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Basic dataStandard ID: DL 5077-1997 (DL5077-1997)Description (Translated English): Specifications for load design of hydraulic structures Sector / Industry: Electricity & Power Industry Standard Classification of Chinese Standard: P55 Word Count Estimation: 102,179 Date of Issue: 10/22/1997 Date of Implementation: 2/1/1998 Quoted Standard: GB 50199-1994; GBJ 9-1987; GBJ 145-1990; DL 5073-1997; DL/T 5058-1996 Summary: This standard applies to all types of structural design of hydraulic structures. DL50:---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Specifications for load design of hydraulic structures Foreword 1 Scope 2 Reference standards 3 General 4 Main symbols 5 Action classification and combination of action effects 6 Building weight and permanent equipment weight7 Hydrostatic pressure8 Lifting pressure9 Dynamic water pressure10 In-situ stress and surrounding rock pressure 11 Earth pressure and silt pressure 12 Wind load and snow load 13 Ice pressure and frost heave 14 Wave pressure 15 Floor and platform live load 16 Bridge crane and door crane load 17 Temperature effect 18 Earthquake action 19 Grouting pressure Appendix A (Standard Appendix) The main functions of hydraulic structure are classified according to time variation Appendix B (Standard Appendix) The material weight of hydraulic structures Appendix C (Standard Appendix) External Water Pressure Reduction Factor of Concrete Lining Pressure Tunnel Appendix D (standard appendix) improved drag coefficient method Appendix E (Standard Appendix) Simple Pipeline Water Hammer Pressure Calculation Formula Appendix F (Standard Appendix) Calculation of Active Earth Pressure Coefficient Ka and Static Earth Pressure Coefficient K0 Appendix G (Standard Appendix) Wave Elements and Climbing Calculation Appendix H (standard appendix) calculation of water temperature in front of the dam Appendix J (Standard Appendix) Standard values of temperature effects during arch dam operation Appendix K (Standard Appendix) Terms used in this specification1 ScopeThis code is applicable to the structural design of various hydraulic structures.2 Reference standardsThe provisions contained in the following standards constitute the provisions of this standard by quotation in this standard. When this standard was published, the editions shown were effect. All standards will be revised, all parties using this standard should explore the possibility of using the latest version of the following standards. GB 50199-94 Unified Standard for Structural Reliability Design of Water Conservancy and Hydropower Projects GB J 9-87 Building Structural Load Specification GB J 145-90 soil classification standards DL/T 5058-1996 Design Specification for Surge Chamber of Hydropower Station3 General3.0.1 In order to unify the function value standards of hydraulic structure design, and make the design meet the requirements of safety and application, economical rationality, and advanced technology, this specification is specially formulated. 3.0.2 This specification is based on the principles stipulated in GB 50199-94 "Unified Standards for Structural Reliability Design of Water Conservancy and Hydropower Engineering". 3.0.3 Other functions not specified in this code shall be determined in accordance with the provisions of various hydraulic structure design codes. 3.0.4 When the hydraulic structure design refers to the functions related to highway, shipping and port engineering, it shall be determined after specific analysis in accordance with the provisions of the design codes of various departments. The relevant provisions of Chapter 4 and Chapter 7, and the subsequent chapters have made specific provisions on the value of various functions and their sub-coefficients. The role of structure usually refers to the general name of various causes of effects (internal force, deformation, etc.) on the structure, and can be classified as direct action and Indirect effect. Direct action refers to the concentrated or distributed force directly applied to the structure, which can also be called "load"; indirect action refers to the effect Causes of external deformation or constrained deformation of the structure, such as earthquakes and temperature effects. For a long time, the engineering community has been accustomed to making no distinction between the two types of roles, Both are called "loads". In order to simplify the name of the code and take care of idioms, this code is still named "Code for Design of Loads on Hydraulic Structures". But in fact, it includes direct and indirect roles. 3.0.3 There are many functions on hydraulic structures, and subject to objective conditions, it is impossible for this code to conduct a comprehensive study of all functions The corresponding regulations only deal with some of the main functions commonly encountered in the design of hydraulic structures. As for the special role of certain buildings (structures), or this regulation Other functions not included in Fan, such as structural prestress, soil pore water pressure and welding deformation of steel structure, etc., can be determined by the corresponding hydraulic structure The design specifications make provisions as needed. 3.0.4 The design rules of the departments of highway, shipping and port engineering, the principles and methods of their value (load) may not be consistent with this code, so When quoting the value of the action (load), the characteristics of the hydraulic structure should be analyzed in detail to determine the value of the related action and its partial coefficient. To be used in conjunction with this specification.5 Action classification and combination of action effects5.1 Function classification and representative value 5.1.1 Various functions in structure, when they are independent in time and space, then each function can be considered as a separate function. "Hydraulics "Standard Standard" adopts three classification methods for action, namely, the variation with time of action, the variation with space position (fixed or movable) and the effect on structure The response characteristics (static or dynamic) are classified. Among them, the classification according to the variability of action over time is the most important classification, because it is directly related to To the choice of probability models of action variables, the value of some actions is also related to the length of their duration. This specification will be based on the "Hydraulic Standards" The variation with time is divided into the following three categories. (1) Permanent effect. the value does not change with time during the design reference period, or its change is negligible compared with the average value; (2) Variable effect. the value changes with time during the design reference period, and its change cannot be ignored compared with the average value (3) Accidental effect. The probability of occurrence in the design reference period is very small, and once it appears, its value is large and the duration is very short. Appendix A "Classification of main functions of hydraulic structure according to time variation" is listed in principle according to Appendix D of "Hydraulic Standards". 