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  1. shchao99

    PEFORM-2D

    Does anyone use Perform-2D to perform nonlinear analysis? I was wondering how can I model the pinching effect of a concrete beam in this program? Thanks,
  2. shchao99

    PEFORM-2D

    Does anybody use Perform-2D to perform nonlinear analysis? My question is that how can we model the pinching effect of beam in this program? Thanks,
  3. shchao99

    Nonlinear dynamic analysis

    Hi, Dr. Alashki-- Thanks for the clear reply. I understand now. There is another question about the nonlinear dynamic analyis. If I perform a nonlinear dynamic analysis for a building structure by using several different EQK time-histories, should I scale each of the PGA to some value so that I...
  4. shchao99

    Nonlinear dynamic analysis

    Hi, When running a nonlinear dynamic analysis for a building, we must use a real earthquake acceleration time history. I was wondering should I scale the PGA of the real EQK to the design PGA I got from the UBC design spectrum? Thanks
  5. shchao99

    Joint reinorcement amount of a RC SMRF

    Thanks, But I are not intended to know how to design the joint, I¢ò¢ý¢û¢ü¡@£@¢é¢ö¢ü¡@¢ü¢÷¡@¢ó¢ö¢÷£@¡@¢é¡@¢ú¢÷¢ý¢ï¢ð¡@¢ö¢ý¢õ¢ê¢í¢ú¡@¢î¢÷¢ú¡@¢ü¢ð¢í¡@¢û¢ü¢í¢í¢ô¡@¢ø¢í¢ú¢ë¢í¢ö¢ü¢é¢ï¢í¡@¢ý¢û¢í¢ì¡@¢ñ¢ö¡@¢ü¢ð¢í¡@¢ê¢í¢é¢õ¡Ð¢ë¢÷¢ô¢ý¢õ¢ö¡Ð¡@¢ò¢÷¢ñ¢ö¢ü compare d to the total amount steel used in whole...
  6. shchao99

    Reinforcemrnt used in beam-column Joint of a RC SMRF

    Hi, does anybody know thatif a RC SMRF desiged by ACI seismic porvisions, in gereral how many percentage of reinforecment of the total reinf. used in a whole RC SMRF will be the reinf. used in the beam-column joint? How to calculate the percentage? by weight? Thanks a lot!
  7. shchao99

    Joint reinorcement amount of a RC SMRF

    Hi, does anybody know that, in gereral how many percentage of reinforecment of the total reinf. used in a whole RC SMRF will be the reinf. used in the beam-column joint? How to calculate the percentage? by weight? Thanks a lot!
  8. shchao99

    Difference between spectrums

    For a Fourier Spectra (Fourier amplitude spectrum), its Y-axis is the velocity unit which related to the energy of a earthquake. From a fourier spectra, you can find during which period range the most energy are distributed. With respect to the response spectra, its Y-axis is the accleration...
  9. shchao99

    DRAIN -2DX?

    Hi, all experts-- I'd like to ask do you know which commerical software could substitute DRAIN-2DX? In other word, it posses all the abilities of DRAIN-2DX which can do puch-over analisis, nonlinear dynamic analysis..... Thanks
  10. shchao99

    low yield point steel?

    Hi, Anybody has heard about low yield point steel?(for seismic-resistance) Can we get this kind steel in any company? Thanks
  11. shchao99

    CONCRETE MOMENT FRAME RETROFIT

    You can take a look at:"Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures: by ACI committee 440
  12. shchao99

    Moment Frames in Both Directions - Problem

    "For seismic design, it's important to have a strong column with a weak beam so that the plastic hinge will form in the beam rather than in the column. However, if this is applied to the situation of a beam framing into the weak axis of a column, the beam size (which is determined from...

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