Method and system for assessing the resistance and resilience of a breakwater and revetment structure under wave action

Abstract

The present application provides a kind of wave action under breakwater and revetment structure's impact toughness evaluation method and system, comprising: the hydrological data of the area where breakwater and revetment structure are integrated, obtain representative wave hydrological characteristic value;Collect the design site information of the breakwater and revetment structure to be evaluated, determine the dominant failure mode and corresponding engineering demand parameter, and give the engineering demand parameter value under specific wave according to formula, numerical or physical model;The engineering demand parameter value is compared with vulnerability curve, and the damage grade of the breakwater to be evaluated and its probability distribution are obtained;According to the three performance indicators of casualty rate, economic loss rate and repair efficiency, the loss caused by different damage levels is evaluated, and the resilience evaluation index is calculated based on the decision proportion, and the resilience evaluation result is formed.It is logical, scientific and reasonable, and has strong operability, and the performance indicators considered are highly feasible, and has practical application value.

Description

Technical Field

[0001] This invention relates to the field of building evaluation technology, specifically to a method and system for assessing the erosion toughness of breakwaters and revetment structures under wave action. Background Technology

[0002] Since the 20th century, humanity has become increasingly aware of the importance of marine resources. As a major maritime nation with over 18,000 kilometers of coastline, my country has invested significant human and financial resources in developing its marine resources. Simultaneously, various hydraulic structures, such as breakwaters and revetments, have flourished, playing a vital role in protecting the coastline from erosion by wind, waves, and currents, creating sheltered and stable waterways, and ensuring the safety of people and property. These structures provide a powerful guarantee for the further development of coastal resources.

[0003] However, global warming is causing sea level rise due to ocean expansion and glacial melting. The probability of extreme weather events is soaring, and breakwaters and revetments are constantly threatened by wave hazards. With the emergence of the concept of "building resilient cities," the disaster prevention and mitigation capabilities of infrastructure are playing an increasingly important role in regional security. In an increasingly complex and volatile hydrological environment, breakwaters and revetments, as lifeline projects in the field of hydraulic engineering, urgently need a comprehensive erosion resilience assessment method to ensure the safety of regional infrastructure, residents' lives, and property, thereby providing a reference for further improving the wave hazard resistance capabilities of hydraulic structures, primarily breakwaters and revetments.

[0004] Traditional breakwater and revetment structure design and evaluation methods only focus on the strength of the structure itself, without considering the disaster adaptability of the breakwater and revetment structure under wave action, as well as the difficulty of post-disaster repair. They cannot meet the requirements of "building resilient cities" and are difficult to apply directly. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a method and system for evaluating the erosion toughness of breakwaters and revetment structures under wave action.

[0006] According to one aspect of the present invention, a method for evaluating the erosion toughness of breakwaters and revetment structures under wave action is provided, comprising:

[0007] By integrating hydrological data of the area where the breakwater and revetment structures are located, representative wave hydrological characteristic values ​​can be obtained.

[0008] Collect site information on the design of the breakwater and revetment structures to be evaluated, determine the dominant failure modes and corresponding engineering requirements parameters, and provide engineering requirements parameter values ​​under specific waves based on formulas, numerical values ​​or physical models.

[0009] By comparing the engineering requirement parameter values ​​with the vulnerability curve, the damage level and probability distribution of the dike to be evaluated are obtained.

[0010] Based on three performance indicators—casualty rate, economic loss rate, and repair efficiency—the losses caused by different damage levels are assessed, and resilience assessment indicators are calculated based on decision-making ratios to form resilience assessment results.

[0011] Preferably, the hydrological data includes parameters such as water level, wave height, period, wavelength, and flow velocity;

[0012] The representative wave hydrological characteristic value refers to the hydrological parameter under a certain disaster frequency, wherein the disaster frequency usually refers to wave disasters that occur once every 50 years, once every 100 years, or once every 1000 years.

[0013] The site information includes: geometric dimensions, building materials, geotechnical investigation information, and embankment type;

[0014] The geometric dimensions refer to parameters that describe the spatial properties of the breakwater and revetment structures.

[0015] The building materials include material types and material parameters;

[0016] The geotechnical investigation information includes parameters that affect the performance of breakwaters and revetment structures;

[0017] The types of dikes are classified by structural form into sloping and vertical types, and by construction materials into riprap dikes, caisson dikes, and concrete block dikes.

[0018] Preferably, the dominant failure mode refers to the failure mode that has the greatest impact on the overall performance of the dike. It is obtained by combining the basic failure mode with the dike type and can be adjusted based on regional historical data and expert opinions.

[0019] The basic failure modes include wave failure, slip failure, rock instability, and foundation scour.

[0020] The instability of the riprap is the recommended dominant failure mode for the riprap embankment and the concrete block embankment.

[0021] The slippage failure is the recommended dominant failure mode of the caisson breakwater;

[0022] When the foundation softness is below a set threshold, the foundation scour is the recommended dominant failure mode for vertical embankments.

