System and method for calculating tensile bearing capacity of cross steel plate joint of diaphragm wall

Abstract

The invention discloses a system and a method for calculating the tensile bearing capacity of a cross steel plate joint of an underground diaphragm wall. The method comprises the steps that a failure mode is determined according to the tensile bearing capacity of concrete between wing plates of the cross-shaped steel plate connector and the interaction force of the concrete between the wing plates of the cross-shaped steel plate connector; calculating the tensile bearing capacity of the cross steel plate joint of the diaphragm wall according to the failure mode, the normal cohesive force between the steel plate and the concrete, the shearing resistance of the concrete in the hole of the cross steel plate joint and the tangential cohesive force between the steel plate and the concrete; by utilizing the method, the problem that the failure mechanism is fuzzy in the prior art can be solved, the calculation is more suitable for an actual engineering failure mode, and the subsequent bearing capacity calculation is more suitable for an actual failure mechanism; according to different damage modes, the normal cohesive force, the shearing resistance, the tangential cohesive force and other sub-items are accurately split through a formula, and the one-sidedness of a traditional single formula is avoided; and due to a standardized calculation formula and modular system design, the efficiency and reliability of diaphragm wall joint design are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the fields of foundation pit engineering and hydropower engineering, and in particular to a calculation system and method for the tensile bearing capacity of a cross steel plate joint of a ground-connected wall. Background Art

[0002] With the acceleration of urbanization and the rapid development of urban rail transit, ground-connected walls, due to their high stiffness and excellent anti-seepage properties, have become an indispensable key support structure in urban rail transit construction, playing a particularly crucial role in dense urban environments. They support underground spaces, prevent soil collapse, and can also serve as retaining walls or waterproof walls. Ground-connected walls are typically constructed from multiple prefabricated panels connected by carefully designed joints to form a continuous wall structure. These joints not only connect the panels but also transmit shear forces and withstand internal stresses within the wall.

[0003] Cross-plate joints are a widely used joint type in underground diaphragm wall construction. They offer rigid connections and excellent water-stopping properties, effectively transmitting shear forces and bending moments, enhancing the overall rigidity and stability of the underground diaphragm wall while effectively preventing groundwater seepage. When loads fluctuate or uneven foundation settlement occurs, different sections of the diaphragm wall may experience vertical displacement, while horizontal displacement may also generate tensile stress between different trench sections. However, current domestic and international standards and specifications do not yet include a method for calculating the tensile bearing capacity of diaphragm walls using cross-plate joints. Failure to know the tensile bearing capacity in advance can lead to the following problems: 1. Designers face difficulty determining appropriate joint dimensions, plate thickness, and connection methods when designing the ground-connected wall. This can lead to insufficient tensile strength, cracks, or even fractures at the joints, affecting the overall stability of the ground-connected wall and posing safety risks to the project. 2. During construction, it can be difficult for construction personnel to maintain the quality standards for the cross-plate joints and to implement strict control based on accurate calculations. This can result in inconsistent joint quality and affect the overall performance of the ground-connected wall. 3. During project acceptance, without an accurate calculation method, it is difficult to determine through testing whether the tensile bearing capacity of the cross-plate joints meets the design requirements, preventing the timely detection of potential quality issues. 4. During ground-connected wall maintenance, it is difficult to accurately determine when joints require inspection, repair, or reinforcement, potentially missing the optimal time for maintenance and worsening problems. 5. When the surrounding environment changes or new construction projects occur nearby, it is difficult to accurately assess the safety of the ground-connected wall structure based on the actual tensile bearing capacity of the cross-plate joints used in the ground-connected wall, providing a scientific basis for decision-making. Summary of the Invention

[0004] In order to solve the problems raised by the background technology, the present invention proposes a calculation system and method for the tensile bearing capacity of the cross steel plate joints of the ground-connected wall.

