09-26-2010, 03:43 PM
Greetings do not know if I understood well, but what you want to do is get the bilinear curve, well this is a process see:
1-Create capacity curve of the structure, plotting the base shear against the maximum shift in the highest level of the building, this representation is constructed in the first mode. This is valid for periods less than or equal to 1 second, for periods longer than 1 second to use the effect of higher modes.
2 - We need to determine the seismic demand, to estimate it using a technique called "equal displacement approximation, it is assumed that the inelastic spectral displacement is the same as the elastic displacement.
3 - You must convert the curve of capacity spectrum curve capacidad.y also convert the standard spectrum and spectrum capacity (ADRS).
4 - With these curves if you can build the curve bilinear capacity spectrum.
excuse my poor English, but try to he
Jaime
1-Create capacity curve of the structure, plotting the base shear against the maximum shift in the highest level of the building, this representation is constructed in the first mode. This is valid for periods less than or equal to 1 second, for periods longer than 1 second to use the effect of higher modes.
2 - We need to determine the seismic demand, to estimate it using a technique called "equal displacement approximation, it is assumed that the inelastic spectral displacement is the same as the elastic displacement.
3 - You must convert the curve of capacity spectrum curve capacidad.y also convert the standard spectrum and spectrum capacity (ADRS).
4 - With these curves if you can build the curve bilinear capacity spectrum.
excuse my poor English, but try to he
Jaime