![Formulas of Moment Resisting Frame at Bottom Fixed Condition Formulas of Moment Resisting Frame at Bottom Fixed Condition](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLe0qv7YQyCOvvMdqYFIBpUomf-vJs9Kth7vzWCJXL7jyp2Ocy2NJx19LaqZmx-BqP2XL8hm7ZlR2z3_fxCbfHtCZSjKBD8LEi0LGksFGH2iLr-jUpCsOE9MjnOW9q-X7BuCMOI4_XDnc4/s640/Formulas+of+Moment+Resisting+Frame+at+Bottom+Fixed+Condition.jpg)
Reinforced concrete special moment frames are used as part of seismic force-resisting systems in buildings that are designed to resist earthquakes.
Beams, columns, and beam-column joints in moment frames are proportioned and detailed to resist flexural, axial, and shearing actions that result as a building sways through multiple displacement cycles during strong earthquake ground shaking.
Special proportioning and detailing requirements result in a frame capable of resisting strong earthquake shaking without significant loss of stiffness or strength.
These moment-resisting frames are called “Special Moment Frames” because of these additional requirements, which improve the seismic resistance in comparison with less stringently detailed Intermediate and Ordinary Moment Frames.
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