Method and system for determining seismic fortification standards based on remaining life

Abstract

The present invention discloses a method and system for determining seismic fortification standards based on remaining life, and the system includes an importance coefficient determination module, a probability distribution determination module, a exceedance probability determination module, a coefficient reduction calculation module and a fortification standard determination module. First, the importance coefficient determination module determines the importance coefficient corresponding to the service structure. Then, the probability distribution determination module calculates the extreme value type III probability distribution according to the importance coefficient. After that, the exceedance probability determination module determines the exceedance probability within the remaining life of the service structure according to the extreme value type III probability distribution. Then, the coefficient reduction calculation module calculates the corresponding importance coefficient within the remaining life of the service structure through the corresponding exceedance probability within the remaining life of the service structure. Finally, the fortification standard determination module determines the design acceleration response spectrum corresponding to the service structure as the seismic fortification standard within the remaining life based on the reduced importance coefficient, thereby realizing the quantitative calculation of the seismic fortification standard of the service structure.

Description

Technical Field

[0001] The present invention relates to the technical field of computer-aided design, and in particular to a method and system for determining earthquake-resistant fortification standards based on residual life. Background Art

[0002] The current structural engineering seismic design and assessment standards in my country include the "Code for Seismic Design of Buildings" (GB 50011-2010), "Code for Seismic Design of Highway Bridges" (JTG / T 2231-01—2020), and "Detailed Rules for Seismic Performance Evaluation of Highway Bridges" (JTG / T 2231-02—2021). The structural seismic fortification standards in these standards are expressed in the form of seismic influence coefficients (buildings) and seismic importance coefficients (bridges). The design acceleration response spectrum calculated by these importance coefficients can be used as the seismic fortification standard.

[0003] However, the coefficients in these specifications are all for newly built structures, and no clear provisions are made for the seismic fortification standards of engineering structures that have been in service for a certain number of years. In the seismic reinforcement and other renovation projects for serving structures, serving structures that use old specifications or even have not been seismically designed cannot meet the principle of consistency in earthquake risk when using the seismic fortification standards in the current specifications, and there is no engineering economy. Therefore, there is an urgent need for a method to determine the seismic fortification standards that takes into account the remaining service life of the structure, so as to provide a reliable and quantitative basis for the seismic reinforcement of serving structures and seismic assessment work in other renovation and expansion projects. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention proposes a method and system for determining the seismic fortification standard based on the remaining life, which can determine the seismic fortification standard based on the remaining life. The specific technical solution is as follows:

[0005] In a first aspect, a method for determining seismic fortification standards based on residual life is provided, comprising:

[0006] Determine the importance factor of the service structure;

[0007] Determine the extreme value type III probability distribution corresponding to the basic intensity according to the importance coefficient;

[0008] Determine the corresponding exceedance probability within the remaining life of the service structure through the extreme value type III probability distribution;

[0009] Calculate the reduced importance coefficient based on the corresponding exceedance probability within the remaining life of the service structure;

[0010] The design acceleration response spectrum corresponding to the service structure is determined based on the reduced importance coefficient, and the design acceleration response spectrum is used as the seismic fortification standard for the remaining life of the service structure.

[0011] In conjunction with the first aspect, in a first implementable manner of the first aspect, determining the importance coefficient of the service structure includes: determining the importance coefficient of the building structure, and / or determining the importance coefficient of the bridge structure;

[0012] Among them, the seismic influence coefficient of the building structure is determined according to the earthquake recurrence level and seismic fortification intensity of the location of the building structure, and the seismic influence coefficient is used as the importance coefficient of the building structure;

[0013] The seismic importance coefficient of the bridge structure is determined according to the earthquake recurrence period level and bridge type at the location of the bridge structure, and the seismic importance coefficient is used as the importance coefficient of the bridge structure.

[0014] In combination with the first aspect, in a second implementable manner of the first aspect, determining an extreme value type III probability distribution corresponding to the basic intensity includes:

[0015] Determine the power coefficient of the calculated intensity and probability extreme value distribution according to the basic intensity and the importance coefficient of the serving structure;

[0016] The extreme value type III probability distribution corresponding to the basic intensity is determined by calculating the power coefficient of the intensity and the probability extreme value distribution.