[0023] When the frequency of regional storm surge disasters exceeds the set threshold, the recommended dominant failure mode for vertical breakwaters and sloping breakwaters is the overtopping failure.

[0024] The engineering requirement parameters refer to the parameters characterizing the performance of the levee required for levee resilience evaluation, and correspond to the dominant failure mode of the levee.

[0025] The engineering requirements parameters corresponding to the basic failure modes of wave overrun failure, slippage failure, rock instability and foundation scour are wave overrun, slippage, rock erosion index and scour rate, respectively.

[0026] The wave overpass volume refers to the average unit width flow rate of waves over the top of the dike along the length of the dike, and is represented by the parameter Q.

[0027] The slippage refers to the horizontal displacement of the dike along its width under the action of waves, and is represented by the parameter S.

[0028] The rock erosion index is calculated by the following formula:

[0029]

[0030] In the formula, E r The erosion index is denoted by A, where A is the cross-sectional erosion area, and D is the erosion area of ​​the rock. n50 The nominal diameter of the stone block;

[0031] The scouring rate is calculated by the following formula:

[0032] D = Z mf / B

[0033] In the formula, D is the scouring rate, and Z is the scouring rate. mf B represents the maximum scour depth, and B represents the width of the embankment.

[0034] Preferably, the vulnerability curve is a vulnerability curve corresponding to the suggested basic failure mode of the dike, which represents the probability of the dike reaching or exceeding a given damage state.

[0035] Based on the threshold parameters of engineering requirements, the damage level is divided into three levels. Assuming that the vulnerability curve follows a log-normal distribution, the median and log standard deviation corresponding to different basic failure modes and damage levels are obtained.

[0036] Preferably, the step of comparing the engineering requirement parameter values ​​with the fragility curve to obtain the damage level and probability distribution of the dike to be evaluated includes:

[0037] The probability of a certain damage level is calculated by taking the difference in the exceedance probabilities of two lines as the value of the probability of a certain damage level, using the following formula:

[0038] P(DM i ) = P i -P i+1

[0039] In the formula, P(DM) i Let P be the probability that the damage level of the dike is level i. iIt is the exceedance probability read on the i-th fragility curve, P i+1 It is the exceedance probability read on the i+1 level vulnerability curve.

[0040] Preferably, the casualty rate, economic loss rate, and repair efficiency exhibit a probability distribution with respect to damage level, market conditions, dike type, and dike scale.

[0041] Preferably, the losses caused by different damage levels are assessed based on three performance indicators: casualty rate, economic loss rate, and repair efficiency. Based on the decision ratio, a resilience assessment index is calculated to form a resilience assessment result.

[0042] include:

[0043] The evaluation is based on three performance indicators: casualty rate, economic loss rate, and repair efficiency, using the following formula:

[0044]

[0045]

[0046]

[0047] In the formula, C, E, and R represent the performance evaluation results in terms of casualty rate, economic loss rate, and repair efficiency, respectively. i e i r i The casualty rate, economic loss rate, and repair efficiency are corresponding to different damage levels i.

[0048] The impact of decision-making ratios on resilience assessment indicators is expressed by the following formula:

[0049] RA = f E E+f R R

[0050] In the formula, RA is the toughness assessment index, and f E f R These are the decision ratios for economic loss rate and repair efficiency, respectively, and there is an f relationship between the parameters. E +f R =1;

[0051] Based on the casualty rate assessment result C and the toughness assessment index RA, the toughness level of the breakwater and revetment structure under wave action is evaluated. The larger the value of RA, the worse the toughness level of the breakwater to be evaluated.

[0052] According to a second aspect of the present invention, a system for evaluating the erosion toughness of breakwaters and revetment structures under wave action is provided, comprising:

[0053] The hydrology module integrates hydrological data of the area where the breakwater and revetment structures are located, and obtains representative wave hydrological characteristic values.

[0054] The engineering requirements module collects design site information for the breakwater and revetment structures to be evaluated, determines the dominant failure modes and corresponding engineering requirements parameters, and provides engineering requirements parameter values ​​under specific waves based on formulas, numerical values ​​or physical models.

[0055] Probability module: Compares the engineering requirement parameter values ​​with the vulnerability curve to obtain the damage level and probability distribution of the dike to be evaluated;

[0056] Assessment Results Module: Based on three performance indicators—casualty rate, economic loss rate, and repair efficiency—the module assesses the losses caused by different damage levels, calculates resilience assessment indicators based on decision-making ratios, and generates resilience assessment results.

[0057] According to a third aspect of the present invention, a terminal is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, can be used to perform any of the methods described herein, or to run the system described herein.

