1. A Quick Review on Wenchuan Earthquake Zifa Wang, Baitao Sun Junwu Dai and Shanyou Li Institute of Engineering Mechanics, China Earthquake Administration Chengdu, China, August 04, 2008

2. 1.Strong Ground Motion 2.Earthquake Damage 3.Loss Amount Contents

4. 1. Strong Ground Motion Time ： 14 ： 28 ： 01, May 12, 2008 Location ： Wenchuan, Sichuan Provincne Magnitude ： 8.0 (Ms) Depth ： 14km (depth) Death ： 89 ， 000+ Injury ： 370 ， 000+ Loss ： 700 billion RMB

5. 汶川卧龙台（震中距 18KM ）：幅值大

6. 四川绵竹清平（震中距 87.5 公里，断层距 0.69 公里 )

7. 四川什邡市八角镇

8. 四川什邡市八角镇纪录的傅氏谱和功率谱

9. 山东莘县台校正前加速度记录波形图 ( 持时长 )

10. 四川九寨章扎台（震中距 259km)

11. PGA (NS) Distribution

12. PGA (EW) Distribution

13. PGA (Vertical) Distribution

14. Ground motion Summary Large permanent displacement Elliptical attenuation Long duration

15. 2. Earthquake Damage

16. IEM’s Efforts 1 st expert team dispatched within 2 hours 7 expert teams dispatched, 75 staff Currently, 20+ staff on the field Fields of work Search and rescue Field survey Loss estimation Engineering safety evaluation

17. 汶川地震四川省内调查点分布图

19. Land Slide

26. Road and Bridge

42. Damage of a high-pass bridge in Mianzhu City

51. Power supply and Telecommunication

62. Water supply

70. Complete Collapse of Hongbai Town in Shifang City

71. Complete loss of a mountain village in Xiaoba of Anxian County

74. Soft 1 st story with rotation of 3.4m for the building

75. Landslides near Beichuan County

76. Damage from rolling stones at the new site for Beichuan Middle School

77. Rolling stones in Gaochuan, Anxian County

78. Damage of a rail track between Hongbai and Yinghua in Shifang City

79. 3 steps due to uneven settlement?

80. Damaged bridge near Beichuan County

81. Side view of the damaged bridge near Beichuan County

82. The damaged bridge near Hongbai of Shifang City

83. Liquefaction in Pixian

84. Damage to 4 motors of a crane on top of Zipingpu Dam

85. Damage near expansion joints of Zipingpu Dam

86. A building with minor damage in Hongbai, Shifang City

87. Minor damage to an office building for Beichuan Tea Manufacturer

88. Summary on Damage Weakest link: Buildings in the countryside, schools and without proper seismic design Effect of seismic design Profound effect of lifeline systems Wide spread geotechnical damage

89. 3. Loss Amount

90. USGS ShapeMap: Instrumental Intensity

91. Casualty estimate (May 13) ： 18,000~33,000 Actual ： 68,000+ (May 31, 2008)

92. 调查点分布图

93. 烈度分布图（第一稿） 异常 区比 较多

94. 人员死亡分布图

95. Relief and Reconstruction fund Central Government ： 70B Local Government ： 21-35B （ 30%~50% ） Donations ： 40+B （ May 31, 2008 ） Insurance: ?? Total ： 130+ B

96. We know little about earthquakes Occurrence, ground motion, and damage Weakest link rural areas, schools and old buildings Huge impact of lifeline systems Heavy damage due to geotechnical failure National efforts on search and rescue Risk diversification (catastrophe insurance) Simple and effective measures for rural areas Observations

97. Published report on the earthquake