Seismic Hazard Assessment. in i China. Introduction of Seismic Zonation Map of China. Xiaojun LI

Transcription

1 Seismic Hazard Assessment Xiaojun LI Institute of Geophysics, s China Earthquake r Administration n Harbin in i China Introduction of Seismic Zonation Map of China

2 Current t Seismic ic Zonation Map p of China is the f fourth r generation e map,and and d issued e d i in n 2001 includes i c l d s PGA A zonation i map and d Tg Tg zonation map and a table l e f for adjustment e nt of Tg g with site t e types e 反应谱特征周期 Tg, 秒 Characteristic s period d Tg(s) 1 zone I Site i Types II III 0.45 IV 0.65 S a / g a max β m a max T a g Τ max β m( ) γ Tg Zonen 2 zone 3 zone T g 6.0 T / s

3 New Generation e Seismic Zonation Map p of China The fifth generation er t n map is being compiled and will be issued in 2012?

4 Outlines of Presentation 1. Development v e ent e of Seismic m ic Zonation n Map of China 2. The feature e of 5G Seismic Zonation Map 3. Compiling of f 5G Seismic ic Zonation t n Map Consideration o ion of site condition n in seismic ic zonation n maps

5 Outlines of Presentation 1. Development of Seismic Zonation n Map of China 2. The feature e of 5G Seismic Zonation Map 3. Compiling of f 5G Seismic ic Zonation t n Map Consideration ion of o site condition n in seismic s ic zonation n maps a

6 Seismic ic Intensity ns y Zonation Map of China first t generation a map, issued sued in 1957 Distribution t i n o of f the h seismic m i c intensity ityt

7 Seismic ic Intensity ns ty y Zonation Map of China (1957) Principle iple and Method Two regulations s were e taken n to determine e e m n future e e earthquakes t q ak s and i its s effect e t on seismic c intensity: 1. Historical c earthquake q ak recurrence c r e c regulation 2. Geological ogic structure u tu e analog alog regulation In compiling g of t the e z zonation map,, t the e geological method e h was used d to o consider e t the e seismic i ic hazard ar in the e region e where r no strong r g earthquake u e occurred c r e but t the e earthquake h u e recurrence e u r n e interval n e was not considered e e The map was disused after r a short period e in n practical r t c application at

8 Distribution i of the seismic i i intensity e t in n zonation i n map A clear difference fer en c e between e e e n the e two t o map,, which i h is due du e to o the e geological structure c u r e analog al regulation e l i used d larger l r area e a with high SI I 9 Distribution r t of the t seismic sms c intensities t nsis i s of historical e earthquakes r Distribution i of historical c l earthquakese r s

9 Seismic ic Intensity ns y Zonation Map of China s second o generation t n map,is a issued d in Distribution t i n o of f the h seismic m i c intensity ityt

10 Seismic Intensity e Zonation t n Map of f China (1977) Principle and Method Two regulations i s were r also adopted: e 1. Historical earthquake h u e recurrence e u r n e regulation e l i 2. Geological e c structure u t r analog regulation What is the progress in second c d zonation i map? 1. The h e earthquake t q ak recurrence c r e c i interval t r was considered d r d 2. Seismic e belts l s were e divided e, through r the e tendency e d n y of earthquake q ak recurrence c r e c analyzed e in the e coming n 100 years 3. The h f framework and method t were r proposed d for seismic i ic hazard d analysis al in n China h n

11 Seismic ic Intensity ns y Zonation Map of China third generation n map, a issued sued in Distribution t i n o of f the h seismic m i c intensity ityt

12 Seismic Intensity e Zonation t n Map of f China (1990) Principle iple and Method Two (modified) ie d) regulations were e adopted: In the h historical i earthquake u e recurrence e u r n e regulation: e take into n o c consideration e of upper p e magnitude e and activity t parameters e r of seismic sm potential n i sourcesr e The progress r in the third zonation n map is: 1. The h e earthquake t q ak recurrence c r e c i interval t r was considered d r d with i h probability r y method 2. The h spatial i and d temporal m heterogeneity e r n of seismic i ic activities i s were r c considered r d 3. The h method t of probabilistic r istic seismic i ic hazard d analysis al was adopted d in c calculating c latin the e predicted r d seismic i intensity n with i h exceeding e i g probability in 50 years s