[0058] According to a fourth aspect of the invention, a computer-readable storage medium has a computer program stored thereon, which, when executed by a processor, can be used to perform any of the methods described herein, or to run the system described herein.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The method and system for assessing the erosion toughness of breakwaters and revetment structures under wave action, as described in this invention, are based on three performance indicators: casualty rate, economic loss rate, and repair efficiency. First, wave action is quantified using hydrological characteristic values. Then, the impact of wave action on the breakwater and revetment structures is characterized using engineering requirement parameters based on formulas, numerical values, or physical models. Next, the probability distribution of different damage levels under the dominant failure mode of the breakwater is obtained by combining vulnerability curves. Finally, considering different decision ratios of performance indicators, the toughness assessment results of the breakwater and revetment structures are obtained. This method is logically rigorous, scientifically sound, highly operable, and incorporates highly feasible performance indicators, making it valuable for practical application. Attached Figure Description

[0061] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0062] Figure 1 This is a flowchart illustrating the method for evaluating the erosion toughness of breakwaters and revetment structures under wave action in one embodiment of the present invention.

[0063] Figure 2 This is a schematic cross-sectional view of the breakwater and revetment structure in a specific embodiment;

[0064] Figure 3 The vulnerability curves corresponding to the suggested basic failure modes in the specific embodiments include, specifically, the wave overload vulnerability curve, the slippage vulnerability curve, the rock erosion index vulnerability curve, and the scour rate vulnerability curve.

[0065] Figure 4 The performance index distribution curves in the specific embodiments include, specifically, the casualty rate distribution curve, the economic loss rate distribution curve, and the repair efficiency distribution curve. Detailed Implementation

[0066] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0067] See Figure 1 This invention provides an embodiment of a method for evaluating the erosion toughness of breakwaters and revetment structures under wave action, the method comprising the following steps:

[0068] Step 1: Integrate hydrological data of the area where the breakwater and revetment structures are located to obtain representative wave hydrological characteristic values;

[0069] Step 2: Collect design site information for the breakwater and revetment structures to be evaluated, determine the dominant failure mode and corresponding engineering requirement parameters, and provide engineering requirement parameter values ​​under specific waves based on formulas, numerical values ​​or physical models.

[0070] Step 3: Compare the engineering requirement parameter values ​​with the vulnerability curve to obtain the damage level and probability distribution of the levee to be evaluated;

[0071] Step four: Based on three performance indicators—casualty rate, economic loss rate, and repair efficiency—the losses caused by different damage levels are assessed, and resilience assessment indicators are calculated based on the decision-making ratio to form resilience assessment results.

[0072] In a preferred embodiment of the present invention, step one involves integrating hydrological data of the area where the breakwater and revetment structures are located to obtain representative wave hydrological characteristic values; specifically, this includes:

[0073] S11, Collect regional hydrological data for the breakwater and revetment structures to be evaluated.

[0074] Regional hydrological data, including but not limited to water level, wave height, period, wavelength, and flow velocity.

[0075] S12, select characteristic values ​​of wave hydrological parameters based on the frequency of disasters of interest.

[0076] The frequency of disasters usually refers to wave disasters that occur once every 50 years, once every 100 years, or once every 1000 years, and can be selected according to relevant design specifications.

[0077] In a preferred embodiment of the present invention, step two involves collecting design site information of the breakwater and revetment structure to be evaluated, determining the dominant failure mode and corresponding engineering requirement parameters, and providing engineering requirement parameter values ​​under specific wave conditions based on formulas, numerical values, or physical models. Specifically, this includes:

[0078] S21, Collect site information for the design of the breakwater and revetment structures to be evaluated.

[0079] Site information refers to information such as the site's geometric dimensions, building materials, geotechnical investigation information, and embankment type.

[0080] Among them, geometric dimensions refer to all parameters that can describe the spatial properties of breakwater and revetment structures, including but not limited to breakwater length, breakwater width, breakwater height, subgrade height, subgrade width, breast wall height, breast wall width, kick-off width, and kick-off height.

[0081] Building materials include material type and specific material parameters. Plain concrete material parameters should include standard value of compressive strength, elastic modulus, Poisson's ratio, density, etc. Reinforced concrete material parameters should include, in addition to the above parameters, steel bar yield strength, steel bar tensile strength, elongation, nominal weight, etc. Stone material parameters include stone bar diameter, stone bar density, uniformity, permeability coefficient, etc. Parameters for other unlisted material types can be collected according to engineering experience and actual conditions.

[0082] Geotechnical investigation information should include all parameters that affect the performance of breakwaters and revetment structures, including but not limited to soil interface friction coefficient, soil weight, foundation slope, soil mechanical parameters (internal friction angle, cohesion, etc.), soil permeability coefficient, and soil relative density.

[0083] S22, determine the dominant failure mode and corresponding engineering requirement parameters.

[0084] The basic failure modes of breakwaters should be summarized based on extensive data collection and mechanism research. Preferably, the basic failure modes proposed in this invention include wave overtopping failure, slippage failure, boulder instability, and foundation scour. This recommendation does not represent a complete summary of all failure modes of breakwaters and revetment structures and should be supplemented as appropriate based on the breakwater failure history of the region.