[0005] A system for calculating the tensile bearing capacity of a cross steel plate joint of a ground-connected wall to achieve one of the objectives of the present invention comprises:

[0006] Failure mode determination module: used to determine the failure mode based on the tensile bearing capacity of the concrete between the wing plates of the cross steel plate joint and the interaction force between the concrete between the wing plates of the cross steel plate joint; the failure mode is used to determine the location where the concrete cracks between the wing plates may occur;

[0007] Bearing capacity calculation module: used to calculate the tensile bearing capacity of the cross steel plate joints of the ground-connected wall based on the failure mode, the normal bond strength between the steel plate and the concrete, the shear resistance of the concrete inside the cross steel plate joint holes, and the tangential bond strength between the steel plate and the concrete.

[0008] Furthermore, the following limitations are also imposed on the morphology of the cross steel plate joints of the ground-connected wall when they are subjected to tension failure:

[0009] ① When the tensile force applied to the cross-plate joint specimen reaches its bearing capacity limit, the failure characteristics are manifested as the concrete on one side of the web of the cross-plate joint being cracked, and two different failure modes may occur, among which the concrete cracks between the flanges may occur at the web or at the edge of the flange.

[0010] ② The failure characteristics are all concrete cracking on one side of the cross steel plate rather than yielding of the steel plate itself.

[0011] Furthermore, when the tensile bearing capacity of the concrete between the wing plates of the cross steel plate joint is less than or equal to the concrete interaction force between the wing plates of the cross steel plate joint, the failure mode is the first failure mode, indicating that the concrete cracks between the wing plates are located at the edges of the wing plates; when the tensile bearing capacity of the concrete between the wing plates of the cross steel plate joint is greater than the concrete interaction force between the wing plates of the cross steel plate joint, the failure mode is the second failure mode, indicating that the concrete cracks between the wing plates are located at the web.

[0012] Furthermore, the tensile strength of the concrete between the flanges of the cross steel plate joint is F t The calculation methods include:

[0013] F t =f t ·S w

[0014] Where, f t is the axial tensile strength of concrete; S w is the concrete cross-sectional area between the cross steel plate wings.

[0015] Interaction force F between the flanges of the cross steel plate joint and the concrete i The calculation methods include:

[0016]

[0017] Where, t n is the normal bond strength of the steel plate concrete interface; S w f is the concrete cross-sectional area between the cross steel plate wings; c ' is the axial compressive strength of cylindrical concrete specimen; S h is the hole area of the wing plate; k e is the influence coefficient of steel plate surface roughness; S t is the tangential bonding area between steel plate and concrete; f t is the axial tensile strength of concrete.

[0018] Furthermore, when the failure mode is the first failure mode, the calculation method of the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall includes:

[0019] The normal bond force F1 between the steel plate and concrete is determined based on the normal bond area between the web and concrete and the cross-sectional area of the concrete between the cross steel plate flanges;

[0020] Determine the shear resistance F2 of the concrete inside the hole of the cross steel plate joint according to the hole area of the flange;

[0021] Determine the tangential bonding force F3 between the steel plate and concrete based on the tangential bonding area between the steel plate and concrete;

[0022] Determine the tensile bearing capacity F of the concrete between the steel plates according to the cross-sectional area of the concrete between the cross steel plates t ;

[0023] According to the normal bond force F1 between steel plate and concrete, the shear force F2 of the concrete inside the cross steel plate joint hole, the tangential bond force F3 between steel plate and concrete, and the tensile bearing capacity F t Calculate the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall; the calculation method includes: Q1=F1+F2+F3+F t .

[0024] Furthermore, when the failure mode is the second failure mode, the calculation method of the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall includes:

[0025] The normal bonding force F1 between the steel plate and concrete is determined based on the normal bonding area between the web and the concrete;

[0026] Determine the shear resistance F2 of the concrete inside the hole of the cross steel plate joint according to the hole area of the flange;

[0027] Determine the tangential bonding force F3 between the steel plate and concrete based on the tangential bonding area between the steel plate and concrete;

[0028] The tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall is calculated based on the normal bond force F1 between the steel plate and the concrete, the shear force F2 of the concrete inside the cross steel plate joint hole, and the tangential bond force F3 between the steel plate and the concrete. The calculation method includes: Q1 = F1 + F2 + F3.