5.1.2 When using the partial coefficient limit state design method, the value used in the acting variable in the design expression is called the acting representative value. "Hydraulics The "Standard Standard" stipulates that. the representative values of permanent action and variable action shall adopt the standard value of action, and the representative value of accidental action shall be determined according to the relevant specifications. "water The "Standard of Engineering Standards" specifies specific principles and methods for determining the value of the function standard. When determining the standard values of various permanent and variable actions in this specification, Followed these rules. As for the two main accidental effects in the design of hydraulic structures-the representative values of the hydrostatic pressure and earthquake action when checking the flood level, This specification makes provisions in the relevant chapters. 5.2 Combination of effects 5.2.1 When the entire structure (including foundation and surrounding rock) or a part of the structure exceeds a certain state and cannot meet the functional requirements specified in the design At this time, the specific state is called the limit state of the structure corresponding to the function. Starting from the actual needs of engineering structure design, the limit state can be divided into There are two types of "bearing capacity limit state" and "normal use limit state". The limit state of the bearing capacity of the structure is generally based on the structure or structure The structural member reaches the maximum load-carrying capacity or is unsuitable for continued load-bearing deformation; it is based on the structure or structural structure for the normal use limit state Based on a certain functional limit for normal use or durability requirements. The internal force and deformation caused by the action on the structure, such as axial force, bending moment, Shear forces, displacements, deflections and cracks are collectively called "action effects" and should be determined by structural analysis. According to the different structures, action systems and environmental conditions that may appear in different stages of construction, installation, operation and maintenance, the structure The design status can be divided into the following three types. (1) Enduring condition. It must appear during the normal use of the structure and the duration is very long, generally the same order of magnitude as the structural design benchmark period Design status (2) Transient conditions. design conditions that appear briefly during structural construction (installation), maintenance, or use; (3) Accidental situation. a design situation with a low probability and a short duration during the use of the structure. The above three design conditions, not only the size and duration of the action may be different, but also the structure, type and supporting force transmission conditions of the structure And structural material properties may also be different. Therefore, the design must first distinguish the design status of the structure, and then according to two different limit states Respectively combine the various effects that may occur at the same time to obtain the total effect of the structure. Due to the combination of effects (effects) possible There are many cases, so in all possible combinations, the most unfavorable combination should be taken as the basis of the limit state design. 5.2.2 The "Hydraulic Standards" stipulates that the permanent, transient and accidental conditions should be designed according to the limit state of the carrying capacity. among them, The combination of effects under permanent and transient conditions is called the basic combination, which only considers the combination of permanent effects and variable effects; The combination of action and effect under the condition is called accidental combination, which is a combination of permanent effect, variable effect and a kind of accidental effect. Due to accidental action The probability of occurrence in the design reference period is very small, and the probability of simultaneous occurrence of two accidental effects must be smaller, so only one kind of accidental combination is considered Accidental effect. For example, the hydrostatic pressure when checking the flood level should not be combined with the earthquake action. 5.2.3 In the design expression of the limit state of the partial coefficients, "Hydraulic Standards" adopts the safety level, design status, operation There are five types of sub-coefficients that are related to the variability of material properties and the uncertainty of the calculation model, and are related to the target reliability index, namely. (1) Structural importance coefficient γ0. hydraulic structures or components used to consider different safety levels should have different reliability levels, corresponding to Ⅰ, The three structural safety levels of Ⅱ and Ⅲ adopt 1.1, 1.0 and 0.9 respectively; (2) Design condition factor ψ. used to consider that the structure should have different reliability levels under different design conditions, corresponding to durable conditions, short Different values are used for temporary and accidental conditions; (3) Action sub-coefficients γG and γQ. used to consider the adverse variation of the action on its standard value, but does not reflect the change of the action imposed on the structure The calculation uncertainty calculated as the effect effect; (4) Material performance partial coefficient γm. used to consider the adverse variation of material performance to its standard value; (5) Structure coefficient γd. It is used to consider the uncertainty of the calculation of the action effect, the uncertainty of the calculation model of the structural resistance and the failure of the above partial coefficients Other uncertainties reflected. Among the above five sub-item coefficients, the structural importance factor γ0 has been prescribed by the “Hydraulic Standards”; the action sub-factors γG and γQ are determined by this regulation Fan is given separately for various functions; the remaining three sub-item coefficients are specified by various hydraulic structure design codes. In the occasional combination, the variable value of the participating combination generally adopts its standard value. But considering some variable effects and accidental effects At the same time, the probability of occurrence is small, so this article makes "variable effects that occur at the same The standard value shall be appropriately reduced ". For example, for checking the wave pressure under the flood level, this code stipulates that the calculation of wind speed shall use the multi-year average The annual maximum wind speed is a reduction in the calculated wind speed for a 50-year recurrence period under a durable, short-term design condition. 