[0085] The dominant failure mode of a dike refers to the failure mode that has the greatest impact on the overall performance of the dike. It should generally be determined by considering the dike type, regional historical data, and expert opinions. This invention provides suggested dominant failure modes for different dike types. These include: riprap instability as the suggested dominant failure mode for riprap dikes and concrete block dikes; slippage failure as the suggested dominant failure mode for caisson dikes; foundation scouring as the suggested dominant failure mode for vertical dikes when the foundation is relatively weak; and high frequency of storm surge disasters and overtopping failure as the suggested dominant failure mode for vertical dikes and sloping dikes. Optionally, the dominant failure mode should be adjusted according to the actual breakwater and revetment structure.

[0086] Engineering requirement parameters refer to the parameters characterizing the performance of the levee required for levee toughness evaluation. They generally correspond to the dominant failure mode of the levee. The engineering requirement parameters that correspond to the basic failure mode proposed in this invention are wave overtopping, slippage, rock erosion index, and scour rate, which can be adjusted according to actual engineering experience.

[0087] The above-mentioned wave overtopping refers to the average unit width flow rate of waves over the top of the dike along the length of the dike, denoted by the parameter Q.

[0088] The aforementioned slippage refers to the horizontal displacement of the dike along its width under the action of waves, and is represented by the parameter S.

[0089] The above-mentioned erosion index of boulders is calculated by the following formula:

[0090]

[0091] In the formula, E r The erosion index is denoted by A, where A is the cross-sectional erosion area, and D is the erosion area of ​​the rock. n50 The nominal diameter of the stone block.

[0092] The above-mentioned scouring rate is calculated by the following formula:

[0093] D = Z mf / B

[0094] In the formula, D is the scouring rate, and Z is the scouring rate. mf B represents the maximum scour depth, and B represents the width of the embankment.

[0095] S23 provides engineering requirement parameter values ​​for specific waves based on formulas, numerical values, or physical models.

[0096] Engineering requirement parameter values ​​are obtained through formulas, numerical values, or physical models. The above calculation formulas should be based on industry standards or theoretical research, the above numerical models should be fully verified, and the above physical models should be measured multiple times and averaged.

[0097] The interaction between breakwaters, revetments, and waves involves complex mechanisms, diverse failure modes, and significant challenges in assessment. Step two of this invention provides suggested basic failure modes for breakwaters, corresponding to different breakwater types, and then outlines the engineering requirements parameters for each failure mode. This step innovatively offers a specific workflow for analyzing breakwater responses under wave action, possessing practical engineering application value for quantifying the interaction between waves and breakwaters / revetments to evaluate specific breakwaters.

[0098] In a preferred embodiment of the present invention, step three involves comparing the engineering requirement parameter values ​​with the vulnerability curve to obtain the damage level and probability distribution of the levee to be evaluated. Specifically, this includes:

[0099] S31 compares the engineering requirement parameter values ​​with the fragility curve.

[0100] The vulnerability curve represents the probability that a levee will reach or exceed a given damage state. This invention classifies damage levels into three levels based on engineering requirement parameter thresholds. Assuming the vulnerability curve follows a log-normal distribution, the median and log-standard deviation for different basic failure modes and damage levels are given:

[0101] Overtopping failure: When damage level i = 1, the median overtopping amount is 0.005m. 3 / (m·s), the corresponding logarithmic mean is -5.298, and the logarithmic standard deviation is 0.53; when the damage level i=2, the median overflight amount is 0.01m. 3 / (m·s), the corresponding logarithmic mean is -4.605, and the logarithmic standard deviation is 0.92; when the damage level i = 3, the median overflight amount is 0.05m. 3 / (m·s), the corresponding logarithmic mean is -2.996, and the logarithmic standard deviation is 0.30.

[0102] Slip failure: When damage level i = 1, the median slip is 0.1 m, the corresponding logarithmic mean is -2.303, and the logarithmic standard deviation is 0.46; when damage level i = 2, the median slip is 0.4 m, the corresponding logarithmic mean is -0.916, and the logarithmic standard deviation is 0.37; when damage level i = 3, the median slip is 0.8 m, the corresponding logarithmic mean is -0.223, and the logarithmic standard deviation is 0.09.

[0103] Rock instability: When damage level i = 1, the median value of the rock erosion index is 2, the corresponding logarithmic mean is 0.693, and the logarithmic standard deviation is 0.14; when damage level i = 2, the median value of the rock erosion index is 4, the corresponding logarithmic mean is 1.386, and the logarithmic standard deviation is 0.28; when damage level i = 3, the median value of the rock erosion index is 8, the corresponding logarithmic mean is 2.079, and the logarithmic standard deviation is 0.21.

[0104] Foundation scour: When damage level i = 1, the median scour rate is 5%, the corresponding logarithmic mean is -2.996, and the logarithmic standard deviation is 0.30; when damage level i = 2, the median scour rate is 10%, the corresponding logarithmic mean is -2.303, and the logarithmic standard deviation is 0.46; when damage level i = 3, the median scour rate is 20%, the corresponding logarithmic mean is -1.609, and the logarithmic standard deviation is 0.32.

