This standard specifies the basic principles and methods of limit state design based on structural reliability theory, and should be used as a common criterion for the formulation of railway engineering structural design specifications such as railway bridges, tunnels, tracks, roadbeds and supporting buildings. It also applies to the construction and use stages of the structure, including production, transportation, loading and unloading, and installation. GB 50216-1994 Unified Standard for Reliability Design of Railway Engineering Structures GB50216-1994 Standard download decompression password: www.bzxz.net

Engineering construction standard full text information system
National Standard of the People's Republic of China
Reliability of railway engineering structures
Unified design standard
50216—94
Unified design standard for reliabilityof railway engineering structuresConstruction standard
1994—09—10
1995—05—01
State Administration of Technical Supervision
Jointly issued
Ministry of Construction of the People's Republic of China
Engineering construction standard full text information system
Engineering construction standard full text information system
National Standard of the People's Republic of China
Reliability of railway engineering structures
Unified design standard
Unified design standard for reliabilityof railway engineering structuresGB50216--94
Editor department: Ministry of Railways of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: May 1, 1995
Engineering construction standard full text information system
Engineering construction standard full text information system
Notice on the release of the national standard "Uniform standard for reliability design of railway engineering structures"
Construction Standard [1994] No. 570
According to the requirements of the State Planning Commission's document [1985] No. 1, the "Uniform standard for reliability design of railway engineering structures" jointly compiled by the Ministry of Railways and relevant departments has been reviewed by relevant departments. The "Uniform standard for reliability design of railway engineering structures" GB50216-94 is now approved as a mandatory national standard and will be implemented from May 1, 1995. The Ministry of Railways is responsible for the management of this standard, and its specific interpretation and other work is the responsibility of the Ministry of Railways Scientific Research Institute, and the publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
September 10, 1994
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Terms and symbols..…
3 Principles and methods of limit state design·
General provisions
3.2 Basic variables and comprehensive variables
3.3 Limit state design methods
Actions and combinations of actions
Classification of actions·
Design parameters and effects of actions…4.2
Combination of actions
Performance of materials and geotechnical materials·
Geometric parameters|| tt||Structural analysis and testing
Partial factor method for limit state design
General provisionswwW.bzxz.Net
Limit state design expressions
Practical design formula for limit state design expressed by partial factors·Selection of partial factors, combination factors and importance factors in limit state design formula
9 Fatigue reliability of steel and concrete structures·9.1
General provisions
9.2 Verification of fatigue reliability of steel structures under variable amplitude repeated loads Engineering Construction Standard Full Text Information System
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Engineering Construction Standard Full-text Information System
9.3 Verification of fatigue reliability of concrete structure under variable amplitude repeated load..…（30)10 Quality control...
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Method for determining the probability distribution of basic variables and comprehensive variables·……（34)Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F||tt ||Appendix G
Appendix H
Appendix J
Quantile value method for calculating structural reliability index
Selection method of structural target reliability index - calibration method··(36)
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Method for determining the standard value and probability distribution of permanent action. Method for determining the representative value and probability distribution of variable action. (42) Method for determining the probability distribution of railway train load effect. (44) Method for determining the probability distribution of material properties. Sub-item system of basic variables in the design formula for the ultimate limit state of bearing capacity. Method for selecting numbers
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Method for selecting combination coefficients and combination partial coefficients in the ultimate limit state design formula
KMethod for selecting comprehensive resistance partial coefficients in the serviceability limit state design formula Appendix K
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Appendix L
Method for formulating standard load spectrum and standard load effect spectrum for railway trains...
Calculation method for fatigue reliability of steel structures
Appendix M
Appendix N||tt| |Calculation Method for Fatigue Reliability of Concrete Structures Explanation of Terms Used in This Standard
Appendix P
Additional Explanation
Engineering Construction Standard Full Text Information System
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Engineering Construction Standard Full Text Information System
1.0.1 This standard is formulated to unify the basic principles and methods of railway engineering design so that the design meets the requirements of advanced technology, economic rationality, safety and applicability, and quality assurance. 1.0.2 This standard specifies the basic principles and methods of limit state design based on structural reliability theory, which should be used as a common criterion for formulating railway engineering structure design specifications such as railway bridges, tunnels, tracks, roadbeds and supporting buildings. It is also applicable to the construction and use stages of the structure, including manufacturing, transportation, loading and unloading, and installation. 1.0.3 Railway engineering structures shall meet the following functional requirements at the specified reliability level:
(1) Able to withstand various effects that may occur during construction and use; (2) Have appropriate working performance under normal use and maintenance; (3) Have sufficient durability such as corrosion resistance and freeze-thaw resistance under normal maintenance; (4) Maintain the required overall stability during and after the occurrence of accidental events specified in the design.
