Method and system for asphalt concrete pavement joint cracking resistance based on net taste technology

Abstract

The present application relates to the field of material science, disclose a kind of asphalt concrete pavement section joint crack resistance method and system based on net taste technology, the method comprises: fitting the pavement section joint model of section joint;Analysis of the damage zone and fracture zone of pavement section joint model, analyze the material stiffness modulus and material relaxation modulus of asphalt concrete;Construction of the viscoelastic damage model of asphalt concrete, calculate the viscoelastic damage coefficient of asphalt concrete, analyze the asphalt viscoelasticity of asphalt concrete;Fitting the crack analysis model of section joint, simulate the pavement damage evolution of section joint;Chemical additives and asphalt concrete are mixed, analyze the viscous effect of geotechnical mixture material;Determine the optimum elastic modulus of geotechnical mixture material, analyze the crack resistance effect of geotechnical mixture material, execute the crack resistance scheme of corresponding section joint of asphalt concrete pavement.The present application can improve the crack resistance effect of asphalt concrete pavement section joint.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of material science, and particularly relates to a segment joint anti-cracking method and system for asphalt concrete pavement based on a net taste technology. BACKGROUND

[0002] The segment joint of asphalt concrete pavement refers to the connecting area between different asphalt concrete pavement blocks. These areas are prone to cracking due to repeated vehicle loads, temperature changes, material shrinkage and other factors. Segment joint anti-cracking can significantly improve the durability of asphalt concrete pavement, reduce early damage caused by cracks, and thus prolong the service life of the pavement.

[0003] At present, the main anti-cracking method for asphalt concrete pavement is crack filling and sealing. Regular crack filling and sealing are performed to prevent water intrusion and crack propagation. This method requires regular maintenance, has high labor costs, and is only a temporary solution, resulting in low efficiency and poor anti-cracking effect of the segment joint of asphalt concrete pavement. SUMMARY

[0004] The present application provides a segment joint anti-cracking method and system for asphalt concrete pavement based on a net taste technology, which mainly aims to improve the anti-cracking effect of the segment joint of asphalt concrete pavement.

[0005] To achieve the above-mentioned purpose, the present application provides a segment joint anti-cracking method for asphalt concrete pavement based on a net taste technology, which comprises:

[0006] Obtaining pavement joint data of the corresponding segment joint of the asphalt concrete pavement, fitting a pavement segment joint model of the segment joint based on the pavement joint data;

[0007] Identifying joint cracks of the pavement segment joint model, determining the crack initiation point coordinates of the joint cracks, analyzing the damage zone and fracture zone of the pavement segment joint model based on the crack initiation point coordinates, analyzing the material stiffness modulus and material relaxation modulus of the corresponding asphalt concrete of the asphalt concrete pavement;

[0008] Based on the damage zone, the fracture zone, the material stiffness modulus and the material relaxation modulus, a viscoelastic damage model of the asphalt concrete is constructed, the viscoelastic damage coefficient of the asphalt concrete is calculated using the viscoelastic damage model, and the asphalt viscoelasticity of the asphalt concrete is analyzed according to the viscoelastic damage coefficient;

[0009] Fitting a crack analysis model of the segment joint, analyzing the crack propagation factor of the segment joint according to the crack analysis model, and simulating the pavement damage evolution of the segment joint using a preset numerical simulation algorithm based on the crack propagation factor.

[0010] According to a preset net taste technology, a chemical additive of the asphalt concrete is obtained, the chemical additive and the asphalt concrete are mixed to obtain a geotechnical mixture material, and a viscosity effect of the geotechnical mixture material is analyzed based on the asphalt viscoelasticity and the pavement damage evolution;

[0011] Based on the viscosity effect, an optimal elastic modulus of the geotechnical mixture material is determined, a crack resistance effect of the geotechnical mixture material is analyzed according to the optimal elastic modulus, and a crack resistance scheme of a corresponding segment joint of the asphalt concrete pavement is executed based on the crack resistance effect.

[0012] Optionally, the fitting of the pavement segment joint model of the segment joint based on the pavement joint data comprises:

[0013] The pavement joint data is preprocessed to obtain preprocessed joint data;

[0014] A model construction purpose of the segment joint is analyzed, and a model framework of the segment joint is determined based on the model construction purpose;

[0015] Joint image data, material data and environment data of the preprocessed joint data are obtained;

[0016] Joint image features of the joint image data are extracted, and a three-dimensional geometric model of the segment joint is constructed according to the joint image features;

[0017] Model material properties of the model framework are defined according to the material data;

[0018] Boundary conditions of the model framework are defined according to the environment data, wherein the boundary conditions comprise: fixed constraint conditions, load action points and temperature change conditions;

[0019] The model material properties and the boundary conditions are mapped into the three-dimensional geometric model to obtain a pavement segment joint model.

[0020] Optionally, the analysis of the damage zone and the fracture zone of the pavement segment joint model based on the crack initiation point coordinates comprises:

[0021] Based on the crack initiation point coordinates, crack propagation data of a joint crack of the pavement segment joint model is analyzed;

[0022] According to the crack propagation data, effective stress of the pavement segment joint model is analyzed;

[0023] Material yield stress, current porosity and porosity range of the pavement segment joint model are determined;

[0024] extracting a porosity lower limit and a porosity upper limit of the porosity range, analyzing a volumetric plastic strain rate of the pavement segment joint model;

[0025] testing a model performance of the initial viscoelastic damage model, and taking the initial viscoelastic damage model as the viscoelastic damage model of the asphalt concrete when the model performance meets a preset model performance standard.

[0026] Optionally, the analyzing the crack propagation factor of the segment joint according to the crack analysis model comprises:

[0027] analyzing a load type and an actual application condition of the segment joint in actual work;

[0028] extracting a crack propagation algorithm of the crack analysis model, and identifying a crack tip of the segment joint;

[0029] calculating a stress intensity coefficient of the crack tip based on the crack propagation algorithm;

[0030] analyzing a stress state of the crack tip according to the stress intensity coefficient, the load type and the actual application condition;

[0031] analyzing the segment joint according to the crack analysis model and the stress state to obtain crack propagation data;

[0032] analyzing the crack propagation factor of the segment joint based on the crack propagation data.

