You shall calculate the rotational stiffness of the connection and classify it to nominally pinned, semi-rigid or fixed accordingly. Then the analysis model shall be revised correspondingly.
Generally, placing bolts closer to each other makes the connection more flexible in terms of stiffness...
It calculates effective lengths incorrectly and therefore design results may not be expected ones.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
Excellent dik, thanks for sharing!
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
Maybe the wall makes the building behave torsionally.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
Be aware that pushover non linear static analysis will be needed to assess the retrofitting.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
Y axis, do yonot mean vertically?
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
Be aware that Sap automatically considers shear deformation effects which you don’t consider in your calculations.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement...
ETABS can't to that, please use SAFE instead.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
Can you confirm that the control joint is on the upper floor?
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
If carrying out a non linear analysis yes.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
Both methods yield same results. Choosing the Assign-Area-Mesh may be more convenient for the user as the elements are not broken into small ones. But the results will be exactly same.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross...
Eurocode EN1998
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
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some codes recommend to take the vertical spectrum equal to the horizontal one, reduced by 30% and consider a behaviour factor not greater than 1.5.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis...
You shall model the entire structure incl. concrete and steel parts. Drifts will be larger in the steel structure as it is not that stiff as the comcrete one. Maybe some bracing would help.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of...
Imperfection can be imposed by many ways such as:
modeling of the deformed geometry
apply horizontal loading
do nothing as imperfection will be introduces because of the small arithmetic errors within the computer calculations, such as 1e-10
Jason McKee
proud R&D Manager of
Cross Section...
You can export the data to a spreadsheet using Display->Show tables and do some excel work then...
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
This should not change. Shear deformation effects don’t affect the results of frames structures, as their stiffness matrix is derived analytically and not numerically. Consequently another setting may result with n that behavior, for instance the distribution of the loads to the adjacent frames...
I use both ETABS and RISA and am absolutely happy with these.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
You can divide the wall into multiple elements and apply the restrained on the generated nodes.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
You can define an envelope load combination and read the shell reinforcement results for that.
Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reinforcement Design etc.
