GB 50959-2013 PDF English
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Load code of nonferrous metals engineering structures
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GB 50959-2013: Load code of nonferrous metals engineering structures---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB50959-2013
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50959-2013
Load code of nonferrous metals engineering structures
Issued on. DECEMBER 19, 2013
Implemented on. JULY 01, 2014
Issued by. Ministry of Housing and Urban-rural Development of PRC;
General Administration of Quality Supervision, Inspection and
Quarantine of PRC.
Load code of nonferrous metals engineering
structures
Main drafting organization. China Nonferrous Metals Industry Association
Approved by. Ministry of Housing and Urban-Rural Development of the PRC
Date of implementation. July 1, 2014
China Planning Press
2013 Beijing
Announcement of the Ministry of Housing and Urban-Rural
Development of the PRC
No.258
Ministry of Housing and Urban-Rural Development or PRC on Issuing
National Standards "Load code of nonferrous metals engineering
structures"
The "Load code of nonferrous metals engineering structures" is hereby approved as a
national standard, numbered GB 50959-2013, which will be implemented from July 1,
2014.Among them, Articles (clauses) 3.2.1, 3.2.2, 4.1.1, 4.3.1 (1, 2), 9.1.1 are
mandatory, which must be strictly implemented.
This Code is published and distributed by China Planning Publishing House, under the
organization by the Institute of Standards and Quotas of Ministry of Housing and
Urban-Rural Development of PRC.
Ministry of Housing and Urban-Rural Development of the PRC
December 19, 2013
Table of Contents
Foreword... 6
1 General provisions... 8
2 Terms and symbols... 8
3 Classification of loads and representative values of loads... 13
4 Combination of loads... 14
5 Permanent load... 21
6 Variable load... 22
7 Indirect action... 29
8 Accidental loads... 31
9 Loading condition... 33
Appendix A Variable load on floor and ground f mine engineering... 40
Appendix B Variable load on floor and ground of metallurgical engineering... 43
Appendix C Variable load on floor and ground of metal processing engineering... 57
Appendix D Physical parameters of materials commonly used for engineering... 63
Appendix E Dynamic effect coefficient of machines commonly used for engineering
... 65
Appendix F Simplified calculation of natural vibration frequency of reinforced concrete
ribbed floor... 67
Explanation of wording in this Code... 71
References... 72
1 General provisions
1.0.1 This Code is formulated, in order to meet the needs of non-ferrous metal
engineering construction, AND meet the requirements of industrial buildings and
structures, that are safe, applicable, economically reasonable.
1.0.2 This Code is applicable to the structural design of the main works and auxiliary
facilities, for new construction and expansion of non-ferrous metal mining, smelting,
processing projects.
1.0.3 The actions, which are involved in the design of non-ferrous metal engineering
structures, shall include direct actions (i.e., loads) and indirect actions (including
temperature, deformation, etc.). This Code mainly stipulates the direct effect; the
relevant provisions also apply to the indirect effect.
1.0.4 All kinds of loads and actions, which are used in non-ferrous metal engineering
structures, shall not only comply with this Code, but also comply with the current
relevant national standards.
2 Terms and symbols
2.1 Terms
2.1.1 Action
It is divided into direct action and indirect action. The concentrated or distributed force,
which is exerted on the structure, is a direct action, that is, a load; the cause of the
external deformation or restrained deformation of the structure is an indirect action.
2.1.2 Permanent load
A load, whose value does not change with time, OR whose change is negligible as
compared to the average value, OR whose change is monotonic and can approach the
limit value, during the service life of the structure.
2.1.3 Variable load
A load, whose value varies with time AND whose variation is not negligible, as
compared to the mean, during the service life of the structure.
2.1.4 Accidental load
A load, which does not necessarily occur, during the service life of the structure;
however, once it occurs, its value is large AND has a short duration.
2.1.5 Equivalent uniform live load
A load, whose actual load that is discontinuously distributed is replaced by a uniform
load, so that the load effect obtained on the structure can be consistent with the actual
load effect.
2.1.6 Working load
Under normal production conditions, the load on the floors and grounds, which is
comprehensively generated by operators and their routine tools and appliances, the
quantitative materials, semi-finished products, finished products, small mobile
conveying devices necessary for production, as temporally stored in the production
process.