[0033] Optionally, the analyzing the viscous effect of the soil mixture material based on the asphalt viscoelasticity and the pavement damage evolution comprises:

[0034] testing a storage modulus and a loss modulus of the soil mixture material, and calculating a complex shear modulus of the soil mixture material according to the storage modulus and the loss modulus;

[0035] analyzing a mixed viscoelasticity of the soil mixture material according to the complex shear modulus;

[0036] analyzing a viscoelasticity gain coefficient of the soil mixture material according to the asphalt viscoelasticity and the mixed viscoelasticity;

[0037] performing damage evolution simulation on the soil mixture material based on the pavement damage evolution to obtain damage simulation data;

[0038] calculating a mixed damage coefficient of the soil mixture material according to the damage simulation data;

[0039] According to the viscoelastic gain coefficient and the mixed damage coefficient, the viscous effect of the geotechnical mixed material is analyzed.

[0040] Optionally, the optimal elastic modulus of the geotechnical mixed material is determined based on the viscous effect, including:

[0041] The strain data of the geotechnical mixed material is tested, and the elastic modulus of the geotechnical mixed material is calculated according to the strain data;

[0042] The mutual influence relationship between the elastic modulus and the viscous effect is analyzed;

[0043] According to the mutual influence relationship, the elastic modulus and the viscous effect are matched to obtain a plurality of mixed samples;

[0044] The performance of the plurality of mixed samples is detected, and the optimal mixed sample is screened out from the plurality of mixed samples based on the performance of the plurality of mixed samples;

[0045] The optimal elastic modulus of the geotechnical mixed material is determined according to the optimal mixed sample.

[0046] In order to solve the above problems, the present application also provides an asphalt concrete pavement joint anti-cracking system based on net taste technology, the system comprises:

[0047] A segment joint model module is used to obtain pavement joint data of a corresponding segment joint of an asphalt concrete pavement, and based on the pavement joint data, a pavement segment joint model of the segment joint is fitted;

[0048] A modulus parameter calculation module is used to identify a joint crack of the pavement segment joint model, determine a crack initiation point coordinate of the joint crack, analyze a damage zone and a fracture zone of the pavement segment joint model based on the crack initiation point coordinate, and analyze material stiffness modulus and material relaxation modulus of corresponding asphalt concrete of the asphalt concrete pavement;

[0049] An asphalt viscoelasticity analysis module is used to construct a viscoelastic damage model of the asphalt concrete based on the damage zone, the fracture zone, the material stiffness modulus and the material relaxation modulus, calculate a viscoelastic damage coefficient of the asphalt concrete by using the viscoelastic damage model, and analyze asphalt viscoelasticity of the asphalt concrete according to the viscoelastic damage coefficient;

[0050] A pavement damage evolution module is used to fit a crack analysis model of the segment joint, analyze a crack propagation factor of the segment joint according to the crack analysis model, and simulate pavement damage evolution of the segment joint by using a preset numerical simulation algorithm based on the crack propagation factor;

[0051] The adhesiveness analysis module is used to obtain chemical additives for the asphalt concrete according to a preset odor-removing technology, mix the chemical additives with the asphalt concrete to obtain a geotextile, and analyze the adhesiveness of the geotextile based on the viscoelasticity of the asphalt and the evolution of pavement damage.

[0052] The segmental joint crack resistance module is used to determine the optimal elastic modulus of the geotextile based on the adhesive effect, analyze the crack resistance effect of the geotextile based on the optimal elastic modulus, and implement the crack resistance scheme for the corresponding segmental joint of the asphalt concrete pavement based on the crack resistance effect.

[0053] This invention, through fitting a pavement segment joint model based on the pavement joint data, can more meticulously simulate and analyze the initiation, propagation path, and crack network formation of cracks, contributing to an understanding of crack mechanisms and preventative measures. Optionally, by analyzing the material stiffness modulus and relaxation modulus of the asphalt concrete pavement, this invention can analyze the stiffness of the asphalt concrete and the stress relaxation characteristics of the material over time, contributing to an understanding of the pavement's deformation behavior and durability under load. Furthermore, by constructing a viscoelastic damage model of the asphalt concrete based on the damaged area, the fracture area, the material stiffness modulus, and the material relaxation modulus, this invention can more accurately predict changes in the mechanical properties of asphalt concrete under long-term loads, quantify the degree of damage during loading, and thus optimize material proportions and structural design during the design phase, improving performance. This invention improves the durability and reliability of asphalt concrete structures. In this embodiment, by analyzing the crack propagation factor of the segmental joint according to the crack analysis model, the propagation path, speed, and final morphology of cracks under different loads and environmental conditions can be predicted. This optimizes the geometric design, material selection, and construction process of the segmental joint to reduce the probability of crack occurrence or control crack propagation. Furthermore, by using a preset odor-reducing technology, the chemical additives obtained from the asphalt concrete can significantly reduce the pungent odor generated during mixing, construction, and use, while simultaneously enhancing the bond between asphalt and aggregates, improving the overall strength and stability of the asphalt concrete. Finally, by analyzing the crack resistance of the geotextile material based on the optimal elastic modulus, this invention optimizes material design, giving it better crack resistance under external forces, thereby reducing crack generation and propagation. Therefore, this invention can improve the crack resistance of segmental joints in asphalt concrete pavements. Attached Figure Description

[0054] Figure 1 This is a schematic flowchart of a method for crack prevention of asphalt concrete pavement segment joints based on odor-free technology, provided in an embodiment of the present invention.

[0055] Figure 2 Figure 1 shows a functional module diagram of the asphalt concrete pavement segment joint anti-cracking system based on the net taste technology according to an embodiment of the present application.

[0056] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0057] It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0058] An asphalt concrete pavement segment joint anti-cracking method based on net taste technology is provided in the embodiments of the present application. The execution subject of the asphalt concrete pavement segment joint anti-cracking method based on net taste technology includes but is not limited to at least one of electronic devices such as a server, a terminal, etc., which can be configured to execute the method provided in the embodiments of the present application. In other words, the asphalt concrete pavement segment joint anti-cracking method based on net taste technology can be executed by software or hardware installed in a terminal device or a server device, and the software can be a blockchain platform. The server includes but is not limited to a single server, a server cluster, a cloud server, or a cloud server cluster, etc. The server can be a stand-alone server, or a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content distribution networks (CDN), and big data and artificial intelligence platforms, etc. basic cloud computing services.