13 Seismic Intensity e Zonation t n Map of f China (1990) Principle iple and Method In n compiling o this z zonation map: 1. The main work was to provide e the seismic intensity i zonation a map of China with exceeding probability a in n 500 years 2. And n also o a testing peak ground acceleration zonation a map in some region of f China h was obtained, b which was helpful for next t generation mapap

14 Seismic Ground G o Motion Parameter P r m Zonation Map p of China fourth o t generation e t map, p issued s d in 2001 It include c d e two maps s and d one e table t l Two w maps:peak peak p e ground n d acceleration c e e at map and d spectral e t characteristic h ac e r i i c period r map 反应谱特征周期 Tg, 秒

15 Seismic Ground G o Motion Parameter P r m Zonation Map p of China fourth o t generation e t map, p issued s d in 2001 One e table:for t e f adjustment e n t of spectral e c characteristic c h ac r period e r Tg with i h site t types e s Characteristic h r i period Tg(s) I Site i Types II III IV a max β m Tg Zone 1 zone 2 zone 3 zone S a / g a max T a g Τ max β m ( ) γ T g 6.0 T / s

16 Seismic Ground o Motion Parameter r m Zonation Map of f China (2001) 0 In n the fourth map: a 1. The seismic ic intensity was replaced ed with h ground r motion parameters a e rs PGA A and Tg 2. Multi-schemes es of seismic e ic potential source division were e adopted to o consider the uncertainty of seismic activities s 3. The site e condition o ion effect t on n spectral l characteristic r e ic period Tg was consideredo ed

17 Outlines of Presentation 1. Development v e ent e of Seismic m ic Zonation n Map of China 2. The e feature of 5G Seismic Zonation Map Compiling o of f 5G Seismic ic Zonation t n Map Consideration ion of o site condition n in seismic s ic zonation o n maps

18 Seismic Ground G o Motion Parameter P r m Zonation Map p of China fifth t generation e n map, a issued in 2012? 2 It include c d e two maps s and d two o tables s Two w maps:peak peak p e ground n d acceleration c e e at map and d spectral e t characteristic h ac e r i i c period r map

19 Seismic Ground G o Motion Parameter P r m Zonation Map p of China fifth t generation e n map, a issued in 2012? 2 Two o tables:for s f adjustment e n t of peak p e ground n d acceleration c e e at and d spectral e c c characteristic h ac i period e r i Tg with i t h site t types s Site i PGA(g G ) for site type II types s I I II III IV Tg(s) 1 zone 2 zone 3 zone I I Site types II III IVV

20 Seismic Ground o Motion pparameter r a er Zonation Map of f China (2012?) 2?) The h advanced c d points of the zonation map are: e 1. Paying close attention te t to o dividing n the h seismic sm potential n i source r e areas e with high upper p r magnitude t d 2. Using g different f r n ground n motion attenuation n ation relations e for different i fe e t spatial regions e s and regions s with t different f r n seismic sm activities i s 3. Considering r n the h contribution u of t the e calculating u g value e with i h different i fe e t exceeding e i g probabilities s on compiling i n the h zonation map 4. Considering r n the h site e condition i i effect fe t on b both peak ground d acceleration c l r i PGA A and d spectral e characteristic h ac r period r Tgg

21 Outlines of Presentation 1. Development v e ent e of Seismic m ic Zonation n Map of China 2. The feature e of 5G Seismic Zonation Map 3. Compiling of 5G Seismic Zonation Map 4. Consideration io n of site condition io n in seismic ic zonation n map

22 New Seismic Ground Motion Parameter Zonation n Map of China (2012?) Six working teams for compiling map: Group o 1 1:Seismot Seismotectonic e o environment ent and related t d foundation n mapsa Group o 2:Seismic zone and potential seismic source e Group o 3 3:Seismic activity parameterr a r Group o 4 4:Ground motion n attenution n relationst Group o 5 5:Sit Site effect t on n ground r mtion Group o 6 6:Zona Zonation map compiling