2.2 Symbols
Gk - The nominal value of permanent load;
Qk - The nominal value of variable load;
SGk - The nominal value of permanent load effect;
SQk - The nominal value of variable load effect;
SAd - The design value of accidental load effect;
Sd - The design value of the load combination effect, in the limit state of the bearing
capacity;
Sds - The design value of the load combination effect, in the limit state of normal use;
Rd - The design value of the resistance of the structural member;
C - The specified limits required for normal use, which are reached by the structure or
member;
3 Classification of loads and representative values of loads
3.1 Classification of loads
3.1.1 The load of non-ferrous metal engineering structure can be divided into three
types. permanent load, variable load, accidental load.
3.1.2 The permanent load shall include the weight of various devices, such as equipment,
furnace, pipeline, silo, facilities, etc., including the fixed configurations, which meet
the production process requirements; the constant weight of materials; the self-weight
of components, accessories, protective layers of the building structure; the fixed soil,
bulk material, liquid pressure, prestress.
3.1.3 The variable loads shall include the working loads on floor and ground, as well as
the loads such as dynamic machines, cranes, storage materials, etc. under normal annual
production conditions; the maintenance and installation loads under abnormal
production conditions; the load of wind, snow, ash deposits; the temperature actions,
deformation actions, frequent earthquake actions.
3.1.4 Accidental loads shall include explosions, impacts, fires, or other huge but short-
term loads, which are caused by accidental accidents, loss of control and other
accidental factors, as well as rare earthquake actions.
3.2 Representative values of loads
4 Combination of loads
4.1 General requirement
4.1.1 The structural design of non-ferrous metal engineering shall distinguish the
design conditions, according to different production conditions and environmental
conditions. The corresponding load combination shall meet the following conditions.
4.1.2 Under permanent design conditions, maintenance and installation loads and
accidental loads shall not be involved in the load combination.
4.2 Combination values of load effect
4.2.1 For the engineering structure design, it shall be based on the actual production
process, equipment configuration, etc., to carry out load combinations, respectively,
under the limit state of bearing capacity and the limit state of normal use of the structure,
for the loads, which may occur simultaneously in the process of use; meanwhile it shall
adopt each most unfavorable combination. Commonly used load combinations shall be
divided into basic combination, nominal combination, quasi-permanent combination,
frequent combination, accidental combination.
4.3 Load coefficients
4.3.1 The partial load coefficient of the basic combination shall be adopted, according
to the following provisions.
4.3.4 The combination value coefficient, frequent value coefficient, quasi-permanent
value coefficient of the variable load of the factory floor and ground can be adopted,
according to the actual project. However, in any case, the combination value coefficient
shall not be less than 0.70; the frequent value coefficient shall not be less than 0.70; the
quasi-permanent value coefficient shall not be less than 0.60.
4.4 Reduction of variable loads
4.4.1 For the floor working load of the factory building, it shall not be reduced, when
calculating the primary beam, secondary beam, slab; when calculating the walls,
columns, foundations of multi-floor and high-rise factory buildings, it can be reduced,
according to the number of floors, OR according to the engineering experience and
actual situation.
4.4.3 For the variable load on the ground of the factory building, it can be reduced when
it is used for checking and calculating the underground structural components. When
the variable load is greater than 5.0 kN/m2 AND the subordinate area is greater than or
equal to 50 m2, the reduction coefficient of the load can be taken as 0.80.For the factory
floor of non-ferrous metal processing engineering, the reduction of variable load shall
comply with the relevant provisions of Appendix C of this Code.
5 Permanent load
5.0.1 The permanent load shall include various structural components, enclosure and
partition components, building accessories, thermal insulation and protective surface
layers of the project, etc.
5.0.2 The permanent load shall also take into account of the weight of the equipment,
kilns, tanks, facilities and other production process devices that are fixedly supported
on the plant structure or foundation, the weight of the long-term stored materials, the
weight of their associated pipes, platforms, filling, protection, etc. The nominal value
of the load shall be calculated, according to the actual project.
5.0.3 The standard load value and relevant calculation parameters, such as the pressure,
hydraulic pressure, prestress, etc., of the long-term action of soil and bulk material, shall
comply with Appendix D of this Code and the relevant provisions of the current national
standard "Code for design of reinforced concrete silos" GB 50077.
6 Variable load
6.1 Variable load on floor and ground
6.1.1 The variable load of the floor can be divided into working load and overhauling
load, which should meet the following requirements.
6.1.2 The working loads on the floors of the following areas, in the workshop building,
shall be determined, according to the relevant professional load conditions. It should
not be less than the following limits.
