Recent content by peppiniello

arigato, i think that if Fext=0 , it must be Fint=0 wich means that internal forces are self-equilibrated, and not identically zero in your case there must be some "trapped" balanced internal force, which is normal if you have residual displacements. I think of a mass connected to a spring and...

Are you sure you can use a Hinge during a NL TH analysis? A Hinge is something you use for Pushover analysis, which implies monothonically increasing effects If you want to keep using a TH analysis you must define a hinge as a Nonlinear Link Moment-Curvature element check it on the manual...

dear all a question about viscous damping in SAP2000 doing a time history analysis, can I take into account cross-coupling terms between modes due to non proportional (non-classical) damping ? I know SAP2000 accounts for NL coupling, but I don't want to model a hysteretic link, i have a story...

if you add reinforcement when you're afraid your section won't be have enough resistance, you lose control of ductility

hi to all, only a question about current structural and seismic engineering practice worldwide in my Country, engineers usually design R/C structures using software that, once you've set geometry and material properties, make structural check and give you directly design drawings in this way...

hi to all, can anyone tell me if american seismic codes or standards limit the maximum coefficient of friction in sliding devices employed for base isolation? the NEHERP guidelines for buildings FEMA 273-274, 302-303 do not seem to limit the coeff. of friction, neither they prescribe any...

hi users, i've done a pushover analysis using the last 9.0.1 EDUCATIONAL version of sap2000 what happens is: when i plot the capacity curve in the ADRS format, no demand spectrum appear there's just my capacity spectrum (pushover curve) and the radial period lines, but no response spectra...

thanks qshake, that's what i am doing actually, i am using a worksheet (mathcad) for calculating free vibrations of a 2dof system, and since i don't like my results i would check something else greg thanks for the link...

hi to all i am looking for a simple program that makes linear dynamic analysis of spring-mass systems with 2DOF or more, under free vibrations any suggestion?

hi to all, i have some excel sheets with formulas and macros written in italian under a version for windows if i open these files using an apple excel version on my MAC, the program do not recognize formulas and code lines written in italian let's say the function 'sum' in english corresponds...

Hi to all who can tell me the normalisation criterium Excel uses calculating the Fast Fourier Transform FFT(Sn), where Sn is a discrete signal? What i do to obtain the FFT amplitude is the usual evaluation of the complex modulus of the FFT complex array what i find is: the original signal...

Thanks a lot jproj! it solves almost entirely my problem it works perfectly when the charts are created in a progressive way (Chart1, Chart2,...Chartn) but sometimes it gives troubles when (as in my case) there's a previous MacroPrev that brings all the charts to Sheet1, and the charts are...

...can't wait to try it!! thanks

Hi to all, gimme a hand please! I need to print a huge number of excel charts and add them on a paper, which may be done with MSWord is there any mean to create a macro that copies an array of charts from excel and paste them on a wordsheet in a printable and orderly fashion? thanks in...

hi to all i am looking for something that helps to draw symbols on a Word sheet i need to draw restraints, springs, deformed shapes and all the usual symbols of structural mechanics ain't anything working with MS Word (macro, components or whatever)? thanks ;-)