23 New Seismic Ground d Motion Parameter er Zonation Map p of China (2012?) ( ) 1.. Working n team 1 Collecting le t the investigating ig ing and research materials Compiling the related foundation maps

24 Epicentral distribution tion of f earthquakes in M 4.7

25 Epicentral distribution tion of f earthquakes in M 5.0.

26 Comprehensive en e isoseismal s s s map p in China

27 Seismotectonic t i map in China i a and d adjacent acent areas a

28 New Seismic Ground Motion Parameter Zonation n Map of China (2012?) 2.. Working team a 2 Modifying d division i n scheme e of f the e seismic s ic belts Compiling g the new division isio scheme of the potential o l seismic s ic sources u based on the e division s scheme e for r the e 4 th generation map

29 New Seismic Ground Motion Parameter Zonation n Map of China (2012?) 2.. Working team a 3 Extending x g two-step tep scheme of potential seismic source to three-step scheme e 1.. Seismic m c zones n divided >seismotectonic eismotectonic s zones divided i i >potential l s seismic ic sources divided 2.. Add d a step- seismotectonic ic zone divided as the e controlling o ll ng part between een seismic s ic zone and potential o l seismic s ic source u

30 e i z e Ch a an ad e t e Seismic zones in China and adjacent areas VI-2 VI-33 VI-4 乌鲁木齐 IV 哈尔滨 长春 V1 VI-1 I V4-3 拉萨 V2-32 VI-5 V3-1 V2-2- V3-2- 西宁兰州 V2-1- 成都 III-5 银川 III-7 西安 呼和浩特 太原 III-4 II-11 武汉 石家庄 III-3 郑州 长沙 北京天津 济南 III-2 合肥 南昌 南京 沈阳 III-1 杭州 上海 III-6 VIII V4-1 V4-24 昆明 贵阳 南宁 II-2- 广州澳门香港 福州 I-1- 台北 I-2 VII 海口 VII 南海诸岛

31 S eismotectonic i c ic zones s in China and d adjacent n areas as

32 南海诸岛 Three-step r e scheme e e of potential n i seismic sm sources c s used: d 29 statistical al zones s ( for seismic i zones) e 77 background k d sources r e (for seismotectonic t i zones) e 1199 seismotectonic t i sourcesc s ( f for active faults) V1 VI 2 VI 1 VI 4 VI 3 乌鲁木齐 V2 3 V4 3 拉萨 V4 1 IV 哈尔滨长春沈阳 VI 5 呼和浩特 I I 5 北京津 V2 2 III 6 银川 I I 7 石家庄太原西宁 II 3 济南兰州 II 4 郑州 II 2 V3 1 西安 V2 1 II 1 成都武汉 VIII V3 2 I 1 长沙贵阳昆明 II 2 广州 I 2 南宁澳门香港 I V4 2 1 海口 VII VII

33 New Seismic Ground Motion Parameter Zonation n Map of China (2012?) 3.. Working team a 3 Determinating ting seismic c activity ity parameters of statistical ti l zones background a o d sourceso seismotectonic ic sources

34 New Seismic Ground Motion Parameter Zonation n Map of China (2012?) 4.. Working team a 4 For ground n motion i attenuation n relatione Factors considered: e e : 1. Great earthquake ake region or Small-moderate ate earthquake e region 2. Strong seismic s activity region or weak e seismic is c activity region Four u attenuation zonesn. 1. Strong earthquake k region in east t China(1) 2.. Strong earthquake k region o in west China. 3. X Xinjiang region(2) Qing-za zang-chuan-dian g a - a region(3) o Small-moderate al l-m earthquake k region(4)

35 New Seismic Ground Motion Parameter Zonation n Map of China (2012?) 5.. Working team 5 Two-parameter w a adjustment way used 1. Peak ground d acceleration c adjusted e with site t types e 2. Spectral p c characteristic period e i adjusted u d with i h site t typess S a S ams =2.5*a ms S ams a ms =a m* F as (a m ) a ms a m T gs =T g + T gs (a m ) 0 T 0 T g T gs T 2 T(sec)

