Assignment 2 Date of assignment 20 January Ecourse

Assignment 2 Date of assignment: 20 January E-course on Seismic Design of Tanks 1

Part I: Reading Assignment 2 n n Read the following: Clause 4. 5 of the Guidelines Clause 6. 4 of IS 1893(Part 1): 2002 Clause 3. 4, 4. 2. 1. 1, and 5. 2. 6 of IS 1893: 1984 Sudhir K. Jain, IIT Kanpur E-Course on Seismic Design of Tanks / January 2006 2

Part II: True / False n Identify the following statements as True or False 2. 1) Seismic force depends on mass of the structure. 2. 2) In IS 1893(Part 1): 2002, there are five seismic zones. 2. 3) In IBC 2003, response modification factor for buildings with good ductility is lower than that for elevated tanks on frame type staging. 2. 4) In IS 1893: 1984, performance factor, K for buildings with good ductility is more than that for elevated tanks. 2. 5) Importance factor for tanks is higher than for buildings. 2. 6)Damping of structure does not affect base shear coefficient. 2. 7) In IS 1893(Part 1): 2002, base shear coefficient depends on type of foundation. Sudhir K. Jain, IIT Kanpur E-Course on Seismic Design of Tanks / January 2006 3

Part III: Questions 2. 1)As per IS 1893: 1984, obtain base shear coefficient for following structures using response spectrum method (Fo = 0. 4, = 1. 0, consider 5% damping) 1) A building with good ductility and time period of 1. 1 sec. 2) A building with low ductility and time period of 1. 1 sec. 3) An elevated tank with time period of 1. 1 sec. 2. 2) For following elevated tanks, obtain base shear coefficient as per IS 1893: 1984 (Fo = 0. 4, = 1. 0) 1) Time period = 0. 5 sec; damping of 0%, 2% and 5% 2) Time period = 1. 4 sec; damping of 0%, 2% and 5% Sudhir K. Jain, IIT Kanpur E-Course on Seismic Design of Tanks / January 2006 4