[0059] Reference Figure 1 Figure 1 shows a flowchart of the asphalt concrete pavement segment joint anti-cracking method based on net taste technology according to an embodiment of the present application. In the embodiment, the asphalt concrete pavement segment joint anti-cracking method based on net taste technology includes:

[0060] S1, obtaining pavement joint data of a corresponding segment joint of an asphalt concrete pavement, and fitting a pavement segment joint model of the segment joint based on the pavement joint data.

[0061] The embodiments of the present application can identify the main factors causing cracks by obtaining the pavement joint data of the corresponding segment joint of the asphalt concrete pavement, which is helpful to select more suitable anti-cracking materials. The pavement joint data refers to various measurement and performance data related to the segment joint of the asphalt concrete pavement.

[0062] The pavement joint data is used to fit a pavement segment joint model of the segment joint, which can simulate and analyze the initiation, propagation path and formation of a crack network in a more detailed manner, and help understand the mechanism and preventive measures of the crack. The pavement segment joint model refers to a model that can simulate and visualize the structure and mechanical behavior of an asphalt concrete pavement segment joint in a three-dimensional space.

[0063] As an embodiment of the present application, fitting the pavement segment joint model of the segment joint based on the pavement joint data comprises:

[0064] The pavement joint data is preprocessed to obtain preprocessed joint data;

[0065] The model construction purpose of the segment joint is analyzed, and a model framework of the segment joint is determined based on the model construction purpose;

[0066] Joint image data, material data and environmental data of the preprocessed joint data are obtained;

[0067] Joint image features of the joint image data are extracted, and a three-dimensional geometric model of the segment joint is constructed according to the joint image features;

[0068] The model material properties of the model framework are defined according to the material data;

[0069] Boundary conditions of the model framework are defined according to the environmental data, wherein the boundary conditions include fixed constraint conditions, load action points and temperature variation conditions;

[0070] The model material properties and the boundary conditions are mapped into the three-dimensional geometric model to obtain a pavement segment joint model.

[0071] The pre-processed joint data refers to data obtained after a series of processing of the road joint data. The model construction purpose refers to specific goals and intentions set when creating the road segment joint model, such as performance evaluation, design optimization, and other purposes. The model framework refers to the basic structure or system adopted when constructing the model, which defines the type, constituent elements, mutual relationship of the model, and how to process data and perform calculations. The joint image data refers to visual information about the road segment joint obtained through image acquisition technology. The material data refers to material property information related to the asphalt concrete road segment joint. The environmental data refers to external condition data that affects the performance of the asphalt concrete road segment joint. The joint image features refer to quantitative or qualitative information extracted from the joint image data to describe and characterize the properties of the road segment joint. The three-dimensional geometric model refers to a mathematical model that accurately represents the shape and size of an object in three-dimensional space. The model material properties refer to characteristic parameters used to describe and define the behavior of materials in the model. The boundary conditions refer to rules and restrictions used to define the interaction of the model system with the external environment. The fixed constraint condition refers to a restriction imposed on a part of the model in numerical simulation or physical modeling to prevent its displacement or movement in a specific direction. The load application point refers to the specific location of load application in structural analysis. The temperature variation condition refers to temperature fluctuations and gradients considered in the road segment joint model.

[0072] Optionally, the joint image features of the joint image data can be extracted by image processing techniques, such as Canny edge detection, morphological operations, etc.

[0073] S2, identify the joint crack of the road segment joint model, determine the crack initiation point coordinates of the joint crack, analyze the damage zone and fracture zone of the road segment joint model based on the crack initiation point coordinates, and analyze the material stiffness modulus and material relaxation modulus of the corresponding asphalt concrete of the asphalt concrete pavement.

[0074] The embodiment of the present application can analyze the material performance of asphalt concrete by identifying the joint crack of the road segment joint model, thereby guiding the selection and application of materials. The joint crack refers to a crack or fracture that occurs at the joint of the asphalt concrete road segment.

[0075] The embodiment of the present application can accurately diagnose the health status of the pavement structure by precisely locating the starting point of the crack by determining the crack initiation point coordinates of the joint crack. The crack initiation point coordinates refer to the specific spatial position point at the starting position of the road segment joint crack.

[0076] Optionally, as an embodiment of the present application, the determination of the crack initiation point coordinates of the joint crack can be determined by computer vision algorithms.

[0077] The embodiment of the present application can analyze the damage degree of the joint area, predict the crack propagation path and speed by analyzing the damage area and the fracture area of the pavement segment joint model based on the crack initiation point coordinates. The damage area refers to various damage information related to the pavement segment joint model. The fracture area refers to information related to the fracture of the pavement segment joint model.

[0078] As an embodiment of the present application, the analysis of the damage area and the fracture area of the pavement segment joint model based on the crack initiation point coordinates comprises:

[0079] Based on the crack initiation point coordinates, the crack propagation data of the joint crack of the pavement segment joint model is analyzed.

[0080] According to the crack propagation data, the effective stress of the pavement segment joint model is analyzed.

[0081] The material yield stress, the current porosity and the porosity range of the pavement segment joint model are determined.

[0082] The lower limit of the porosity and the upper limit of the porosity of the porosity range are extracted, and the volumetric plastic strain rate of the pavement segment joint model is analyzed.

[0083] According to the effective stress, the material yield stress, the current porosity, the lower limit of the porosity, the upper limit of the porosity and the volumetric plastic strain rate, the damage variable of the pavement segment joint model is calculated by using the following formula:

[0084]

[0085] Wherein, S represents the damage variable, Y b represents the effective stress, Y q represents the material yield stress, k represents the current porosity, k min represents the lower limit of the porosity, k max represents the upper limit of the porosity, and β represents the volumetric plastic strain rate.