[0029] Furthermore, the calculation method of the normal bond force F1 between the steel plate and the concrete includes: when the failure mode is the first failure mode, F1 = t n ·(S n -S w ); When the failure mode is the second failure mode, F1 = t n ·S n ;t n is the normal bond strength of the steel plate concrete interface; S n is the normal bonding area between the web and the concrete; S w is the concrete cross-sectional area between the cross steel plate wings.

[0030] Furthermore, the calculation method of the shear resistance F2 of the concrete inside the hole of the cross steel plate joint includes: f c ' is the axial compressive strength of cylindrical concrete specimen; S h is the wing plate hole area.

[0031] Furthermore, the calculation method of the tangential bond force F3 between the steel plate and the concrete includes: F3 = 0.3585k e ·S t 0.92 ·f t 0.1 ;k e is the influence coefficient of steel plate surface roughness; S t is the tangential bonding area between steel plate and concrete; f t is the axial tensile strength of concrete.

[0032] In certain technical solutions, when the failure mode is the first failure mode, the calculation method of the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall includes:

[0033]

[0034] Where, t n is the normal bond strength of the steel plate concrete interface; S n is the normal bonding area between the web and the concrete; S w f is the concrete cross-sectional area between the cross steel plate wings; c ' is the axial compressive strength of cylindrical concrete specimen; S h is the hole area of the wing plate; k e is the influence coefficient of steel plate surface roughness; St is the tangential bonding area between steel plate and concrete; f t is the axial tensile strength of concrete.

[0035] In certain technical solutions, when the failure mode is the second failure mode, the method for calculating the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall includes:

[0036]

[0037] Where, t n is the normal bond strength of the steel plate concrete interface; S n is the normal bonding area between the web and the concrete; f c ' is the axial compressive strength of cylindrical concrete specimen; S h is the hole area of the wing plate; k e is the influence coefficient of steel plate surface roughness; S t is the tangential bonding area between steel plate and concrete; f t is the axial tensile strength of concrete.

[0038] A method for calculating the tensile bearing capacity of a cross steel plate joint of a ground-connected wall to achieve the second object of the present invention includes:

[0039] The failure mode is determined based on the concrete tensile bearing capacity between the flanges of the cross steel plate joint and the concrete interaction force between the flanges of the cross steel plate joint;

[0040] The tensile bearing capacity of the cross steel plate joint of the ground-connected wall is calculated based on the failure mode, the normal bond strength between the steel plate and the concrete, the shear resistance of the concrete inside the hole of the cross steel plate joint, and the tangential bond strength between the steel plate and the concrete.

[0041] The beneficial effects of the present invention include:

[0042] This invention solves the problem of ambiguous failure mechanisms in the prior art by first classifying tensile failure of cross-plate joints into two types of failure modes (concrete cracks located at the web or at the edge of the flange), making the calculation more consistent with actual engineering failure modes and subsequent bearing capacity calculations more consistent with actual failure mechanisms, avoiding errors caused by a unified model.

[0043] According to different failure modes, the normal bond strength, shear strength, tangential bond strength and other sub-items are accurately decomposed through formulas to avoid the one-sidedness of traditional single formulas;

[0044] Standardized calculation formulas and modular system design support rapid parameter input and bearing capacity output, significantly improving the efficiency and reliability of ground-to-wall joint design and possessing wide industry application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1This is a flow chart of a method for calculating the tensile bearing capacity of a cross steel plate joint in a ground-connected wall;

[0046] Figure 2 This is a schematic diagram of the cross steel plate joint structure;

[0047] 1-web; 2-wing plate; 3-hole. DETAILED DESCRIPTION

[0048] The following specific embodiments are provided to explain the technical solutions of the present invention so that those skilled in the art can understand the present invention. The scope of protection of the present invention is not limited to the specific implementation structures described below. Any implementation schemes created by those skilled in the art that include the technical solutions of the present invention but differ from the following specific implementation schemes are also within the scope of protection of the present invention.

