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GB/T 39980-2021: Mechanical parking system - Design rules
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| Standard ID | GB/T 39980-2021 (GB/T39980-2021) |
| Description (Translated English) | Mechanical parking system - Design rules |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | J80 |
| Word Count Estimation | 174,124 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 39980-2021: Mechanical parking system - Design rules
---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.
Mechanical parking system-Design rules
ICS 53.020.99
J80
National Standards of People's Republic of China
Design specification for mechanical parking equipment
Released on 2021-04-30
2021-11-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 3
4 Rating 3
5 Calculation of loads and load combinations 6
6 Structure 25
7 Machinery 64
8 Electrical 98
9 Security 104
Appendix A (informative appendix) Mechanical parking equipment organization classification 119
Appendix B (informative appendix) Selection of steel impact toughness parameters 120
Appendix C (informative appendix) Connection stiffness calculation under tensile load 122
Appendix D (Normative Appendix) The calculated length of compression members and the converted slenderness ratio of lattice members 124
Appendix E (Normative Appendix) Stability Coefficient of Axial Compression Components 127
Appendix F (Normative Appendix) Lateral Buckling Stability Coefficient of Bending Members (Overall Stability Coefficient) 132
Appendix G (informative appendix) Calculation of the overall stability of compression-bending members 135
Appendix H (Normative Appendix) The buckling coefficient in the calculation of the local stability of thin plates 137
Appendix I (Normative Appendix) Curve slope constant m and characteristic fatigue strength Δσc, Δτc 140
Appendix J (Normative Appendix) Fatigue limit design stress ΔσRd, ΔτRd, 1 161
Appendix K (informative appendix) Slewing ring selection and related calculation of installation bolts 163
Appendix L (Normative Appendix) Design Requirements for Parking Space Dimensions and Safety Space 166
Appendix M (Normative appendix) Requirements for the setting of safety protection devices 168
Design specification for mechanical parking equipment
1 Scope
This standard specifies the basic classification of mechanical parking equipment, calculated load and load combination, structure, machinery, electrical and safety, etc.
Design criteria and calculation methods.
This standard applies to all types of mechanical parking equipment (hereinafter referred to as parking equipment) defined in GB/T 26476, but does not involve the above-mentioned parking equipment.
Special problems of vehicle equipment.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 699-2015 High-quality carbon structural steel
GB/T 700-2006 Carbon structural steel
GB/T 755 Rotating motor rating and performance
GB/T 985.1 Recommended grooves for gas welding, electrode arc welding, gas shielded welding and high energy beam welding
GB/T 985.2 Recommended Groove for Submerged Arc Welding
GB/T 1231 Technical requirements for high-strength large hexagon head bolts, large hexagon nuts and washers for steel structures
GB/T 1243 Short pitch precision roller chains, bushing chains, accessories and sprockets for transmission
GB/T 1348-2009 Ductile iron castings
GB/T 1591-2018 Low-alloy high-strength structural steel
GB/T 1800.2-2020 Product Geometric Technical Specification (GPS) Linear Dimension Tolerance ISO Code System Part 2.Standard
Tolerance zone code and limit deviation table of hole and shaft basis of deviation and fit
GB/T 2585-2007 Hot rolled steel rail for railway
GB 2894 Safety signs and guidelines for their use
GB/T 3077-2015 Alloy structural steel
GB/T 3098.1 Mechanical properties of fasteners bolts, screws and studs
GB/T 3098.2 Mechanical properties of fasteners nuts
GB/T 3480 Involute cylindrical gear load capacity calculation method
GB/T 3632 Torsion shear type high-strength bolt connection pair for steel structure
GB/T 3766 General rules and safety requirements for hydraulic transmission systems and their components
GB/T 3811-2008 Crane Design Code
GB/T 4171-2008 Weathering structural steel
GB/T 4208-2017 Enclosure protection grade (IP code)
GB/T 4942.1-2006 Degree of protection for the overall structure of rotating electrical machines (IP code) Classification
GB/T 5117 Non-alloy steel and fine grain steel welding rod
GB/T 5118 hot-strength steel electrode
GB/T 5226.32-2017 Electrical Safety of Machinery Part 32.Technical Requirements for Lifting Machinery
GB/T 5277 Fastener Bolt and Screw Through Hole