[0086] According to the damage variable, the damage area and the fracture area of the pavement segment joint model are identified.

[0087] The crack propagation data refers to quantitative information related to the extension and growth of cracks in the pavement segment joint model. The crack propagation data refers to quantitative information related to the extension and growth of cracks in the pavement segment joint model. The effective stress refers to the stress actually bearing external load after considering the influence of internal defects of the material. The material yield stress refers to the critical stress value at which the asphalt concrete begins to deform plastically under external load. The current porosity refers to the percentage of pore volume in total volume of the material in a certain state. The porosity range refers to the possible variation interval of the material porosity under certain conditions. The lower limit of porosity refers to the minimum value of the porosity range. The upper limit of porosity refers to the maximum value of the porosity range. The volumetric plastic strain rate refers to the change amount of volumetric plastic strain per unit time during plastic deformation of the material. The damage variable refers to a dimensionless parameter for quantifying the degree of internal damage of the material or structure.

[0088] Optionally, the determination of the material yield stress, the current porosity and the porosity range of the pavement segment joint model can be determined by multi-scale simulation.

[0089] The embodiment of the present application can analyze the stiffness of the asphalt concrete and the stress relaxation characteristics of the material over time by analyzing the material stiffness modulus and the material relaxation modulus of the corresponding asphalt concrete of the asphalt concrete pavement, which helps to understand the deformation behavior and durability of the pavement under load. The material stiffness modulus refers to the ability of the material to resist deformation when subjected to external force. The material relaxation modulus refers to a quantitative indicator of the phenomenon that the strain gradually increases over time under constant stress.

[0090] As an embodiment of the present application, the analysis of the material stiffness modulus and the material relaxation modulus of the corresponding asphalt concrete of the asphalt concrete pavement comprises:

[0091] The asphalt concrete specimen of the asphalt concrete is constructed, and the support span, specimen height and specimen width of the asphalt concrete specimen are measured.

[0092] The asphalt concrete specimen is subjected to static loading test to obtain static applied load and static displacement.

[0093] According to the support span, the specimen height, the specimen width, the static applied load and the static displacement, the material stiffness modulus of the asphalt concrete specimen is calculated by the following formula:

[0094]

[0095] wherein J represents the material stiffness modulus, H arepresents a static applied load, D represents a support span, w represents a specimen width, g represents a specimen height, p a represents a static displacement;

[0096] performing a dynamic shear rheometer test on the asphalt concrete specimen to obtain a shear stress and a specimen strain;

[0097] calculating a material relaxation modulus of the asphalt concrete specimen according to the shear stress and the specimen strain using the following formula:

[0098]

[0099] wherein C(t) represents a material relaxation modulus at time t, Q(t) represents a shear stress at time t, and B(t) represents a specimen strain at time t.

[0100] wherein the asphalt concrete specimen refers to a standard specimen made according to specific size and shape requirements, used for various performance tests of asphalt concrete materials under laboratory conditions, the support span refers to the distance between two adjacent support points in structural engineering or material testing, the specimen height refers to the size of the asphalt concrete specimen in the vertical direction, the specimen width refers to the size of the asphalt concrete specimen in the horizontal direction, the static applied load refers to the force gradually applied to the specimen at a constant rate or in a non-changing manner, the static displacement refers to the displacement of the structure or material specimen under the action of static load, the shear stress refers to the stress of the force acting on the surface of the object in the direction perpendicular to the acting surface, and the specimen strain refers to the relative change in length or shape of the specimen when subjected to external force, which is a dimensionless quantity for measuring the degree of deformation of the material.

[0101] S3, based on the damage zone, the fracture zone, the material stiffness modulus and the material relaxation modulus, constructing a viscoelastic damage model of the asphalt concrete, calculating a viscoelastic damage coefficient of the asphalt concrete by using the viscoelastic damage model, and analyzing the asphalt viscoelasticity of the asphalt concrete according to the viscoelastic damage coefficient.

[0102] The embodiment of the present application can more accurately predict the mechanical property changes of the asphalt concrete under long-term load action, quantify the damage degree of the asphalt concrete in the loading process, and thus optimize the material ratio and structural design in the design stage, and improve the durability and reliability of the asphalt concrete structure by constructing the viscoelastic damage model of the asphalt concrete based on the damage zone, the fracture zone, the material stiffness modulus and the material relaxation modulus. The viscoelastic damage model refers to a mathematical and physical model for describing and predicting the mechanical behavior of viscoelastic materials such as asphalt concrete when subjected to external load.

[0103] As an embodiment of the present application, the viscoelastic damage model of the asphalt concrete is constructed based on the damage zone, the fracture zone, the material stiffness modulus and the material relaxation modulus, comprising:

[0104] Based on the damage zone and the fracture zone, the material behavior state of the asphalt concrete is analyzed, and a damage evolution equation of the asphalt concrete is defined,

[0105] According to the material behavior state, the model type of the asphalt concrete is determined;

[0106] According to the damage evolution equation and the model type, a model framework of the asphalt concrete is constructed;

[0107] The material stiffness modulus and the material relaxation modulus are mapped into the model framework to obtain an initial viscoelastic damage model, wherein the initial viscoelastic damage model comprises:

[0108]

[0109] wherein γ b (T) represents the stress at time T, S(T) represents the damage variable at time T, J(T) represents the material stiffness modulus at time T, μ(T) represents the strain at time T, and C(θ) represents the material relaxation modulus, represents the strain rate at time T, and dθ represents the integral with respect to time;

[0110] The model performance of the initial viscoelastic damage model is tested, and when the model performance meets the preset model performance standard, the initial viscoelastic damage model is taken as the viscoelastic damage model of the asphalt concrete.

[0111] The material behavior state refers to the comprehensive performance of the internal structure and properties of the asphalt concrete changing with time when subjected to external loads. The damage evolution equation refers to a mathematical expression describing the variation of the damage degree of the material with time or loading history during the loading process. The model type refers to the specific mathematical and physical model form selected when constructing the viscoelastic damage model of the asphalt concrete. The model framework refers to the basic structure and constituent elements used when constructing the viscoelastic damage model of the asphalt concrete. The initial viscoelastic damage model refers to the first basic model established when performing viscoelastic damage analysis on the asphalt concrete material. The model performance refers to the performance and ability of the viscoelastic damage model in simulating and predicting the behavior of the asphalt concrete material. The preset model performance standard refers to a series of criteria preset to measure the model performance according to the expected application target and actual requirements of the model.