[0017] In combination with the first aspect, in a third achievable manner of the first aspect, determining the exceedance probability corresponding to the remaining service life of the service structure includes:

[0018] Determine the annual exceedance probability within the remaining life according to the remaining life of the service structure and the extreme value type III probability distribution;

[0019] The corresponding exceedance probability within the remaining service life of the service structure is determined based on the annual exceedance probability and the set design reference period.

[0020] In combination with the first aspect, in a fourth implementation manner of the first aspect, calculating the reduced importance coefficient includes:

[0021] Based on the principle of earthquake risk consistency, determine the annual exceedance probability corresponding to the exceedance probability within the set life span;

[0022] By setting the annual exceedance probability corresponding to the exceedance probability within the life span, the extreme value type III probability distribution corresponding to the set life span is determined;

[0023] Determine the earthquake intensity corresponding to the set lifespan based on the extreme value type III probability distribution, maximum earthquake intensity and intensity standard parameters corresponding to the set lifespan;

[0024] The reduced importance coefficient is determined by setting the corresponding earthquake intensity and basic intensity within the life span.

[0025] In a second aspect, a system for determining seismic fortification standards based on residual life is provided, comprising:

[0026] an importance coefficient determination module configured to determine an importance coefficient of a service structure;

[0027] A probability distribution determination module, configured to determine an extreme value type III probability distribution corresponding to the basic intensity according to the importance coefficient;

[0028] A exceedance probability determination module is configured to determine the exceedance probability corresponding to the remaining life of the service structure through an extreme value type III probability distribution;

[0029] A coefficient reduction calculation module is configured to calculate a reduced importance coefficient according to a corresponding exceedance probability within the remaining service life of the service structure;

[0030] The fortification standard determination module is configured to determine the design acceleration response spectrum corresponding to the service structure based on the reduced importance coefficient, and use the design acceleration response spectrum as the seismic fortification standard for the remaining life of the service structure.

[0031] In conjunction with the second aspect, in a first possible implementation of the second aspect, the importance coefficient determination module includes:

[0032] The building structure importance coefficient unit is configured to determine the seismic influence coefficient of the building structure according to the earthquake recurrence period level and the seismic fortification intensity at the location of the building structure, and the seismic influence coefficient is used as the importance coefficient of the building structure;

[0033] And / or, the bridge structure importance coefficient unit is configured to determine the seismic importance coefficient of the bridge structure according to the earthquake recurrence period level and bridge type of the location of the bridge structure, and the seismic importance coefficient is used as the importance coefficient of the bridge structure.

[0034] In combination with the second aspect, in a second possible implementation manner of the second aspect, the probability distribution determination module includes:

[0035] A calculation unit configured to determine a power coefficient of a calculated intensity and a probability extreme value distribution according to a basic intensity and an importance coefficient of a serving structure;

[0036] The determination unit is configured to determine the extreme value type III probability distribution corresponding to the basic intensity through the power coefficient of the calculated intensity and the probability extreme value distribution.

[0037] In combination with the second aspect, in a third implementable manner of the second aspect, the exceedance probability determination module includes:

[0038] An annual exceedance probability calculation unit is configured to determine an annual exceedance probability within the remaining life according to the remaining life of the service structure and the extreme value type III probability distribution;

[0039] The exceedance probability calculation unit is configured to determine the corresponding exceedance probability within the remaining service life of the service structure through the annual exceedance probability and the set design reference period.

[0040] In combination with the second aspect, in a fourth implementation manner of the second aspect, the coefficient reduction calculation module includes:

[0041] The annual exceedance probability calculation unit within the set life is configured to determine the annual exceedance probability corresponding to the exceedance probability within the set life based on the earthquake risk consistency principle;

[0042] A probability density distribution determination unit within a set life span is configured to determine an extreme value type III probability distribution corresponding to the set life span through an annual exceedance probability corresponding to the exceedance probability within the set life span;

[0043] The earthquake intensity determination unit within the set life span is configured to determine the earthquake intensity corresponding to the set life span according to the extreme value type III probability distribution, the maximum earthquake intensity and the intensity standard parameter corresponding to the set life span;

[0044] The importance coefficient reduction calculation unit is configured to determine the reduced importance coefficient by setting the corresponding earthquake intensity and basic intensity within the life span.