6.2 Dynamic machine load
6.2.1 When all kinds of machines perform translation, rotation, reciprocating motion or
impact operation, for the nominal value or related parameter value of dynamic load,
which act on its supporting structure or foundation, the manufacturer shall provide the
formal information and data, after ordering the equipment. When it is really difficult, it
can be obtained, by approximate calculation.
6.3 Crane load
6.3.1 The vertical load of the crane shall be the maximum wheel pressure value and the
minimum wheel pressure value, that occur during the operation of the crane. The
standard load value shall be determined, according to the selection and configuration of
the crane.
6.3.2 The horizontal load of the crane can be divided into horizontal longitudinal load
and horizontal lateral load. The nominal value of its load shall comply with the relevant
provisions of the current national standard "Load code for the design of building
structures" GB 50009.
6.5 Load of pipeline and equipment
6.5.1 The load of the pipe network shall include the vertical load, that is, the weight of
the pipeline and the medium, as well as the weight increased or decreased during the
pressure test of the pipeline. It shall also include the horizontal load, such as unbalanced
force and frictional force in the pipeline. When the reciprocating and pulsed pumps are
used to transport the medium, the dynamic load effect of the pipe network system shall
also be calculated. Various loads shall comply with the relevant provisions of the design
standards of pipe network.
6.6 Load of storage material
6.7 Other loads
6.7.1 Variable loads, such as roof live load, amassed ash load, wind load, snow load,
etc., shall comply with the relevant provisions of the current national standard "Load
code for the design of building structures" GB 50009, as well as the relevant added and
supplemented provisions, in the area where the project is located.
7 Indirect action
7.1 Thermal action
7.2 Other actions
7.2.1 Measures shall be taken to avoid large deformation of the foundation, in the
engineering design. When abnormal deformation of the foundation occurs and a large
secondary stress occurs in the relevant structure, meanwhile its action is unavoidable,
the effect of the foundation deformation shall be checked, according to the actual
situation. The selection of the deformation action value shall be selected, according to
the actual engineering. The relevant check calculation shall comply with the relevant
provisions of the current national standard "Code for design of building foundation"
GB 50007.
8 Accidental loads
8.1 General requirement
8.1.1 For the engineering structure, when carrying out engineering evaluation of out-
of-control of major production operations or unexpected accidents, in accordance with
the requirements of current national and industry regulations or approved design
documents, it shall use the accidental loads, to calculate the limit bearing capacity of
the structure and the overall stability of the engineering structure. The accidental loads
of non-ferrous metal engineering shall include the following types.
8.2 Explosion load
8.2.1 The explosion load, which is caused by gas leakage or dust accumulation, should
be adopted, according to the equivalent uniform static load. The nominal value of the
equivalent uniform static load of structural members can be determined, by the
following formula.
8.3 Other loads
8.3.1 For the load value of the accidental impact of the high-speed power production
device, when the parameters such as the mass, movement speed, impact time of the
impact object are obtained, the nominal value of the maximum impact force shall be
calculated as follows.
8.3.2 For large-scale and special production machines and equipment, when short-
circuit, sudden stop and other abnormalities or accidents may occur during operation,
the parameters, such as load, for checking the supporting structure and components, can
be selected from the equipment data.
8.3.3 For engineering structures, such as mine headframes and well towers, the selection
of the sudden rope breaking load, the braking load of the anti-falling device, the
overwinding load shall comply with the relevant provisions of the current national
standard "Code for design of the mine headframes" GB 50385.
9 Loading condition
9.1 General requirement
9.1.1 Various production process loads, which are used in engineering design, shall
be provided by the process and related majors. The conditions mentioned must be
comprehensive, accurate, clear; the load conditions and information shall be
formally provided, in words, tables or diagrams.
9.2 Content of load condition
9.2.1 The permanent load value and its name, item and action area of various equipment,
devices and facilities, in the production process, shall be provided by the process and
related majors. It shall include the following contents.
9.2.2 For the nominal values of variable loads on industrial floors and grounds,
processes and related majors shall make selection, according to the actual project;
propose it after comparing and checking with Appendix A ~ Appendix C of this Code.
It shall meet the following requirements.
9.3 Assessment of load condition
9.3.1 The load conditions, which are provided by the process and related majors, shall
be reviewed and identified; meanwhile it shall comply with the relevant provisions on
the quality management of the design input process in the engineering design.
9.3.2 The engineering structure major shall check the obtained load conditions and data,
in terms of content and depth. For major and critical loads or special and abnormal loads,
they shall be adopted, after passing the relevant review procedures.
9.4 Other regulations
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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