[0112] Optionally, the constructing the model framework of the asphalt concrete according to the damage evolution equation and the model type can be constructed by a continuous medium mechanics method.

[0113] The embodiment of the present application can quantitatively analyze the damage degree of the asphalt concrete under the load by calculating the viscoelastic damage coefficient of the asphalt concrete by using the viscoelastic damage model, so as to optimize the formula and construction process of the asphalt concrete to improve the damage resistance of the asphalt concrete.

[0114] As an embodiment of the present application, the calculating the viscoelastic damage coefficient of the asphalt concrete by using the viscoelastic damage model comprises:

[0115] According to the viscoelastic damage model, a model stress-strain curve corresponding to the stress and strain of the viscoelastic damage model is constructed;

[0116] The initial undamaged stress-strain curve of the asphalt concrete is defined, and the current strain and initial elastic modulus of the asphalt concrete are obtained;

[0117] According to the model stress-strain curve, the model stress of the current strain is mapped, and according to the initial undamaged stress-strain curve, the undamaged stress of the current strain is mapped;

[0118] According to the undamaged stress, the model stress and the current strain, the viscoelastic damage coefficient of the asphalt concrete is calculated by using the following formula:

[0119]

[0120] Wherein, α represents the viscoelastic damage coefficient, γ b (τ) represents the model stress of the current strain, M0 represents the initial elastic modulus, μ d represents the current strain, γ init (τ) represents the undamaged stress of the current strain, and dτ represents a small strain increment.

[0121] The model stress-strain curve refers to a curve constructed by a viscoelastic damage model to describe the relationship between stress and strain of asphalt concrete during force application. The initial undamaged stress-strain curve refers to a curve describing the relationship between stress and strain of a material at the initial stage of force application before any damage or destruction occurs. The current strain refers to the total strain experienced by the asphalt concrete material at a specific time or loading stage under certain loading conditions. The initial elastic modulus refers to the ratio of stress and strain at the initial stage of force application, i.e., in the elastic deformation stage (before reaching the yield point or destruction point). The model stress refers to the internal force distribution state of a material or structure calculated or predicted under the action of external force according to a specific theory or assumption. The undamaged stress refers to the stress borne by the material internally without any damage or destruction.

[0122] Optionally, the model stress-strain curve corresponding to the stress and strain of the viscoelastic damage model can be constructed by finite element analysis.

[0123] The asphalt viscoelasticity of the asphalt concrete can be analyzed according to the viscoelastic damage coefficient, which can help optimize the formulation of the asphalt concrete and improve its damage resistance and long-term stability. The asphalt viscoelasticity refers to the mechanical property of asphalt material exhibiting both viscosity and elasticity under the action of external force.

[0124] Optionally, as an embodiment of the present application, the asphalt viscoelasticity of the asphalt concrete can be analyzed by the method of synergistic effect analysis of composite materials.

[0125] S4, fitting a crack analysis model of the segment joint, analyzing a crack propagation factor of the segment joint according to the crack analysis model, and simulating pavement damage evolution of the segment joint based on the crack propagation factor and using a preset numerical simulation algorithm.

[0126] The crack development of the segment joint under different loads and environmental conditions can be predicted by fitting the crack analysis model of the segment joint. The crack analysis model refers to a mathematical and mechanical model for predicting and evaluating the crack behavior of a structure.

[0127] Optionally, as an embodiment of the present application, the crack analysis model of the segment joint can be fitted by data assimilation technology.

[0128] The crack propagation factor of the segment joint is analyzed according to the crack analysis model, so that the expansion path, speed and final form of the crack under different loads and environmental conditions can be predicted, and the geometric design, material selection and construction process of the segment joint are optimized to reduce the probability of crack occurrence or control the expansion of the crack.

[0129] As an embodiment of the present application, the crack propagation factor of the segment joint is analyzed according to the crack analysis model, including:

[0130] The load type and actual application condition of the segment joint in actual work are analyzed;

[0131] The crack propagation algorithm of the crack analysis model is extracted, and the crack tip of the segment joint is identified;

[0132] The stress intensity factor of the crack tip is calculated based on the crack propagation algorithm;

[0133] The stress state of the crack tip is analyzed according to the stress intensity factor, the load type and the actual application condition;

[0134] The segment joint is analyzed according to the crack analysis model and the stress state to obtain crack propagation data;

[0135] The crack propagation factor of the segment joint is analyzed based on the crack propagation data.

[0136] The load type refers to the type of various forces acting on the segment joint, which may come from different sources and action mechanisms. The actual application condition refers to various internal conditions and external actions applied according to the actual situation. The crack propagation algorithm refers to a set of calculation rules and procedures for simulating and predicting the growth of cracks in structures over time or under load. The crack tip refers to the end part of the crack, i.e. the position of the front end of the crack. The stress intensity factor is a dimensionless parameter used to describe the stress state of the crack tip in fracture mechanics. The stress state refers to the stress distribution of each point in the material or structure under external force. The crack propagation data refers to the information about the growth of cracks in materials or structures over time or under load obtained by numerical simulation.

[0137] Optionally, the stress intensity factor of the crack tip can be calculated by the boundary element method based on the crack propagation algorithm.

[0138] Optionally, the crack propagation factor of the segment joint can be obtained by correlation analysis method based on the crack propagation data.

[0139] The embodiment of the present application can predict the expansion path and speed of the segment joint crack under different loads and environmental conditions by simulating the pavement damage evolution of the segment joint by using a preset numerical simulation algorithm based on the crack expansion factor, thereby predicting the development trend of the damage. The preset numerical simulation algorithm refers to a series of calculation methods for simulating and analyzing the mechanical behavior of a structure. The pavement damage evolution refers to a series of processes in which the structural performance and surface condition gradually deteriorate due to various internal and external factors.

