1.0.1 This specification is applicable for seismic design of such steel facilities as vertical facilities, horizontal facilities, tanks, heating furnaces and so on in petrochemical enterprise where seismic fortification intensity is from six to nine degree. For facilities at
the region where fortification intensity is 6, seismic checking computation can be ignored, but measures of seismic constitution should be adopted.
1.0.2 When facilities designed according to this specification subject to seismic action with fortification intensity of construction region, non-compression member of facility may be damaged. But it still can be used by general repair and even it need not to be repaired.
1.0.3 Seismic fortification intensity shall be ascertained according to the files (drawings) which are approved and issued in the light of authorities regulated by country. Generally, basic intensity can be used. For regions and enterprises where earthquake resistant plan and
hazard resistant plan have been made, seismic fortification can be carried out according to approved fortification intensity or dynamic parameters of design earthquake.
1.0.4 When this specification is implemented, it also shall meet regulations of current compulsory standard specification concerned.
1 General
2 Symbols and codes
3 Basic requirements of seismic design
4 Calculation of seismic action
41 General provisions
42 Ground response spectrum
43 Horizontal seismic action calculation of facilities on ground
44 Horizontal seismic action calculation of facilities on floors
45 Calculation of vertical seismic action
5 Horizontal facilities supported by double saddles
51 Calculation of natural vibration period
52 Calculation of seismic action
53 Intensity checking computation of anchor bolt
54 Calculation of overlapping horizontal facilities
6 Spherical tank
61 Calculation of natural vibration
62 Calculation of horizontal seismic action
7 Vertical barrel-type tank
71 Application scope
72 Calculation of natural vibration period
73 Calculation of horizontal seismic action and effect
74 Calculation of vertical stability allowable critical stress of tank wall
76 Calculation of wave height of liquid level generated by fluctuating
77 Measure of seismic constitution
8 Skirt type vertical facilities
81 General provisions
83 Calculation of horizontal seismic action
84 Vertical seismic action
85 Measure of seismic constitution
9 landing leg type (supporting) vertical facility
91 General provisions
93 Calculation of horizontal seismic action
94 Stability and shear checking computation of support
95 Intensity checking computation of anchor bolt
10 Heating furnace
101 General provisions
102 Calculation of natural vibration character
103 Calculation of horizontal seismic action and seismic checking computation
104 Measure of seismic constitution
Checking computation of antivibration of tank wall
Calculation of natural vibration characteristics
Calculation of natural vibration period
Appendix A Flexible matrix element
Wording explanations for this code
Clause Explanation
