Basic Geotechnical Earthquake Phần 2 ppsx

... 6.94 06 /28 /66 Parkfield, CA 35 10 6 .25 02/ 09/71 San Fernando Valley, CA 17 14 6.64 10 /28 /83 Borah Peak, ID 33 20 6.93 10/18/89 Loma Prieta, CA 40 16 6. 92 06 /28 / 92 Landers, CA 62 12 7.34 Although the exact ... Table 2. 2 below. Table 2. 2: Rupture area of certain earthquakes (Courtesy: http:// eqseis.geosc.psu.edu) Date Location Length (km) Depth (km) (Mw) 12/ 16/54 Dixie P...

Ngày tải lên: 07/08/2014, 04:21

... Introduction 1 1 .2 Earthquake Records 2 1.3 Earthquake Records of India 4 2. EARTHQUAKES 9 2. 1 Plate Tectonics, The Cause of Earthquakes 9 2. 2 Seismic Waves 15 2. 3 Faults 17 2. 4 Earthquake Magnitude ... Intensity 22 2. 5 Seismograph 26 3. SEISMIC HAZARDS IN INDIA 30 3.1 Introduction 30 3 .2 Earthquake Hazards in India 31 3.3 Earthquake Hazards in the North Eastern...

Ngày tải lên: 07/08/2014, 04:21

... the 28 Basic Geotechnical Earthquake Engineering Fig. 2. 19 Acceleration, velocity and displacement versus time recorded during San Fernando earthquake (Courtesy: Day, 20 02) The geotechnical earthquake ... of vicinity of the fault rupture the fault rupture < 2 –– 3 –– 4 –– 5 0.09g 2 sec 6 0 .22 g 12 sec 7 0.37g 24 sec > 8 > 0.50g > 34 sec 2. 4 .2 Surface W...

Ngày tải lên: 07/08/2014, 04:21

... + 25 ) d (5.1a) a = (2, 154,000)(r) 2. 10 (5.1b) b = (0.046)+(0.445)log(r) (5.1c) d = (2. 515)+(0.486)log(r) (5.1d) where, Y = peak horizontal acceleration (in gal) (1 gal = 1 cm/sec 2 ) M = earthquake ... shear modulus and critical damping ratio is determined using cyclic triaxial testing. 52 Basic Geotechnical Earthquake Engineering Fig. 5.4 approximate relationship for maxi...

Ngày tải lên: 07/08/2014, 04:21

... = 0.4g Aa = 0.5g A 0.1 0 .2 0.3 0.4 0.5 B 0. 12 0 .24 0.33 0.4 0.5 C 0.16 0 .28 0.36 0.44 0.5 D 0 .25 0.34 0.36 0.46 SI A a = Effective peak acceleration SI = Site specific geotechnical investigation ... environments. 54 Basic Geotechnical Earthquake Engineering Selection of Design Earthquake The selection of a design earthquake may be based on: (a) Known design-level and maximu...

Ngày tải lên: 07/08/2014, 04:21

... (Courtesy: Day, 20 02) Table 6.1 Magnitude scaling factors (Courtesy: Day, 20 02) Anticipated earthquake magnitude Magnitude scaling factor 8.5 0.89 7.5 1.00 6.75 1.13 6 1. 32 5 .25 1.50 Factor of ... Day, 20 02)

Ngày tải lên: 07/08/2014, 04:21

... 600 /2 = 300 kN/m for use in Eq. (7.9). q′ = 26 2.5 kN/m 2 from Eq. (7.9) for 2m wide square spread footing. Furthermore, T = 1.8 + 1 .2 – 0.5 = 2. 5m. c 2 = 0 and c 1 = 60 kN/m 2 . T/B = 2. 5 /2 ... faults generating 8.5 magnitude earthquake. 8. k h = 0.1 for severe earthquake, = 0 .2 for violent and destructive earthquake and = 0.5 for catastrophic earthquake. 9 .2. 1...

Ngày tải lên: 07/08/2014, 04:21

... lb/ft. P A =P 1A + P 2A = 479.375 + 27 744.75 = 28 224 . 125 lb/ft P P = (0.5)(k P )(γ b )(D) 2 = (0.5)(3.39)(64) (20 ) 2 = 433 92 lb/ft Moment due to passive force at tieback anchor = (433 92) (26 + (0.667) (20 )) = ... = 6 5 1.707×10 2. 145 7.95655×10 Anchor pull = A P = P P FS A p − = 28 224 . 125 –(433 92/ 2.145) = 7994.75 lb/ft Earthquake case: P E = 1 2 12 k a g H...

Ngày tải lên: 07/08/2014, 04:21

... the types of earthquake resistant structural systems? Briefly explain about them. 5. Comment on earthquake engineering design techniques. 126 Basic Geotechnical Earthquake Engineering Earthquake ... structure. 11.7 .2 Shear Walls The primary function of shear walls is to resist lateral loads. However, they are often 1 32 Basic Geotechnical Earthquake Engineering 1 32 Ach...

Ngày tải lên: 07/08/2014, 04:21

... 15, 16, 26 , 27 , 29 Seismic zonation factor 121 Seismic zone 54 Seismic zoning maps 36 Seismicity 46, 47, 48, 54 Seismogram 16, 27 , 29 Seismograph 2, 23 , 26 , 27 , 28 , 29 Seismologists 26 Seismology ... 73 Standard earthquake 54 Standard Penetration 39 Standard penetration test 67, 69 Standard Wood-Anderson seismograph 23 , 29 Stiffness 38, 40, 41, 42 Strike 12, 19,...

Ngày tải lên: 07/08/2014, 04:21