[0049] An embodiment of the present invention provides a method for calculating the tensile bearing capacity of a cross steel plate joint of a lattice-type ground-connected wall, comprising the following steps:

[0050] The tensile bearing capacity F of the concrete between the flanges of the cross steel plate joint is calculated according to the following formula (1): t :

[0051] F t =f t ·S w Formula (1)

[0052] The concrete interaction force F between the flanges of the cross steel plate joint is calculated according to the following formula (2): i :

[0053]

[0054] If F is satisfied t ≤F i , the ultimate tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall when the cross steel plate joint is used is calculated according to the following formula (3):

[0055]

[0056] If F is satisfied t >F i , then the ultimate tensile bearing capacity Q1 of the ground-connected wall using a cross steel plate joint is calculated according to the following formula (4):

[0057]

[0058] The corresponding parameters in the formula are:

[0059] F t is the tensile bearing capacity of the concrete between the flanges of the cross steel plate joint, in kN;

[0060] F iThe concrete interaction force between the flanges of the cross steel plate joint is in kN;

[0061] f t is the axial tensile strength of concrete, in MPa;

[0062] S w is the cross-sectional area of concrete between the cross steel plate wings, in mm 2 .

[0063] t n is the normal bond strength of the steel plate concrete interface, in MPa;

[0064] S n Normal bonding area between web and concrete, i.e., the part of the contact surface perpendicular to the bonding direction (normal direction) between steel plate and concrete where the steel plate and concrete are in actual close contact and can generate effective bonding force. It does not include ineffective contact areas caused by construction defects (such as bubbles, voids, insufficiently vibrated and compacted areas), surface impurities, etc., and the unit is mm. 2 ;

[0065] f c ' is the axial compressive strength of cylindrical concrete specimen, in MPa;

[0066] S h is the area of the wing hole, in mm 2

[0067] k e is the influence coefficient of steel plate surface roughness, dimensionless unit;

[0068] S t It is the bonding area between steel plate and concrete, i.e. net area of flange, in mm 2 ;

[0069] Q1 is the ultimate tensile bearing capacity, in kN;

[0070] The data processing steps are:

[0071] 1) Determine the normal bond strength t at the interface between the steel plate and concrete based on the surface roughness of the cross steel plate joint steel n and steel plate surface roughness influence coefficient k e , t n It is related to the roughness of the steel plate. When the steel plate surface is not treated, k e Take 1.0; when the steel plate is corroded, k e Take 1.1.

[0072] 2) Determine the flange area and flange hole area S of the cross steel plate joint h , cross-sectional area of concrete between cross steel plate wings Sw ,like Figure 2 shown.

[0073] 3) The failure mode of the cross steel plate joint of the ground-connected wall when it reaches the ultimate tensile bearing capacity is determined by formulas (1) to (2). The failure modes include: the first failure mode: the concrete cracks between the flanges are located at the flange edges; the second failure mode: the concrete cracks between the flanges are located at the web.

[0074] 4) According to the different failure modes, formula (3) or formula (4) is used to obtain the ultimate tensile bearing capacity of the cross steel plate joint of the ground-connected wall under the corresponding failure mode; when the failure mode is the first failure mode, formula (3) is used for calculation, otherwise formula (4) is used for calculation.

[0075] The embodiment of the present invention also provides another method for calculating the tensile bearing capacity of a cross steel plate joint of a lattice-type ground-connected wall, comprising the following steps:

[0076] In this example, the ground-connected wall is constructed with C30 concrete grade and connected using double-cross steel plates with untreated surfaces. The side of the flange without the stiffener is 800 mm long and 800 mm wide, with four rows of 16 square holes measuring 120 mm x 120 mm, with a clear spacing of 300 mm across the channel width. The web is 1200 mm long and 800 mm wide, with no openings.

[0077] Step 1: Since the surface of the cross steel plate is not treated, determine the normal bond strength t at the interface between steel and concrete n =0.4MPa;

[0078] Steel plate surface roughness influence coefficient k e =1.0.