[0045] Beneficial effects: The method and system for determining the seismic fortification standard based on the remaining life of the present invention can determine the extreme value type III probability distribution corresponding to the basic intensity according to the importance coefficient of the service structure, and determine the corresponding exceedance probability within the remaining life of the service structure through the extreme value type III probability distribution. Then, according to the corresponding exceedance probability within the remaining life of the service structure, the importance coefficient after a period of reduction is calculated, so that the quantitative calculation of the seismic fortification standard of the service structure is realized in the form of the reduced importance coefficient, providing a reliable and quantitative basis for the seismic reinforcement of the service structure and the seismic assessment work in other renovation and expansion projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0047] Figure 1 A flowchart of a method for determining seismic fortification standards based on remaining life provided by an embodiment of the present invention;

[0048] Figure 2 A coefficient reduction calculation flow chart provided in one embodiment of the present invention;

[0049] Figure 3 A system block diagram of a system for determining seismic fortification standards based on remaining life provided by an embodiment of the present invention;

[0050] Figure 4 A module block diagram of an importance coefficient determination module provided by an embodiment of the present invention;

[0051] Figure 5 A block diagram of a probability distribution determination module provided by an embodiment of the present invention;

[0052] Figure 6 A block diagram of a exceedance probability determination module provided by an embodiment of the present invention;

[0053] Figure 7 A module block diagram of a coefficient reduction calculation module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0054] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0055] like Figure 1 The flowchart of the method for determining the seismic fortification standard based on the remaining life shown in FIG. 1 includes:

[0056] Step 1: Determine the importance coefficient of the service structure;

[0057] Step 2: Determine the extreme value type III probability distribution corresponding to the basic intensity according to the importance coefficient;

[0058] Step 3: Determine the corresponding exceedance probability within the remaining service life of the service structure through the extreme value type III probability distribution;

[0059] Step 4: Calculate the reduced importance coefficient according to the corresponding exceedance probability within the remaining service life of the service structure;

[0060] Step 5: Determine the design acceleration response spectrum corresponding to the service structure based on the reduced importance coefficient, and use the design acceleration response spectrum as the seismic fortification standard for the remaining life of the service structure.

[0061] Specifically, first, the importance coefficient corresponding to the service structure can be determined by looking up a table. Then, the extreme value type III probability distribution corresponding to the basic intensity can be calculated based on the importance coefficient. After that, the exceedance probability within the remaining life of the service structure is derived based on the calculated extreme value type III probability distribution. Then, the importance coefficient corresponding to the remaining life of the service structure is calculated by reduction based on the exceedance probability corresponding to the remaining life of the service structure. Finally, the design acceleration response spectrum corresponding to the service structure is determined based on the reduced importance coefficient, and the design acceleration response spectrum is used as the seismic fortification standard within the remaining life of the service structure. Thereby, the quantitative calculation of the seismic fortification standard of the service structure is realized, providing a reliable and quantitative basis for the seismic reinforcement of the service structure and the seismic assessment work in other renovation and expansion projects.

[0062] The method for determining the importance coefficient of the service structure in step 1 is described in detail below.

[0063] In this embodiment, optionally, in step 1, determining the importance coefficient of the service structure includes: determining the importance coefficient of the building structure, and / or determining the importance coefficient of the bridge structure;

[0064] Among them, the seismic influence coefficient of the building structure is determined according to the earthquake recurrence level and seismic fortification intensity of the location of the building structure, and the seismic influence coefficient is used as the importance coefficient of the building structure;

[0065] The seismic importance coefficient of the bridge structure is determined according to the earthquake recurrence period level and bridge type at the location of the bridge structure, and the seismic importance coefficient is used as the importance coefficient of the bridge structure.

[0066] Specifically, service structures can be divided into building structures and bridge structures. There are differences in the methods for determining the importance coefficients of these two service structures. When determining the importance coefficient of a building structure, the seismic recurrence level of the location of the building structure, that is, whether the location of the building structure is a frequent earthquake or a rare earthquake. And the earthquake fortification intensity, the seismic influence coefficient of the building structure is determined by looking up a table, and the seismic influence coefficient is used as the importance coefficient of the building structure. The correspondence table of the seismic influence coefficient, the earthquake recurrence level, and the earthquake fortification intensity is shown in Table 1 below.

