The OpenSees Community

thanks. I'm gonna try it

equalDOF? The adjacent beam and centerline of the wall are 4 meters apart. Does equalDOF work? The purpose of the stiff beam is 1) to consider the length of the wall and 2) to impose rotations of the wall to adjacent beams. equalDOF, in this case, imposes the rotations of the centerline of wall to t...

wall element at 8th floor

convergence test is NormDispIncr 10.e-6 10 0 this is the warning: WARNING - ForceBeamColumn2d::update - failed to get compatible element forces & deformations for element: 60803(dW: << 27637.1) Domain::update - domain failed in update LoadControl::update - model failed to update for new dU WARNING N...

Hi, I'm trying to connect an RC frame(modeled with nonlinear springs and elastic beam column) to the centerline of a shear wall (modeled with force based elements). Frame and shear wall performs well separately but when I connect the adjacent beams to the shear wall with a stiff beam column element ...

I've just found out that there is a problem with leaning columns. The model works fine without leaning columns. gravity analysis works fine with elastic wall element and fiber with elastic material with the leaning columns. here is the leaning column script: uniaxialMaterial Elastic $strutMatT $EStr...

I performed what you said and the periods are almost the same:
T(elastic element)=0.789 sec
T(fiber with elastic material)=0.784 sec
T(nonlinear fiber section)=0.777 sec
what should i do now?

hi,
I have modeled a shear wall with forceBeamColumn element.
Gravity analysis can't be performed even with zero loads; while the problem can be solved by increasing the amount of steel reinforcement.
what's the problem?

Hi,
How can i assign equal damping ratios in different modes?

So should I add this load to base shear- top displacement diagram of the building?

Why shear of upper stories are zero and only the base carries shear?

I've been analyzing a frame wall 2D building. push over analysis yields a significant base shear (1133 kN) in leaning column base, although the moment of inertia of leaning column is changing to zero in alternate floors. The leaning column script is shown below: element elasticBeamColumn 5011 301 30...

Do you mean that this shear distribution in the first floor in elastic model should not be in the same order as in nonlinear model if it is due to plastic hinge formation in the first floor?

Could this kind of story shear distribution be because of formation of plastic hinge around the mid height of the first story and the uniform drift of upper stories?

Hi, I've been analyzing an 8-Story frame-wall building. Nonlinear dynamic analysis yields large story shears in the first story compared to other stories (about 5 times larger) and almost 90% of this shear is resisted by the shear wall whereas this ratio is 65% in pushover analysis. I tried changing...