[0079] Step 2: In the embodiment, the double cross steel plate joint has a web area of 1200mm long × 800mm wide = 0.96m 2 The area of the flange is 800mm long × 800mm wide = 0.64m on the side without stiffener. 2 , wing plate hole area S h The number of square holes is 16 × the size of the square hole is 120mm × 120mm ≈ 0.23m 2 , net area of wing plate S t = Wing plate area minus the area of the hole in the wing plate S h =0.41m 2 , concrete cross-sectional area S between cross steel plate flanges w = Wing width 800mm × Net spacing in the groove width direction 300mm = 0.24m 2 ;f c '、f t Obtain values according to the specification.

[0080] Step 3: Determine the failure mode of the cross steel plate joint of the ground-connected wall when it is under tension using formulas (1) to (2).

[0081] F t =f t ·S w =2.01×0.24MN=482kN

[0082]

[0083] Step 4: Obtain the ultimate tensile bearing capacity of the cross steel plate joint of the ground-connected wall under the corresponding failure mode using formulas (3) and (4).

[0084] Because F t ≤F i , at this time the failure mode is the first failure mode, so the calculation method of the ultimate tensile bearing capacity of the cross steel plate joint at this time adopts formula (3), that is:

[0085]

[0086] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0087] An embodiment of the present invention further provides a system for calculating the tensile bearing capacity of a cross steel plate joint of a ground-connected wall, comprising:

[0088] Failure mode determination module: used to determine the failure mode based on the concrete tensile bearing capacity between the wing plates of the cross steel plate joint and the concrete interaction force between the wing plates of the cross steel plate joint;

[0089] Bearing capacity calculation module: used to calculate the tensile bearing capacity of the cross steel plate joints of the ground-connected wall based on the failure mode, the normal bond strength between the steel plate and the concrete, the shear resistance of the concrete inside the cross steel plate joint holes, and the tangential bond strength between the steel plate and the concrete.

[0090] In certain embodiments, a method of determining a failure mode includes:

[0091] When the tensile bearing capacity of the concrete between the wing plates of the cross steel plate joint is less than or equal to the concrete interaction force between the wing plates of the cross steel plate joint, the failure mode is the first failure mode.

[0092] In certain embodiments, when the failure mode is the first failure mode, the method for calculating the tensile bearing capacity of the concrete between the flanges of the cross steel plate joint includes:

[0093] The normal bond strength between the steel plate and concrete is determined based on the normal bond area between the web and concrete and the cross-sectional area of the concrete between the cross steel plate flanges;

[0094] Determine the shear resistance of the concrete inside the holes of the cross steel plate joint according to the hole area of the flange plate;

[0095] The tangential bonding force between the steel plate and the concrete is determined based on the tangential bonding area between the steel plate and the concrete;

[0096] Determine the tensile bearing capacity of the concrete between the steel plates according to the cross-sectional area of the concrete between the cross steel plates;

[0097] The sum of the normal bond force between the steel plate and the concrete, the shear force of the concrete inside the hole of the cross steel plate joint, the tangential bond force between the steel plate and the concrete, and the tensile bearing capacity of the concrete between the steel plates is the tensile bearing capacity of the concrete between the wing plates of the cross steel plate joint.

[0098] In certain embodiments, when the failure mode is the first failure mode, the method for calculating the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall includes:

[0099]

[0100] Where, t n is the normal bond strength of the steel plate concrete interface; S n is the normal bonding area between the web and the concrete; S w f is the concrete cross-sectional area between the cross steel plate wings; c ' is the axial compressive strength of cylindrical concrete specimen; S h is the hole area of the wing plate; k e is the influence coefficient of steel plate surface roughness; S t is the tangential bonding area between steel plate and concrete; f t is the axial tensile strength of concrete.

[0101] In some embodiments, the method of determining a failure mode further comprises:

[0102] When the tensile bearing capacity of the concrete between the wing plates of the cross steel plate joint is greater than the interaction force between the concrete between the wing plates of the cross steel plate joint, the failure mode is the second failure mode.