[0140] S5, according to the preset odorless technology, the chemical additives of the asphalt concrete are obtained, the chemical additives and the asphalt concrete are mixed to obtain a geotechnical mixed material, and the adhesion effect of the geotechnical mixed material is analyzed based on the asphalt viscoelasticity and the pavement damage evolution.

[0141] The embodiment of the present application can significantly reduce the irritating odor generated during the mixing, construction and use of the asphalt concrete, while enhancing the adhesion between the asphalt and the aggregate, improving the overall strength and stability of the asphalt concrete, by obtaining the chemical additives of the asphalt concrete according to the preset odorless technology. The preset odorless technology refers to a series of technical measures aimed at reducing or eliminating the odor and harmful gases generated during the production, construction and use of building materials such as asphalt concrete. The chemical additives refer to specific chemicals added during the production of asphalt concrete.

[0142] The embodiment of the present application can enhance the adhesion between the asphalt and the aggregate, improve the overall adhesion performance of the mixed material, thereby enhancing the water damage resistance and durability of the pavement, by mixing the chemical additives and the asphalt concrete to obtain a geotechnical mixed material. The geotechnical mixed material refers to a composite material obtained by mixing one or more geotechnical materials with traditional building materials such as asphalt, concrete, etc. according to certain proportions and processes.

[0143] Optionally, as an embodiment of the present application, the mixing of the chemical additives and the asphalt concrete to obtain a geotechnical mixed material can be obtained by intelligent mixing technology.

[0144] The embodiment of the present application can help to enhance the internal adhesion of the asphalt concrete, thereby improving the overall durability of the pavement and reducing early damage caused by poor adhesion, by analyzing the adhesion effect of the geotechnical mixed material based on the asphalt viscoelasticity and the pavement damage evolution. The adhesion effect refers to the adhesion ability of the asphalt concrete mixture under physical and chemical action.

[0145] As an embodiment of the present application, the analysis of the viscous and cohesive effect of the geotechnical mixture based on the asphalt viscoelasticity and the pavement damage evolution comprises:

[0146] The storage modulus and the loss modulus of the geotechnical mixture are tested, and the complex shear modulus of the geotechnical mixture is calculated according to the storage modulus and the loss modulus.

[0147] The mixed viscoelasticity of the geotechnical mixture is analyzed according to the complex shear modulus.

[0148] The viscoelasticity gain coefficient of the geotechnical mixture is analyzed according to the asphalt viscoelasticity and the mixed viscoelasticity.

[0149] The damage simulation data of the geotechnical mixture is obtained by simulating the damage evolution of the geotechnical mixture based on the pavement damage evolution.

[0150] The mixed damage coefficient of the geotechnical mixture is calculated according to the damage simulation data.

[0151] The viscous and cohesive effect of the geotechnical mixture is analyzed according to the viscoelasticity gain coefficient and the mixed damage coefficient.

[0152] The storage modulus refers to a measure of the energy storage capability of a material when subjected to periodic stress or strain. The loss modulus refers to a measure of the ability of a material to lose energy in the form of heat when subjected to periodic stress or strain. The complex shear modulus refers to a complex parameter that describes the viscoelastic behavior of a material under dynamic or alternating stress. The mixed viscoelasticity refers to the characteristics of a material that exhibit both viscosity and elasticity. The viscoelasticity gain coefficient refers to a parameter used to describe the change in the viscoelastic characteristics of a material. The damage simulation data refers to a series of data used to describe the internal structural damage evolution of a material under external load. The mixed damage coefficient refers to a parameter used to quantify the degree of damage of a material under complex stress or complex loading conditions.

[0153] Optionally, the testing of the storage modulus and the loss modulus of the geotechnical mixture can be measured by dynamic shear test.

[0154] Optionally, the calculation of the mixed damage coefficient of the geotechnical mixture according to the damage simulation data can be calculated by finite element analysis method.

[0155] S6, based on the viscous and cohesive effect, determine the optimal elastic modulus of the geotechnical mixture, analyze the anti-cracking effect of the geotechnical mixture according to the optimal elastic modulus, and execute the anti-cracking scheme of the corresponding segment joint of the asphalt concrete pavement based on the anti-cracking effect.

[0156] The embodiment of the present application can ensure the stability of the material under long-term load, reduce deformation and fatigue damage, and prolong the service life of the road by determining the optimal elastic modulus of the geotechnical mixture based on the cohesive effect.

[0157] As an embodiment of the present application, the determination of the optimal elastic modulus of the geotechnical mixture based on the cohesive effect comprises:

[0158] Testing the strain data of the geotechnical mixture, and calculating the elastic modulus of the geotechnical mixture according to the strain data;

[0159] Analyzing the mutual influence relationship between the elastic modulus and the cohesive effect;

[0160] According to the mutual influence relationship, the elastic modulus and the cohesive effect are matched to obtain a plurality of mixed samples;

[0161] Detecting the multi-sample performance of the plurality of mixed samples, and screening the optimal mixed sample from the plurality of mixed samples based on the multi-sample performance;

[0162] According to the optimal mixed sample, the optimal elastic modulus of the geotechnical mixture is determined.

[0163] The strain data refers to the ratio of deformation to original size of the material when subjected to external force in material mechanics testing. The elastic modulus refers to the ratio of stress to strain within the elastic deformation range when the material is subjected to external force. The mutual influence relationship refers to the interaction and dependence relationship between different factors, variables or components. The plurality of mixed samples refers to a series of different geotechnical mixture samples prepared by changing the proportion of ingredients, material types or other variables. The multi-sample performance refers to the results obtained by a series of tests on the plurality of mixed samples. The optimal mixed sample refers to the sample that shows the best performance through performance testing and evaluation among a series of mixed samples.

[0164] Optionally, the testing of the strain data of the geotechnical mixture can be obtained by triaxial shear test.

[0165] The embodiment of the present application can optimize the design of the material by analyzing the crack resistance effect of the geotechnical mixture according to the optimal elastic modulus, so that the material has better crack resistance when subjected to external force, thereby reducing the generation and development of cracks. The crack resistance effect refers to the ability of the geotechnical mixture to resist cracks when subjected to external load, temperature change, humidity change or other environmental factors.