1.0.4 The reliability design of railway engineering structures shall specify an appropriate design reference period in combination with the expected service life, and the design reference period should be 50 or 100 years. The design reference period of engineering structures directly related to train operation can be determined according to the total weight of the train passing through.
1.0.5 Railway engineering structures shall adopt the safety level specified in Table 1.0.5 according to the severity of the consequences of possible structural damage.
1.0.6 The engineering structure shall be divided into two types of failure, ductile failure or brittle failure, according to whether there is obvious deformation or other signs before the failure. The reliability of brittle failure shall be appropriately higher than that of ductile failure.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Safety Level of Engineering Structure
Safety Level
Failure Consequences
Very Serious
Not Serious
Note: The safety level of special railway engineering structures can be determined according to specific circumstances. 7 In order to ensure that the railway engineering structure has the required reliability level, effective quality management and control shall be carried out for the survey, design, construction, use and maintenance of the structure. In addition to meeting the requirements of this standard, the reliability design of railway engineering structures shall also meet the relevant provisions of the current national standard "Uniform Standard for Reliability Design of Engineering Structures". Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
2 Terms and Symbols
1 Reliability reliability
The ability of a structure to complete its intended function within a specified time and under specified conditions. It includes safety, applicability and durability. When measured by probability, it is called the reliability of the structure.
2.1.2 Design reference period design reference period When calculating the reliability of a structure under permanent design conditions, the reference time used to consider the relationship between various basic variables and time. 2.1.3 Safety classes safety classes
In order to make the structure reasonably safe, the design classes are divided according to the severity of the consequences of the failure of the engineering structure.
2.1.4 Ductile failure
The type of failure in which the structure or component has obvious deformation or other precursors before failure. 2.1.5 Brittle failure Brittle failure
A type of failure in which there is no obvious deformation or other signs before the structure or component fails. 2.1.6 Ultimate limit states Ultimate limit states A limit state in which a structure or component reaches its maximum bearing capacity or reaches a large deformation that is not suitable for continued bearing.
2.1.7 Serviceability limit states A limit state in which a structure or component reaches a certain limit value allowed by its use function. 2.1.8
Design situation Design situation The different structural states and environmental conditions considered in the entire process from construction to use of a structure are called the design situation of the structure. The distribution (or process) of each reliability-related data within the period referred to by the design situation can be considered constant in the design. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
2.1.9 Persistent situation A design situation that lasts for a long time and is of the same order of magnitude as the design reference period of the structure.
2.1.10 transient situation transient situation design situation with short duration and high probability of occurrence. 2.1.11 accidental situation accidental situation design situation with short duration (including when and after the accident) and low probability of occurrence.
2.1.12 basic variable basicvariable
are the main variables affecting the reliability of the structure. These variables should be measurable physical quantities, generally random variables, including action, material properties and geometric parameters. 2.1.13 reliability index reliability index is a quantitative index to measure the reliability of the structure. It is the inverse function of the standard normal distribution of the probability of structural reliability.
2.1.14 probability of failure probability of structural failure the probability that the structure or component cannot complete the predetermined function. 2.1.15 structural function function of structural performance composed of basic variables, reflecting the function of the structure. 2.1.16 limit state equation limitstateequation when the structure or component is in the limit state, the relationship between the basic variables. 2.1.17 Calibration method calibration method A method of determining the self-standard reliability index used in the design of a structure or component by inverse analysis of the reliability level implied by the existing structure, component or current design specification.
Analogical method of risk level 2.1.18
A method of evaluating and determining the target reliability index of a structure or component by comparing the degree of risk people take when participating in various activities and their responses to it. 2.1.19 Action action
The concentrated or distributed force applied to the structure, or the cause of the deformation or constraint of the structure. The former is called direct action, which can also be called load, and the latter is called indirect action.