GB/T 5293 Non-alloy steel and fine grain steel solid wire, flux-cored wire and welding wire-flux combination classification requirements for submerged arc welding
GB/T 5313-2010 Thickness direction performance steel plate
GB/T 6074 plate chain, connecting ring and sheave size, measuring force and tensile strength
GB 7588 Safety Code for Elevator Manufacturing and Installation
GB/T 8110 Non-alloy steel and fine-grain steel solid welding wire for MIG/GAW
GB/T 8350 Conveyor chain, accessories and sprockets
GB/T 8903 Steel wire rope for elevator
GB/T 8918 Wire Rope for Important Uses
GB/T 9439-2010 Gray iron castings
GB/T 10045 Non-alloy steel and fine grain steel flux-cored welding wire
GB/T 10059-2009 Elevator test method
GB/T 10062 (all parts) calculation method for load carrying capacity of bevel gears
GB/T 11264-2012 hot rolled light rail
GB/T 11352-2009 Cast carbon steel parts for general engineering
GB/T 12470 Submerged arc welding heat-strength steel solid wire, flux-cored wire and welding wire-flux combination classification requirements
GB/T 14048.4 Low-voltage switchgear and control equipment Part 4-1.Contactors and motor starters electromechanical contactors
And motor starter (including motor protector)
GB/T 14048.10 Low-voltage switchgear and control equipment Part 5-2.Control circuit appliances and switching element proximity switches
GB/T 14408 Low-alloy steel castings for general engineering and structure
GB/T 14957 Steel wire for fusion welding
GB/T 15969.1 Programmable Controller Part 1.General Information
GB/T 16754 Design Principles of Mechanical Safety Emergency Stop
GB/T 17493 Heat-strength steel flux-cored welding wire
GB 17799.3 General Standard for Electromagnetic Compatibility Emissions in Residential, Commercial and Light Industrial Environments
GB 17799.4 EMC general standard for emission in industrial environment
GB 18306 China Earthquake Parameter Zoning Map
GB/T 19418 Guidelines for the quality classification of arc welded joint defects of steel
GB/T 20118 General technical requirements for steel wire ropes
GB/T 22437.1-2018 Crane load and load combination design principles Part 1.General
GB/T 26476 Terminology for mechanical parking equipment
GB/T 27546-2011 Hoisting machinery pulley
GB/T 33905.1 Smart Sensor Part 1.General
GB/T 34123-2017 Technical Specification for Inverter Protection of Power System
GB 50017 Steel Structure Design Standard
GB 50057 Code for lightning protection design of buildings
GB 50169 Code for construction and acceptance of grounding devices for electrical installations
GB 50191 Code for seismic design of structures
GB 50223 Classification Standard for Seismic Fortification of Building Engineering
GB 50661-2011 Steel structure welding specification
JB/T 6392 crane wheel
JB/T 7017 Hydraulic buffer for crane
JB/T 7511 Mechanical Coupling Selection Calculation
JB/T 7512.1 arc tooth synchronous belt drive part 1.belt
5.2.4.3 Test load
5.2.4.3.1 General
Before the parking equipment is put into use, static load test and dynamic load test should be carried out. The wind speed during the test should not be greater than 8.3m/s.
5.2.4.3.2 Static load test load
During the test, the parking equipment is stationary, and the test is carried out according to two working conditions. Condition 1.Each parking space should load 1.1P smoothly and without impact.
Condition 2.Load 1.25P smoothly and without impact at the most dangerous position of the lifting platform.
Where P is defined as.
For parking spaces, P is the gravity of the corresponding parking space suitable for the mass of the car;
For the lifting platform, P is the gravity of the rated lifting load.
5.2.4.3.3 Dynamic load test load
During the test, the parking equipment needs to complete various movements and combined movements, and the dynamic load test load should act on the most unfavorable position of the parking equipment. except
Except that the order contract has higher requirements, the dynamic load test load is taken as 1.1P, and the definition of P is the same as 5.2.4.3.2.This lifting test load during verification
The load and the lifting platform and car board that are raised and lowered at the same time shall be multiplied by the dynamic load factor ϕ6 of the dynamic load test load calculated by formula (10).
ϕ6=0.5(1 ϕ2) (10)
Where.
ϕ 6-Lifting dynamic load factor of lifting test load;
ϕ2-Lifting dynamic load factor.
5.2.4.3.4 Special test load
5.2.4.3.4.1 For parking equipment with special requirements, the test load can be higher than the above value, which shall be specified in the order contract or related
It is specified in the product standard.