[0103] In certain embodiments, when the failure mode is the second failure mode, the method for calculating the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall includes:

[0104] The normal bond strength between the steel plate and concrete is determined based on the normal bond area between the web and concrete;

[0105] Determine the shear resistance of the concrete inside the holes of the cross steel plate joint according to the hole area of the flange plate;

[0106] The tangential bonding force between the steel plate and the concrete is determined based on the tangential bonding area between the steel plate and the concrete;

[0107] The sum of the normal bond force between the steel plate and the concrete, the shear force of the concrete inside the cross steel plate joint hole, and the tangential bond force between the steel plate and the concrete is the tensile bearing capacity of the concrete between the wing plates of the cross steel plate joint.

[0108] In certain embodiments, when the failure mode is the second failure mode, the method for calculating the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall includes:

[0109]

[0110] Where:

[0111] t n is the normal bond strength of the steel plate concrete interface;

[0112] S n is the normal bonding area between the web and the concrete;

[0113] f c ' is the axial compressive strength of cylindrical concrete specimen;

[0114] S h is the area of the wing hole;

[0115] k e is the influence coefficient of steel plate surface roughness;

[0116] S t is the tangential bonding area between the steel plate and the concrete;

[0117] f t is the axial tensile strength of concrete.

[0118] The embodiment of the present invention further provides a method for calculating the tensile bearing capacity of a cross steel plate joint of a ground-connected wall, comprising:

[0119] The failure mode is determined based on the concrete tensile bearing capacity between the flanges of the cross steel plate joint and the concrete interaction force between the flanges of the cross steel plate joint;

[0120] The tensile bearing capacity of the cross steel plate joint of the ground-connected wall is calculated based on the failure mode, the normal bond strength between the steel plate and the concrete, the shear resistance of the concrete inside the hole of the cross steel plate joint, and the tangential bond strength between the steel plate and the concrete.

[0121] An embodiment of the present invention further provides a non-transitory computer-readable storage medium, which stores a computer program. The computer program includes program instructions, which implement the various steps of the method described in the present invention when executed by a processor, and will not be repeated here.

[0122] The computer-readable storage medium may be the data transmission device provided in any of the aforementioned embodiments or an internal storage unit of a computer device, such as a hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., provided on the computer device.

[0123] Furthermore, the computer-readable storage medium may include both an internal storage unit of the computer device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the computer device. The computer-readable storage medium may also be used to temporarily store data to be output or that has been output.

[0124] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0125] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0126] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0127] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0128] An embodiment of the present invention further provides a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the steps of the method for calculating the tensile bearing capacity of the cross steel plate joint of the ground-connected wall.

[0129] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A calculation system for the tensile bearing capacity of the cross steel plate joints of the ground-connected wall, characterized in that: include: Failure mode determination module: used to determine the failure mode based on the concrete tensile bearing capacity between the wing plates of the cross steel plate joint and the concrete interaction force between the wing plates of the cross steel plate joint; Bearing capacity calculation module: used to calculate the tensile bearing capacity of the cross steel plate joints of the ground-connected wall based on the failure mode, the normal bond strength between the steel plate and the concrete, the shear resistance of the concrete inside the cross steel plate joint holes, and the tangential bond strength between the steel plate and the concrete.

2. The calculation system for the tensile bearing capacity of the cross steel plate joints of the ground-connected wall according to claim 1, characterized in that: Methods for determining failure modes include: When the tensile bearing capacity of the concrete between the wing plates of the cross steel plate joint is less than or equal to the concrete interaction force between the wing plates of the cross steel plate joint, the failure mode is the first failure mode.