[0067] Table 1

[0068] Earthquake fortification intensity 6 degrees 7 degrees 8 degrees 9 degrees Frequent earthquakes 0.04 0.08(0.12) 0.16(0.24) 0.32 Rare earthquake 0.28 0.50(0.72) 0.90(1.20) 1.4

[0069] The values ​​in brackets are used for areas with design basic seismic acceleration of 0.15g and 0.30g respectively.

[0070] When determining the importance coefficient of a bridge structure, the seismic importance coefficient of the bridge structure can be determined based on the earthquake recurrence level of the location of the bridge structure, that is, whether the location of the bridge structure belongs to E1 earthquake action or E2 earthquake action. As well as the bridge type, the seismic importance coefficient of the bridge structure can be determined by looking up a table, and the seismic importance coefficient is used as the importance coefficient of the bridge structure. The correspondence table between the seismic importance coefficient, earthquake recurrence level, and bridge type is shown in Table 2 below.

[0071] Table 2

[0072] Bridge seismic fortification category E1 Earthquake Action E2 Earthquake Action Category A 1 1.7 Category B 0.43(0.5) 1.3(1.7) Category C 0.34 1 Category D 0.23 -

[0073] Among them, the seismic importance coefficient of Class B bridges and extra-large bridges on expressways and first-class highways is the value in the brackets of Class B.

[0074] The following will explain in detail the calculation method of the extreme value type III probability distribution corresponding to the basic intensity determined in step 2.

[0075] In this embodiment, optionally, determining the extreme value type III probability distribution corresponding to the basic intensity includes:

[0076] Determine the power coefficient of the calculated intensity and probability extreme value distribution according to the basic intensity and the importance coefficient of the serving structure;

[0077] The extreme value type III probability distribution corresponding to the basic intensity is determined by calculating the power coefficient of the intensity and the probability extreme value distribution.

[0078] Specifically, first, the power coefficient of the calculated intensity and probability extreme value distribution can be determined according to the basic intensity and the importance coefficient of the service structure. The specific calculation formula is as follows:

[0079]

[0080]

[0081] ε=I e -1.55

[0082] Among them, I a To calculate the intensity, I e is the basic intensity, C i is the importance coefficient of the service structure, and k is the power coefficient of the probability extreme value distribution.

[0083] Then, the extreme value type III probability distribution corresponding to the basic intensity can be determined according to the power coefficient of the calculated intensity and probability extreme value distribution. The specific calculation formula is as follows:

[0084]

[0085] Among them, ω is the maximum earthquake intensity.

[0086] The calculation steps of the exceedance probability in step 3 will be explained in detail below.

[0087] In this embodiment, optionally, determining the corresponding exceedance probability within the remaining service life of the service structure includes:

[0088] Determine the annual exceedance probability within the remaining life according to the remaining life of the service structure and the extreme value type III probability distribution;

[0089] The corresponding exceedance probability within the remaining service life of the service structure is determined based on the annual exceedance probability and the set design reference period.

[0090] Specifically, first, the annual exceedance probability within the remaining life can be calculated by using the calculated extreme value type III probability distribution and the remaining life span. The specific calculation formula is as follows:

[0091]

[0092] Among them, v a is the annual exceedance probability corresponding to the exceedance probability within the remaining life, T l For the remaining life.

[0093] Then, the exceedance probability within the remaining life can be calculated based on the calculated annual exceedance probability. The specific calculation formula is as follows:

[0094]

[0095] Where p is the exceedance probability within the remaining lifetime, t L It is the design reference period for the service structure.

[0096] The following will explain in detail the reduction steps of the importance coefficient in step 4.

[0097] In this embodiment, optionally, Figure 2 As shown, the reduced importance coefficient is calculated, including:

[0098] Step 4-1: Based on the principle of earthquake risk consistency, determine the annual exceedance probability corresponding to the exceedance probability within the set life;

[0099] Step 4-2, by setting the annual exceedance probability corresponding to the exceedance probability within the life span, determine the extreme value type III probability distribution corresponding to the set life span;

[0100] Step 4-3, determining the earthquake intensity corresponding to the set life span according to the extreme value type III probability distribution, the maximum earthquake intensity and the intensity standard parameters corresponding to the set life span;

[0101] Step 4-4: Determine the reduced importance coefficient by setting the corresponding earthquake intensity and basic intensity within the service life.