[0105] S32, Calculate the probability P(DM) corresponding to different damage levels i. i ).

[0106] The probability of a certain damage level is calculated as the difference in exceedance probabilities between two vulnerability curves, using the following formula:

[0107] P(DM i ) = P i -P i+1

[0108] In the formula, P i It is the exceedance probability read on the i-th fragility curve, P i+1 This is the exceedance probability read from the fragility curve at level i+1. Specifically, when i = 0, P0 = 1, and P(DM0) = 1 - P1 represents the probability that the levee will not be damaged. When i = max, P(DM0) = 1 - P1 represents the probability that the levee will not be damaged. max ) = P max -0 = P max .

[0109] Damage to breakwaters and revetment structures under wave action has always been a difficult indicator to assess. Step three of this invention introduces probabilistic analysis, innovatively providing vulnerability curves for multi-level damage to breakwaters under four failure modes: wave overtopping failure, slippage failure, rock bursting, and foundation scour. These curves help assess the probability of different damage levels to breakwaters and revetment structures under specific engineering requirements, facilitating breakwater feasibility assessments and post-disaster repairs.

[0110] In a preferred embodiment of the present invention, step four involves assessing the losses caused by different damage levels based on three performance indicators: casualty rate, economic loss rate, and repair efficiency. A resilience assessment index is then calculated based on the decision-making ratio to form a resilience assessment result. Specifically, this includes:

[0111] S41, based on the actual conditions of the breakwater and revetment structure area, obtain the casualty rate c corresponding to different damage levels i. i Economic loss rate e i Repair efficiency r i .

[0112] The casualty rate, economic loss rate, and repair efficiency performance indicators exhibit a probability distribution depending on the damage level, market conditions, dike type, and dike scale. When historical data is sufficient, the median and deviation values ​​of each indicator can be obtained through sample statistics. If not, the values ​​suggested in this invention can be used.

[0113] The casualty rate refers to the ratio of casualties to the total number of people within the affected area of ​​the dike. When the damage level i = 1, the median value is 0.01%, the corresponding logarithmic mean is -9.210, and the logarithmic standard deviation is 1.84; when the damage level i = 2, the median value is 0.1%, the corresponding logarithmic mean is -6.908, and the logarithmic standard deviation is 1.38; when the damage level i = 3, the median value is 1%, the corresponding logarithmic mean is -4.605, and the logarithmic standard deviation is 0.46.

[0114] The economic loss rate includes the ratio of property damage and dike repair costs to the overall construction cost of the dike, which are caused by the disaster to the area where the breakwater and revetment structures are located. When the damage level i = 1, the median value is 10%, the corresponding logarithmic mean is -2.303, and the logarithmic standard deviation is 0.46; when the damage level i = 2, the median value is 25%, the corresponding logarithmic mean is -1.386, and the logarithmic standard deviation is 0.42; when the damage level i = 3, the median value is 60%, the corresponding logarithmic mean is -0.511, and the logarithmic standard deviation is 0.15.

[0115] Repair efficiency refers to the ratio of repair time to the construction time of the levee to be evaluated. When the damage level i = 1, the median value is 10%, the corresponding logarithmic mean is -2.303, and the logarithmic standard deviation is 0.92; when the damage level i = 2, the median value is 30%, the corresponding logarithmic mean is -1.204, and the logarithmic standard deviation is 0.48; when the damage level i = 3, the median value is 70%, the corresponding logarithmic mean is -0.357, and the logarithmic standard deviation is 0.14.

[0116] If there is limited understanding of the actual engineering situation, it is recommended to use the median value of the above performance indicators for different damage levels for evaluation.

[0117] S42, Calculate the performance index evaluation results. Specifically, the performance index is evaluated using the following formula:

[0118]

[0119]

[0120]

[0121] In the formula, C, E, and R are the performance evaluation results in terms of casualty rate, economic loss rate, and repair efficiency dimension, respectively. c i , e i , r i are the casualty rate, economic loss rate, and repair efficiency corresponding to different damage levels i.

[0122] S43. Determine the decision proportion of performance indicators and calculate the resilience evaluation index of the breakwater and revetment structures. Specifically, based on the decision proportion, the importance of the two performance indicators of economic loss rate and repair efficiency is selected. The influence of the decision proportion on the resilience evaluation index is expressed by the following formula:

[0123] RA = f E E + f R R

[0124] In the formula, RA is the resilience evaluation index, f E , f R are the decision proportions of economic loss rate and repair efficiency respectively, and there is a relationship of f E + f R = 1 between the parameters.

