04-28-2011, 05:40 AM
You can use MIDAS Gen v7.0.2 and ETABS v9.7.2.
Comments on ETABS model:
1. Seismic ELF is in one direction only (X-dir). No seismic load in Y-dir.
2. In the Define Mass Source, if option 3 is selected do not include the load case DEAD because you defined it as selfwt of structural members. Use option From Load if the load case DEAD is included.
3. The ct for RC structure is 0.030 and not 0.035
Comments on MIDAS Gen model:
1. You defined seismic load "eq" wherein the building is subjected to EQX and EQY at the same time, because your scale factor is 1 in both EQX and EQY.
2. You have to define EQX with scale factor of 1 in X-dir and 0.30 in Y-dir if you want to consider orthogonal effect. Without orthogonal effect the scale factor in Y-dir is 0.
3. You have to define EQY with scale factor of 0.30 in X-dir and 1 in Y-dir if you want to consider orthogonal effect. Without orthogonal effect the scale factor in X-dir is 0.
I have not thoriughly examined the two files.There must be other input data that must be corrected.
Comments on ETABS model:
1. Seismic ELF is in one direction only (X-dir). No seismic load in Y-dir.
2. In the Define Mass Source, if option 3 is selected do not include the load case DEAD because you defined it as selfwt of structural members. Use option From Load if the load case DEAD is included.
3. The ct for RC structure is 0.030 and not 0.035
Comments on MIDAS Gen model:
1. You defined seismic load "eq" wherein the building is subjected to EQX and EQY at the same time, because your scale factor is 1 in both EQX and EQY.
2. You have to define EQX with scale factor of 1 in X-dir and 0.30 in Y-dir if you want to consider orthogonal effect. Without orthogonal effect the scale factor in Y-dir is 0.
3. You have to define EQY with scale factor of 0.30 in X-dir and 1 in Y-dir if you want to consider orthogonal effect. Without orthogonal effect the scale factor in X-dir is 0.
I have not thoriughly examined the two files.There must be other input data that must be corrected.