[0102] Specifically, first, according to the principle of earthquake risk consistency, the above-calculated exceedance probability within the remaining life can be used to calculate the annual exceedance probability corresponding to the lower exceedance probability within the set life. The specific calculation formula is as follows:

[0103]

[0104] Among them, v b is the annual exceedance probability corresponding to the lower exceedance probability within the set life t.

[0105] Then, by calculating the annual exceedance probability corresponding to the lower exceedance probability within the set life, the extreme value type III probability distribution corresponding to the exceedance probability under the set life is determined. The specific calculation formula is as follows:

[0106]

[0107] Among them, p Ⅲ，b It is the extreme value type III probability distribution corresponding to the exceedance probability under the set life span.

[0108] Afterwards, the earthquake intensity corresponding to the set life span is calculated based on the calculated extreme value type III probability distribution corresponding to the exceedance probability under the set life span, as well as the maximum earthquake intensity and intensity standard parameters. The specific calculation formula is as follows:

[0109] I b =ω-(ω-ε)·[-ln(1-p Ⅲ，b )] 1 / k .

[0110] Finally, the reduced importance parameter can be calculated based on the calculated earthquake intensity and basic intensity within the set lifespan. The specific calculation formula is as follows:

[0111]

[0112] Among them, C r is the importance factor within the remaining life after reduction.

[0113] In this embodiment, after the reduced importance coefficient is calculated, the calculated importance coefficient C r Substituting the acceleration response spectrum corresponding to the service structure into the calculation formula, the design acceleration response spectrum corresponding to the service structure within the remaining life can be obtained. The design acceleration response spectrum can be used as the seismic fortification standard of the service structure within the remaining life.

[0114] Among them, the calculation formula of the acceleration response spectrum corresponding to the building structure is as follows:

[0115]

[0116] The calculation formula of the acceleration response spectrum corresponding to the bridge structure is as follows:

[0117]

[0118] Among them, T is the structural natural vibration period of the service structure, η1 is the downward slope adjustment coefficient of the linear downward section of the acceleration response spectrum, η2 is the seismic damping adjustment coefficient of the building structure, C s is the site coefficient of the service structure, C d is the seismic damping adjustment coefficient of the bridge structure, A is the peak acceleration of the basic ground motion, T g is the basic period and γ represents the exponential decay.

[0119] It should be understood that the above-mentioned related parameters are all known parameters in the art, and their specific values ​​have been specified in the corresponding standards and design specifications, which will not be repeated here.

[0120] like Figure 3 The system block diagram of the system for determining the seismic fortification standard based on the remaining life shown in the figure comprises:

[0121] an importance coefficient determination module configured to determine an importance coefficient of a service structure;

[0122] A probability distribution determination module, configured to determine an extreme value type III probability distribution corresponding to the basic intensity according to the importance coefficient;

[0123] A exceedance probability determination module is configured to determine the exceedance probability corresponding to the remaining life of the service structure through an extreme value type III probability distribution;

[0124] A coefficient reduction calculation module is configured to calculate a reduced importance coefficient according to a corresponding exceedance probability within the remaining service life of the service structure;

[0125] The fortification standard determination module is configured to determine the design acceleration response spectrum corresponding to the service structure based on the reduced importance coefficient, and use the design acceleration response spectrum as the seismic fortification standard for the remaining life of the service structure.

[0126] Specifically, the determination system is composed of an importance coefficient determination module, a probability distribution determination module, a exceedance probability determination module, a coefficient reduction calculation module and a fortification standard determination module. Among them, the importance coefficient determination module can determine the importance coefficient corresponding to the service structure by looking up a table. The probability distribution determination module can calculate the extreme value type III probability distribution corresponding to the basic intensity according to the importance coefficient. The exceedance probability determination module derives the exceedance probability within the remaining life of the service structure according to the calculated extreme value type III probability distribution. The coefficient reduction calculation module can calculate the importance coefficient corresponding to the remaining life of the service structure by the corresponding exceedance probability within the remaining life of the service structure in a reduced manner. The fortification standard determination module can determine the design acceleration response spectrum corresponding to the service structure based on the reduced importance coefficient, and use the design acceleration response spectrum as the seismic fortification standard within the remaining life of the service structure. Thereby, the quantitative calculation of the seismic fortification standard of the service structure is realized, providing a reliable and quantitative basis for the seismic reinforcement of the service structure and the seismic assessment work in other renovation and expansion projects.

