile storage medium. When the computer program is executed by the processor, the processor can execute any one of the hollow slab hinge joint damage assessment methods.

[0106] The network interface is used for network communication, such as sending assigned tasks, etc. Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0107] It should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0108] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0109] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0110] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A method for evaluating damage of hinged joints in hollow slabs, characterized in that: The following steps are involved: Obtain the measured curve and theoretical curve of the transverse distribution of deflection of the hollow slab under the same stress state; According to the relationship between the theoretical value of the lateral distribution of deflection and the modified value of the lateral distribution of deflection, and based on the lateral force transmission coefficient of the hinged joint between every two hollow slabs, a modified model for the lateral distribution of deflection is established, which includes: According to the transverse force transmission coefficient of the hinged joint between every two hollow slabs, a transverse distribution model of internal force of hollow slabs is established, which is based on the theoretical value of transverse distribution of internal force of hollow slabs and the transverse distribution value of damage internal force of hollow slabs. According to the relationship between the internal force and deflection of the hollow slab, the internal force-deflection relationship model is established; Based on the transverse force transmission coefficient of the hinged joint between every two hollow slabs, the damage internal force transverse distribution model and the internal force-deflection relationship model, a deflection transverse distribution correction model is established, which includes the theoretical value of the deflection transverse distribution and the deflection transverse distribution correction value. According to the deflection transverse distribution correction model, the transverse force transmission coefficient of the hinged joint between each two hollow slabs is determined when the curve formed by the deflection transverse distribution correction value and the measured transverse deflection distribution curve are within the set range, including: Draw the measured curve and theoretical curve of the transverse distribution of deflection of the hollow slab under the same stress state; Obtain the maximum deviation position between the measured transverse deflection distribution curve and the theoretical transverse deflection distribution curve, and adjust the transverse force transmission coefficient of the hinged joint corresponding to the maximum deviation position until the curve formed by the corrected transverse deflection distribution value and the measured transverse deflection distribution curve are within the set range.

2. The hollow slab hinge joint damage assessment method according to claim 1, wherein: The lateral distribution model of the damage internal force is: in, For the k Hollow slab and k +1 Transverse force transmission coefficient of hinged joint between hollow slabs, n is the number of hollow core slabs, The first k Internal force of a hollow slab, After hinge injury k Internal forces of hollow slabs.

3. The hollow slab hinge joint damage assessment method according to claim 1, wherein: The internal force-deflection relationship model is: in, For the k The relationship coefficient between the internal force and deflection of a hollow slab, The first k Internal force of a hollow slab, The first k Hollow slabs in Deflection under internal forces.

4. The hollow slab hinge joint damage assessment method according to claim 1, wherein: The deflection lateral distribution correction model is: in, is the coefficient matrix of the relationship between the internal force and deflection of the hollow slab, The load is applied to s The corresponding hinged joint transverse force transmission coefficient matrix when there are two hollow slabs; The load is applied to s The theoretical deflection value corresponding to each hollow slab is The load is applied to t The corresponding hinged joint transverse force transmission coefficient matrix when there are two hollow slabs; The load is applied to t The theoretical deflection value corresponding to each hollow slab is For the load to be applied to s Block and t The measured deflection values ​​corresponding to each hollow slab are as follows:

5. The hollow slab hinge joint damage assessment method according to claim 1, wherein: Obtain the measured curve of the lateral deflection distribution of the hollow slab under the same stress state, including: Use a rated load vehicle to conduct a sports car test loading on each lane of the bridge; Measure the deflection value of each hollow slab by hanging a dial indicator or photoelectric deflectometer at the bottom of the beam; According to the deflection value of each hollow slab, the measured curve of the lateral distribution of deflection is drawn.

6. The hollow slab hinge joint damage assessment method according to claim 1, wherein: Obtain the theoretical curve of the lateral deflection distribution of the hollow slab under the same stress state, including: Finite element analysis software was used to build a bridge entity model; A sports car test was performed on each lane in the bridge physical model, and the deflection value of each hollow slab was obtained through simulation calculation. According to the deflection values ​​of each hollow slab obtained by simulation calculation, the theoretical curve of lateral distribution of deflection is drawn.

7. A hollow slab hinge joint damage assessment device, characterized in that: include: Deflection curve acquisition module; it is used to obtain the measured curve and theoretical curve of the transverse distribution of deflection of the hollow slab under the same stress state; The correction model establishment module is used to establish a correction model for the lateral distribution of deflection based on the relationship between the theoretical value of the lateral distribution of deflection and the correction value of the lateral distribution of deflection, and based on the lateral force transmission coefficient of the hinged joint between each two hollow slabs. It includes: According to the transverse force transmission coefficient of the hinged joint between every two hollow slabs, a transverse distribution model of internal force of hollow slabs is established, which is based on the theoretical value of transverse distribution of internal force of hollow slabs and the transverse distribution value of damage internal force of hollow slabs. According to the relationship between the internal force and deflection of the hollow slab, the internal force-deflection relationship model is established; Based on the transverse force transmission coefficient of the hinged joint between every two hollow slabs, the damage internal force transverse distribution model and the internal force-deflection relationship model, a deflection transverse distribution correction model is established, which includes the theoretical value of the deflection transverse distribution and the deflection transverse distribution correction value. The force transmission coefficient acquisition module is used to determine the transverse force transmission coefficient of the hinged joint between each two hollow slabs when the curve formed by the deflection transverse distribution correction value and the measured deflection transverse distribution curve are within a set range based on the deflection transverse distribution correction model, including: Draw the measured curve and theoretical curve of the transverse distribution of deflection of the hollow slab under the same stress state; Obtain the maximum deviation position between the measured transverse deflection distribution curve and the theoretical transverse deflection distribution curve, and adjust the transverse force transmission coefficient of the hinged joint corresponding to the maximum deviation position until the curve formed by the corrected transverse deflection distribution value and the measured transverse deflection distribution curve are within the set range.

8. A computer device, characterized in that: include: The computer device includes a processor, a memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, the steps of the hollow slab hinge joint damage assessment method according to any one of claims 1 to 6 are implemented.

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