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GB/T 50761-2018

Chinese Standard: 'GB/T 50761-2018'
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GB/T 50761-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB/T 50761-2018
Standard for seismic design of
petrochemical steel equipment
石油化工钢制设备抗震设计标准
ISSUED ON. JANUARY 16, 2018
IMPLEMENTED ON. SEPTEMBER 01, 2018
Issued by. Ministry of Housing and Urban-Rural Development of PRC;
General Administration of Quality Supervision, Inspection and
Quarantine of PRC.
Table of Contents
Foreword ... 6 
1 General provisions ... 8 
2 Terms and symbols ... 9 
2.1 Terms ... 9 
2.2 Symbols ... 10 
3 Basic requirements ... 13 
3.1 Classification of importance factors ... 13 
3.2 Seismic influences ... 13 
3.3 Equipment system design ... 14 
4 Seismic action and seismic checking ... 16 
4.1 General requirements ... 16 
4.2 Seismic design response spectral of above-ground equipment ... 17 
4.3 Horizontal seismic action of above-ground equipment ... 19 
4.4 Horizontal seismic action of on-framework equipment ... 22 
4.5 Vertical seismic action ... 23 
4.6 Combination of loads ... 24 
4.7 Seismic checking ... 25 
5 Horizontal vessels ... 29 
5.1 General requirements ... 29 
5.2 Seismic action and seismic checking ... 29 
5.3 Details of seismic design ... 30 
6 Vertical vessels supported by legs ... 31 
6.1 General requirements ... 31 
6.2 Natural vibration period ... 31 
6.3 Seismic action and seismic checking ... 33 
6.4 Details of seismic design ... 33 
7 Vertical vessels supported by lugs ... 34 
7.1 General requirements ... 34 
7.2 Natural vibration period ... 34 
7.3 Seismic action and seismic checking ... 35 
7.4 Details of seismic design ... 35 
8 Vertical vessels supported by skirt ... 36 
8.1 General requirements ... 36 
8.2 Natural vibration period ... 36 
8.3 Seismic action and seismic checking ... 38 
8.4 Details of seismic design ... 39 
9 Spherical tanks supported by legs ... 41 
9.1 General requirements ... 41 
9.2 Natural vibration period ... 41 
9.3 Seismic action and seismic checking ... 44 
9.4 Details of seismic design ... 45 
10 Vertical cylindrical storage tanks ... 46 
10.1 General requirements ... 46 
10.2 Natural vibration period ... 46 
10.3 Horizontal seismic action and seismic effect ... 47 
10.4 Allowable compression longitudinal stresses of tank shell ... 49 
10.5 Seismic checking of tank shell ... 49 
10.6 Liquid sloshing height ... 52 
10.7 Details of seismic design ... 53 
11 Tubular heater ... 54 
11.1 General requirements ... 54 
11.2 Natural vibration period ... 54 
11.3 Seismic action and seismic checking ... 60 
11.4 Details of seismic design ... 62 
Appendix A Horizontal seismic action of on-framework equipment ... 66 
Appendix B Seismic checking of vertical vessels supported by legs ... 69 
Appendix C Seismic checking of vertical vessels supported by lugs ... 75 
Appendix D Calculation of flexible matrix element ... 79 
Explanation of wording in this standard ... 83 
List of quoted standards ... 84 
Standard for seismic design of petrochemical steel
equipment
1 General provisions
1.0.1 In order to implement the national laws and regulations on earthquake
prevention and disaster reduction, implement a prevention-oriented policy,
mitigate the seismic damage by seismic-fortifying the petrochemical equipment,
reduce economic loss, this standard is hereby formulated.
1.0.2 This standard is applicable to the seismic design of the petrochemical
horizontal vessel, vertical vessels supported by legs, vertical vessels supported
by lugs, vertical vessels supported by skirt, spherical tanks supported by legs,
vertical cylindrical storage tanks, tubular heater, other steel equipment which
are used in the area where the basic seismic acceleration not exceeding 0.40
g or seismic fortification intensity of 9 degrees or less.
1.0.3 For the petrochemical equipment which is subjected to the seismic design
according to this standard, when it is impacted by the fortification earthquakes
equivalent to the seismic fortification intensity of the area, the body, bracing
member, anchoring structure shall not be damaged.
1.0.4 The design parameters of ground motion or the seismic fortification
intensity shall be determined in accordance with the relevant provisions of the
current national standard “Seismic ground motion parameter zonation map of
China” GB 18306. For the construction site where the seismic safety evaluation
is completed, ......
Related standard:   GB/T 50770-2013  GB 50759-2012
   
 
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