5.2.4.3.4.2 If the static load test and dynamic load test load are higher than the above-mentioned regulations, the parking equipment shall be checked and calculated according to the actual test load value.
The carrying capacity of the equipment.
5.2.4.4 Load caused by unexpected shutdown
The most unfavorable driving state at the moment of unexpected shutdown (i.e. the sudden braking force or acceleration force and the most unfavorable load group during unplanned shutdown) should be considered.
Close), estimate the load caused by unexpected shutdown according to 5.2.2.2.1, the dynamic load factor ϕ5, see Table 9 for the value.
5.2.4.5 Load caused by failure of mechanism (or component)
In various special situations, emergency braking can be used as an effective protective measure for parking equipment, so the load when the mechanism or component fails
The load can be considered according to the load when the most unfavorable situation occurs and emergency braking is adopted.
When two sets of (double) mechanisms are used for safety reasons, if any part of any mechanism fails, it should be considered that the mechanism has occurred
Invalidate.
For the above two cases, the load caused at this time should be estimated according to 5.2.2.2.1, and the impact generated during the force transmission process should be considered.
effect.
5.2.4.6 Load caused by seismic excitation of foundation
The load caused by the seismic excitation of the foundation refers to the vibration caused to the parking equipment due to the seismic wave forcing the parking equipment foundation to vibrate.
Load.
Only when the seismic fortification intensity is above 6 degrees, the load caused by the external excitation of this kind of foundation is considered.
If the regulations or special technical specifications promulgated by the government have clear requirements for this, they should be based on corresponding regulations or special regulations.
Consider this load. The user of parking equipment should make this request to the manufacturer, and provide the corresponding local seismic spectrum and other information for design
use.
5.2.5 Other loads
These loads are local loads, which only act on the local parts of the parking equipment structure and the components that directly support them.
The magnitude of these loads is related to the purpose of the component and the location of the load. For example, the following loads should be considered in the walkway, platform, passage, etc..
---At the place where items are stacked. 3000N;
---Only used as a walkway or channel. 1500N.
5.3 The basic design method, load situation and load combination of the metal structure design of parking equipment
5.3.1 Basic design method
In the metal structure design of parking equipment, there are usually two methods. allowable stress design method and limit state design method. Allowable
Please refer to Appendix F of GB/T 3811-2008 for application instructions of force design method and limit state design method.
5.3.2 Load situation
When calculating parking equipment and its metal structure, three different basic load conditions should be considered.
a) A---No wind working conditions;
b) B---Windy working conditions;
c) C---Working conditions under special load.
In each load situation, there are several possible specific load combinations corresponding to the actual use situation that may occur.
5.3.3 Load combination
5.3.3.1 Load combination of parking equipment when there is no wind
There are two types of load combinations for parking equipment when there is no wind.
a) A1---Under normal working conditions, the equipment lifts the car without restraint, no wind load and other loads caused by climate influences, this
It should only be combined with the driving acceleration force caused by other driving mechanisms (not including the lifting mechanism) under normal operation control;
b) A2---Under normal working conditions, the parking equipment or handling trolley runs on the track or the ground, and there is no wind load in the working state and
The load caused by other climate influences should be combined with the driving acceleration force of A1 at this time.
5.3.3.2 Load combination of parking equipment under wind working conditions
There are three types of load combinations for parking equipment under windy working conditions. B1, B2, and B3.
a) B1, B2---The load combination is the same as the combination of A1 and A2, but the wind load and other climatic influences in the working state should be considered
Generated load;
b) B3---Under normal working conditions, the parking equipment runs on the ground or on the track at a constant speed and deviates from the wind load and
Loads caused by other climate influences (other mechanisms do not move).
When the ramp load needs to be considered according to the usage of the parking equipment, the ramp load can be regarded as the accidental load on the parking equipment.
It is considered in the load combination under working conditions or windy working conditions.
5.3.3.3 Load combination of parking equipment under special load
There are six types of load combinations when parking equipment is subjected to special loads.
a) C1---Under the maximum calculated wind pressure, the parking equipment has the wind load under the maximum calculated wind pressure and other weather influences.