[0166] Optionally, as one embodiment of the present application, the analysis of the anti-cracking effect of the soil mixture material according to the optimal elastic modulus can be analyzed by an environmental simulation laboratory.

[0167] The anti-cracking scheme of the asphalt concrete pavement corresponding segment joint is executed based on the anti-cracking effect, so that the cracks at the segment joint can be reduced by an effective anti-cracking scheme, and the integrity and continuity of the pavement structure are improved.

[0168] The pavement segment joint model of the segment joint is fitted based on the pavement joint data, so that the initiation, propagation path and formation of the crack network can be simulated and analyzed in more detail, which helps to understand the mechanism and preventive measures of the crack; optionally, the material stiffness modulus and material relaxation modulus of the asphalt concrete corresponding to the asphalt concrete pavement can be analyzed, so that the stiffness of the asphalt concrete and the stress relaxation characteristics of the material changing over time can be analyzed, which helps to understand the deformation behavior and durability of the pavement under load; the viscoelastic damage model of the asphalt concrete is constructed based on the damage zone, the fracture zone, the material stiffness modulus and the material relaxation modulus, so that the mechanical property change of the asphalt concrete under long-term load can be more accurately predicted, and the damage degree of the asphalt concrete in the loading process can be quantified, thereby optimizing the material proportioning and structure design in the design stage, and improving the durability and reliability of the asphalt concrete structure; the crack propagation factor of the segment joint is analyzed according to the crack analysis model, so that the propagation path, speed and final form of the crack under different loads and environmental conditions can be predicted, thereby optimizing the geometric design, material selection and construction process of the segment joint to reduce the probability of crack occurrence or control the propagation of the crack; the chemical additives of the asphalt concrete are obtained according to the preset odorless technology, so that the irritating odor generated in the mixing, construction and use process of the asphalt concrete can be significantly reduced, and the bonding force between the asphalt and the aggregate is enhanced, the overall strength and stability of the asphalt concrete are improved, and finally, the anti-cracking effect of the material is analyzed according to the optimal elastic modulus, so that the design of the material can be optimized to have better anti-cracking performance when subjected to external force, thereby reducing the generation and development of cracks. Therefore, the anti-cracking effect of the asphalt concrete pavement segment joint can be improved.

[0169] As Figure 2 shown, it is a functional module diagram of the asphalt concrete pavement segment joint anti-cracking system based on the odorless technology provided by one embodiment of the present application.

[0170] The asphalt concrete pavement segment joint anti-cracking system 200 based on the net taste technology can be installed in an electronic device. According to the functions implemented, the asphalt concrete pavement segment joint anti-cracking system 200 based on the net taste technology can include a segment joint model module 201, a modulus parameter calculation module 202, an asphalt viscoelasticity analysis module 203, a pavement damage evolution module 204, a viscosity effect analysis module 205, and a segment joint anti-cracking module 206. The modules of the present application can also be referred to as units, which refer to a series of computer program segments that can be executed by an electronic device processor and can complete a fixed function, which are stored in the memory of the electronic device.

[0171] In the present embodiment, the functions of each module / unit are as follows:

[0172] The segment joint model module 201 is configured to obtain pavement joint data of a corresponding segment joint of an asphalt concrete pavement, and fit a pavement segment joint model of the segment joint based on the pavement joint data.

[0173] The modulus parameter calculation module 202 is configured to identify a joint crack of the pavement segment joint model, determine a crack initiation point coordinate of the joint crack, analyze a damage zone and a fracture zone of the pavement segment joint model based on the crack initiation point coordinate, and analyze material stiffness modulus and material relaxation modulus of corresponding asphalt concrete of the asphalt concrete pavement.

[0174] The asphalt viscoelasticity analysis module 203 is configured to construct a viscoelastic damage model of the asphalt concrete based on the damage zone, the fracture zone, the material stiffness modulus, and the material relaxation modulus, calculate a viscoelastic damage coefficient of the asphalt concrete using the viscoelastic damage model, and analyze asphalt viscoelasticity of the asphalt concrete according to the viscoelastic damage coefficient.

[0175] The pavement damage evolution module 204 is configured to fit a crack analysis model of the segment joint, analyze a crack propagation factor of the segment joint according to the crack analysis model, and simulate pavement damage evolution of the segment joint using a preset numerical simulation algorithm based on the crack propagation factor.

[0176] The viscosity effect analysis module 205 is configured to obtain a chemical additive of the asphalt concrete according to a preset net taste technology, mix the chemical additive and the asphalt concrete to obtain a geotechnical mixture material, and analyze viscosity effect of the geotechnical mixture material based on the asphalt viscoelasticity and the pavement damage evolution.

[0177] The segment joint anti-cracking module 206 is configured to determine an optimal elastic modulus of the geotechnical mixture based on the adhesion effect, analyze an anti-cracking effect of the geotechnical mixture according to the optimal elastic modulus, and execute an anti-cracking scheme of the corresponding segment joint of the asphalt concrete pavement based on the anti-cracking effect.

[0178] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A method of crack resistance in asphalt concrete pavement joint sections based on the net taste technology, characterized by, The method comprises: acquiring pavement joint data of a corresponding segment joint of an asphalt concrete pavement, fitting a pavement segment joint model of the segment joint based on the pavement joint data; identifying a joint crack of the pavement segment joint model, determining a crack initiation point coordinate of the joint crack, analyzing a damage zone and a fracture zone of the pavement segment joint model based on the crack initiation point coordinate, analyzing material stiffness modulus and material relaxation modulus of corresponding asphalt concrete of the asphalt concrete pavement; based on the damage zone, the fracture zone, the material stiffness modulus and the material relaxation modulus, constructing a viscoelastic damage model of the asphalt concrete, calculating a viscoelastic damage coefficient of the asphalt concrete by using the viscoelastic damage model, and analyzing asphalt viscoelasticity of the asphalt concrete according to the viscoelastic damage coefficient; fitting a crack analysis model of the segment joint, analyzing a crack propagation factor of the segment joint according to the crack analysis model, and simulating pavement damage evolution of the segment joint by using a preset numerical simulation algorithm based on the crack propagation factor; acquiring a chemical additive of the asphalt concrete according to a preset odorless technology, mixing the chemical additive and the asphalt concrete to obtain a geotechnical mixture material, and analyzing a cohesive effect of the geotechnical mixture material based on the asphalt viscoelasticity and the pavement damage evolution; based on the cohesive effect, determining an optimal elastic modulus of the geotechnical mixture material, analyzing a crack resistance effect of the geotechnical mixture material according to the optimal elastic modulus, and executing a crack resistance scheme of the corresponding segment joint of the asphalt concrete pavement based on the crack resistance effect.