[0127] In this embodiment, optionally, Figure 4 As shown, the importance coefficient determination module includes:

[0128] The building structure importance coefficient unit is configured to determine the seismic influence coefficient of the building structure according to the earthquake recurrence period level and the seismic fortification intensity at the location of the building structure, and the seismic influence coefficient is used as the importance coefficient of the building structure;

[0129] And / or, the bridge structure importance coefficient unit is configured to determine the seismic importance coefficient of the bridge structure according to the earthquake recurrence period level and bridge type of the location of the bridge structure, and the seismic importance coefficient is used as the importance coefficient of the bridge structure.

[0130] Specifically, the importance coefficient determination module is composed of a building structure importance coefficient unit and a bridge structure importance coefficient unit. The building structure importance coefficient unit is used to determine the importance coefficient corresponding to the building structure. The building structure importance coefficient unit can determine the seismic influence coefficient of the building structure in the form of a table lookup according to the earthquake recurrence level and earthquake fortification intensity of the location of the building structure, and use the seismic influence coefficient as the importance coefficient of the building structure.

[0131] The bridge structure importance coefficient unit is used to determine the importance coefficient corresponding to the bridge structure. The bridge structure importance coefficient unit can determine the seismic importance coefficient of the bridge structure in the form of a table lookup according to the earthquake recurrence level and bridge type of the location of the bridge structure, and use the seismic importance coefficient as the importance coefficient of the bridge structure.

[0132] In this embodiment, optionally, Figure 5As shown, the probability distribution determination module includes:

[0133] A calculation unit configured to determine a power coefficient of a calculated intensity and a probability extreme value distribution according to a basic intensity and an importance coefficient of a serving structure;

[0134] The determination unit is configured to determine the extreme value type III probability distribution corresponding to the basic intensity through the power coefficient of the calculated intensity and the probability extreme value distribution.

[0135] Specifically, the probability distribution determination module is composed of a calculation unit and a determination unit. The calculation unit can determine the power coefficient of the calculation intensity and probability extreme value distribution according to the basic intensity and the importance coefficient of the service structure. The specific calculation formula is shown above and will not be repeated here.

[0136] The determination unit can determine the extreme value type III probability distribution corresponding to the basic intensity according to the power coefficient of the calculated intensity and probability extreme value distribution. The specific calculation formula is shown above and will not be repeated here.

[0137] In this embodiment, optionally, Figure 6 As shown, the exceedance probability determination module includes:

[0138] An annual exceedance probability calculation unit is configured to determine an annual exceedance probability within the remaining life according to the remaining life of the service structure and the extreme value type III probability distribution;

[0139] The exceedance probability calculation unit is configured to determine the corresponding exceedance probability within the remaining service life of the service structure through the annual exceedance probability and the set design reference period.

[0140] Specifically, the exceedance probability determination module is composed of an annual exceedance probability calculation unit and an exceedance probability calculation unit. Among them, the annual exceedance probability calculation unit can calculate the annual exceedance probability within the remaining life by calculating the extreme value type III probability distribution and the remaining life span. The exceedance probability calculation unit can calculate the exceedance probability within the remaining life according to the calculated annual exceedance probability. The specific calculation formulas of the annual exceedance probability and the exceedance probability are shown above and will not be repeated here.

[0141] In this embodiment, optionally, Figure 6 As shown, the coefficient reduction calculation module includes:

[0142] The annual exceedance probability calculation unit within the set life is configured to determine the annual exceedance probability corresponding to the exceedance probability within the set life based on the earthquake risk consistency principle;

[0143] A probability density distribution determination unit within a set life span is configured to determine an extreme value type III probability distribution corresponding to the set life span through an annual exceedance probability corresponding to the exceedance probability within the set life span;

[0144] The earthquake intensity determination unit within the set life span is configured to determine the earthquake intensity corresponding to the set life span according to the extreme value type III probability distribution, the maximum earthquake intensity and the intensity standard parameter corresponding to the set life span;

[0145] The importance coefficient reduction calculation unit is configured to determine the reduced importance coefficient by setting the corresponding earthquake intensity and basic intensity within the life span.

