simulations one shear velocity profile need to capture with one set of modulus inherent variability reduction and damping in subsurface strata curves). and associated parameters. Hence a minimum number of simulations would be required, which as per international regulations is of the order of 60 profiles/simulations. 5 3.16 The material Add following after section damping of soil shall 3.16: be limited to be in Maximum material line with values that damping of soil shall is generally observed be limited to 15 percent. and adopted internationally. 3.16 The convolution Add following after approach for SRA sections 3.16: requires many While adopting analysis number of simulation using nonlinear time multiple real domain method, the input THs. The time history should have requirement of time sufficiently small time histories with respect increment and material energy content in the models should be fundamental compatible with strain frequency shall also dependent shear modulus be included. (A and damping curves. The separate section for spatial discretization of specification of THs domain should be selected
one shear velocity profile with one set of modulus reduction and damping curves). simulations need to capture inherent variability in subsurface strata and associated parameters. Hence a minimum number of simulations would be required, which as per international regulations is of the order of 60 profiles/simulations. 5 3.16 Add following after section 3.16: Maximum material damping of soil shall be limited to 15 percent. The material damping of soil shall be limited to be in line with values that is generally observed and adopted internationally. 3.16 Add following after sections 3.16: While adopting analysis using nonlinear time domain method, the input time history should have sufficiently small time increment and material models should be compatible with strain dependent shear modulus and damping curves. The spatial discretization of domain should be selected The convolution approach for SRA requires many number of simulation multiple real THs. The requirement of time histories with respect energy content in the fundamental frequency shall also be included. (A separate section for specification of THs
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