36 Adjustment coefficients f ients for o peak ground acceleration er t Site typesy PGA(g ) for o s site t t type p I II I I I III III IV Adjustment values for spectral t a characteristic ac e i period Tg I 0 I 1 Site typesy III III IV 1 zone zone zone

37 New Seismic Ground Motion Parameter Zonation n Map of China (2012?) 6. Working g team 6 For r compiling of the zonation a map Considering n i ng the peak ground accelerations n with different i t exceeding g probabilities, i and defining ng 1.. Special l s strong g earthquake: 0.5% exceeding probability i i in n 500 years 2. Strong earthquake: ake 2% exceeding g probability li i in n 500 years 3. moderate d earthquake: 10% exceeding probability i in n 500 years 4. Small l l earthquake: 63% exceeding probability ab in 500 years

38 New Seismic Ground Motion Parameter Zonation n Map of China (2012?) Calculating results show K1:SSE/ME SSE/ME(PGA PGA) 2.7~ 3.1 K2:STE/ME STE/ME(PGA PGA) 1.8~2.0 K3:SME/ME SME/ME(PGA PGA) 1/2.8~1/3.0 1/3.0 For the h zonation n n map compiling, PGA= Max a (PGA10%/50Y,PGA2%/50Y/1.9) P 0 0 Y. ) Tg=2π ( PGA10%/50Y/PGV10%/50Y) Y GV 0 0

39 peak k ground g acceleration c e erat o map p and d spectral c characteristic a c ris tic c period e o map p

40 Outlines of Presentation Development D p en of o Seismic Zonation Z n Map of f China The feature of f 5G Seismic Zonation Map 3. Compiling m of 5G Seismic Zonation o n Map 4. Consideration n of site condition n in seismic e smic zonation n maps

41 Consideration io of site condition n n in seismic zonation maps 1.. In first,, second o and third generation e maps (1 1957,1977,1990) 77,199 The site i effect was not t considered n i

42 Consideration io of site condition n n in seismic zonation maps 2. In fourth h generation a maps(2001) The site effect t was s considered o s d on the s spectral e characteristic h r s c periode i d Tg(s) 1 zone 2 zone 3 zone I S Site types II III IV S a ( g ) T ( s )

43 Consideration io of site condition n n in seismic zonation maps 3. In fifth t generation n maps(2012? a 2012?) 2? The site effect t was s considered o s d on both the peak e ground r acceleration and d the e spectral c characteristic a ac risti periode i d S a S ams =2.5*a ms S ams a ms =a m* F as (a m ) a ms a m T gs =T g + T gs (a m ) 0 T 0 T g T gs T 2 T(sec)

44 Consideration io of site condition n n in seismic zonation maps 3. In fifth t generation n maps(2012? a 2012?) 2? Site PGAA (g g ) for site type e III typ es I I 1 I II III IV Fa PGA

45 3.. In fifth generation e maps(2012? 2012?) g Sa (g) T (s)

46 3.. In fifth generation maps(2012? s 2012?) g Sa (g) T (s)

47 3.. In fifth generation maps(2012? s 2012?) g Sa (g) T (s)

48 3.. In fifth generation maps(2012? s 2012?) g Sa (g) T (s)

49 3.. In fifth generation maps(2012? s 2012?) g Sa (g) T (s)

50 3.. In fifth generation maps(2012? s 2012?) g Sa (g) T (s)

51 Some Ideas for Next Generation Seismic m Zonation Map of China The sixth generation er map

52 Some m Ideas for r Next Generation Seismic Zoning Map of China a 1. Ground motion attenuation n relations n should be obtained b i based s on n the ground motion records from m different zones n in China

53 Some m Ideas for r Next Generation Seismic Zoning Map of China a 2. Ground o d motion o n parameter zonation n n maps s with different exceeding probabilities ab should be compiled 3.. Is s possible o s b e to compile e the ground u d motion velocity and n displacement a en zonation n map?

54 Thanks!