5.2.4 According to the length of the total duration of the variable effect on the structure, the combination of long-term and short-term effects should be considered for the normal service limit state Happening. The combination of the short-term and permanent effects of variable action is called the combination of short-term effects; the long-term and permanent effects of variable action The combination of long-term effects is called the combination of long-term effects. The variable effect in the combination of short-term effects can directly adopt its standard value; the combination of long-term effects The variable effect in the should be multiplied by its standard value by a long-term combination coefficient ρ less than 1.0 as a frequently occurring variable effect value to participate in the long-term effect combination. The determination method of the long-term combination coefficient ρ has been given in Appendix F of the “Hydraulic Standards”, and specific regulations are made by various hydraulic structural design codes. For the normal use limit state, the “Hydraulic Standards” still stipulates that generally the long-term and short-term combinations corresponding to the permanent design status should be used. For design, short-term combinations corresponding to short-term design conditions can also be considered as needed. When the two effects are combined, each permanent effect and variable The sub-coefficients of the functions can be 1.0.6 Building weight and permanent equipment weight6.1 Building weight 6.1.1 Appendix Table B1 refers to the relevant material weights in GB J9-87 "Code for Loads of Building Structures" and "Technical Specifications for Port Engineering" (1987) Degree, and amended and supplemented according to relevant data of water conservancy and hydropower projects. 6.1.2 In the process of compiling this specification, a total of 52 large-scale normal concrete, water conservancy and hydropower projects at home and abroad (including 25 domestic projects), The actual measured data of roller compacted concrete and asphalt concrete. Normal part of the concrete is measured by the core sample of the drill hole, and the other is measured by the machine port. Gravity measurement; roller compacted concrete is the gravity measured on site by the nuclear density meter; asphalt concrete is the gravity measured by the laboratory. Extensive mathematical statistical analysis The results show that normal concrete and RCC with the same grade and qualified construction can use the same weight value. Heavy clothing for bulky concrete From the normal distribution, for 80% of the projects, the coefficient of variation is 0.005 to 0.01. According to the statistical analysis results, and refer to some comparison As a result of familiarity, the specification lists Appendix Table B2 for design selection. When determining the gravity of concrete by testing, refer to 5.2.2 of "Hydraulic Standards" According to regulations, the value can be taken according to the 0.2 quantile of its probability distribution. 6.1.3 During the compilation of this specification, a total of more than 100 domestic and international (including more than 30 domestic) earth-rock dam compaction dry weight data were collected and carried out A lot of mathematical statistics work. The results show that the compacted dry weight of earth-rock dams follows a normal distribution, and the coefficient of variation of 80% engineering is 0.02 ～ 0.08. According to the statistical analysis results and referring to the design and construction experience of earth and rock dams at home and abroad, the table B3 is listed for design selection. Due to impact There are many factors for the weight of the dam, and the damming materials for each specific project are ever-changing. The attached table B3 only gives a rough range. Engineering design Among them, the compacted dry weight of the earth-rock dam should be determined mainly on the basis of the roller compaction test. With reference to the provisions of 5.2.2 of the “Hydraulic Standards”, its severity can be adjusted according to The value of 0.1 quantile of the probability distribution. The classification of soil in Appendix Table B3 follows GB J145-90 "Classification Standard of Soil". 6.1.4 The weight of hydraulic mass concrete (including normal concrete and RCC) is mainly used to resist overturning and slipping. It is favorable, and the variability of its geometric size is relatively small, and the construction quality control also provides a certain guarantee for the weight of the concrete, so its sub-item is taken The coefficient is 1.0. For ordinary concrete structures, the compilation team of GB J68-84 "Uniform Standards for Building Structure Design" has tested 17 provinces, municipalities and autonomous regions. The self-weight of 2,667 large-scale industrial and civil construction reinforced concrete prefabricated members, and about 10,000 leveling layers, cushion layers, insulation layers, waterproof layers, etc. above 20,000m2 The thickness and partial gravity of each measuring point were counted, and the results showed that the measured average value was 1.060 times the standard value. "Port Engineering Structure Reliability Design The "Unified Standards" compilation team has conducted statistics on 322 samples of concrete and reinforced concrete in port construction throughout the country, and the results show that the average weight The ratio to the standard value is 1.03. Annex 2 of "Hydraulic Standards" (Draft for Review) "Reliability Analysis of Hydraulic Reinforced Concrete Structure and Determination of Sub-item Coefficients" A study was carried out on the permanent effect (mainly the self-weight of hydraulic reinforced concrete), and the results show that the effect of the......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of DL 5077-1997_English be delivered?Answer: Upon your order, we will start to translate DL 5077-1997_English as soon as possible, and keep you informed of the progress. The lead time is typically 5 ~ 8 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of DL 5077-1997_English with my colleagues?Answer: Yes. The purchased PDF of DL 5077-1997_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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