Load;
b) C2---In the dynamic load test state of the parking equipment, the dynamic load test load is increased, and there is a wind load in the test state, which is combined with the load
A1's driving acceleration force is combined;
c) C3---The parking equipment has a rated lifting load, which is combined with the load generated by the buffer collision force;
d) C4---The parking equipment has a rated lifting load, which is combined with the load caused by unexpected shutdown;
e) C5---The parking equipment has a rated lifting load, which is combined with the load caused by the failure of the mechanism;
f) C6---The parking equipment has a rated lifting load, which is combined with the load generated by the seismic excitation of the parking equipment foundation.
5.3.4 Load combination table and its application
5.3.4.1 Load combination table
The calculated load and load combination table of the metal structure of parking equipment that is subjected to the above various loads is shown in Table 13.
5.3.4.2 Application of load combination table
5.3.4.2.1 Calculation of various loads
The load of each item in Table 13 multiplied by the dynamic coefficient is calculated as follows.
---The load in the first row is the corresponding mass multiplied by the acceleration of gravity, then multiplied by the lifting impact coefficient ϕ1 or multiplied by 1;
---The load in the second row is the corresponding mass multiplied by the acceleration of gravity, and then multiplied by the lifting impact coefficient ϕ2;
---The load in the third row is the corresponding mass multiplied by the acceleration of gravity, and then multiplied by the operating shock coefficient ϕ4;
---The load in the fourth row is the corresponding mass multiplied by the driving acceleration, and then multiplied by the dynamic load factor ϕ5;
---The load in the 10th line is the corresponding mass multiplied by the collision stopping deceleration, and then multiplied by the buffer collision elasticity effect coefficient ϕ7 or press
After the kinetic energy absorbed by the buffer is calculated to buffer the collision, it is then multiplied by the elastic effect coefficient ϕ7 of the buffer collision;
---The load in the 11th and 12th rows is the corresponding mass multiplied by the corresponding stop deceleration, and then multiplied by the dynamic load factor ϕ5.
5.3.4.2.2 Selection of load combination
According to the actual conditions required by the designed parking equipment, select the corresponding load combination according to 5.3.3, and according to the content in Table 13,
Carry out design calculations or carrying capacity check calculations under load combinations.
5.3.4.2.3 Application of load combination table when using allowable stress design method
When the allowable stress design method is used, the allowable stress value is based on the specified strength R (steel yield point, elastic stability) of the material, part, component or connection
The ultimate or fatigue strength calculation of each ultimate stress) divided by the corresponding safety factor n to determine.
5.3.4.2.4 Application of load combination table when using limit state design method
When using the limit state design method, each calculated load should be multiplied by its respective load according to the requirements of each load condition before performing the combined calculation.
Sub-item safety factor γpi.
The ultimate design stress is calculated by the specified strength R (steel yield point, elastic stability limit or fatigue strength) of the material, part, member or link
Each limit stress in) is divided by the resistance coefficient γm to determine, or other generalized limit values are used as the acceptable limit state control value
(Such as the limit value of relative deflection, the limit value of structural vibration attenuation parameters, etc.).
The optional sub-item safety factor γpi is listed in the third, fourth and fifth columns of Table 13.
5.3.4.2.5 Assessment of elastic displacement
In some cases, too large elastic deformation and displacement will prevent the parking equipment from completing its work tasks, and will affect the parking equipment and its
The stability of the structure, or may interfere with the normal function of the structure. At this time, the assessment of elastic displacement should be a component of the bearing capacity check calculation
Part, and the calculated elastic displacement should be properly compared with the determined limit value.
5.3.4.2.6 About fatigue strength check calculation
If it is necessary to check the fatigue strength, it should be carried out in accordance with the principle of 6.8.Generally, the fatigue strength check calculation should be based on A1, A2 (conventional load), etc.
Dutch combination considerations. In some special application cases, it is also necessary to consider some accidental loads and special loads, such as wind loads in working conditions
Loads, lateral loads in skewed operation, test loads, and loads related to the external excitation of the parking equipment foundation.
5.4 Loads, load conditions and load combinations for mechanical design of parking equipment
5.4.1 Loads of mechanical design
5.4.1.1 PM type load
The load determined by the driving torque of the motor or the braking torque of the brake, expressed in PM, belongs to this type of load.
The comprehensive maximum load value that appears during the combination, that is, the meaning of each load P in formula (11) plus the horizontal line, is the same below.
5.4.2.2.2 PR type load
The maximum combined load PR max I of the PR type is determined by the combination of the loads PRQ, PRG, and PRA defined in 5.4.1.2 according to formula (12).
