GB 50057-2010 建筑物防雷设计规范.pdf

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1、1 UDC SSES GB P GB50057-20XX y!9?S Design code for protection of Structures against lightning 9| 2010 M 56 , 20XX X X ? 20XX X X L STy!SSES_f9 ? 2 SSESy!9?SDeTign code for protection of Structures against lightning GB 50057-20XX IS|o1?uMy!S?Sa9BvYp1pSS=M1uy!9?Sv(#M7b?S1= 9FBc M(tn 1p ? W%?d0d1p evM(

2、9TiM9Qysb sHT81pb?S83SH!9xI SS=I !9SgE_SFy!Sy!91(rf ?S1, fZxb,1F 5 Q1 95 lllllllllllllllllllll 8 2 lllllllllllllllllllll 9 3 ys lllllllllllllll 14 4 yn lllllllllllllll 16 4.1 ? llllllllllllllllllll 16 4.2 Byn llllllllllll 18 4.3 =yn llllllllllll 23 4.4 yn llllllllllll 29 4.5 n lllllllllllllllllll 33

3、 5 llllllllllllllllllll 36 5.1 P llllllllllllllll 36 5.2 llllllllllllllllllllll 37 5.3 /L llllllllllllllllllllll 40 5.4 lllllllllllllllllllll 41 6 Hlllllllllllllllll 44 6.1 ? lllllllllllllllllllll 44 6.2 u#HS llllllllll 44 6.3 7a1p lllllllllll 46 6.4 41p llllllllllll 55 c A yM9Q llllllllllll 59 c B

4、ys llllllllllll 62 c C EE ll 63 c D OoES lllllllll 65 c E s kc lllllllllllllllll 74 c F lllllllllllllllllll 76 c G 9 lllllllll 78 c H V=7 llllll 80 c J lllllllllllllllll 82 J.1 d lllllllllllll 82 J.2 0d lllllllllllll 86 ?SM lllllllllllllllllll 89 SDc lllllllllllllllll 90 H llllllllllllllllllll 93 6

5、CONTENTS 1 General principles lllllllllllllllll 8 2 Terms llllllllllllllllllll l 9 3 Classification of structures to be protected against lightning l14 4 Protection measures for structures against lightning lll 16 4.1 General llllllllllllllllllllll 16 4.2 Protection measures for first class of struc

6、tures to be protected against lightning lllllllllllll 16 4.3 Protection measures for second class of structures to be protected against lightning lllllllllllll 23 4.4 Protection measures for third class of structures to be protected against lightning lllllllllllll 29 4.5 Other protection measures ag

7、ainst lightning llllll 33 5 Lightning protection system lllllllllllll 36 5.1 Materials for lightning protection system llllllll 36 5.2 Air-termination system llllllllllllllll 37 5.3 Down-conductor system lllllllllllllll 40 5.4 Earth-termination system lllllllllllllll 41 6 Protection against LEMP lll

8、lllllllllll 44 6.1 General lllllllllllllllllllllll 44 6.2 Lightning protection zones and examples of protection against LEMPlllllllllllllllllllllll 44 6.3 Requirements for magnetic shielding, earthing and equipotential bonding lllllllllllllllll 46 6.4 Requirements for installation and selection of S

9、PDs llll 55 Annex A Expected annual number of lightning flash for structures 59 Annex B Structure parts which are apt to be struck by lightningl62 Annex C Conversion from power frequency earthing resistance of earth-termination system to impulse earthing resistance llll63 Annex D Determination of pr

10、otected volume of air-termination system with rolling sphere method lllllllllllll65 Annex E Values of coefficient kc llllllllllll74 Annex F Lightning currents lllllllllllllll76 Annex G Calculation of induced voltages and currents in loopsl78 7 Annex H Cross-section of the entering cable screen lllll

11、80 Annex J Surge protective deviceslllllllllllll82 J.1 SPDs used in electrical system llllllllllll 82 J.2 SPDs used in electronic system llllllllllll86 Explanations for the words used in this codelllllllll89 List of cited standards and documents llllllllllll90 Appendix: Explanationgs for clausesllll

12、llllllll93 8 951.0.1 Pyc/!9yR| nhy?3&a #H?0dpS VLa/5a6?Sb 1.0.2 ?Sayayayy!9b 1.0.3 y!9aaraa Hq?p#$+$W% iT#b 1.0.4 y!9?SSEC1S ?b 9 2.0.1 lightning flash to earthvclWBQQbb 2.0.2 lightning stroke BQbb 2.0.3 point of strike vlyaa5 La!a*BbBQV?b 2.0.4 lightning current b 2.0.5 lightning protection system

13、(LPS) hyy/ &=Fb 2.0.6 external lightning protection system a/LFb $y b 2.0.7 = internal lightning protection system WFb 2.0.8 air-termination system aaLa#aqFb-EELELEb2.0.9 /L down-conductor system |V.8b 2.0.10 earth-termination system 8L9.i|vb 2.0.11 8 earth electrode rr$T8b 2.0.12 L earthing conduct

14、or V/L5L)88 V0a 88b 2.0.13 direct lightning flash 10 ya8av3rarb 2.0.14 lightning electrostatic induction TP8|MQbH5Y8db3b 2.0.15 H lightning electromagnetic induction MbW3M7b 9 9Qv 0.05 Q /a a8)y 1y#Bb 10 9Qv 0.25 Q /a MaLB yB 4.2.162) h( l1) 53J H4Bn1 4.2.17T4Bi$bWN l1 iVWK8K (m) n iVWK8KiB l1b 8 aO

15、bLOb B/LERv 10$brEqu Va9vE 3000$ m /u Ev 30$b 4.2.2 Byc Hn/1p 1 y=!a5aOaaOa 3vlb5a5( b H 18 mj 24 m /LBQb 19 C9qFr =oi 18 mj 24 m /LBQb 2 !5aO l100 mm HLttWv 30 m l 100 mm H)9tb haDaE)VEv 0.03 $H)Ltb 5 E dK/Vtb 3 0d ERv 10$b aObLObWW ?S 4.2.1 H 5 1pb =!LH ,)b 4.2.3 ByoSn/1p 1 iLRL! ) |a5 )9Q=!8f ?S

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18、?HV9#E H? 10$V 30$bb5Dc 4.3.2 H?b 4.4yn4.4.1 ynR!y aFba ?Sc B ?a,as !iFv 20 m20 m 24 m 16 m yV 60 m HH! !:VHHr$=! $8H8?jV 4.4.5 ?b V 4.4.5 y$8Kl?jH$(m) K (mm) (mm) 60 i 1910 40 !60 420 298 ! 40 V91.89 m2 1 MaMHR5K 2 H!l2 3 H$=T8HVVnV9 Vb 4.4.6 E 50 Hz E v&EbrE ql 3000$ m Hq/8/ ?B#8rv ?HV9#E !/L 31 Ev 30$?S 3.0.4 H 2 ?y5v 10$HVH 1 !8b 1 8rl 5 m f B/L)F8b dTEHTg !i