Hello everyone, I am designing a 7-story steel building using STAAD Pro software. I made it and when I saw it in render view, it showed intermixed I sections at column beam joints. What type of joint is that?
semi-regid weled joints are considered in the design of steel framed structures taking into account the rotation capacity of various joints of the members
The most important connection is the base of the frame it should be fixed to decrease horizontal drift at the top of the multistorey frame.
It is upto the designer discretion that what type of connection he or she is adopting in the steel structural design. If you have considered centreline nodelling then it may show some overlappling part in the render view. Generally either shear type of moment resisting connection are done in framed steel structures . but connection type shall be such that it can resist the vertical and horizontal forces acting on it from the worst load combination.
Pin joints will lead to an unstable frame and will not resist lateral loads as wind loads.
Mr. Mandar asked what type of joints he used in modeling, he did not ask how he should model the joints.
You have a choice of flexible joints stabilized by cross bracing which minimizes the amount of steel required, or rigid joints with stronger components rated for resisting expected moments which minimizes the amount of construction labor, but requires close tolerances in fabrication of large heavy parts. Sometimes a combination of the two can be used in different parts of a large building for example rigid in some parts and cross braced in other parts. Decision depends on economics, earth quake damping needs, schedules, and structural requirements of the architectural design.
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