[0125] S44. Qualitatively evaluate the resilience results of the breakwater and revetment structures. Specifically, the resilience evaluation index RA quantitatively evaluates the resilience level of the breakwater and revetment structures under wave action. The larger the value of RA, the worse the resilience level of the breakwater and revetment structures to be evaluated. Optionally, the present invention recommends using the following criteria to qualitatively evaluate the resilience level of the breakwater and revetment structures. Further,

[0126] C ≤ 0.01% and RA ≤ 5%, level 1 resilience;

[0127] C ≤ 0.1% and RA ≤ 10%, level 2 resilience;

[0128] C ≤ 0.1% and 10% < RA ≤ 30%, level 3 resilience;

[0129] C ≤ 0.1% and 30% < RA ≤ 50%, level 4 resilience;

[0130] C > 0.1% or RA > 50%, level 5 resilience.

[0131] Step four of this invention proposes using casualty rate, economic loss rate, and repair efficiency to assess the performance level of dikes. It creatively provides distribution curves for these performance indicators and calculation formulas for the performance assessment results, and proposes a set of qualitative evaluation standards based on the casualty rate assessment result C and the resilience assessment index RA. This achieves innovation in evaluation technology, high engineering operability, and unification of dike evaluation in both engineering and decision-making fields.

[0132] Based on the same inventive concept, in other embodiments, a system for evaluating the erosion toughness of breakwaters and revetment structures under wave action is provided, comprising:

[0133] The hydrology module integrates hydrological data of the area where the breakwater and revetment structures are located, and obtains representative wave hydrological characteristic values.

[0134] The engineering requirements module collects design site information for the breakwater and revetment structures to be evaluated, determines the dominant failure modes and corresponding engineering requirements parameters, and provides engineering requirements parameter values ​​under specific waves based on formulas, numerical values ​​or physical models.

[0135] Probability module: Compares the engineering requirement parameter values ​​with the vulnerability curve to obtain the damage level and probability distribution of the embankment to be evaluated;

[0136] Assessment Results Module: Based on three performance indicators—casualty rate, economic loss rate, and repair efficiency—the module assesses the losses caused by different damage levels, calculates resilience assessment indicators based on decision-making ratios, and generates resilience assessment results.

[0137] Based on the same inventive concept, in other embodiments, a terminal is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it can be used to execute the erosion toughness assessment method for breakwaters and revetment structures under wave action, or to run the erosion toughness assessment system for breakwaters and revetment structures under wave action.

[0138] The specific implementation techniques of each module / unit in the above examples of the present invention can be referred to the corresponding steps of the wave action assessment method for breakwater and revetment structure under wave action in the above embodiments, and will not be repeated here.

[0139] Optionally, the memory is used to store programs; the memory may include volatile memory, such as random-access memory (RAM), such as static random-access memory (SRAM), double data rate synchronous dynamic random-access memory (DDR SDRAM), etc.; the memory may also include non-volatile memory, such as flash memory. The memory is used to store computer programs (such as application programs, functional modules, etc. that implement the above methods), computer instructions, etc., and the aforementioned computer programs, computer instructions, etc., can be partitioned and stored in one or more memories. Furthermore, the aforementioned computer programs, computer instructions, data, etc., can be accessed by the processor.

[0140] A processor is used to execute a computer program stored in memory to implement the various steps of the methods involved in the above embodiments. For details, please refer to the relevant descriptions in the preceding method embodiments.

[0141] The processor and memory can be separate structures or integrated structures. When the processor and memory are separate structures, they can be coupled together via a bus.

[0142] Based on the same inventive concept, in other embodiments, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, can be used to perform the erosion toughness assessment method for breakwaters and revetments under wave action, or to run the erosion toughness assessment system for breakwaters and revetments under wave action.

[0143] Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of computer programs from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Alternatively, the ASIC can reside in a user device. Of course, the processor and storage medium can also exist as separate components in a communication device.

[0144] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0145] This application is described in accordance with flowcharts and / or block diagrams of the methods, apparatus (systems), and computer program products of this application. It will be understood that each block of the flowcharts and / or block diagrams, as well as combinations of 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, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, produce a machine for implementing the flowcharts and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0146] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0147] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby enabling the instructions that execute on the computer or other programmable equipment to provide for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0148] To provide a clearer, more detailed, and complete understanding of the technical solution of this invention, a specific embodiment is provided, and its toughness assessment process is as follows:

[0149] (1) Step 1: By investigating and collecting regional hydrological data on the breakwater, it was found that the frequency of storm surge disasters in the area is relatively high. Based on the importance of the breakwater, a hydrological characteristic value of once in 50 years was selected for subsequent evaluation. Specifically, the effective wave height H s=3m, period T =7s, water depth d =12.3m, wave direction angle β =0°.

[0150] (2) Step two: Collect site information for the design of the breakwater. This breakwater is vertical, constructed with monolithic concrete, and has a relatively solid underlying foundation. Its cross-sectional geometric dimensions are as follows: Figure 2 As shown. Specifically, the width of the embankment B = 10m, and the height of the embankment h = 16.2m.

