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dear silvia i have 2 question. i have a building with 3 storey.i want to add a storey with different damping from the building. 1-do can i use rayleigh damping again for this composition? 2-when a building with 3 storey inters to nonlinear area and damping to change.does opensees use rayleigh dampin...

hi dear fmk i tested truss element with A=1m2 and L=1m but the results werenot same with zeroLength element. performance these dampers in reducing response of structures to seismic loading arenot same.and reduction in model with truss element is more. when i define stiffness for spring in damper, do...

hi dear fmk i have a question about modeling damper you had proposed two kind of damper [code] element truss $eleTag $iNode $jNode $A $matTag element zeroLength $eleTag $iNode $jNode -mat $matTag1 $matTag2 ... -dir $dir1 $dir2 [/code] do performance these models in reducing response of structures to...

excuse me dear fmk
may you explain about your reply?
thanks

dear silvia
please help me
thank you

hi dear silvia i modeld a building with 10 storey and 1 bay. in this model i will want just to have shear deformation in each storey so in each storey for beams i used rigid link beams. with equaldof closed all head of columns to base in dof 2.(for eliminating axial deformation) i did linear dynamic...

hi dear fmk
How can i have just shear deformation in columns of a building?( analyse is linear and all beams are rigid)
thank you

hi everybody
How can i define a column with specific stiffness that its axial stiffness is negligible?

thanks for your attention Dr fmk the scripts are: wipe model BasicBuilder -ndm 2 -ndf 3; set m 1; set kg 1; set sec 1; set sec2 [expr $sec*$sec]; set m2 [expr $m*$m]; set g [expr 9.81*$m/$sec2]; set dataDir Data; file mkdir $dataDir; set GMdir "../GMfiles/"; set xDamp 0.02; set PI 3.141592...

hi dr fmk i am sorry, i have a question again :oops: i try to model tmd(tuned mass damper) at top of a building with 3 storey.its including of mass,damping and stiffness.in one node at top of building, i modeled stiffness and dampeing with zerolength.my problem is this that with changeing stiffness(...

hi i try to model tuned mass damper in 3 building with 3,9 and 20 storey after many time i could model stiffness and damper in a node with element zeroLength.now i am not sure about dir.because i want to model translational spring and i think i shuld to use dir 1, but give error .when i use dir 6 my...

you say right i should try first dear fmk my problem in define stiffness in zero-length element didnt solve i use nDMaterial instead uniaxialMaterial and i put element zeroLengthND in my scripts.but when i run model opensees gives this message element zeroLengthND is no longer available,please use t...

hi
can we define 2 zeroLength element in one node?

hi
i provide a uniaxial material.i put stiffness instead $E.but i dont know what put instead $Fy.

uniaxialMaterial Steel02 $matTag $Fy $E $b

thank you very much.