[0146] Specifically, the coefficient reduction calculation module is composed of a calculation unit for annual exceedance probability within a set life, a unit for determining probability density distribution within a set life, a unit for determining earthquake intensity within a set life, and a calculation unit for reducing importance coefficients. Among them, the calculation unit for annual exceedance probability within a set life can calculate the exceedance probability within the remaining life obtained by the above calculation according to the principle of consistency of earthquake risk to obtain the annual exceedance probability corresponding to the lower exceedance probability within the set life.

[0147] The probability density distribution determination unit within the set life can determine the extreme value type III probability distribution corresponding to the exceedance probability under the set life by calculating the annual exceedance probability corresponding to the lower exceedance probability under the set life. The earthquake intensity determination unit within the set life can calculate the earthquake intensity corresponding to the set life according to the calculated extreme value type III probability distribution corresponding to the exceedance probability under the set life, as well as the maximum earthquake intensity and the intensity standard parameter. The importance coefficient reduction calculation unit can calculate the reduced importance parameter according to the calculated earthquake intensity corresponding to the set life and the basic intensity.

[0148] The defense standard determination module can calculate the reduced importance coefficient C by the coefficient reduction calculation module. r Substituting the acceleration response spectrum corresponding to the service structure into the calculation formula, the design acceleration response spectrum corresponding to the service structure within the remaining life can be obtained. The design acceleration response spectrum can be used as the seismic fortification standard of the service structure within the remaining life.

[0149] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A method for determining seismic fortification standards based on residual life, characterized in that: include: Determine the importance factor of the service structure; Determine the extreme value type III probability distribution corresponding to the basic intensity according to the importance coefficient; Determine the corresponding exceedance probability within the remaining life of the service structure through the extreme value type III probability distribution; The importance coefficient corresponding to the remaining service life of the service structure is calculated according to the exceedance probability corresponding to the remaining service life of the service structure, including: Based on the principle of earthquake risk consistency, determine the annual exceedance probability corresponding to the exceedance probability within the set life span; By setting the annual exceedance probability corresponding to the exceedance probability within the life span, the extreme value type III probability distribution corresponding to the set life span is determined; Determine the earthquake intensity corresponding to the set lifespan based on the extreme value type III probability distribution, maximum earthquake intensity and intensity standard parameters corresponding to the set lifespan; The reduced importance coefficient is determined by setting the corresponding earthquake intensity and basic intensity within the life span; The design acceleration response spectrum corresponding to the service structure is determined based on the reduced importance coefficient, and the design acceleration response spectrum is used as the seismic fortification standard for the remaining life of the service structure. The calculation formula of the acceleration response spectrum corresponding to the building structure is as follows: The calculation formula of the acceleration response spectrum corresponding to the bridge structure is as follows: Among them, T is the structural natural vibration period of the service structure, η1 is the downward slope adjustment coefficient of the linear downward section of the acceleration response spectrum, η2 is the seismic damping adjustment coefficient of the building structure, and C s is the site coefficient of the service structure, C d is the seismic damping adjustment coefficient of the bridge structure, A is the peak acceleration of the basic ground motion, T g is the basic period and γ represents the exponential decay.

2. The method for determining the seismic fortification standard based on the remaining life according to claim 1 is characterized in that: Determining the importance coefficient of the service structure, including: determining the importance coefficient of the building structure, and / or determining the importance coefficient of the bridge structure; Among them, the seismic influence coefficient of the building structure is determined according to the earthquake recurrence level and seismic fortification intensity of the location of the building structure, and the seismic influence coefficient is used as the importance coefficient of the building structure; The seismic importance coefficient of the bridge structure is determined according to the earthquake recurrence period level and bridge type at the location of the bridge structure, and the seismic importance coefficient is used as the importance coefficient of the bridge structure.