2. The net taste technology based asphalt concrete pavement joint crack resistance method according to claim 1, characterized in that, The method comprises: preprocessing the pavement joint data to obtain pretreated joint data; analyzing a model construction purpose of the segment joint, determining a model framework of the segment joint based on the model construction purpose; acquiring joint image data, material data and environmental data of the pretreated joint data.

3. The net taste technology based asphalt concrete pavement joint crack resistance method according to claim 2, characterized in that, extracting joint image features of the joint image data, and constructing a three-dimensional geometric model of the segment joint according to the joint image features; defining model material properties of the model framework according to the material data; defining boundary conditions of the model framework according to the environmental data, wherein the boundary conditions include fixed constraint conditions, load action points and temperature change conditions; mapping the model material properties and the boundary conditions to the three-dimensional geometric model to obtain a pavement segment joint model.

4. The net taste technology based asphalt concrete pavement joint crack resistance method as claimed in claim 1, wherein, The method comprises: analyzing crack propagation data of a corresponding joint crack of the pavement segment joint model based on the crack initiation point coordinate; analyzing effective stress of the pavement segment joint model according to the crack propagation data; determining material yield stress, current porosity and porosity range of the pavement segment joint model.

5. The net taste technology based asphalt concrete pavement joint crack resistance method as claimed in claim 4, wherein, extracting a lower limit of porosity and an upper limit of porosity of the porosity range, and analyzing volumetric plastic strain rate of the pavement segment joint model; calculating a damage variable of the pavement segment joint model according to the effective stress, the material yield stress, the current porosity, the porosity lower limit, the porosity upper limit, and a volumetric plastic strain rate; identifying a damage zone and a fracture zone of the pavement segment joint model according to the damage variable.

6. The net taste technology based asphalt concrete pavement joint crack resistance method as claimed in claim 1, wherein, The analysis of the material stiffness modulus and the material relaxation modulus of the asphalt concrete corresponding to the asphalt concrete pavement comprises: constructing an asphalt concrete specimen of the asphalt concrete, and measuring a support span, a specimen height, and a specimen width of the asphalt concrete specimen; performing a static loading test on the asphalt concrete specimen to obtain a static applied load and a static displacement; calculating the material stiffness modulus of the asphalt concrete specimen according to the support span, the specimen height, the specimen width, the static applied load, and the static displacement.

7. The net taste technology based asphalt concrete pavement joint crack resistance method as claimed in claim 6, wherein, performing a dynamic shear rheometer test on the asphalt concrete specimen to obtain a shear stress and a specimen strain; calculating the material relaxation modulus of the asphalt concrete specimen according to the shear stress and the specimen strain.

8. The net taste technology based asphalt concrete pavement joint crack resistance method as claimed in claim 1, wherein, The construction of the viscoelastic damage model of the asphalt concrete based on the damage zone, the fracture zone, the material stiffness modulus, and the material relaxation modulus comprises: analyzing a material behavior state of the asphalt concrete based on the damage zone and the fracture zone, and defining a damage evolution equation of the asphalt concrete; determining a model type of the asphalt concrete according to the material behavior state.

9. The net taste technology based asphalt concrete pavement joint crack resistance method as claimed in claim 8, wherein, constructing a model framework of the asphalt concrete according to the damage evolution equation and the model type; mapping the material stiffness modulus and the material relaxation modulus into the model framework to obtain an initial viscoelastic damage model; testing a model performance of the initial viscoelastic damage model, and taking the initial viscoelastic damage model as the viscoelastic damage model of the asphalt concrete when the model performance meets a preset model performance standard.

10. A crack resistance system for asphalt concrete pavement joints based on the net taste technology, characterized in that, The system for performing the asphalt concrete pavement segment joint anti-cracking method based on the net taste technology comprises: a segment joint model module configured to acquire pavement joint data of a segment joint corresponding to an asphalt concrete pavement, and fit a pavement segment joint model of the segment joint based on the pavement joint data; a modulus parameter calculation module configured to identify a joint crack of the pavement segment joint model, determine coordinates of a crack initiation point of the joint crack, analyze a damage zone and a fracture zone of the pavement segment joint model based on the coordinates of the crack initiation point, and analyze a material stiffness modulus and a material relaxation modulus of asphalt concrete corresponding to the asphalt concrete pavement; an asphalt viscoelasticity analysis module configured to construct a viscoelastic damage model of the asphalt concrete based on the damage zone, the fracture zone, the material stiffness modulus, and the material relaxation modulus, calculate a viscoelastic damage coefficient of the asphalt concrete by using the viscoelastic damage model, and analyze asphalt viscoelasticity of the asphalt concrete according to the viscoelastic damage coefficient. The pavement damage evolution module is configured to fit a crack analysis model of the segment joint, analyze a crack propagation factor of the segment joint according to the crack analysis model, and simulate pavement damage evolution of the segment joint based on the crack propagation factor by using a preset numerical simulation algorithm. The tackiness effect analysis module is configured to obtain a chemical additive of the asphalt concrete according to a preset odorless technology, mix the chemical additive and the asphalt concrete to obtain a geotechnical mixture material, and analyze a tackiness effect of the geotechnical mixture material based on the asphalt viscoelasticity and the pavement damage evolution. The segment joint crack resistance module is configured to determine an optimal elastic modulus of the geotechnical mixture material based on the tackiness effect, analyze a crack resistance effect of the geotechnical mixture material according to the optimal elastic modulus, and execute a crack resistance scheme of the corresponding segment joint of the asphalt concrete pavement based on the crack resistance effect.

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