[0151] Based on the basic failure mode suggested above in this invention, combined with hydrological data and site information, it is considered that the regional storm surge hazard is relatively large, and the foundation is solid with good overall concrete performance, so the probability of foundation erosion and boulder instability is low. Therefore, wave overtopping failure is identified as the dominant failure mode of this breakwater.

[0152] The engineering requirement parameter corresponding to this failure mode is the wave overtopping, which is calculated based on the wave overtopping formula for vertical breakwaters obtained from the Dalian University of Technology method:

[0153]

[0154] In the formula, Q is the wave displacement, and g is the gravitational acceleration, taken as 9.80 m / s². 2 H s Where d is the effective wave height, d is the water depth, and R is the effective wave height. c For the superelevation of the levee crest, γ β This is a factor that reduces the amount of water overflowed.

[0155] Specifically, in this embodiment, the superelevation of the embankment crest is R. c =3.9m, wave direction angle β = 0° corresponding to wave overshoot reduction factor γ β =1.00. Therefore, the overtopping amount Q is calculated to be 0.022m. 3 / (m·s).

[0156] (3) Step three, see Figure 3 (a) By referring to the overrun vulnerability curve given in this invention, the overrun probabilities of different damage levels can be read as: P1 = 99.7%, P2 = 80.4%, P3 = 0.3%.

[0157] The probability corresponding to different damage levels i can be calculated using the following formula:

[0158] P(DM i ) = P i -P i+1

[0159] Specifically, P(DM0) = 0.3%, P(DM1) = 19.3%, P(DM2) = 80.1%, and P(DM3) = 0.3%.

[0160] (4) Step four, see Figure 4 For each performance index, a probability distribution is presented, and the median value is selected to evaluate different damage levels. Specifically, when the damage level i = 1, c1 = 0.01%, e1 = 10%, r1 = 10%; when the damage level i = 2, c2 = 0.1%, e2 = 25%, r2 = 30%; when the damage level i = 3, c3 = 1%, e3 = 60%, r3 = 70%.

[0161] Calculate the performance evaluation results corresponding to the casualty rate, economic loss rate, and repair efficiency according to the following formulas respectively:

[0162] C = P(DM1)c1 + P(DM2)c2 + P(DM3)c3 = 0.08503%

[0163] E = P(DM1)e1 + P(DM2)e2 + P(DM3)e3 = 22.135%

[0164] R = P(DM1)r1 + P(DM2)r2 + P(DM3)r3 = 26.17%

[0165] The decision-making proportions for the economic loss rate and repair efficiency are respectively: f E = 0.6, f R = 0.4. Thus, the toughness evaluation index is calculated as: [[ID=2,2]]

[0166] RA = 0.6×22.135% + 0.4×26.17% = 23.749%

[0167] According to the qualitative evaluation criteria recommended by the present invention, C ≤ 0.1% and 10% < RA ≤ 30%, and the breakwater and revetment structure is at the 3rd-level toughness level.

[0168] It can be seen that in this specific embodiment, from the perspective of performance, the evaluation indexes are transformed from traditional strength and deformation to more practical economic loss, repair time, etc., and an anti-impulse toughness evaluation method for breakwater and revetment structures is proposed. This method has great application value in the field of toughness evaluation of breakwater and revetment structures and other buildings affected by waves, and has certain guiding significance for the development of further toughness improvement technologies for hydraulic buildings.

[0169] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which do not affect the essence of the present invention. The above preferred features can be used in any combination without conflict.

