What is seismic detailing?

It is the common practice of detailing the structures to improve the ductility and to avoid failure due to the cyclic loading. In addition, seismic detailing is done when structures are not designed for seismic load even when they are located in non-seismic zones as a measure to avoid possible risk.

What are the required spacing requirements for lateral ties for seismic resistant design based on the ACI code?

The spacing of lateral ties should be 100 mm c/c through out the length of lapping. of vertical stirrups should be 8 mm diameter. The spacing should be 100 mm c/c at 1/3 span of beam at supports and 150 mm c/c at remaining mid span of beam.

What design property often determines the size of columns in special moment frames?

Sizing of beams in steel special moment frames typically is controlled by consideration of drift. As a consequence, the sizes of many columns also are drift-controlled because the strong-column/weak-beam provisions discussed earlier demand larger columns if larger beams are used.

What is special moment frame?

NIST (2016). Seismic design of reinforced concrete special moment frames: A guide for practicing engineers, Second Edition, GCR 16- 917-40, NEHRP Seismic Design Technical Brief No.

What is nonlinear dynamic analysis?

A geometrically nonlinear dynamic analysis method is presented for frames which may be subjected to finite rotations in three-dimensional space. A numerical example of a curved cantilever beam under lateral loads indicates the effectiveness of the proposed method in cases with three-dimensional finite rotations.

What is the difference between ordinary and special moment resisting frames?

Ordinary Moment Resisting Frame (OMRF) is a moment-resisting frame not meeting special detailing requirements for ductile behavior. Special Moment Resisting Frame (SMRF) is a moment- resisting frame specially detailed to provide ductile behavior and comply with the requirements given in IS-4326 or IS-13920 or SP6.

What are the differences between ordinary & special moment resisting frames?

(i) Ordinary Moment Resisting Frames are the frames that are unable to fulfill the special detailing requirements for ductile behaviour. (ii) Special Moment Resisting Frames are the frames that are able to fulfill the special detailing requirements for ductile behaviour.

What is non linear seismic analysis?

Analysis in Seismic Design Enabled by advancements in computing technologies and available test data, nonlinear analyses provide the means for calculating structural response beyond the elastic range, including strength and stiffness deterioration associated with inelastic material behavior and large displacements.

Which method is best for seismic analysis?

In general, a static analysis is sufficient for the long-term response of a structure to applied loads. However, if the duration of the applied load is short, such as in the case of an earthquake event, a time history dynamic analysis is required.