2.1.20 Permanent action permanent action An action whose value does not change with time or whose change is negligible compared with the average value in a given entire design situation. 2.1.21 Variable action variable action Action whose value varies with time in a given design situation and whose change is not negligible compared with the average value.
2.1.22 Fixed action fixed action
Action with fixed distribution on the structure. 2.1.23 Free action free action
Action that can be arbitrarily distributed within a certain range on the structure. 2.1.24 Dynamic action dynamic action
Action that causes a structure or component to produce non-negligible acceleration. 2.1.25 Static action static action
Action that does not cause a structure or component to produce non-negligible acceleration. 2.1.26 Accidental action accidental action Action that may not appear within the expected time period, but once it appears, its value is large and the duration is short.
2.1.27 Representative value of action representative value of actions When designing structures or components, the different values ​​taken by actions due to different self-determination are called representative values ​​of actions. It includes standard value, quasi-permanent value, frequent value, etc. 2.1.28 Characteristic value of actions The main representative value of the action. Its value can be determined according to a certain quantile value of the maximum probability distribution within the design reference period.
2.1.29 Effects of actions The internal force and deformation of the structure or component caused by the action. 2.1.30 Combination of actions When designing a structure or component, it is expected that there will be several different actions that may appear at the same time. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Fundamental combination of actions 2.1.31
When the structure or component is designed according to the ultimate limit state of bearing capacity, the combination of permanent actions and variable actions.
2.1.32 Accidental combination of actions When the structure or component is designed according to the ultimate limit state of bearing capacity, the combination of permanent actions, variable actions and an accidental action.
2.1.33 Quasi-permanent combination (long-term combination) Quasi-permanent combination The combination of quasi-permanent values ​​of permanent and variable actions when a structure or component is designed according to the serviceability limit state.
2.1.34 Frequent combination (short-term combination) Frequent combination The combination of frequent values ​​of permanent and variable actions when a structure or component is designed according to the serviceability limit state.
2.1.35 Characteristic value of a material property
The basic representative value of a material property used in the design of a structure or component. This value can be determined based on a certain quantile value of the probability distribution of the performance of a material that meets the specified standards. 2.1.36 Nominal value of geometrical parameter
The basic representative value of a geometrical parameter used in the design of a structure or component. Its value can be determined according to the value specified in the design documents.
2.1.37 Design value of an action The value obtained by multiplying the representative value of an action by the partial coefficient of the action. 2.1.38 Design value of material property The value obtained by dividing the standard value of material property by the partial coefficient of material property. 2.1.39 Additive geometrical quantity The adjusted value used to reflect the possible deviation of the geometric parameters of the actual structure or component from the standard value.
2.1.40 Partial coefficient Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
To ensure that the designed structure or component has the specified reliability, the coefficient used in the design expression of the structural limit state. 2.1.41 Coefficient for importance of structure The additional adjustment coefficient for the action effect specified according to the safety level of the structure. 2.1.42 Coefficient for combination of actions The reduction coefficient for the probability of the most unfavorable values ​​of several independent actions occurring simultaneously in the action combination.
2.1.43 Constraint value constraint value
The limit value of stress, deformation, etc. used as a sign of the limit state when designing a structure or component.
2.1.44 Reliability index for fatigue reflects the reliability level of a structure or component against fatigue failure. 2.1.45 Ultimate limit state for fatigue Under repeated loads, the structure or part of the structure is unsuitable for continued bearing due to fatigue failure of the material, referred to as the fatigue limit state 2.1.46 Serviceability limit state for fatigue
Under repeated loads, the structure or part of the structure reaches the limit state that is unsuitable for normal use due to fatigue of the material or detailed structure, referred to as the fatigue serviceability limit state.
2.1.47 Standard load spectrum standard load spectrum The relationship between the strength and frequency of the material or detailed structure under repeated loads specified by the code, which can be expressed in tables and curves. 2.1.48 Design load spectrum design load spectrum The spectrum obtained by multiplying the standard load spectrum by the corresponding partial coefficient. 2.1.49 Design method based on one quiescent repeated stress with constant amplitude
In fatigue reliability design of structures or components, according to the linear cumulative damage law or engineering construction standard full-text information system
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