Claims

1. A method for evaluating the erosion toughness of breakwaters and revetment structures under wave action, characterized in that, include: By integrating hydrological data of the area where the breakwater and revetment structures are located, representative wave hydrological characteristic values ​​can be obtained. Collect site information on the design of the breakwater and revetment structures to be evaluated, determine the dominant failure modes and corresponding engineering requirements parameters, and provide engineering requirements parameter values ​​under specific waves based on formulas, numerical values ​​or physical models. By comparing the engineering requirement parameter values ​​with the vulnerability curve, the damage level and probability distribution of the dike to be evaluated are obtained. Based on three performance indicators—casualty rate, economic loss rate, and repair efficiency—the losses caused by different damage levels are assessed, and resilience assessment indicators are calculated based on decision-making ratios to form resilience assessment results. The dominant failure mode refers to the failure mode that has the greatest impact on the overall performance of the dike, and it is obtained by combining the basic failure mode with the dike type: The basic failure modes include wave failure, slip failure, rock instability, and foundation scour. The rock instability is the recommended dominant failure mode for riprap embankments and concrete block embankments. The slippage failure is the recommended dominant failure mode for caisson breakwaters; When the foundation softness is below a set threshold, the foundation scour is the recommended dominant failure mode for vertical embankments. When the frequency of regional storm surge disasters exceeds the set threshold, the recommended dominant failure mode for vertical breakwaters and sloping breakwaters is the overtopping failure. The engineering requirement parameters refer to the parameters characterizing the performance of the levee required for levee resilience evaluation, and correspond to the dominant failure mode of the levee. The engineering requirements parameters corresponding to the basic failure modes of wave overrun failure, slippage failure, rock instability and foundation scour are wave overrun, slippage, rock erosion index and scour rate, respectively. The wave overtopping refers to the average unit width discharge of waves over the crest of the dike along its length, expressed as a parameter. Q express; The slippage refers to the horizontal displacement of the dike along its width under wave action, expressed as a parameter. S express; The erosion index of the boulders is calculated by the following formula: ； In the formula, As an indicator of rock erosion, A The cross-sectional erosion area, D n50 The nominal diameter of the stone block; The scouring rate is calculated by the following formula: ； In the formula, D For flushing rate, Z mf For maximum scouring depth, B The width of the embankment; The casualty rate, economic loss rate, and repair efficiency exhibit a probability distribution with respect to the damage level, market conditions, dike type, and dike scale. Based on three performance indicators—casualty rate, economic loss rate, and repair efficiency—the losses caused by different damage levels are assessed, and resilience assessment indicators are calculated based on decision-making ratios to form resilience assessment results. include: The evaluation is based on three performance indicators: casualty rate, economic loss rate, and repair efficiency, using the following formula: ； ； ； In the formula, C , E , R The performance evaluation results are presented in terms of casualty rate, economic loss rate, and repair efficiency. , The casualty rate, economic loss rate, and repair efficiency corresponding to different damage levels i; The impact of decision-making ratios on resilience assessment indicators is expressed by the following formula: ； In the formula, As a resilience assessment indicator, f E , f R These are the decision ratios for economic loss rate and repair efficiency, respectively, and there are parameters between them. f E + f R The relationship is equal to 1; Based on the aforementioned casualty rate assessment results and the toughness assessment index To evaluate the toughness level of breakwaters and revetment structures under wave action. A larger value indicates a worse level of resilience of the levee to be evaluated.

2. The method for evaluating the erosion toughness of breakwaters and revetment structures under wave action according to claim 1, characterized in that, The hydrological data includes parameters such as water level, wave height, period, wavelength, and flow velocity. The representative wave hydrological characteristic value refers to the hydrological parameter under a certain disaster frequency, wherein the disaster frequency includes once in fifty years, once in a hundred years, or once in a thousand years. The site information includes: geometric dimensions, building materials, geotechnical investigation information, and embankment type; The geometric dimensions refer to parameters that describe the spatial properties of the breakwater and revetment structures. The building materials include material types and material parameters; The geotechnical investigation information includes parameters that affect the performance of breakwaters and revetment structures; The types of dikes are classified by structural form into sloping and vertical types, and by construction materials into riprap dikes, caisson dikes, and concrete block dikes.

3. The method for evaluating the erosion toughness of breakwaters and revetment structures under wave action according to claim 1, characterized in that, The vulnerability curve is a vulnerability curve corresponding to the suggested basic failure mode of the dike, which represents the probability of the dike reaching or exceeding a given damage state. Based on the threshold parameters of engineering requirements, the damage level is divided into three levels. Assuming that the vulnerability curve follows a log-normal distribution, the median and log standard deviation corresponding to different basic failure modes and damage levels are obtained.

4. The method for evaluating the erosion toughness of breakwaters and revetment structures under wave action according to claim 1, characterized in that, The step of comparing the engineering requirement parameter values ​​with the vulnerability curve to obtain the damage level and probability distribution of the levee to be evaluated includes: The probability of a certain damage level is calculated by taking the difference in the exceedance probabilities of two lines as the value of the probability of a certain damage level, using the following formula: ； In the formula, Let i be the probability that the damage level of the dike is level i. P i It is the exceedance probability read from the i-th level vulnerability curve. P i+1 It is the exceedance probability read on the i+1 level vulnerability curve.

5. A system for assessing the erosion toughness of breakwaters and revetments under wave action, used to implement the method for assessing the erosion toughness of breakwaters and revetments under wave action as described in claim 1, characterized in that, include: The hydrology module integrates hydrological data of the area where the breakwater and revetment structures are located, and obtains representative wave hydrological characteristic values. The engineering requirements module collects design site information for the breakwater and revetment structures to be evaluated, determines the dominant failure modes and corresponding engineering requirements parameters, and provides engineering requirements parameter values ​​under specific waves based on formulas, numerical values ​​or physical models. Probability module: Compares the engineering requirement parameter values ​​with the vulnerability curve to obtain the damage level and probability distribution of the embankment to be evaluated; Assessment Results Module: Based on three performance indicators—casualty rate, economic loss rate, and repair efficiency—the module assesses the losses caused by different damage levels, calculates resilience assessment indicators based on decision-making ratios, and generates resilience assessment results.

6. A terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it can be used to perform the method of any one of claims 1-4, or to implement the system of claim 5.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program can be used to perform the method of any one of claims 1-4, or to implement the system of claim 5.

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