PR maxⅠ=(PRQ PRG PRA)γ'm (12)
Where.
PR maxⅠ---the maximum combined load of the PR type that appears in the load condition Ⅰ (normal operation without wind), the unit is cattle (N);
PRQ --- the load caused by the lifting mass, the unit is cattle (N);
PRG --- the load caused by the quality of the parking equipment parts, the unit is cattle (N);
PRA --- the inertial load caused by the acceleration (deceleration) of the parking equipment or some parts of the unstable movement, the unit is cattle (N);
γ'm ---Increase coefficient.
5.4.2.3 Load combination of load case II (normal working conditions with wind)
5.4.2.3.1 PM type load
The maximum combined load of PM type PM max Ⅱ is calculated according to formula (13) and formula (14) using PMQ, PMG, PMA, PMF defined in 5.4.1.1
The larger of the two combined calculation results is determined.
a) Consider the load combination corresponding to the wind load PMWⅠ and the load PMA when the calculated wind pressure is PⅠ (see Table 11), press
Formula (13) is determined.
PM maxⅡ=(PMQ PMG PMA PMF PMWⅠ)γ'm (13)
Where.
PM maxⅡ---the maximum combined load of the RM type that appears in the load condition Ⅱ (normal work with wind), the unit is cattle (N);
PMQ --- the load caused by the vertical displacement of the lifting mass, in cattle (N);
PMG --- the load caused by the vertical displacement of the center of mass of other moving parts of the parking equipment, the unit is cattle (N);
PMA --- the starting (braking) dynamic inertia load related to the acceleration (deceleration) of the mechanism, the unit is cattle (N);
PMF --- the load corresponding to the frictional force not considered in the transmission efficiency of the mechanism, the unit is Newton (N);
γ'm --- increase coefficient;
PMWⅠ---acting on the working state wind load of parking equipment and hoisting vehicles, the unit is cattle (N).
b) Consider the load combination corresponding to the wind load PMWⅡ when the calculated wind pressure is pⅡ (see Table 11), and determine it according to formula (14).
PM maxⅡ=(PMQ PMG PMF PMWⅡ)γ'm (14)
Where.
PM maxⅡ---the maximum combined load of pM type that appears in load condition Ⅱ (normal work with wind), the unit is Newton (N);
PMQ --- the load caused by the vertical displacement of the lifting mass, in cattle (N);
PMG --- the load caused by the vertical displacement of the center of mass of other moving parts of the parking equipment, the unit is cattle (N);
PMF --- the load corresponding to the frictional force not considered in the transmission efficiency of the mechanism, the unit is Newton (N);
γ'm --- increase coefficient;
PMWⅡ---acting on the working state wind load of parking equipment and hoisting vehicles, the unit is cattle (N).
5.4.2.3.2 PR type load
The maximum combined load PR maxⅡ of the PR type, using the loads PRQ, PRG, PRA defined in 5.4.1.2 and corresponding to the calculated wind pressure is pⅡ
(See Table 11) The load combination acting on the wind load PRWⅡ is determined according to formula (15).
PR maxⅡ=(PRQ PRG PRA PRWⅡ)γ'm (15)
Where.
PR maxⅡ---the maximum combined load of the PR type that appears in the load condition Ⅱ (normal operation without wind), the unit is Newton (N);
PRQ --- the load caused by the lifting mass, the unit is cattle (N);
PRG --- the load caused by the quality of the parking equipment parts, the unit is cattle (N);
PRA --- the inertial load caused by the acceleration (deceleration) of the parking equipment or some parts of the unstable movement, the unit is cattle (N);
PRWⅡ --- the corresponding wind load caused by the working wind pressure, the unit is Newton (N).
5.4.2.4 Load combination of load case Ⅲ (special load action case)
5.4.2.4.1 PM type load
The maximum combined load PM max Ⅲ of the PM type load defined in 5.4.1.1 is the actual transmission of the motor under specific operating conditions
The maximum load given to the organization. The value of PM max III is given in 5.4.2.5.
5.4.2.4.2 PR type load
The maximum combined load PR maxⅢ of the PR type load is taken as the maximum load under the special load in 5.3.3.3, that is, according to formula (16)
determine.
PR maxⅢ=PRG PRWⅢmax (16)
Where.
PR maxⅢ --- the maximum combined load of the PR type that appears in load case Ⅲ (special load case), in units of cattle (N);
PRG --- the corresponding load caused by the parking equipment parts, the unit is cattle (N);
PRWⅢmax---The wind load caused by the maximum calculated wind pressure, the unit is Newton (N).
