1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS B 6944LNG KS B 6944： 2007(2012 ) 2007 10 30 http:/www.kats.go.krKS B 6944： 2007 : ( ) ( ) () ( ) ： ( ) ( ) ( ) : (http:/www.standard.go.kr) ： ：2007 10 30 ：2012 12 3 2012-0666 ： ： ( 02-509-7274) (http:/www.kats.go.kr). 10 5 , . KS B 6944： 2007 i 1 1 2 1 3
2、.1 4 2 5 2 5.1 .2 5.2 PC (prestressing steel) (anchor).2 5.3 (reinforcing steels).3 5.4 .7 5.5 .7 6 .8 6.1 .8 6.2 .8 6.3 .8 6.4 8 6.5 9 6.6 9 6.7 .9 6.8 (suspended deck).12 7 13 7.1 .13 7.2 .13 8 14 8.1 .14 8.2 14 8.3 15 8.4 15 8.5 15 8.6 .17 8.7 (level tolerance)18 9 18 9.1 .18 9.2 .18 9.3 .21 A( )
3、 22 A.1 .22 KS B 6944： 2007 ii A.2 22 A.3 22 B( ) .24 C( ) 25 C.1 (shrinkage strain).25 C.2 (creep strain) .25 C.3 (deformation) 25 C.4 PC 25 C.5 (duct) .26 .27 KS B 6944： 2007 (2012 ) LNG Standard for outer concrete tank and foundation 1 , , , . , . 2 . . ( ) . KS B 6941, LNG KS D 3504, KS D 3505,
4、PC KS D 7002, PC PC BS 7777： 1993, Flat-bottomed, vertical, cylindrical storage tanks for low temperature service Part 3：Recommendations for the design and construction of prestressed and reinforced concrete tanks and tank foundations, and for the design and installation of tank insulation, tank lin
5、ers and tank coatings JGA LNG 地下式 貯槽指針： 1981 , ： 1988 3 KS B 6941 , . 3.1 “ (concrete)” , , , . 3.2 “ (Reinforced Concrete： RC)” , . 3.3 “ (prestress)” . 3.4 “ (prestressing)” . 3.5 “PC (prestressing steel)” . KS B 6944： 2007 2 3.6 “ (tendon)” , , PS , . 3.7 “ (Prestressed Concrete： PC)” , PC . 3.8
6、“ (liner)” LNG (9 % Ni , ) ( ) (vapor barrier) LNG . 4 KS B 6941 . 5 5.1 . 5.2 5.5 . 5.2 PC (prestressing steel) (anchor) , PC (tendon) . . . (jacking stress) 65 % 75 % . (shrinkage), (transfer), (relaxation) (creep) , (prestressing losses) ( C ). LNG (bonded system) . (stressing) . , (slippage) . (
7、ductility) . (notch toughness) . . , PC (maximum tensile stress) . (notch ductility) . (rolling process) (prestressed bar) (brittle fracture) . (prestrain and transfer losses) , (critical strain) . KS B 6944： 2007 3 . 5.2.1 (tendon) (wire), PC KS D 7002, KS D 3505 BS 4486： 1980, BS 5896： 1980 . 7 (s
8、lippage) . 5.2.2 (anchorages) PC . . , . 5.3 (reinforcing steels) 5.3.1 KS D 3504 BS 4449： 1988 . ( ) . (5.3.2 ). 5.3.2 20 20 5.3.1 . BS 4449 . . . 5.3.3 20 20 5.3.1 , . a) 5.3.4 , 9 % . b) PC 1 ANSI/NFPA 59A： 1990 165 . KS B 6944： 2007 4 . 2 LNG , . 1 165 . 1 ( 165 ) (BS 4449) (d) mm MPa 12 12 25 2
9、5 82. 4 68. 6 54.9 PC (BS 4486 BS 5896) 206.9 552.1 5.3.4 5.3.4.1 20 , , (ferritic alloy) . 5.3.4.2 . . 20 LNG , 5.3.4.1 . , . . 5.3.4.2 , (5.3.4.3 ). . 5 . BS 4449 C.1.2 C.1.4 . (NS： Notch Sensitivity) . / (temperature/notch sensitivity transition graph) . (NSR： Notch Sensitivity Ratio) . 5.3.4.2 .
10、 KS B 6944： 2007 5 (cooling chamber) 5001 000 mm . 15 . (lowest design temperature) . (strain) . , (hot rolled bar) , (cold rolled bar) 0.2 % (proof stress) . (percentage plastic elongation) 2d 100 mm (minimum gauge length： Lo) . d . 1(a) . 3 % . (NSR) . %2.0=NSR . NSR1 . (machine grips) . 45 0.25 m
11、m V . (machining techniques) (tolerance) BS EN 10045 1(Metallic materials： Charpy impact test Part 1：test method) . (longitudinal ribbed bar) (rib) 1 mm . (transverse ribbed bar) (crown) ( 2 ). 2d 100 mm (minimum gauge length) 1 % 2(b) . . BS 4449 12. . (elastic range) (maximum stress increase) 180
12、MPa, (plastic range) (maximum strain rate) 0.15 % . Rm (Lo) (permanent percentile increase) . KS B 6944： 2007 6 500 15 x dL oa) (unnotched bar) V-2d 100LL2L2o2d 500 15 x db) (notched bar) 1 V-V-(longitudinal ribbed bar)(transverse ribbed bar)1mm1mm 2 5.3.4.3 . Lo100Lo1002d2d 500 15dV- 500 15dV-V-1 m
13、m1 mm L2L (longitudinal ribbed bar) (transverse ribbed bar) KS B 6944： 2007 7 a) (steelmaking process) b) C, Si, Mn, Ni, P, S c) Cr, Mo Cu d) (billet reheating temperature) e) (finish rolling temperature) f) 5.4 ck 34.323 MPa . , (safety factor) . (expansion coefficient) . . a) (impermeability) b) (
14、freedom from cracks) c) (fire resistance) d) (behaviour at low temperature) e) (durability) f) (resistance to sulphate and chloride attack) . / 0.5 . (admixture) . / . 9 % . . 5 % AE (entrained air) . , . , , , . (ground granulated blast furnace slag： g.g.b.s) . (heat of hydration) . 5.5 5.5.1 LNG .
15、 5.5.2 LNG KS B 6944： 2007 8 LNG , LNG 9 % Ni . LNG . 5.5.3 . 6 6.1 . B . . KS B 6941 . 6.2 . a) (buttress) b) . 6.3 1 PC , , , , . 2 . , . (post-tention) , . 3 . 34.323 MPa . 4 . 6.4 (bonded tendons) . , , (non-bonded tendon) . KS B 6944： 2007 9 . . . . . (integrity) . . (residual stress) . . . . .
16、 (bursting) . (end-block) . . 6.5 . PC . 6.6 . . 6.7 6.7.1 , BS 8110 1： 1987, ACI 318： 1995 . . BS 8110 1 . , , ( A ). 6.7.2 1.0 MPa (minimum residual average compressive stress) KS B 6944： 2007 10 . 1 . 2 . (residual compression zone) . 6.7.3 (base) . . , . 6.7.4 LNG . 1 LNG . BS 8007 . 2 . 3 (differential stress) . 6.7.5 . a) b) (differential radial compressive movement) c) d) e) (wall membrane) . 1