3. The calculation system for the tensile bearing capacity of the cross steel plate joints of the ground-connected wall according to claim 2, characterized in that: When the failure mode is the first failure mode, the calculation method of the tensile bearing capacity of the cross steel plate joint of the ground-connected wall includes: The normal bond strength between the steel plate and concrete is determined based on the normal bond area between the web and concrete and the cross-sectional area of the concrete between the cross steel plate flanges; Determine the shear resistance of the concrete inside the holes of the cross steel plate joint according to the hole area of the flange plate; The tangential bonding force between the steel plate and the concrete is determined based on the tangential bonding area between the steel plate and the concrete; Determine the tensile bearing capacity of the concrete between the steel plates according to the cross-sectional area of the concrete between the cross steel plates; The tensile bearing capacity of the cross steel plate joint of the ground-connected wall is calculated based on the normal bond force between the steel plate and the concrete, the shear force of the concrete inside the holes of the cross steel plate joint, the tangential bond force between the steel plate and the concrete, and the tensile bearing capacity of the concrete between the steel plates.

4. The calculation system for the tensile bearing capacity of the cross steel plate joint of the ground-connected wall according to claim 2 or 3, characterized in that: When the failure mode is the first failure mode, the method for calculating the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall includes: Where, t n is the normal bond strength of the steel plate concrete interface; S n is the normal bonding area between the web and the concrete; S w f is the concrete cross-sectional area between the cross steel plate wings; c ' is the axial compressive strength of cylindrical concrete specimen; S h is the hole area of the wing plate; k e is the influence coefficient of steel plate surface roughness; S t is the tangential bonding area between steel plate and concrete; f t is the axial tensile strength of concrete.

5. The calculation system for the tensile bearing capacity of the cross steel plate joints of the ground-connected wall according to claim 1, characterized in that: Methods for determining failure modes include: When the tensile bearing capacity of the concrete between the wing plates of the cross steel plate joint is greater than the interaction force between the concrete between the wing plates of the cross steel plate joint, the failure mode is the second failure mode.

6. The calculation system for the tensile bearing capacity of the cross steel plate joints of the ground-connected wall according to claim 5, characterized in that: When the failure mode is the second failure mode, the calculation method of the tensile bearing capacity of the cross steel plate joint of the ground-connected wall includes: The normal bond strength between the steel plate and concrete is determined based on the normal bond area between the web and concrete; Determine the shear resistance of the concrete inside the holes of the cross steel plate joint according to the hole area of the flange plate; The tangential bonding force between the steel plate and the concrete is determined based on the tangential bonding area between the steel plate and the concrete; The tensile bearing capacity of the cross steel plate joint of the ground-connected wall is calculated based on the normal bond force between the steel plate and the concrete, the shear resistance of the concrete inside the hole of the cross steel plate joint, and the tangential bond force between the steel plate and the concrete.

7. The calculation system for the tensile bearing capacity of the cross steel plate joints of the ground-connected wall according to claim 5 or 6, characterized in that: When the failure mode is the second failure mode, the calculation method of the tensile bearing capacity Q1 of the cross steel plate joint of the ground-connected wall includes: Where: t n is the normal bond strength of the steel plate concrete interface; S n is the normal bonding area between the web and the concrete; f c ' is the axial compressive strength of cylindrical concrete specimen; S h is the area of the wing hole; k e is the influence coefficient of steel plate surface roughness; S t is the tangential bonding area between steel plate and concrete; f t is the axial tensile strength of concrete.

8. A method for calculating the tensile bearing capacity of the cross steel plate joints of the ground-connected wall based on the system of claim 1, characterized in that: include: The failure mode is determined based on the concrete tensile bearing capacity between the flanges of the cross steel plate joint and the concrete interaction force between the flanges of the cross steel plate joint; The tensile bearing capacity of the cross steel plate joint of the ground-connected wall is calculated based on the failure mode, the normal bond strength between the steel plate and the concrete, the shear resistance of the concrete inside the hole of the cross steel plate joint, and the tangential bond strength between the steel plate and the concrete.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for calculating the tensile bearing capacity of the cross steel plate joints of the ground-connected wall as claimed in claim 8 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method for calculating the tensile bearing capacity of the cross steel plate joints of the ground-connected wall as described in claim 8 are implemented.

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