5.4.2.5 Explanation and application of the above-mentioned calculation of PM-type load
5.4.2.5.1 General
The functions of the various institutions of parking equipment are.
--- Make pure vertical displacement of the center of mass of motion (such as lifting motion);
---The so-called pure horizontal displacement (such as horizontal movement, longitudinal movement, and rotational movement) that makes the center of mass of the movement move horizontally;
--- Make the movement center of mass a combination of vertical and horizontal displacement.
5.4.2.5.2 Lifting movement
The calculation formula of PMmax can be simplified as.
The load conditions Ⅰ and Ⅱ are calculated according to formula (17).
PM maxⅡ=(PMQ PMF PMA)γ'm (17)
The load condition III is calculated according to formula (18).
PM maxⅢ=1.6(PMQ PMF) (18)
Where.
PM maxⅢ---The maximum combined load of the PM type that appears in load case Ⅲ (special load case), in N (N).
Taking into account the general principles put forward in 5.4.2.4.1, it can be considered that the maximum combined load that can be transmitted to the hoisting mechanism is actually limited
1.6 times the PM max I load.
5.4.2.5.3 Horizontal movement
The calculation formula of PM max can be simplified as.
The load condition I is calculated according to formula (19).
PM maxⅠ=(PMF PMA)γ'm (19)
For load condition Ⅱ, take the larger of formula (20) and formula (21).
PM maxⅡ=(PMA PMF PMWⅠ)γ'm (20)
PM maxⅡ=(PMF PMWⅡ)γ'm (21)
For load condition III, for PM max III, take the load corresponding to the maximum torque of the motor (or brake). But if the operating conditions limit the actual
The torque that is actually transmitted, such as the wheel slipping on the track, should be the actual torque that may be transmitted.
5.4.2.5.4 Compound exercise
Load conditions I and II. The loads PM max I and PM max II are determined by the general formulas given in 5.4.2.2.1 and 5.4.2.3.1.
Load situation Ⅲ. When the power used to raise the center of mass, it can be ignored compared with the power required to overcome the influence of acceleration or wind.
The maximum load PM maxⅢ is taken as the load caused by the maximum torque of the motor.
Conversely, when used to overcome the influence of acceleration or wind, the power required for the movement of the center of mass is negligible compared with the power used for the movement of the center of mass.
The maximum charge PM maxⅢ can be calculated as PM maxⅢ=1.6PM maxⅡ.
The various situations between these two limit values should be based on the selected motor, lifting method, and the load caused by inertia and wind.
Study the relative value of the load caused by the increase in the center of mass.
When the operating conditions limit the torque actually transmitted to the mechanism (see 5.4.2.5.3), and it is less than the above value, the limit force of this limit
The moment is taken as the value of PM maxⅢ.
6 Structure
6.1 Metal structures and components
The metal structures of various types of parking equipment are different, but they are composed of many components. The structural parts in this chapter refer to the role of supporting parking equipment.
Loaded components, such as.
a) Steel structure of parking equipment;
b) Supporting fixed components and structural connecting bolts of parking spaces, lifting and conveying devices, horizontal conveying devices, slewing devices, etc.;
c) The guide members, guide rails and supporting members of the handling device;
d) Components of moving parts such as carriers, lifting platforms, horizontal conveying devices, and slewing devices.
These components are composed of rods, plates or shells. According to the force, they can be divided into axial tension members and axial compression members, bending members,
Tension and bending members, compression members, torsion members, bending and torsion members, and other composite stress members.
The steel structure of parking equipment is composed of multiple components, which can be divided into outdoor independent steel structure, indoor independent steel structure and attached steel structure
Structure. The outdoor free-standing steel structure is self-contained, the indoor free-standing steel structure is independently placed in the building, and the attached steel structure is the same as the main building.
coupling.
The steel structure of parking equipment should be designed in accordance with the provisions of Chapter 6 in priority, or according to the corresponding provisions of GB 50017 according to user requirements
design.
6.2 Principles of structural calculation
6.2.1 Calculation method
The structural design calculation of parking equipment can adopt the limit state design method or the stress design method. When the internal force of the structure and the load are nonlinear
In relation to the relationship, the limit state design method should be used.
The limit state is divided into the bearing capacity limit state and the normal service limit state.
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