3. The method for determining the seismic fortification standard based on the remaining life according to claim 1, characterized in that: Determine the extreme value type III probability distribution corresponding to the basic intensity, including: Determine the power coefficient of the calculated intensity and probability extreme value distribution according to the basic intensity and the importance coefficient of the serving structure; The extreme value type III probability distribution corresponding to the basic intensity is determined by calculating the power coefficient of the intensity and the probability extreme value distribution.

4. The method for determining the seismic fortification standard based on the remaining life according to claim 1, characterized in that: Determine the corresponding exceedance probability within the remaining service life of the service structure, including: Determine the annual exceedance probability within the remaining life according to the remaining life of the service structure and the extreme value type III probability distribution; The corresponding exceedance probability within the remaining service life of the service structure is determined based on the annual exceedance probability and the set design reference period.

5. A system for determining seismic fortification standards based on residual life, characterized in that: include: an importance coefficient determination module configured to determine an importance coefficient of a service structure; A probability distribution determination module, configured to determine an extreme value type III probability distribution corresponding to the basic intensity according to the importance coefficient; A exceedance probability determination module is configured to determine the exceedance probability corresponding to the remaining life of the service structure through an extreme value type III probability distribution; The coefficient reduction calculation module is configured to calculate the importance coefficient corresponding to the remaining service life of the service structure according to the corresponding exceedance probability within the remaining service life of the service structure, and the coefficient reduction calculation module includes: The annual exceedance probability calculation unit within the set life is configured to determine the annual exceedance probability corresponding to the exceedance probability within the set life based on the earthquake risk consistency principle; A probability density distribution determination unit within a set life span is configured to determine an extreme value type III probability distribution corresponding to the set life span through an annual exceedance probability corresponding to the exceedance probability within the set life span; The earthquake intensity determination unit within the set life span is configured to determine the earthquake intensity corresponding to the set life span according to the extreme value type III probability distribution, the maximum earthquake intensity and the intensity standard parameter corresponding to the set life span; The importance coefficient reduction calculation unit is configured to determine the reduced importance coefficient by setting the corresponding earthquake intensity and basic intensity within the life span; A fortification standard determination module is configured to determine a design acceleration response spectrum corresponding to the service structure based on the reduced importance coefficient, and use the design acceleration response spectrum as the seismic fortification standard for the remaining life of the service structure; The calculation formula of the acceleration response spectrum corresponding to the building structure is as follows: The calculation formula of the acceleration response spectrum corresponding to the bridge structure is as follows: Among them, T is the structural natural vibration period of the service structure, η1 is the downward slope adjustment coefficient of the linear downward section of the acceleration response spectrum, η2 is the seismic damping adjustment coefficient of the building structure, and C s is the site coefficient of the service structure, C d is the seismic damping adjustment coefficient of the bridge structure, A is the peak acceleration of the basic ground motion, T g is the basic period and γ represents the exponential decay.

6. The system for determining seismic fortification standards based on residual life according to claim 5, characterized in that: The importance coefficient determination module includes: The building structure importance coefficient unit is configured to determine the seismic influence coefficient of the building structure according to the earthquake recurrence period level and the seismic fortification intensity at the location of the building structure, and the seismic influence coefficient is used as the importance coefficient of the building structure; And / or, the bridge structure importance coefficient unit is configured to determine the seismic importance coefficient of the bridge structure according to the earthquake recurrence period level and bridge type of the location of the bridge structure, and the seismic importance coefficient is used as the importance coefficient of the bridge structure.

7. The system for determining seismic fortification standards based on residual life according to claim 5, characterized in that: The probability distribution determination module comprises: A calculation unit configured to determine a power coefficient of a calculated intensity and a probability extreme value distribution according to the basic intensity and an importance coefficient of the service structure; The determination unit is configured to determine the extreme value type III probability distribution corresponding to the basic intensity by calculating the intensity and the power coefficient of the probability extreme value distribution.

8. The system for determining seismic fortification standards based on residual life according to claim 5, characterized in that: The exceedance probability determination module comprises: An annual exceedance probability calculation unit is configured to determine an annual exceedance probability within the remaining life according to the remaining life of the service structure and the extreme value type III probability distribution; The exceedance probability calculation unit is configured to determine the corresponding exceedance probability within the remaining service life of the service structure through the annual exceedance probability and the set design reference period.

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